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

Static analysis result for SHA-256 f7da42aa50eaa6a1…

MALICIOUS

Office (OLE) / .DOCX

155.8 KB Created: 2020-12-28 15:43:00 Authoring application: Microsoft Office Word
MD5: 11f0e6d911676be87bb5b43d33c94717 SHA-1: 55f5a48df2ce09b480d67bce1a2e2f82381284c8 SHA-256: f7da42aa50eaa6a1a1419b21cf703935ad48df94feaf32aa674fee1ae45d5455
280 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic for Applications T1566.001 Spearphishing Attachment T1140 Deobfuscate/Decode Files or Information

The file contains VBA macros, including an auto-executing Document_Open macro that uses CreateObject. This is a common pattern for macro-based downloaders. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may instruct the user to open a password-protected archive, a tactic often used to bypass gateway security. The ClamAV detection 'Doc.Downloader.EmotetRed02224-9938637-0' further supports the downloader classification. The obfuscated document body content is not directly indicative of the lure, but the presence of macros and the downloader heuristic strongly suggest the intent is to fetch and execute a secondary payload.

Heuristics 8

  • ClamAV: Doc.Downloader.EmotetRed02224-9938637-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.EmotetRed02224-9938637-0
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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
a004a96685dc375590aeec65acf06fce9e74ef2bbe0aa7a48bc315f9645e3700		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 6009 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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