Office (OLE) / .DOCX malware analysis — malicious · c63f6783c00a837e

MALICIOUS

Office (OLE) / .DOCX

176.2 KB Created: 2020-09-17 20:07:00 Authoring application: Microsoft Office Word

MD5: ef545f8504e369d230e32796b1a2e623 SHA-1: 68dc07c72e383b646e26424fac6427595be526cd SHA-256: c63f6783c00a837e235c2c2405fccfe135bf4358704dad7525b4660588e6ed3a

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. This macro utilizes CreateObject, indicating it's designed to download and execute a second-stage payload. The ClamAV detection name 'Doc.Downloader.Generic-9763054-0' further supports this downloader functionality. No specific family could be identified, but the technique is common for initial access.

Heuristics 7

ClamAV: Doc.Downloader.Generic-9763054-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Generic-9763054-0
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` `620e9eb15c32ed012e3e43742d6a5833fa906ea09e2bf7ca9f4f384d7210c8d6`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	21992 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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