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

Static analysis result for SHA-256 2cf740fe002fcb52…

MALICIOUS

Office (OLE) / .DOCX

212.2 KB Created: 2020-09-21 13:01:00 Authoring application: Microsoft Office Word
MD5: 8aaa918790e65069319d9c8c7ddf9f81 SHA-1: 7f939b50756a7f297a3d1b01bdc574869caa7645 SHA-256: 2cf740fe002fcb52b76e9121ef2b1c0efad8f7829310489bf59e7a045742deb8
280 Risk Score

Malware Insights

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

The file is a Microsoft Office document containing a large VBA macro. The 'Document_Open' macro is present and configured to execute automatically upon opening the document. Heuristics indicate the use of CreateObject and GetObject, common for downloading and executing additional payloads. The ClamAV detection as 'Doc.Downloader.Generic' further supports this. No specific family could be identified, but the pattern suggests a downloader.

Heuristics 8

  • ClamAV: Doc.Downloader.Generic-9764510-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-9764510-0
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_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
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
6a026cf1bf86b484c79a559ac66211fb00449c04a88f93a009af07f69e99e193
vba-macro oletools.olevba.extract_macros (decoded VBA source) 19126 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.