Malware Disguised as Normal Documents (Kimsuky)

2023-02-15 Ahnlab

https://asec.ahnlab.com/en/47585/

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AhnLab reported Kimsuky document malware distributed beyond security-related targets to broadcasting and ordinary corporate users. The lures used DOCX filenames such as questionnaires, cover letters, and planning documents, then relied on template injection to download malicious Word macro templates from compromised Korean websites. When macros ran, a batch file used curl to fetch a decoy document and VBS payload, which collected system, antivirus, recent Word-file, download-directory, process, and IE registry information before registering persistence through Task Scheduler. Representative infrastructure included gdtech[.]kr, ddim.co[.]kr, and hydrotec.co[.]kr paths serving init.dotm, state.dotm, list.php, and show.php components.

Indicators of Compromise

Type Value First Seen Last Seen
HASH 55a46a2415d18093abcd59a0bf33d0a9 2023-02-03 2023-10-30
DOMAIN jooshineng.com 2023-02-03 2023-10-30
HASH 83b4d96fc75f74bb589c28e8a9eddbbf 2023-02-03 2023-02-15
HASH 705ef00224f3f7b02e29f21eb6e10d02 2023-02-03 2023-02-15
HASH 873b2b0656ee9f6912390b5abc32b276 2023-02-03 2023-02-15
URL http://jooshineng.com/gnuboard4… 2023-02-03 2023-02-15
URL http://www.hydrotec.co.kr/bbs/i… 2023-02-03 2023-02-15
URL http://gdtech.kr/gnuboard4/adm/… 2023-02-03 2023-02-15
URL http://www.hydrotec.co.kr/bbs/i… 2023-02-03 2023-02-15
URL http://ddim.co.kr/gnuboard4/adm… 2023-02-03 2023-02-15
URL http://gdtech.kr/gnuboard4/adm/… 2023-02-03 2023-02-15
URL http://ddim.co.kr/gnuboard4/adm… 2023-02-03 2023-02-15
URL http://www.hydrotec.co.kr/bbs/i… 2023-02-03 2023-02-15
URL http://gdtech.kr/gnuboard4/adm/… 2023-02-03 2023-02-15
URL http://gdtech.kr/gnuboard4/adm/… 2023-02-03 2023-02-15
DOMAIN ddim.co.kr 2023-02-03 2023-02-15
DOMAIN gdtech.kr 2023-02-03 2023-02-15

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