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LockBit Ransomware Abuses Home windows Defender for Payload Loading

By Eduard Kovacs on August 01, 2022

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A LockBit ransomware operator or affiliate has been abusing Home windows Defender to decrypt and cargo Cobalt Strike payloads throughout assaults, in line with endpoint safety agency SentinelOne.

In April, SentinelOne reported that, in an assault involving LockBit ransomware, menace actors had leveraged a professional VMware command-line utility named ‘VMwareXferlogs.exe’ to side-load a Cobalt Strike payload.

In a unique assault noticed by the cybersecurity agency, the attacker leveraged a command-line device related to Home windows Defender. Particularly, the hackers used ‘MpCmdRun.exe’ to decrypt and cargo post-exploitation Cobalt Strike payloads.

The assault began with exploitation of the Log4Shell vulnerability towards an occasion of VMware Horizon Server. The hackers then performed reconnaissance and tried to amass the privileges wanted to obtain and execute post-exploitation payloads.

“Defenders must be alert to the truth that LockBit ransomware operators and associates are exploring and exploiting novel ‘dwelling off the land’ instruments to help them in loading Cobalt Strike beacons and evading some widespread EDR and conventional AV detection instruments,” SentinelOne mentioned.

“Importantly, instruments that ought to obtain cautious scrutiny are any that both the group or the group’s safety software program have made exceptions for. Merchandise like VMware and Home windows Defender have a excessive prevalence within the enterprise and a excessive utility to menace actors if they’re allowed to function exterior of the put in safety controls,” the corporate added.

The LockBit ransomware has been round since 2019 and it has possible been used to focus on hundreds of organizations. The cybercriminals encrypt victims’ recordsdata and likewise steal priceless info and threaten to make it public until a ransom is paid.

LockBit 3.0, aka LockBit Black, emerged not too long ago. Greater than 60 victims are at the moment listed on the LockBit 3.Zero leak web site, with the cybercriminals demanding thousands and thousands of {dollars} from a number of the victims with the intention to not make their recordsdata public.

LockBit ransomware operators are claiming to supply as much as $1 million as a part of a bug bounty program for vulnerabilities and numerous different sorts of info. Nonetheless, the cybersecurity neighborhood is skeptical of the claims.

Associated: FBI Publishes IOCs for LockBit 2.Zero Ransomware Assaults

Associated: Ransomware Gang Threatens to Leak Information Stolen From Tire Big Bridgestone

Associated: French Ministry of Justice Focused in Ransomware Assault

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