국세청을 사칭한 악성 LNK 유포

2023-09-14 Ahnlab Spreading of malicious LNK impersonating the National Tax Service

https://asec.ahnlab.com/ko/57088/

Thumbnail for 국세청을 사칭한 악성 LNK 유포

AhnLab ASEC observed malicious LNK files distributed to South Korean users under a National Tax Service tax-explanation theme. The suspected email-delivered ZIP downloaded from file.gdrive001.com contained a large dummy-padded LNK that ran PowerShell, opened a decoy HWP document, unpacked scripts under Public, and registered start.vbs for RunKey persistence. The script chain collected user information, uploaded it to filehost001.com, and attempted to download ZIP and CAB payloads for execution with rundll32 and batch scripts. ASEC said its infrastructure ultimately identified Qasar RAT and Amadey as final malware, while noting the attacker appeared to keep the malicious download available only briefly to hinder analysis.

Indicators of Compromise

Type Value First Seen Last Seen
URL https://file.gdrive001.com/read… 2023-09-14 2023-11-24
DOMAIN file.gdrive001.com 2023-09-14 2023-11-24
HASH 560e5977e5e5ce077adc9478cd93c2ac 2023-09-14 2023-09-21
HASH 9c3eef28b4418c40a7071ddcba17f0e8 2023-09-14 2023-09-21
HASH 2d0747533d4d3f138481c4c4cda9ea1e 2023-09-14 2023-09-21
HASH ca11ba5e641156ff72400e7f5e103aee 2023-09-14 2023-09-21
HASH b5f698fb96835d155fbcc1ccd4f4b520 2023-09-14 2023-09-21
HASH 7725d117d0bd0a7a5fb8ef101b019415 2023-09-14 2023-09-21
HASH 20f0e8362782c7451993e579336f2f3e 2023-09-14 2023-09-21
URL http://filehost001.com/upload.p… 2023-09-14 2023-09-21
URL https://file.gdrive001.com/read… 2023-09-14 2023-09-21
URL http://filehost001.com/list.php… 2023-09-14 2023-09-21
DOMAIN filehost001.com 2023-09-14 2023-09-21

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