Office (OLE) / .DOCX malware analysis — malicious · b740187c22ed9782

MALICIOUS

Office (OLE) / .DOCX

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

MD5: 1a8c73b0c03ed69119dc4613a8a0f10b SHA-1: 44b675b0291e73504e05a64874312834084a50b9 SHA-256: b740187c22ed9782ff2ccdb6d2eb79b1737c7edd5e7882c27d26f777928fc40d

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 execute code upon opening the document. The critical ClamAV detection and high-severity heuristics indicate malicious intent. The Document_Open macro likely uses CreateObject to download and execute a second-stage payload, as suggested by the 'OLE_VBA_PCODE_AUTOEXEC_EXEC' firing. 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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