New BLISTER Malware Update Fuelling Stealthy Network Infiltration

An up to date variation of a malware loader regarded as BLISTER is remaining applied as section of SocGholish infection chains to distribute an open up-resource command-and-manage (C2) framework called Mythic.

“New BLISTER update incorporates keying feature that lets for precise focusing on of victim networks and lowers publicity in just VM/sandbox environments,” Elastic Security Labs scientists Salim Bitam and Daniel Stepanic mentioned in a technical report revealed late very last thirty day period.

BLISTER was to start with uncovered by the enterprise in December 2021 acting as a conduit to distribute Cobalt Strike and BitRAT payloads on compromised devices.

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The use of the malware together with SocGholish (aka FakeUpdates), a JavaScript-centered downloader malware, to provide Mythic was beforehand disclosed by Palo Alto Networks Unit 42 in July 2023.

In these attacks, BLISTER is embedded within a authentic VLC Media Participant library in an try to get all around security software and infiltrate victim environments.

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Equally SocGholish and BLISTER have been utilized in tandem as portion of several strategies, with the latter made use of as a 2nd-phase loader to distribute Cobalt Strike and LockBit ransomware, as evidenced by Red Canary and Trend Micro in early 2022.

A closer examination of the malware displays that it’s currently being actively preserved, with the malware authors incorporating a slew of approaches to fly less than the radar and complicate analysis.

“BLISTER is a loader that proceeds to stay less than the radar, actively getting utilised to load a wide variety of malware together with clipbankers, information stealers, trojans, ransomware, and shellcode,” Elastic observed in April 2023.

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