Office (OLE) / .DOC malware analysis — malicious · 5da441a5129f4d0c

MALICIOUS

Office (OLE) / .DOC

213.8 KB Created: 2018-07-19 05:29:00 Authoring application: Microsoft Office Word

MD5: 26583c9d8b4cf5a1069d2a47d219201c SHA-1: 116c314974d3d75b9f8adb87c0dc9fbf8794f06a SHA-256: 5da441a5129f4d0cb8ab72d45b985fb9238218eee413835e1c6d94686fad9d5d

222 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1203 Exploitation for Client Execution

The sample is a malicious Office document containing VBA macros. The critical 'OLE_VBA_SHELL' heuristic indicates the use of the Shell() function, which is commonly used to download and execute secondary payloads. The 'Document_Open' macro and 'OLE_VBA_PCODE_AUTOEXEC_EXEC' heuristic further confirm that the macro is designed to execute automatically upon opening the document. ClamAV detection confirms the malicious nature of the file.

Heuristics 6

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
ClamAV: Doc.Malware.Valyria-6874597-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Valyria-6874597-0
Document_Open macro high OLE_VBA_DOCOPEN

Document_Open macro
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` `eaa0d63e99d190a5af05a1cd1a9f0e0a8df289844090e9e651ec036a7a22af85`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	37403 bytes

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