Office (OLE) / .DOCX malware analysis — malicious · 3a7f8b7f24d97e2e

MALICIOUS

Office (OLE) / .DOCX

106.3 KB Created: 2020-09-28 07:12:00 Authoring application: Microsoft Office Word

MD5: 17af5754e2c159502be73abce8894912 SHA-1: 519e751b44a9e0bd54c844ad295eaa315c0ef1cc SHA-256: 3a7f8b7f24d97e2ea61f1b179ad411301392cd3c102a3abc4d4b4785700dfae2

240 Risk Score

Malware Insights

MITRE ATT&CK

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

The file contains VBA macros, specifically a Document_Open auto-execution macro, which is a strong indicator of malicious intent. The 'CreateObject' call within the macro suggests the execution of external code. ClamAV also identified this file as a downloader. The document body content is highly obfuscated and does not provide clear user-facing text, but the presence of VBA macros and the ClamAV detection strongly suggest a downloader attempting to fetch and execute a second-stage payload.

Heuristics 7

ClamAV: Doc.Downloader.Generic-9768640-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Generic-9768640-0
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` `6e3a58a450c890732c571f70359c3bca273e55dc928d441e0e8fd2530ebd63b7`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	6228 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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