Office (OLE) / .DOCX malware analysis — malicious · 3a379a77a348edf4

MALICIOUS

Office (OLE) / .DOCX

161.9 KB Created: 2020-09-23 12:48:00 Authoring application: Microsoft Office Word

MD5: de04dcd45f2b7de0bfd38a192492cd64 SHA-1: 317e70f07161852496697fded7ab78dac7e0e6a6 SHA-256: 3a379a77a348edf4336aa1c1fb80d875fb764e7a787bdba18f911ed8e091c932

240 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File

The file is a Microsoft Office document containing VBA macros, specifically a Document_Open auto-exec macro. This macro utilizes CreateObject, a common technique for executing arbitrary code. The ClamAV heuristic identifies it as a generic downloader. No specific URLs or further script details were extracted, but the presence of the Document_Open macro and CreateObject strongly suggests the intent to download and execute a secondary payload.

Heuristics 7

ClamAV: Doc.Downloader.Generic-9765533-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Generic-9765533-0
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` `b40b6439e0e94acfcf6292a727f89f3b7b0e2a6faeddd230541e1164d0603753`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	19346 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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