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

Static analysis result for SHA-256 c74d9dd73470acf6…

MALICIOUS

Office (OLE) / .DOCX

217.2 KB Created: 2020-09-21 20:39:00 Authoring application: Microsoft Office Word
MD5: 6b4bc1da5beb3e3b7849fe3dc2f9d04c SHA-1: 36ec80cdc898313cf64293cadaf5ed6f1e35b9d0 SHA-256: c74d9dd73470acf660bc458fed146e653197422214956ce6dc4abfaa8a8a1544
280 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The file is a Microsoft Office document containing VBA macros, as indicated by multiple OLE_VBA heuristics. The presence of a Document_Open macro and CreateObject/GetObject calls suggests that the macros are designed to execute automatically. The ClamAV detection as 'Doc.Downloader.Generic' strongly implies that the primary function of these macros is to download and execute a second-stage payload. No specific malware family could be identified.

Heuristics 8

  • ClamAV: Doc.Downloader.Generic-9764666-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-9764666-0
  • 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
6d2f50f334b8e082813c694e310720d341c184a4af51360bc43b61318b8ab2c5		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 19051 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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