Tools: Silver Dragon Apt: Google Drive C2 & Cobalt Strike Government Ttps
Posted on Mar 4
• Originally published at satyamrastogi.com
Silver Dragon APT exploits public servers and delivers phishing campaigns with Cobalt Strike payloads, using Google Drive as command and control infrastructure to target European and Southeast Asian governments.
Silver Dragon, an APT41-linked threat actor, demonstrates sophisticated tradecraft by weaponizing legitimate cloud services for command and control operations against government entities. This campaign showcases how threat actors abuse trusted platforms like Google Drive to evade detection while maintaining persistent access through Cobalt Strike implants.
Silver Dragon employs a dual-vector approach for initial access, combining opportunistic server exploitation with targeted phishing campaigns. This multi-pronged strategy maximizes their attack surface while providing redundant entry points into target networks.
The threat actor scans for vulnerable internet-facing services using automated reconnaissance tools. They target common attack vectors including:
This approach aligns with T1190 Exploit Public-Facing Application from the MITRE ATT&CK framework.
Silver Dragon crafts targeted phishing emails containing malicious attachments, likely weaponized Office documents or PDFs. The payload delivery mechanism follows T1566.001 Spearphishing Attachment tactics, embedding initial stage loaders that download and execute Cobalt Strike beacons.
As we analyzed in our North Korean npm package attack coverage, threat actors increasingly leverage legitimate platforms for C2 communications, making detection significantly more challenging for network security teams.
Once initial access is achieved, Silver Dragon deploys Cobalt Strike beacons configured to communicate through Google Drive. This technique provides several operational advantages:
The threat actor establishes command and control channels using Google Drive's API endpoints. This technique leverages several evasion methods:
Source: Dev.to
