Office (OLE) / .DOCX malware analysis — malicious · 91646523a0f07719

MALICIOUS

Office (OLE) / .DOCX

177.2 KB Created: 2020-09-28 12:01:00 Authoring application: Microsoft Office Word

MD5: 681710d1f8527c9b9adf2e024cd2e3f2 SHA-1: 1e3cee1f38842635e70e73e7adef9a80b06ade4f SHA-256: 91646523a0f07719b33e85b40459fc5b5f963597e0c28b080523878c5d4f828c

240 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File

The sample contains VBA macros, specifically a Document_Open macro that utilizes CreateObject, indicating an attempt to execute code upon opening. The ClamAV detection as 'Doc.Downloader.Generic' further supports its malicious nature. The presence of the 'macros.bas' file and the auto-execution of Document_open strongly suggest the document's primary purpose is to download and run a secondary 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` `41d5da1c3b5ac37936783dc0f6deb9a466b44f4833e7f3cfb69b25cedc4e48ca`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	6262 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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