Office (OLE) / .DOCX malware analysis — malicious · 81c78e098a381575

MALICIOUS

Office (OLE) / .DOCX

219.3 KB Created: 2020-10-28 16:03:00 Authoring application: Microsoft Office Word

MD5: ff04cd12ca7b58a21f5a8ce964d0bafe SHA-1: 2692dc5650a42f61b1791e21051b3f64c3ad0005 SHA-256: 81c78e098a3815757ed038c5f386d54156fe5ea85eeea2bc5baceff398d35a3a

240 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample contains VBA macros, including a Document_Open auto-exec macro, which is a common technique for initial execution. The CreateObject call and p-code execution further indicate malicious intent. ClamAV detection as 'Doc.Downloader.Generic' suggests the primary function is to download and execute additional malware. The document body content is heavily obfuscated and does not provide clear user-facing lures.

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` `432b4517275395423e4145d722d6a456d77df175cda38550f4e26528858e8adb`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	18870 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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