Office (OLE) / .DOCX malware analysis — malicious · 7c81019f932c35ff

MALICIOUS

Office (OLE) / .DOCX

179.0 KB Created: 2020-09-18 08:59:00 Authoring application: Microsoft Office Word

MD5: 904e1365136041b958a2f407bcf6731b SHA-1: 5131b48088dd3d75da858e8810c5888673955b5e SHA-256: 7c81019f932c35ff188d4260fe0b23ba6cb27363922cbb8265a8f3121e26c32f

240 Risk Score

Malware Insights

MITRE ATT&CK

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

The file contains a VBA macro that is automatically executed upon opening the document (Document_Open). This macro utilizes CreateObject, a common technique for executing arbitrary code, and is flagged as a critical downloader by ClamAV. The presence of VBA p-code auto-execution with execution tokens further supports the malicious intent. The macro likely downloads and executes a second-stage payload, as indicated by the ClamAV detection name 'Doc.Downloader.Generic'.

Heuristics 7

ClamAV: Doc.Downloader.Generic-9763419-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Generic-9763419-0
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` `2cacffa870bc163e0d80063dbad890b2628b581c624e40730ba57a6c44f2b3d2`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	20834 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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