Office (OLE) / .DOCX malware analysis — malicious · 920a37f8de42e9c6

MALICIOUS

Office (OLE) / .DOCX

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

MD5: 4541b09ee227392fba6c07981c7bfee8 SHA-1: e143511e32c6df904be0d343cffa9d7149fdefa3 SHA-256: 920a37f8de42e9c60f088f376c323bf8b681cf28ed1761892c623d20ddb90cac

240 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1566.001 Spearphishing Attachment

The file is a malicious Office document containing VBA macros. The critical ClamAV detection and high-severity heuristics indicate the presence of a downloader. Specifically, the 'Document_Open' macro and 'CreateObject' calls suggest that the macro is designed to execute arbitrary code. The presence of 'macros.bas' as an extracted artifact further supports this. The document body is heavily corrupted and unreadable, providing no additional context for the lure.

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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