Office (OLE) / .DOC malware analysis — malicious · cf3446d715f38788

MALICIOUS

Office (OLE) / .DOC

128.0 KB Created: 2023-08-07 22:31:00 Authoring application: Microsoft Office Word First seen: 2023-08-08

MD5: f3babdf5425d5b040e1d0d6a964ef839 SHA-1: 37f3762c62647b7292334c4cda204733fd2acf2c SHA-256: cf3446d715f387885ce9dea26a9871aca80593a8a5ec081bbd98f9a79ffb6bee

362 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.003 Windows Command Shell T1105 Ingress Tool Transfer

The sample contains a critical OLE_VBA_SHELL heuristic indicating the use of Shell() and WScript.Shell. Additionally, OLE_VBA_HTTP_DROP_EXEC confirms that the VBA macros download and save a file to disk. The Document_Open macro is present and configured to execute, suggesting an automated execution flow upon opening the document.

Heuristics 9

Shell() call in VBA critical OLE_VBA_SHELL

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

WScript.Shell usage
VBA downloads and writes a file to disk critical OLE_VBA_HTTP_DROP_EXEC

VBA reads an HTTP response body and writes it to disk (ADODB.Stream SaveToFile). Combined with the auto-exec/Shell paths this is a download-drop dropper even when the COM ProgIDs are built dynamically to evade keyword scanning.
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.
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` `052cee1c36bd4c87e5296fe82be259b36bb50cd4a0085b69cc11ac772f0e15a9`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	12190 bytes

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