Rewterz Threat Alert – HawkEye Infostealer – Active IOCs

Severity

Medium

Analysis Summary

HawkEye, primarily an infostealer, has additional capabilities such as bypassing of AV systems and keylogging. A spear-phishing campaign is detected using malicious RTF documents sent via corona-themed emails to distribute the HawkEye keylogger. While most malicious RTF documents use exploits to trigger Object Linking and Embedding (OLE) calls, in this case, the documents use the \objupdate switch. A victim would need to enable macros for the infection process to begin. The embedded OLE objects, five of them in this case, appear to be macro-enabled Excel sheets. PowerShell is used to execute .NET code which downloads and executes the Hawkeye payload.

Impact

• Information Theft
• Credential Theft
• Antivirus Bypass

Indicators of Compromise

MD5

• 0dee340de65b6a7a203f99e9242c3374
• aed6e51bb9085d4a96e158ad8a08b7a0
• 59c041a25991a695120e83e388d73a4c

SHA-256

• 31248b5640e4c711934b88fbdb774545469256f08156ea098c2ad5f037ad1da2
• 5655b621a726c37bf8ac0e284fd58a445f2afde07eec44b5f522e4e150df20c0
• 3d8df9956f5077318ca73139f25bddee4fc699882d9cc66adb05380f3ccaa0d9

SHA-1

• 74c6f66ec38465e07aa179eed8a9595de3214e59
• 890774f50e34bf562a7a0b8d10f5f197d8be9d9a
• 8dd06b6f84e0d89400a732628199848c57951949

Remediation

• Search for IOCs in your environment.
• Block all threat indications at their respective controls.