Hunt: fake Chocolatey and Massgrave install pages in search results deliver Armorsteal; look for SysCheck2/SysCheckX tasks and C:\Windows\SystemHealth\Update
Zscaler Threat Hunting found an SEO poisoning campaign (September 2026) that ranked lookalike sites for searches like "install Chocolatey" and "Microsoft Activation Scripts". Each site showed a PowerShell one-liner that installed Armorsteal, a Pyarmor-protected Python RAT, keylogger and stealer. The fake Chocolatey command also ran the real installer, so nothing looked wrong.
- Host: scheduled tasks
SysCheck2(at logon, highest privileges) andSysCheckX(SYSTEM, 45 s after boot); a Python 3.11 runtime andSysMon.py,basrq.py,got.pyunderC:\Windows\SystemHealth\Update\;onetime_version.txt/global_version.txtthere; Defender exclusions forC:\Windows. - Process: browsers started with
--remote-debugging-port=9222(cookie theft over the DevTools protocol), and hidden PowerShell that downloads a ZIP. - Network: lure domains
choclatey[.]organdmassgravel[.]net; C2workerstats[.]net,pymons[.]is,datamons[.]org, standbyniceer[.]net,supertrap[.]net; IPs 82.153.135.80, 186.2.175.183, 186.2.163.185, 190.115.31.69, 209.99.186.187. Paths/receive_infof,/get-global,/black-watch/,/infame/receive/; user agentpython-requests/2.31.0. - Note: it exits when
ipinfo.ioreports a cloud provider, so cloud sandboxes can miss it. Tasks are RSA-signed, so operators can push new code at any time.
Both lure sites are down (Sept 25 and about Oct 1), but C2 moved to new domains in October. The 10 SHA-256 hashes are in Zscaler's report.
Sources: Zscaler ThreatLabz: SEO Poisoning Campaign Delivers New Armorsteal Malware (Oct 22)