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

Static analysis result for SHA-256 be7313db070f122c…

MALICIOUS

Office (OLE) / .EXE

34.0 KB Created: 1999-09-06 06:55:47 Authoring application: Microsoft Excel
MD5: 82180b0e4081e3ad2b38c3eb13f6bcbe SHA-1: e3aa1e0b9fc6fad5f3c857022597ffadbf1a4950 SHA-256: be7313db070f122ccf63b5759d687bb26c50914ecbb2bdf2082a659ed34ded85
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, with a high-confidence Workbook_Open auto-execution heuristic firing. The presence of CreateObject and GetObject calls within the VBA code suggests the execution of arbitrary commands or the loading of external components. ClamAV detections for Win.Trojan.Tristate-2 and Doc.Trojan.Tristate-1 further confirm its malicious nature. The Workbook_Open macro is likely designed to download and execute a second-stage 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
e4b5482f95378f5f8d79b0d3e466a815945a8063fb4570ce089a647466e15ef5		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 10442 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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