Malicious Office (OLE) / .DOC — malware analysis report

Static analysis result for SHA-256 fed99e693b063d36…

MALICIOUS

Office (OLE) / .DOC

80.0 KB Created: 1999-12-23 23:55:00 Authoring application: Microsoft Word 8.0
MD5: bba5df30b2b9eff4c041832e057b1e99 SHA-1: 7877987544462d8d0c26e5786ba0d2d2816aa284 SHA-256: fed99e693b063d36243f22e68e97dc7851ba46daecd5ac72bdc8d70d92967968
240 Risk Score

Malware Insights

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

The sample is a Microsoft Word document containing VBA macros. A critical heuristic indicates the presence of a Shell() call within the VBA code, which is commonly used to execute arbitrary commands. This suggests the macro is designed to download and execute a second-stage payload. ClamAV detections further confirm the malicious nature of the file.

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
071a9f19551bb2aa5057e8ff5ecd260812be1e13856af7012b0e3463aa2c8035		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 21187 bytes
Detection
ClamAV: Doc.Trojan.Marker-1
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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