Office (OLE) / .DOCX malware analysis — malicious · 52c2ea9f0c445687

MALICIOUS

Office (OLE) / .DOCX

164.3 KB Created: 2020-10-20 08:13:00 Authoring application: Microsoft Office Word

MD5: 5b542d8fdf006cef01dbfe1568e01e2e SHA-1: ab269cacf33fec73c4222e11f31bbfbae8b7c2f1 SHA-256: 52c2ea9f0c4456872b85725899fd0c9fbabe6b2e07c4a8db19edcd797603c46f

240 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample contains a VBA macro that automatically executes upon opening the document, as indicated by the Document_Open and OLE_VBA_PCODE_AUTOEXEC_EXEC heuristics. This macro utilizes CreateObject, a common technique for launching malicious payloads. The ClamAV detection further confirms its malicious nature. The primary IOC is the extracted VBA macro file, 'macros.bas', which is responsible for the execution.

Heuristics 7

ClamAV: Doc.Trojan.Agent-9781037-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Trojan.Agent-9781037-0
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` `8eb6ba0866f4c6c9ad4d97b0723246709e3ca63ed0491e35acc3191e90884d63`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	17541 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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