Office (OLE) / .DOC malware analysis — malicious · 3f8e3a5de2b1ac99

MALICIOUS

Office (OLE) / .DOC

103.5 KB Created: 2020-03-03 17:10:00 Authoring application: Microsoft Office Word

MD5: 3a8b565b6b1919761f3c772a11a7f058 SHA-1: cbe64a43c276c4ea4838a40563a6fe8cf6d276af SHA-256: 3f8e3a5de2b1ac99230f0d3c4c340b4c4080ebdf548d309b906687edaeed9e0c

340 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1218 Signed Binary Proxy Execution T1059.003 Windows Command Shell

The sample contains a malicious VBA macro that automatically executes upon opening. This macro utilizes `GetObject` and `CreateObject` to launch a WMI process, indicating an attempt to execute arbitrary code. The ClamAV detection further confirms its malicious nature. The primary attack vector appears to be leveraging VBA's capabilities to bypass security measures and initiate a secondary payload execution.

Heuristics 9

VBA WMI Win32_Process launcher critical OLE_VBA_WMI_PROCESS_CREATE

VBA macro builds or references a WMI moniker for Win32_Process and invokes .Create to start a command. This is a high-confidence macro execution chain that often hides the WMI class name through string concatenation or helper functions.
ClamAV: Doc.Malware.Generickdz-7608151-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Generickdz-7608151-0
Document_Open macro high OLE_VBA_DOCOPEN

Document_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
GetObject call high OLE_VBA_GETOBJ

GetObject 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` `66348b37c8556106acc04f1516dabecfbca0fc0dbd9cd6247f0d5f10b8babf3f`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	6338 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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