Office (OLE) / .DOCX malware analysis — malicious · 1a9901bb02a8db10

MALICIOUS

Office (OLE) / .DOCX

176.0 KB Created: 2020-09-17 20:07:00 Authoring application: Microsoft Office Word

MD5: aa12177a9b5a888da3df285bac392a06 SHA-1: 849acaae5ef11ff135b72212a7f1ae066bc67909 SHA-256: 1a9901bb02a8db1051d8eeeb1318426ca8d790cf5a1e39ae48545bbe0e7a0f31

240 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample contains VBA macros, specifically a Document_Open auto-exec macro that utilizes CreateObject. This indicates the document is designed to execute arbitrary code upon opening. The ClamAV detection as 'Doc.Downloader.Generic' further supports that this file's primary function is to download and execute a secondary payload. No specific family could be identified, but the technique is common for initial access.

Heuristics 7

ClamAV: Doc.Downloader.Generic-9763054-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Generic-9763054-0
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` `620e9eb15c32ed012e3e43742d6a5833fa906ea09e2bf7ca9f4f384d7210c8d6`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	21992 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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