Kimsuky APT: The TrollAgent Stealer Analysis
2024-07-15 • Darkatlas •
https://darkatlas.io/blog/kimsuky-apt-the-trollagent-stealer-analysis
Dark Atlas analyzed Kimsuky's TrollAgent stealer campaign against South Korean targets, with samples compiled in late 2023 and activity tracked from January 2024. The installer used digital signatures from SGA Solutions and D2innovation, dropped a Go-based VMProtect-protected DLL, removed the initial installer with a batch file, and used a ProgramData file tied to the DLL export name as an execution check. TrollAgent created the mutex "chrome development kit 1.0", built a victim profile from the MAC address and version string "[email protected]", encrypted collected data with RSA, and uploaded it to C2 infrastructure. The report identified C2 URLs at sa[.]netup.p-e[.]kr and dl[.]netup.p-e[.]kr and described collection functions for victim data and follow-on work.
Indicators of Compromise
| Type | Value | First Seen | Last Seen |
|---|---|---|---|
| HASH | 47d084e54d15d5d313f09f5b5fcdea0… | 2024-02-16 | 2024-12-13 |
| YARA | TrollAgent_Kimsuky_Stealer | 2024-07-15 | 2024-07-15 |
| HASH | e7b05bcb7247d82e4f83356f6501fdb… | 2024-07-15 | 2024-07-15 |
| HASH | 548c3df040e86892a8f4344efb999ff… | 2024-07-15 | 2024-07-15 |
| HASH | 3e55995b9dd82a34b76f5b79b3ff214… | 2024-07-15 | 2024-07-15 |
| HASH | 36ea1b317b46c55ed01dd860131a7f6… | 2024-02-16 | 2024-07-15 |
| URL | http://sa.netup.p-e.kr/index.php | 2024-02-16 | 2024-07-15 |
| URL | http://dl.netup.p-e.kr/index.php | 2024-02-16 | 2024-07-15 |
| DOMAIN | sa.netup.p-e.kr | 2024-02-16 | 2024-07-15 |
| DOMAIN | dl.netup.p-e.kr | 2024-02-16 | 2024-07-15 |
| HASH | ff3718ae6bd59ad479e375c602a8181… | 2024-01-30 | 2024-07-15 |
| HASH | 61b8fbea8c0dfa337eb7ff978124ddf… | 2024-01-30 | 2024-07-15 |
| HASH | 2e0ffaab995f22b7684052e53b8c64b… | 2024-01-30 | 2024-07-15 |
| HASH | f8ab78e1db3a3cc3793f7680a90dc1d… | 2024-01-30 | 2024-07-15 |
| HASH | 955cb4f01eb18f0d259fcb962e36a33… | 2024-01-30 | 2024-07-15 |
| URL | http://qi.limsjo.p-e.kr/index.p… | 2024-01-30 | 2024-07-15 |
| URL | http://ol.negapa.p-e.kr/index.p… | 2024-01-30 | 2024-07-15 |
| URL | http://ai.negapa.p-e.kr/index.p… | 2024-01-30 | 2024-07-15 |
| URL | http://ar.kostin.p-e.kr/index.p… | 2024-01-30 | 2024-07-15 |
| DOMAIN | ai.negapa.p-e.kr | 2024-01-30 | 2024-07-15 |
| DOMAIN | ar.kostin.p-e.kr | 2024-01-30 | 2024-07-15 |
| DOMAIN | ol.negapa.p-e.kr | 2024-01-30 | 2024-07-15 |
| DOMAIN | qi.limsjo.p-e.kr | 2024-01-30 | 2024-07-15 |
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Shares tags: Kimsuky, T1082, T1059.003