Office (OLE) / .DOCX malware analysis — malicious · d5c82fa7b506c1ac

MALICIOUS

Office (OLE) / .DOCX

153.9 KB Created: 2020-09-14 17:52:00 Authoring application: Microsoft Office Word

MD5: c94f7daed79d0032a3c9453c27f10e62 SHA-1: 4c2c7c6c377c61cbe3bc5b925cba09c546814a9c SHA-256: d5c82fa7b506c1ac8ed30c7a75bf6a742bed00c05ea6a867e9e07b0efa121abd

240 Risk Score

Malware Insights

MITRE ATT&CK

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

The file is a DOCX document containing a Document_Open VBA macro that uses CreateObject to execute code. This macro is designed to download and execute a second-stage payload, as indicated by the 'vba-macro' heuristic and the presence of the 'macros.bas' file. The ClamAV detection further confirms its malicious nature. The specific payload and delivery mechanism are not fully discernible from the provided evidence, leading to an 'unknown family' classification.

Heuristics 7

ClamAV: Doc.Malware.Generic-9760287-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Generic-9760287-0
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` `1c1ac6d8019d3317e1fd9360b916f40afe347161c1d653ef40242d0284d5107c`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	18510 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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