Office (OLE) / .DOCX malware analysis — malicious · b842862b97e1bb3b

MALICIOUS

Office (OLE) / .DOCX

154.8 KB Created: 2020-09-14 22:09:00 Authoring application: Microsoft Office Word

MD5: e02bf6432715ac4579c3a1a1707c2f1d SHA-1: 184858bd6fe97474598c70663cab165987260f79 SHA-256: b842862b97e1bb3bf480e0edfa445124eb165f8b8c6208cdc3b40a25acd5c103

240 Risk Score

Malware Insights

MITRE ATT&CK

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

The file is a Microsoft Office document containing VBA macros, specifically a Document_Open macro that uses CreateObject to execute code. The presence of the 'macros.bas' artifact and the 'OLE_VBA_PCODE_AUTOEXEC_EXEC' heuristic strongly indicate that the VBA code is designed to run automatically upon opening the document. The heuristic 'OLE_VBA_CREATEOBJ' suggests the macro attempts to instantiate objects to perform malicious actions, likely downloading and executing a second-stage payload. The ClamAV detection further confirms its malicious nature.

Heuristics 7

ClamAV: Doc.Malware.Generic-9760527-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Generic-9760527-0
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` `bf2dc6e4793502154f28a14458af4f5198ccc48932a5641a4c34f7f1fcdc0c82`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	18582 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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