Office (OLE) / .DOCX malware analysis — malicious · 441c6829aa2af5de

MALICIOUS

Office (OLE) / .DOCX

158.5 KB Created: 2020-09-17 16:56:00 Authoring application: Microsoft Office Word

MD5: 5452571fca3f03c912b35168b83f29a1 SHA-1: cc103e0ef195c388dd5182b93fac708f7186db50 SHA-256: 441c6829aa2af5dee07e2ffa564ee1975921cbb52ee8950407ee26fa2389347f

240 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1059.001 PowerShell

The sample is a Microsoft Office document containing a malicious VBA macro, specifically triggered by the Document_Open auto-execution event. The macro utilizes CreateObject to execute arbitrary code, a common technique for downloading and running second-stage payloads. ClamAV detection confirms its malicious nature as a downloader. The presence of VBA macros and the auto-execution event strongly suggest a spearphishing attachment attack vector.

Heuristics 7

ClamAV: Doc.Downloader.Generic-9763026-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Generic-9763026-0
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` `d72f45ff27ad6de46c4e2f18d1cb6c13c4a0c6682629fccb5d0be1c4ab69db7a`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	19870 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 20 long base64-like blob(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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