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

Static analysis result for SHA-256 904cd94d39f37ee5…

MALICIOUS

Office (OLE) / .EXE

51.0 KB Created: 1998-07-20 11:43:00 Authoring application: Microsoft Word 8.0
MD5: a1567c565171fc41494cd49be7cfb6a3 SHA-1: a32fe4c615ac4bf84ec1d4dd4545372c50de8b24 SHA-256: 904cd94d39f37ee5afd097786b750986b1e719cf3d3c7d5a5fff7d8e802494e5
360 Risk Score

Malware Insights

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

The file is an OLE document containing VBA macros, with critical heuristics indicating the use of Shell() for execution and auto-execution routines like AutoOpen. ClamAV detections for 'Win.Trojan.Pivis-2' and an extracted artifact 'Doc.Trojan.VMPCK1-11' strongly suggest malicious intent. The VBA macros are likely responsible for downloading and executing a secondary payload, as indicated by the 'OLE_VBA_SHELL' and 'OLE_VBA_PCODE_AUTOEXEC_EXEC' firings.

Heuristics 8

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • ClamAV: Win.Trojan.Pivis-2 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Pivis-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.
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • Auto_Close macro high OLE_VBA_AUTOCLOSE
    Auto_Close macro
  • 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
369d38ad4000f7c746aae64f92783d9687beca293726f9a6ae96cd6044eaa5d7		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 25843 bytes
Detection
ClamAV: Doc.Trojan.VMPCK1-11
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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