Office (OLE) / .DOCX malware analysis — malicious · b0144d3b84fcb16e

MALICIOUS

Office (OLE) / .DOCX

258.1 KB Created: 2020-10-29 09:30:00 Authoring application: Microsoft Office Word

MD5: 9a0664ce0d4452e73704d915d119350d SHA-1: 198112872ff728806db65538dfb762f0fd17a7ee SHA-256: b0144d3b84fcb16e6d521e31100944499659d0ed9065e7295eb557d60254be7b

240 Risk Score

Malware Insights

MITRE ATT&CK

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

The file is a Microsoft Office document containing VBA macros, specifically triggering a Document_Open auto-execution macro. This macro utilizes CreateObject, a common technique for initiating malicious actions such as downloading and executing further payloads. The ClamAV detection as 'Doc.Downloader.Generic' further supports this. No specific family could be identified, but the behavior is consistent with a downloader.

Heuristics 7

ClamAV: Doc.Downloader.Generic-9785156-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Generic-9785156-0
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` `2c8aded1cc33908777d3554a19067d8f93ed6d8269cc13dcdcff33eca45ebd5f`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	18919 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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