During our routine threat hunting activities, we detected a new active
#ClickFix campaign.
Typical; what initially appears to be "robot verification" is actually direct malware distribution.
ATTACK CHAIN
1️) Fake verification page → 151.243.18[.]254
2️) User is prompted to run a PowerShell command
3️) The Base64 encoded command script is decoded and connected to C2 → 94.26.83[.]199
4️) Payload is downloading → /download
CRITICAL POINTS
- The file name changes with each download: "imagetransfer.exe", "audiobackup.exe", "archive_report.exe", "new-photo.exe"
- Each downloaded file has a different name but the same SHA256 hash
- TLS SNI Camouflage: "
ecs.office.com", "
cdn.steamstatic.com"
TECHNICAL BEHAVIORS
Base64 encoding, obfuscation, payload download via PowerShell, %TEMP% drop, silent execution with "-WindowStyle Hidden", console hiding, runtime parsing (GetProcAddress)
CAPABILITIES
Persistence (registry startup), clipboard data collection, webcam access, file system discovery, command execution.
#IOCs
IPs: 151.243.18[.]254, 94.26.83[.]199
Paths: /check, /download
Hash (SHA256): 7d3654531c32d941b8cae81c4137fc542172bfa9635f169cb392f245a0a12bcb
Registry: HKCU\Software\Microsoft\Windows\CurrentVersion\Run
#threathunting #malwareanalysis #powershell #blueteam #soc #dfir #ioc #cyberthreat #cyberthint