Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 7aca3521bc00e841…

MALICIOUS

Office (OLE)

237.0 KB Created: 1999-03-01 02:13:00 Authoring application: Microsoft Word 8.0
MD5: d4947fa5b1b065cf9c805d113f556554 SHA-1: d1652bd6f67abc529fedf7f260c44f0141b0c479 SHA-256: 7aca3521bc00e841320b205b49e90d0adc8dc544daf58be21f0c85ab5b5b0c7c
140 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.005 Visual Basic

The sample is a Word document containing VBA macros. The macros attempt to write their own code to a file named 'c:\ethan.___' and potentially execute it. The document body presents a fake employment offer letter, suggesting a social engineering lure to encourage macro execution. The ClamAV detection further confirms its malicious nature.

Heuristics 3

  • ClamAV: Doc.Trojan.Ethan-20 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Ethan-20
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
237c8db654b7d69cf3ffbd3a2e50a64c98fa40647edea271e0e61cf5d5328891		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 6170 bytes
Detection
ClamAV: Doc.Trojan.Ethan-1
Obfuscation or payload: unlikely

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