PULSE NAME
PhantomCaptcha: Multi-Stage WebSocket RAT Targets Ukraine in Single-Day Spearphishing Operation
WHITE PhantomCaptcha AlienVault 2025-10-22 Modified: 2025-11-21
22
IOCs
MEDIUM VOLUME
A coordinated spearphishing campaign targeted NGOs and Ukrainian government administrations involved in war relief efforts. The attack used emails impersonating the Ukrainian President's Office with weaponized PDFs, employing a fake Cloudflare captcha page to execute malware. The final payload was a WebSocket RAT enabling remote command execution and data exfiltration. Despite six months of preparation, the attackers' infrastructure was only active for one day, indicating sophisticated planning and operational security. An additional mobile attack vector was discovered, using fake applications to collect data from Android devices. The campaign demonstrated extensive operational planning, compartmentalized infrastructure, and deliberate exposure control.
Indicators of Compromise (2 / 22 total)
All FileHash-MD5 FileHash-SHA1 FileHash-SHA256 domain
TYPEINDICATORDESCRIPTIONCREATED
FileHash-MD5 77f27ffccd75fc39ea003cbde32c624b 2025-10-22
FileHash-MD5 842d96f208b567e58c5656017fb67df6 2025-10-22