Threats Tagged '7-zip'

A convincing lookalike of the popular 7-Zip archiver site has been serving a trojanized installer that silently converts victims' machines into residential proxy nodes. The fake site, 7zip[.]com, distributes a functional copy of 7-Zip alongside concealed malware. The malware deploys three components: Uphero.exe (service manager), hero.exe (proxy payload), and hero.dll (supporting library). It establishes persistence through Windows services, manipulates firewall rules, and profiles the host system. The primary function is to enroll infected hosts as residential proxy nodes, allowing third parties to route traffic through victims' IP addresses. This campaign appears to be part of a broader operation with similar tactics used for other fake installers. The malware incorporates multiple evasion techniques and uses encrypted communications.

MediumMalwareGermanyFranceUnited Kingdom+7#residential proxy#proxy nodes#lookalike domain

A malware distribution campaign leveraging digitally signed binaries, deceptive packaging, and browser hijackers has been uncovered. The campaign centers around two malicious applications, ImageLooker.exe and Calendaromatic.exe, delivered via self-extracting 7-Zip archives. These artifacts align with the TamperedChef malware campaign, which uses trojanized productivity tools for initial access and data exfiltration. The malware employs NeutralinoJS framework, Unicode homoglyphs, and multiple digital signers to bypass detection. The campaign exploits user behavior through SEO poisoning and malvertising, masquerading as legitimate software. This sophisticated approach highlights the evolving tactics of threat actors in weaponizing PUAs and abusing digital code signing to evade security measures.

MediumMalwareGermanyFranceUnited Kingdom+4#pua#neutralinojs#imagelooker

Insikt Group uncovered new infrastructure linked to GrayAlpha, a threat actor associated with FIN7. They identified a custom PowerShell loader named PowerNet that deploys NetSupport RAT, and another loader called MaskBat. Three main infection vectors were discovered: fake browser updates, fake 7-Zip download sites, and the TAG-124 traffic distribution system. While all three methods were used simultaneously, only the fake 7-Zip sites remained active at the time of writing. The analysis also led to the identification of a potential individual involved in GrayAlpha operations. The group's sophisticated tactics highlight the need for comprehensive security measures, including application allow-listing, employee training, and advanced detection techniques.

MediumMalwareGermanyUnited KingdomFrance+5#fake updates#powernet#7-zip