LockBit ransomware now encrypts Windows domains using group policies

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A brand-new variation of the LockBit 2.0 ransomware has actually been discovered that automates the file encryption of a Windows domain name using Active Directory group policies.

The LockBit ransomware procedure released in September 2019 as a ransomware- as-a-service, where hazard stars are hired to breach networks as well as secure gadgets.

In return, the hired associates gain 70-80% of a ransom money repayment, as well as the LockBit programmers maintain the remainder.

Over the years, the ransomware procedure has actually been really energetic, with a rep of the gang advertising the task as well as supplying assistance on hacking online forums.

After ransomware subjects were outlawed on hacking online forums [1, 2], LockBit started advertising the brand-new LockBit 2.0 ransomware- as-a-service procedure on their information leakage website.

LockBit 2.0 affiliate program features
LockBit 2.0 associate program functions

Included with the brand-new variation of LockBit are many sophisticated functions, with 2 of them laid out listed below.

Uses group plan upgrade to secure network

LockBit 2.0 advertises a lengthy listing of functions with lots of utilized by various other ransomware procedures in the past.

However, one advertised attribute protruded where the programmers declare to have actually automated the ransomware circulation throughout a Windows domain name without the demand for manuscripts.

When hazard stars breach a network as well as ultimately obtain control of the domain name controller, they use third-party software application to release manuscripts that disable anti-viruses and afterwards implement the ransomware on the makers on the network.

In examples of the LockBit 2.0 ransomware uncovered by MalwareHunterTeam as well as examined by BleepingComputer as well as Vitali Kremez, the hazard stars have actually automated this procedure to ensure that the ransomware disperses itself throughout a domain name when carried out on a domain name controller.

When carried out, the ransomware will certainly develop brand-new group policies on the domain name controller that are after that pressed out to every tool on the network.

These policies disable Microsoft Defender’s real-time defense, signals, sending examples to Microsoft, as well as default activities when identifying harmful documents, as revealed listed below.

[General]
Version=% s.
displayName=% s.
[SoftwarePoliciesMicrosoftWindows Defender;DisableAntiSpyware]
[SoftwarePoliciesMicrosoftWindows DefenderReal-Time Protection;DisableRealtimeMonitoring]
[SoftwarePoliciesMicrosoftWindows DefenderSpynet;SubmitSamplesConsent]
[SoftwarePoliciesMicrosoftWindows DefenderThreats;Threats_ThreatSeverityDefaultAction]
[SoftwarePoliciesMicrosoftWindows DefenderThreatsThreatSeverityDefaultAction]
[SoftwarePoliciesMicrosoftWindows DefenderThreatsThreatSeverityDefaultAction]
[SoftwarePoliciesMicrosoftWindows DefenderThreatsThreatSeverityDefaultAction]
[SoftwarePoliciesMicrosoftWindows DefenderThreatsThreatSeverityDefaultAction]
[SoftwarePoliciesMicrosoftWindows DefenderUX Configuration;Notification_Suppress]

Other group policies are produced, consisting of one to develop a arranged job on Windows gadgets that release the ransomware executable.

The ransomware will certainly after that run the adhering to command to press the group plan upgrade to every one of the makers in the Windows domain name.

 powershell.exe -Command "Get-ADComputer -filter * -Searchbase '%s' | foreach{ Invoke-GPUpdate -computer $_.name -force -RandomDelayInMinutes 0}"

Kremez informed BleepingComputer that throughout this procedure, the ransomware will certainly additionally utilize Windows Active Directory APIs to execute LDAP questions versus the domain name controller’s ADS to obtain a checklist of computer systems.

Using this listing, the ransomware executable will certainly be replicated per tool’s desktop computer as well as the arranged job set up by group policies will certainly release the ransomware using the UAC bypass listed below:

 SoftwareMicrosoftWindows NTCurrentVersion ICMCalibration "DisplayCalibrator"

As the ransomware will certainly be carried out using a UAC bypass, the program will certainly run calmly behind-the-scenes with no external alert on the tool being secured.

While MountLocker had actually formerly utilized Windows Active Directory APIs to execute LDAP questions this is the very first time we have actually seen a ransomware automate the circulation of the malware through group policies.

“This is the first ransomware operation to automate this process, and it allows a threat actor to disable Microsoft Defender and execute the ransomware on the entire network with a single command,” Kremez informed BleepingComputer.

“A new version of the LockBit 2.0 ransomware has been found that automates the interaction and subsequent encryption of a Windows domain using Active Directory group policies.”

“The malware added a novel approach of interacting with active directory propagating ransomware to local domains as well as built-in updating global policy with anti-virus disable making ” pentester” operations easier for new malware operators.”

LockBit 2.0 print bombs network printers

LockBit 2.0 additionally consists of a function formerly utilized by the Egregor Ransomware procedure that print bombs the ransom money note to all networked printers.

When the ransomware has actually completed securing a tool, it will continuously publish the ransom money note to any type of linked network printers to obtain the sufferer’s focus, as revealed listed below.

Print bomb of ransom notes
Print bomb of ransom money notes

In an Egregor strike versus retail titan Cencosud, this attribute triggered ransom money notes to flash of invoice printers after they carried out the strike.

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