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

Static analysis result for SHA-256 2cfb44296cdcf5ff…

MALICIOUS

Office (OLE) / .EXE

50.5 KB Created: 1999-09-06 05:55:00 Authoring application: Microsoft Word 8.0
MD5: 5416ac66643a2d2e8bca4b85c2c50824 SHA-1: cf5d8508c538538ba43f7d5e01eb7b3171a25266 SHA-256: 2cfb44296cdcf5ff0bb7d998ed19dd24ef4d7e801d6996243213fa624d7291c3
340 Risk Score

Malware Insights

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

The file contains VBA macros, specifically a Workbook_Open macro, which is a common technique for executing malicious code automatically when the document is opened. The ClamAV detection of 'Win.Trojan.Tristate-2' and 'Doc.Trojan.Tristate-1' strongly indicates malicious intent. The presence of VBA macros and the auto-execution trigger suggest the file is designed to download and execute a secondary payload.

Heuristics 8

  • 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.
  • Workbook_Open macro high OLE_VBA_WBOPEN
    Workbook_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • 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
1f14d3addbe6783ee88c0046c41ec87f9212a45be144444216d91c1cb9132484		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 9636 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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