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

• de8a8f710f5bfdacbc1843b997741b86

SHA-256

• f97f876b529e2569d80b1190a249088582117b29aef9af9d8a0e992c2df2db2d

SHA-1

• 3abf5d61febd54753055bb2707853ea2eace025a

Remediation

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