Office (OLE) / .DOC malware analysis — malicious · 2b9c1981ecc18429

MALICIOUS

Office (OLE) / .DOC

88.5 KB Created: 2022-05-08 12:49:00 Authoring application: Microsoft Office Word First seen: 2022-05-08

MD5: c880f54dea1790057f23b1c33aedab48 SHA-1: 957126d97b6c70dfd4b99775337b88ab89d7de30 SHA-256: 2b9c1981ecc184292b944906a3b4ea1cedcd800c899326d18c57af3aea2d39a7

342 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.003 Windows Command Shell T1204.002 Malicious File

The sample is a malicious Microsoft Word document containing a VBA macro. The macro utilizes WScript.Shell and CreateObject to execute a shell command, as indicated by the 'OLE_VBA_SHELL' and 'OLE_VBA_WSCRIPT' heuristic firings. The 'Document_Open' macro is automatically executed upon opening the document, suggesting it's designed to immediately initiate the malicious payload. The extracted 'macros.bas' file is the source of this malicious VBA code.

Heuristics 9

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
WScript.Shell usage critical OLE_VBA_WSCRIPT

WScript.Shell usage
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` `3c04ea04467069829343dbe669abaec97bbecde737380a9c0db542f6810be8ab`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	23009 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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