Office (OLE) / .DOC malware analysis — malicious · 84240266200f3b42

MALICIOUS

Office (OLE) / .DOC

1.88 MB Created: 2021-12-09 21:09:00 Authoring application: Microsoft Office Word

MD5: 509b89137c78068be70638cbcc5ef8f5 SHA-1: 15fd801e764e7e02f90676a4fc1a18361be49aa9 SHA-256: 84240266200f3b4252535bfcf7f1ddee2a4fd7fdbb94f61aa627f2e8f2c9d6d3

142 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1053.005 Scheduled Task

The sample contains VBA macros, including an Auto_Close macro, which is a common technique for malicious documents. The script utilizes CreateObject to interact with the system and appears to be setting up a scheduled task for execution. The specific object and method calls suggest an attempt to establish persistence or schedule a malicious payload. The reconstructed string 'H2A(H2A(ArrayList(413)))' is likely an obfuscated reference to a system object used for task scheduling.

Heuristics 5

Auto_Close macro high OLE_VBA_AUTOCLOSE

Auto_Close 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` `02bc8e4b34a233c6d768d53e88c59b41f0fcc2c75df4544d278d50f115c1801b`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	17086 bytes

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