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 a2e6e833947a1d5c526c0c2d6943e35… 2023-02-03 2023-10-30
DOMAIN jooshineng.com 2023-02-03 2023-10-30
HASH ee3bd0aeb1d27bea0958399f64b9074… 2023-02-03 2023-02-15
HASH 486b279a9988871c329e2bbe14328f3… 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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