Matanbuches Malware That Selling For $2500 in Dark-Web Re-Appeared via BeliaDemon Hackers

Matanbuches malware that is distributing over the darkish web via Malware-as-a-Carrier (MaaS) now reappeared via a spear-phishing marketing campaign with malicious attachments.

Malware is attributed to BelialDemon threat actor who is working from a Russian-speaking cybercrime underground forum, and market and promoting the malware for $2500 to infect varied victims across the globe along side mammoth universities and excessive colleges, additionally tech organizations.

Matanbuches loader has lately been seen via unsolicited mail campaigns with the malicious .HTML attachment embedded with base64 and is written in Javascript and HTML language.

Upon the a success execution on the victim’s system, it downloads additional payloads from the C2 servers, along side the cross cobalt strike beacon payload.

Matanbuches Malware Execution Task

First and well-known, The spear-phishing email marketing campaign was as soon as brought to the victims with a malicious .HTML Attachment that posed as a reliable scanned replica with the usage of the Onedrive icon to persuade the victims.

Researchers from CYFIRMA exclusively reported to Cyber Security News “the email features a malicious attachment in .HTML format having embedded base64 which on execution drops a zipper file. Upon clicking the HTML attachment, it drops a zipper archive file and this zip file includes an MSI file. On executing the MSI file, it reveals the incorrect Adobe error message to the person whereas losing the malicious dll file in the background..”

Inside, a malicious ZIP file has embedded with the base64 format Javascript named Scan-23112.zip upon a a success click on on the file results in plunge a ZIP file in the gather folder and make the Matanbuches malware in the victim’s system.

Further prognosis reveals the MSI installer file that has been packed inside the dropped zip file, additionally MSI file has a digital signature that has been revoked later.

Upon the MSI file execution, it pretends to configure the Adobe Front Pack model and throws a incorrect error message.

However the victims accept as true with been unaware of the background direction of where the MSI file creates the AdobeFontPack folder and dropped Two recordsdata.

Soon after the MSI file loads the well-known.dll, it establishes a reference to the C2 server and downloads every other malware that is Cobalt Strike Beacon payload that will plan post-exploitation actions akin to executing PowerShell scripts, logging keystrokes, taking screenshots, downloading recordsdata, and spawns other payloads.

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