Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 cba8e859846d5a1f…

MALICIOUS

Office (OLE)

89.0 KB Created: 2010-01-07 21:25:00 Authoring application: Microsoft Word 11.5.3
MD5: 98e49a1c028ad3e9a3189fd7f4ab508b SHA-1: 20f843e670e39220d299d9a4d06525e77060cf53 SHA-256: cba8e859846d5a1fb5061bdd733707ee18d762a4104b67b607feda310161a6c0
180 Risk Score

Malware Insights

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

The file is a Microsoft Word document containing VBA macros, specifically a Document_Open macro, which is a common technique for executing malicious code upon opening. The document body presents a plausible academic project assignment to entice the user to enable macros. The presence of a Document_Open macro strongly suggests the intent is to execute malicious code automatically, likely to download and run a secondary payload. The ClamAV detection as 'Doc.Trojan.Thus-8' further confirms its malicious nature.

Heuristics 4

  • ClamAV: Doc.Trojan.Thus-8 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Thus-8
  • 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.
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • 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
90ce42962075fb537f7475542da7b4ee2c504ac1209ee30c080b5bb4fd4df4f6		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2368 bytes
Detection
ClamAV: Doc.Trojan.Thus-8
Obfuscation or payload: unlikely

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