성범죄자 고지 정보를 위장한 Kimsuky 공격

2025-09-18 Logpresso Kimsuky Attack Disguised as Sex Offender Notification Information

https://logpresso.com/ko/blog/2025-09-18-Kimsuky-Attack

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Logpresso attributes a July 2025 LNK-based intrusion to North Korea-linked Kimsuky, using decoy archives themed around sex offender notification and tax notice documents. The infection chain launches mshta.exe from a disguised shortcut, retrieves encrypted payloads from remote infrastructure, decrypts ZIP content with hardcoded AES material, and runs PowerShell and VBS components from the user profile. The malware collects system information, recent files, browser data, wallet extension artifacts, NPKI/GPKI certificate stores, keylogs, clipboard data, and matching document or wallet-related files before encrypting and chunking uploads to C2. It maintains persistence through a Run registry entry, avoids virtualized environments, polls C2 for upload, download, command execution, and DLL execution tasks, and references infrastructure including mailhubsec.com subdomains and 142.11.248.98. The findings matter because the campaign combines familiar Kimsuky social engineering with credential, certificate, browser, wallet, and file theft capabilities against Korean users.

Indicators of Compromise

Type Value First Seen Last Seen
HASH 1a2164d9fea343bd5a5fc31a0849bb6e 2025-09-18 2026-01-14
HASH 03794685a12ce0dd7b69e70ced8568f9 2025-09-18 2026-01-14
HASH 092c2607c9f60360bac8eb22059ac51… 2025-09-18 2026-01-14
HASH 206f30e074f46df4f6f18824c09b8b8… 2025-09-18 2026-01-14
HASH 373fce7c6fa68ad9afa22bcbf8c15f5d 2025-09-18 2026-01-14
HASH 1b1431e7f18038103235558d4461bb3… 2025-09-18 2026-01-14
HASH 941ac1e6728aab61a303e0f8e7ef815… 2025-09-18 2026-01-14
HASH 345de053580a242fe9559b2c4e6f5b5… 2025-09-18 2026-01-14
HASH cecfa6dce05f3a71923fd0ffa6e1ef4… 2025-09-18 2026-01-14
HASH ff188b008bed743a8e899b0d69a4e1d… 2025-09-18 2026-01-14
HASH d4a63c97ade3bcca8913f50bc1b130f… 2025-09-18 2026-01-14
HASH 6730d86c8e24e0c2ae0bb1fb65d15b5… 2025-09-18 2026-01-14
HASH 1f34b194259beb09bd8812313880aa3… 2025-09-18 2026-01-14
HASH 64b48a4b186301cd18045126cf87343… 2025-09-18 2026-01-14
HASH 677e77265c7ba52e825fc62023942213 2025-09-18 2026-01-14
HASH 748b45f59a2b02f41d001f2d71dea9a… 2025-09-18 2026-01-14
HASH 1d01eab612da7d635e6b92395ead126… 2025-09-18 2026-01-14
HASH 0ff0ca772477fe4558bd75c1471b9e9… 2025-09-18 2026-01-14
HASH 6d9854b69ce9cdee79b723bc7632eeb… 2025-09-18 2026-01-14
HASH c24353e61826eb7187d1acabbd857dd… 2025-09-18 2026-01-14
HASH 746249913d1f6e944fe1a70ea1b3684… 2025-09-18 2026-01-14
HASH 4739393bd6dd1d938dc1dc3ee7e9e06… 2025-09-18 2026-01-14
HASH 7a1577516f7b8c45c92f65bb458c9e4… 2025-09-18 2026-01-14
HASH cb9c24ee556d0aabdcaaedbcd5dd8e6… 2025-09-18 2026-01-14
URL https://yajxu.mailhubsec.com/ 2025-09-18 2026-01-14
DOMAIN yajxu.mailhubsec.com 2025-09-18 2026-01-14
DOMAIN yfews.mailhubsec.com 2025-09-18 2026-01-14
IPv4 142.11.248.98 2025-09-18 2026-01-14
URL https://yfews.mailhubsec.com/co… 2025-09-18 2025-09-22

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