북한 Kimsuky그룹의 스피어피싱을 통한 악성 LNK파일 : Powershell 백도어 설치 및 RCE 공격 절차 분석

2025-05-19 Igloo Cyber threat report on Kimsuky, LNK

https://www.igloopedia.com/1caf216a-760c-80f7-8328-d581057c6277

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The report examines three malicious LNK files attributed to Kimsuky spear-phishing activity and groups them into two types based on C2 ports, filenames, and Google Drive details. The LNK files masquerade as .docx or .eml documents with Microsoft Word or Outlook icons and use mshta.exe to execute malicious JavaScript and PowerShell. The attack chain uses Dropbox and Google Drive to download reconnaissance code, collect and upload system information, then install a PowerShell backdoor with persistence through Run registry keys and scheduled tasks. Follow-on tooling includes PebbleDash and RDP Wrapper to enable remote control, remote execution, and additional malicious activity.

Indicators of Compromise

Type Value First Seen Last Seen
HASH 3126dfaee1fc0c05f62bafcbbc49782d 2025-05-19 2025-05-19
HASH 29070c5a97b03da08aaa459e09a68e4… 2025-05-19 2025-05-19
HASH 4751a4f6ede387128f4438b852c7a72… 2025-05-19 2025-05-19
HASH d916a1648c2de4c4e5f10fdc3f64d40d 2025-05-19 2025-05-19
HASH dd9ddca86037fe3da0536b80fc98a72… 2025-05-19 2025-05-19
HASH b57459f69e0cbd0a015537f9d098eea… 2025-05-19 2025-05-19
HASH 0930b4fc55767e86d3ca9f4b6a17db6… 2025-05-19 2025-05-19
HASH e91da675c83a037e25479a90249fe87… 2025-05-19 2025-05-19
HASH 9c6dcba96fad01dfc42c00a6fedc4c0… 2025-05-19 2025-05-19
HASH 119f9a871897926ef7f18252ab4e086… 2025-05-19 2025-05-19
HASH 6fa3fa91f98deaa01d8378b2645d25b… 2025-05-19 2025-05-19
HASH 084b0e774019ad450974dc48c5d25e2… 2025-05-19 2025-05-19
HASH 52cc4b42c9ada8a8fa51f8b38a0d1dc… 2025-05-19 2025-05-19
HASH 89c4f041ca42b26bfd6279d99e37408… 2025-05-19 2025-05-19
HASH 8de7168cf3970055a1337f8d240a604… 2025-05-19 2025-05-19
HASH ae6ebf3fcde78bb6da37e302a2a579ee 2025-05-19 2025-05-19
HASH 110dd5d242c6887bfe805325f3f2ffb… 2025-05-19 2025-05-19
HASH 245d729238809b580179b70b7347cf65 2025-05-19 2025-05-19
URL https://www.dropbox.com/scl/fi/… 2025-05-19 2025-05-19
URL https://www.dropbox.com/scl/fi/… 2025-05-19 2025-05-19
URL https://www.dropbox.com/scl/fi/… 2025-05-19 2025-05-19
HASH e6c8eece308c5198bddb65a1f3527b3… 2025-05-08 2025-05-19
HASH 875b0cbad25e04a255b13f86ba361b5… 2025-04-13 2025-05-19
HASH 11afe5cc28666c39d3dc3e9d51f780e… 2025-03-12 2025-05-19
HASH f4c4f68f8b27279b00b718b02392d5d… 2025-03-12 2025-05-19
HASH e6e3a8fb352641bb5b6f6db1479490d… 2025-03-12 2025-05-19
DOMAIN 71532697854-ef1nlsl4cjn4scm57ds… 2025-03-12 2025-05-19
DOMAIN 159263970130-1gil63rpicrhtbo4he… 2025-03-12 2025-05-19
IPv4 74.50.94.175 2025-03-12 2025-05-19
HASH d0a41dfe8f5b5c8ba6a5d0bdc375454… 2025-02-13 2025-05-19
HASH e73e089165c3fd5ff713d658ded55a9… 2025-02-12 2025-05-19

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