Office (OLE) / .DOCX malware analysis — malicious · a1799209764bed65

MALICIOUS

Office (OLE) / .DOCX

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

MD5: 8b0afc380c1acb7ae9d6c2dcf627980d SHA-1: d78034bd53f393ad233a35f0729caaf87485c9b0 SHA-256: a1799209764bed652f49c9a7ae69f831ccd969f7376551302156c8a6b543394f

240 Risk Score

Malware Insights

MITRE ATT&CK

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

The file is a Microsoft Office document containing VBA macros, specifically a Document_Open macro that uses CreateObject. This indicates an automated execution of malicious code upon opening the document. The ClamAV detection 'Doc.Downloader.Generic-9768640-0' strongly suggests a downloader functionality. The macro's auto-execution and use of CreateObject point towards downloading and executing a second-stage 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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