Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 dd08ac1f206374d1…

MALICIOUS

Office (OLE)

68.5 KB Created: 1999-07-25 08:59:00 Authoring application: Microsoft Word 8.0
MD5: 6c9ffbb9ed9d87b1b663545a0c331fed SHA-1: 2f7433acc20c80b5850ca2ee6b98034f3ee49215 SHA-256: dd08ac1f206374d13bd2750686b9c67f16c51117b1508eff054d392858422ea8
220 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample is a Microsoft Word document containing VBA macros, including AutoOpen and Auto_Close functions, which are commonly used to execute malicious code upon opening or closing the document. ClamAV detections indicate it is a known trojan. The document body contains a lesson plan for automotive engine repair, which appears to be a lure to disguise the malicious intent of the embedded macros. No specific malware family could be identified.

Heuristics 5

  • ClamAV: Doc.Trojan.Class-37 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Class-37
  • 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.
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • Auto_Close macro high OLE_VBA_AUTOCLOSE
    Auto_Close 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
e5c057db4b1b71b0ae3981012788d74eebc9b758b7b9035670179c1911514af8		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 17478 bytes
Detection
ClamAV: Doc.Trojan.Class-5
Obfuscation or payload: unlikely

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