Office (OLE) / .DOCX malware analysis — malicious · 83d5e426acb354f7

MALICIOUS

Office (OLE) / .DOCX

206.4 KB Created: 2020-10-28 18:42:00 Authoring application: Microsoft Office Word

MD5: 556931181cdf9da604c7ddd683808e75 SHA-1: eadc90c159a54a4614e35a7d63ff7e69e7d1b47b SHA-256: 83d5e426acb354f79d4d34753eb72ca59aaa11a64226334ade780226e22a8df1

240 Risk Score

Malware Insights

MITRE ATT&CK

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

The critical ClamAV detection and high-severity heuristics for VBA macros, specifically the Document_Open auto-execution and CreateObject calls, indicate malicious intent. The presence of the 'macros.bas' file further supports this. The primary function appears to be the execution of VBA code that likely downloads and executes a second-stage payload, as suggested by the 'Doc.Downloader' classification.

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` `e949db65d47346cd391eb9bc49c66a713688cfea31c7cb788a6d1dce1ea9efc6`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	18584 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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