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

Static analysis result for SHA-256 a97b95012cf18e7b…

MALICIOUS

Office (OLE) / .EXE

30.0 KB Created: 1998-08-15 17:26:42 Authoring application: Microsoft Excel
MD5: e18169978471b6ecdc8660a45a846755 SHA-1: 9a653971e43079809b4bd82e6943fbfc725165f5 SHA-256: a97b95012cf18e7bd680a54c1b2ee51497984343328b5a5c0dcf893d68701a78
340 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The file is an Excel OLE object containing VBA macros. A critical heuristic indicates it is detected as Win.Trojan.Tristate-2 by ClamAV. The Workbook_Open macro is present and configured to execute VBA p-code, specifically using CreateObject. This suggests the macro is designed to download and execute a second-stage payload. No specific URLs or further IOCs were extracted from the static analysis.

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
6c6cbb753d24dc096d19e90c63968df2e670882977ae3c5201d21238a32cc183		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 10550 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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