Office (OLE) / .DOCX malware analysis — malicious · f57bae29b433bbff

MALICIOUS

Office (OLE) / .DOCX

153.6 KB Created: 2020-09-24 05:47:00 Authoring application: Microsoft Office Word

MD5: 450779546064e1060147ee9f5eacd94b SHA-1: d50d17f8dff0d5ca003a81544425764566ce2bff SHA-256: f57bae29b433bbff72dfe50e3dda325580fedc58d7c032948cf5360ce803b390

240 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.005 Visual Basic

The sample is a malicious DOCX file containing VBA macros. The 'Document_Open' macro is configured to execute a PowerShell command, as indicated by the 'OLE_VBA_PCODE_AUTOEXEC_EXEC' and 'OLE_VBA_CREATEOBJ' heuristics. The extracted document body appears to be obfuscated or corrupted, but the presence of VBA macros and the specific heuristics strongly suggest an intent to download and execute a second-stage payload. The ClamAV detection further supports the malicious classification.

Heuristics 7

ClamAV: Doc.Trojan.Agent-9765752-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Trojan.Agent-9765752-0
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` `b0798fb7450882311ba60b57e039433588cb794c6cc8a10f75d1de73c5c7973a`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	19490 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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