Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 9be9362f2e5a3f46…

MALICIOUS

Office (OLE)

441.2 KB Created: 1999-12-24 16:36:33 Authoring application: Microsoft Excel
MD5: fa65a78ec82473a28682d5a1ae0072af SHA-1: b642a4639b7522bef0b4aaf5c78b871da1e46ea2 SHA-256: 9be9362f2e5a3f4674706dc2d9f41ad227667147ce7883f0d59d68f501d008e0
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.005 Visual Basic T1059.004 PowerShell T1140 Deobfuscate or Obfuscate Malicious Code

The file is an OLE document containing both VBA and XLM macros, with a Workbook_Open subroutine triggering the execution of a game-like interface. The heuristics indicate obfuscation and an appended payload, suggesting the macros are used to download and execute additional malicious content. The document body and script content describe a game, likely a lure to engage the user and bypass security measures.

Heuristics 6

  • OLE document has large unaccounted-for region high OLE_SLACK_ANOMALY
    OLE file is 451,769 bytes but its declared streams total only 184,311 bytes — 267,458 bytes (59%) live in unallocated sector slack. This is the canonical hiding place for pre-macro-era Office exploit payloads (XOR-encoded shellcode reached via a parser pointer-corruption bug in the document structure).
  • OLE file has appended executable-looking payload bytes high OLE_APPENDED_PAYLOAD
    OLE compound file contains a large high-entropy region beyond the declared major streams and that region includes shellcode, PE, or loader API markers. This is a payload-carrier signal, not a specific CVE attribution by itself.
  • Workbook_Open macro high OLE_VBA_WBOPEN
    Workbook_Open macro
  • 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.
  • Excel 4.0 (XLM) macro sheet present medium OLE_XLM_AUTOOPEN
    Workbook contains an Excel 4.0 macro sheet sub-stream — XLM is rarely seen in modern legitimate workbooks and was a major Office malware vector during 2020-2022.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
c2d076a6e609a8b33579240c4c97ddb741702fb224c691665176231441d0ac2f		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 17509 bytes
macros.bas
b4fd638e0ccb2c80415096242ba70596d961da2b643d38a3cabf0238dd3e4d99		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 27429 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 30 Chr/ChrW string-construction calls.

Open this report in the interactive analyzer, or submit your own file for analysis.