구직자로 위장한 공격자의 Github 악용 악성코드 유포 사례 분석

2025-06-03 ENKI Cyber threat report on ITWorker, T1059.003, T1140

https://www.enki.co.kr/media-center/blog/an-attacker-disguised-as-a-job-seeker-distributing-malware-on-github

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ENKI analyzed GitHub repositories operated by an actor posing as a full-stack and blockchain job seeker under accounts including RealToma, mthomas0802, and L34rnT0C0d3. The actor copied legitimate projects and hid malicious scripts in files such as logger.ts and mm.js, causing users who ran the projects to download DLL malware from Catbox or Dropbox and execute it with rundll32. The final backdoor used multiple threads, IOCP-based HTTP POST C2 communications, Base64 and MT19937-based encoding, mutex-based single-instance control, host profiling, process enumeration, keepalive changes, and code-injection preparation. Infrastructure and delivery changed over time, including C2 shifts from 166.88.90[.]143 to 166.88.117[.]246 and a linked Mercury Swap phishing site that could target cryptocurrency wallets. The article places the activity in the broader risk context of job-themed malware delivery, DPRK IT worker deception, Contagious Interview, and Lazarus-linked Operation DreamJob, but the analyzed GitHub activity should not be attributed beyond what the source supports.

Indicators of Compromise

Type Value First Seen Last Seen
HASH 8b6d6807213c21c84192cc697d96396… 2025-06-03 2025-06-03
HASH 5527f0acb4755e4402434f84c0aac60… 2025-06-03 2025-06-03
HASH 13412b54e3e8f30d3179e54cc653dc6… 2025-06-03 2025-06-03
HASH 52046ad374041f0cabc47e897e10de8… 2025-06-03 2025-06-03
HASH 7790c55c5dded39c0a6a0eabf05665c… 2025-06-03 2025-06-03
HASH 6ac3bd5e67f5ba1f8effbb53d25078e… 2025-06-03 2025-06-03
URL https://files.catbox.moe/mur3el… 2025-06-03 2025-06-03
URL https://app.mercuryswap.io 2025-06-03 2025-06-03
URL https://files.catbox.moe/zxmneq… 2025-06-03 2025-06-03
URL https://www.dropbox.com/scl/fi/… 2025-06-03 2025-06-03
DOMAIN app.mercuryswap.io 2025-06-03 2025-06-03
IPv4 166.88.117.246 2025-06-03 2025-06-03
IPv4 166.88.90.143 2025-06-03 2025-06-03

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