Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 236bec60274ff185…

MALICIOUS

Office (OLE)

42.5 KB Created: 2000-04-04 06:24:00 Authoring application: Microsoft Word 8.0
MD5: 4bde8a0865b5ce07132bb68d2138c71e SHA-1: dc0eac3d75bbcff1fe4decb4c194bde964b74dbf SHA-256: 236bec60274ff185a9a05764f43f9e0f5d277806cb84f0ba921a82b7ec148753
260 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File T1140 Deobfuscate or Obfuscate Malicious Files or Information

The file is identified as malicious by ClamAV with the signature Win.Trojan.Tristate-2. Static analysis detected VBA macros, including CreateObject and GetObject calls, and obfuscated strings, indicating an attempt to hide malicious activity. The presence of these indicators suggests the macros are likely designed to download and execute a secondary payload. The document body itself appears to be legitimate school admission information, serving as a lure.

Heuristics 6

  • ClamAV: Win.Trojan.Tristate-2 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Tristate-2
  • 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.
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
  • 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
28bddf8ef6f90abb80f9eefe64649ae18587fde0fa3bc3c18e805821819aaf91		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 9421 bytes
Detection
ClamAV: Doc.Trojan.Tristate-1
Obfuscation or payload: likely
Carved artifact contains 12 Chr/ChrW string-construction calls. Carved macro source contains an auto-exec entry point and execution/download terms.

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