Office (OLE) / .DOC malware analysis — malicious · e269c6e7756b0076

MALICIOUS

Office (OLE) / .DOC

82.5 KB Created: 2022-01-17 11:29:00 Authoring application: Microsoft Office Word

MD5: dbc2e4848ec5116bb7dea17ee9427f33 SHA-1: 05dcbd5716e3f8d823012529f5b49dc88301090f SHA-256: e269c6e7756b0076059264be54874bb84f20c27b9c6b9589cf68da664605119c

222 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample is a malicious DOC file containing a VBA macro. The macro's Document_Open subroutine is triggered upon opening the document. It reconstructs a filename 'rtxMouseProcessor.h' and then uses the 'executive' function to execute this file. The 'executive' function appears to leverage Windows Script Host (WScript) to run the specified file, indicating a downloader or dropper functionality. The obfuscated document body and the use of CreateObject further support a malicious intent.

Heuristics 7

Reference to Windows Script Host high SC_STR_WSCRIPT

Reference to Windows Script Host
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` `cd18b76fa8ea1d1d30820cc9c77504ef56d4941e6302fb29fe859351944f21a7`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1200 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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