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Home Information Security

Amadey Bot Spotted Deploying LockBit 3.0 Ransomware on Hacked Machines

admin by admin
November 8, 2022
in Information Security


The Amadey malware is being used to deploy LockBit 3.0 ransomware on compromised systems, researchers have warned.

“Amadey bot, the malware that is used to install LockBit, is being distributed through two methods: one using a malicious Word document file, and the other using an executable that takes the disguise of the Word file icon,” AhnLab Security Emergency Response Center (ASEC) said in a new report published today.

Amadey, first discovered in 2018, is a “criminal-to-criminal (C2C) botnet infostealer project,” as described by the BlackBerry Research and Intelligence Team, and is offered for purchase on the criminal underground for as much as $600.

While its primary function is to harvest sensitive information from the infected hosts, it further doubles up as a channel to deliver next-stage artifacts. Earlier this July, it was spread using SmokeLoader, a malware with not-so-different features like itself.

Just last month, ASEC also found the malware distributed under the disguise of KakaoTalk, an instant messaging service popular in South Korea, as part of a phishing campaign.

The cybersecurity firm’s latest analysis is based on a Microsoft Word file (“심시아.docx“) that was uploaded to VirusTotal on October 28, 2022. The document contains a malicious VBA macro that, when enabled by the victim, runs a PowerShell command to download and run Amadey.

In an alternative attack chain, Amadey is disguised as a seemingly harmless file bearing a Word icon but is actually an executable (“Resume.exe”) that’s propagated via a phishing message. ASEC said it was not able to identify the email used as a lure.

CyberSecurity

Succeeding in the execution of Amadey, the malware fetches and launches additional commands from a remote server, which includes the LockBit ransomware either in PowerShell (.ps1) or binary (.exe) formats.

LockBit 3.0, also known as LockBit Black, launched in June 2022, alongside a new dark web portal and the very first bug bounty program for a ransomware operation, promising rewards of up to $1 million for finding bugs in its website and software.

“As LockBit ransomware is being distributed through various methods, user caution is advised,” the researchers concluded.





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