Office (OLE) / .DOCX malware analysis — malicious · 8f3afa2da7f2e5cf

MALICIOUS

Office (OLE) / .DOCX

239.5 KB Created: 2020-10-29 04:25:00 Authoring application: Microsoft Office Word

MD5: e54e2291ede012d5de2268a2ac896e97 SHA-1: ba3b53b2e15aa0010e1c90ba5a1ff7b9e71761d8 SHA-256: 8f3afa2da7f2e5cf945c59daa84574119b092d7926eea15fb3f21367f6433c77

240 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample is a malicious Office document containing VBA macros, specifically a Document_Open macro. This macro is designed to execute automatically upon opening the document. The presence of CreateObject calls and the ClamAV detection as 'Doc.Downloader.Generic' strongly suggest that the macro's purpose is to download and execute a secondary payload. No specific family could be identified, but the delivery mechanism is clear.

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` `6946a447d4e81b55f46842d89fcb86ebdb7dd8c4ce560afbdde9533734f99d67`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	18622 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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