Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 81ec1a02ad64e3f0…

MALICIOUS

Office (OLE)

32.5 KB Created: 2007-11-20 17:34:00 Authoring application: Microsoft Word 10.0
MD5: d908bef5668cf06e2050744959d26be9 SHA-1: 441d0a44dc1466072de24d85de56d21493b2fa85 SHA-256: 81ec1a02ad64e3f0a2543f0821ab629f19d3710901dfedb22c6f64347af87fe3
180 Risk Score

Malware Insights

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

The file contains a critical heuristic firing for OLE_VBA_DOCOPEN, indicating a Document_Open macro was present. This macro is designed to execute automatically when the document is opened. The VBA code appears to be obfuscated but its intent is to modify the document's code, a common technique for downloading and executing further malicious content. The ClamAV detection 'Doc.Trojan.Strings-1' further supports the malicious nature of the file.

Heuristics 4

  • ClamAV: Doc.Trojan.Strings-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Strings-1
  • 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
bb3fdd3d064cdcf6a4f7e8ac833ee1d18b8cc1270816d75b45c36fc78384837d		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 909 bytes
Detection
ClamAV: Doc.Trojan.Strings-1
Obfuscation or payload: unlikely

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