Office (OLE) / .DOCX malware analysis — malicious · 4b4b26aeed40ceb7

MALICIOUS

Office (OLE) / .DOCX

158.7 KB Created: 2020-12-29 13:14:00 Authoring application: Microsoft Office Word

MD5: 3c5b73267901eab9fa68d9a17ef3f25c SHA-1: ccf4aefc97fc907fccbbfb8b452c4d7096f766da SHA-256: 4b4b26aeed40ceb7e56e6e67e73f85bb0bbc00b2a911ef3a11bedd4a5798c462

240 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.005 Visual Basic

The critical ClamAV detection and high-severity heuristics for VBA macros, specifically an auto-executing Document_Open macro that uses CreateObject, indicate a downloader. The presence of VBA macros and the Document_Open auto-execution strongly suggest the intent is to download and execute a second-stage payload. The document body content is heavily obfuscated and unreadable.

Heuristics 7

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.
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` `f0a26dbda37cee5a9e56f370f4faad071837ea1fd898646f154d0f1b66a66162`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	8375 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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