Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 0805791c6731da10…

MALICIOUS

Office (OLE)

33.5 KB Created: 2010-03-01 19:45:00 Authoring application: Microsoft Word 11.5.5
MD5: db395fac8c2cc173b2632cc1a06600c6 SHA-1: 0f0ce27d7682a3cc7956eff1fec2cca4f97a3ccb SHA-256: 0805791c6731da106920f9ca465e8ecbf4a9fd7a731118de2e03777e59693551
180 Risk Score

Malware Insights

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

The sample contains a VBA macro that is triggered by the Document_Open event, indicating an attempt to execute malicious code upon opening. The macro appears to be designed to infect the system, as suggested by the ClamAV detection 'Doc.Trojan.Thus-8'. The macro's logic involves manipulating NormalTemplate and ActiveDocument VBProjects, likely to ensure persistence or spread.

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
6b876980ed04b190bff869d86601babbb55082c385814b71d37616e76829b2eb		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2400 bytes
Detection
ClamAV: Doc.Trojan.Thus-8
Obfuscation or payload: unlikely

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