Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 ffacd2c129b63113…

MALICIOUS

Office (OLE)

65.5 KB Created: 2005-06-16 08:58:00 Authoring application: Microsoft Word 11.0
MD5: 70b3cac92abece5ccbeeeb3d13d4fb9c SHA-1: 65b5fbb7ee94cfd72018f78376f5ad170255bcc5 SHA-256: ffacd2c129b63113318b7e4b38d281f1263ba1a0c76f84f23bffd9b4f7c176df
240 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.003 Windows Command Shell

The file is identified as malicious by ClamAV with multiple critical heuristic firings, including the presence of VBA macros and the use of the Shell() function. The extracted 'macros.bas' file likely contains the malicious VBA code. The Shell() function is commonly used to download and execute additional payloads, indicating a downloader or droppper functionality. The document body content appears to be unrelated recipe text, suggesting it's a lure.

Heuristics 5

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • ClamAV: Doc.Trojan.Marker-31 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Marker-31
  • 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.
  • Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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
7a12cec1135aced8e00ad59361853e7fafcc466e3e26af08cca120d6ba9a88c8		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 6005 bytes
Detection
ClamAV: Doc.Trojan.Marker-3
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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