Office (OLE) / .DOCX malware analysis — malicious · 41d9101a9835faaf

MALICIOUS

Office (OLE) / .DOCX

157.9 KB Created: 2020-10-19 11:46:00 Authoring application: Microsoft Office Word

MD5: 41159174d5c39adc4dcfcfea7029fda8 SHA-1: e47cd51829d55043cfb4ad6ef17c34200d6e2391 SHA-256: 41d9101a9835faaf362375ab98bd7fe90f00dff615874def1d8d228c12d71348

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-exec macro, which is designed to run automatically when the document is opened. This macro uses CreateObject, indicating it's likely attempting to download and execute a second-stage payload. The ClamAV detection of 'Doc.Trojan.Agent-9780503-0' further confirms its malicious nature. No specific family could be identified, but the behavior is consistent with a macro-based downloader.

Heuristics 7

ClamAV: Doc.Trojan.Agent-9780503-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Trojan.Agent-9780503-0
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` `df3f11a486897c7a189da6e4d0ac7fa240cbe9ec205152865e455c6dee8f09c5`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	15642 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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