Office (OLE) / .DOCX malware analysis — malicious · 8aa24411bdaffb0e

MALICIOUS

Office (OLE) / .DOCX

193.1 KB Created: 2020-09-18 12:16:00 Authoring application: Microsoft Office Word

MD5: 58139f420eaba482ee130c217362ec3c SHA-1: 458641bcf36a6d806768e8e2b203e5e114119e3d SHA-256: 8aa24411bdaffb0e3f3408c2227368bc0ac2aa1c636706dff2a5b9254ac61487

240 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample is a Microsoft Office document with a high-confidence detection for VBA macros. Specifically, the 'Document_Open' macro is present and configured to execute automatically. This macro utilizes 'CreateObject' and is flagged for p-code auto-execution, indicating it's designed to perform actions upon opening. The presence of 'macros.bas' further supports the macro-based execution. The primary function appears to be downloading and executing a secondary payload, consistent with a downloader malware.

Heuristics 7

ClamAV: Doc.Downloader.Generic-9763532-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Generic-9763532-0
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` `ba8241e4388725ade491e6e42da3e5f9cf169555b4f6e61ff9f624691af3445f`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	20213 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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