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

• 8826f2195559eaac97acd1806bd19044
• 38ff1032b0bcfc6dc30f63749d379022

SHA-256

• fc218ee6d2ebace3f7d764b427db2ade46447783260cad5ede4211f68cf32a04
• ddad4e4e91bdcf7d47f2d11d9886fb66083e38b7213551c5d2b3ec17cdb84b38

SHA-1

• 9fd7479a7e56314fe808a97657454ccdf984d722
• 6cf99fcd0d1c484828fcff3cc976113ee016e27b

Remediation

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