Win.Trojan.Tristate-2 — Office (OLE) malware analysis

Static analysis result for SHA-256 4db127ab1400d754…

MALICIOUS

Office (OLE)

44.0 KB Created: 2000-03-02 12:54:00 Authoring application: Microsoft Word 8.0
MD5: 9218e47f24b95a3dd15bce377fb18611 SHA-1: d9cadd16c2eb42fee78e4164421f581d35932987 SHA-256: 4db127ab1400d754194391faf3ed65515f2d2e99f5af43c5f5090e7d482f18de
260 Risk Score

Malware Insights

Win.Trojan.Tristate-2 · confidence 95%

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

The file is identified as Win.Trojan.Tristate-2 by ClamAV, indicating a known malicious trojan. Static analysis detected VBA macros, including CreateObject and GetObject calls, and obfuscated strings within the macro code. The document body mimics official Workers' Compensation information to deceive the user into interacting with the malicious content. The presence of the 'macros.bas' file further supports the macro-based execution vector.

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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