Office (OLE) / .DOCX malware analysis — malicious · 4a1656e05641ecf3

MALICIOUS

Office (OLE) / .DOCX

156.3 KB Created: 2020-10-19 16:24:00 Authoring application: Microsoft Office Word

MD5: db90a850b32706061685ccec05939234 SHA-1: b9111eef2055dd0b79595046a88eec4857c536c9 SHA-256: 4a1656e05641ecf363b724ae37a92d0ca73aed83f75f0a1b62ef1c90fa1560c1

240 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The sample contains VBA macros, specifically a Document_Open auto-execution macro, which is a common technique for initial execution. The critical ClamAV detection and high-severity heuristics indicate malicious intent. The presence of the 'macros.bas' artifact further supports the macro-based execution. The document body appears to be heavily obfuscated or corrupted, preventing a clear understanding of its lure, but the VBA execution is sufficient to infer a downloader or dropper functionality.

Heuristics 7

ClamAV: Doc.Malware.Sagent-9780539-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Sagent-9780539-0
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.
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.

Filename	Kind	Source	Size
`macros.bas` `d0a6497cb07b10e3700967f3bfacfd7398ab919e1393e4e1ddda61d0b30c3f61`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	15475 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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