Office (OLE) / .DOCX malware analysis — malicious · cef0a21256e2c9bb

MALICIOUS

Office (OLE) / .DOCX

159.0 KB Created: 2020-09-23 21:57:00 Authoring application: Microsoft Office Word

MD5: 4587fbf7ca13256c6c5af0d73e5b0d2d SHA-1: 8b7615d14b88ca905430641653ad541c0fd09e50 SHA-256: cef0a21256e2c9bb654f4f7fd0454fc6dc1795f3aa95862003eaa9e5c144ab42

240 Risk Score

Malware Insights

MITRE ATT&CK

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

The file is a malicious DOCX document containing VBA macros. The 'Document_Open' macro is configured to auto-execute, and heuristics indicate it uses 'CreateObject' to likely download and execute a second-stage payload. The ClamAV detection name 'Doc.Downloader.Mryv-9765643-0' further supports this downloader behavior. No specific family could be identified.

Heuristics 7

ClamAV: Doc.Downloader.Mryv-9765643-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Mryv-9765643-0
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` `d7dd2a73d7d39dc729b85cfde71706f8b2534ea5cd633d43e9c623fb8097a814`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	20294 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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