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

Static analysis result for SHA-256 b70df1235b2d8668…

MALICIOUS

Office (OLE) / .DOCX

51.0 KB Created: 1999-10-23 21:12:00 Authoring application: Microsoft Word 8.0
MD5: 20c1a1afe8c4058ee799e4639e75be5f SHA-1: 75ad210c460566d8c509bae6068fa3d5fcedb8df SHA-256: b70df1235b2d86683876ca9f121d7825ebb1e61d23b4c771566004a0a90ed62c
260 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1059.005 Visual Basic

The sample is a malicious DOCX file containing VBA macros. The heuristics indicate the presence of VBA macros and a call to CreateObject, along with a reference to Windows Script Host. The extracted VBA macro code, though truncated, explicitly references 'Wscript.ScriptFullName' and attempts to find and process HTML or VBS files. This suggests the macro's purpose is to execute a script, likely for malicious purposes. The ClamAV detections further confirm its malicious nature.

Heuristics 6

  • ClamAV: Doc.Trojan.Hopper-4 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Hopper-4
  • 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.
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • 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
7fc29dfa19a353d956d717f9911096cffd7a318cf9a041c8336622f9ebc44600		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 19257 bytes
Detection
ClamAV: Win.Trojan.Internal-7
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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