ClickFix 방식으로 배포되는 라자루스(Lazarus)의 악성코드 분석 보고서_2편

2025-02-12 Nurilab Analysis of Lazarus Malware Distributed via the ClickFix Technique, Part 2

https://blog.naver.com/nurilab1/223758209997

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The second Nurilab analysis continues the Lazarus ClickFix malware chain and focuses on the final C# binary, Tvooly.exe, produced after seven stages of de-obfuscation, decryption, and C2 communication. Tvooly.exe uses obfuscation, AES-based resource decryption, dynamic intermediate-language generation, and base64-encoded C2 responses that are decoded and decrypted before use. The report also notes communication with multiple C2 domains and IPs, including node02-prefixed infrastructure, and describes polymorphic dropped executables in the Temp directory.

Indicators of Compromise

Type Value First Seen Last Seen
DOMAIN a104-75-33-105.deploy.static.ak… 2025-02-12 2025-02-12
DOMAIN maui.com 2025-02-12 2025-02-12
DOMAIN node02-windows-grupodw.asplhost… 2025-02-12 2025-02-12
IPv4 104.21.36.55 2025-02-12 2025-02-12
IPv4 172.67.185.240 2025-02-12 2025-02-12

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