Office (OLE) / .DOC malware analysis — malicious · 4a86aedb9ad3d765

MALICIOUS

Office (OLE) / .DOC

199.0 KB Created: 2020-09-21 15:38:00 Authoring application: Microsoft Office Word

MD5: 3387874ab306f66196cb2dcf785bf4ba SHA-1: c240591c1711815d27e1a88491bda4b1f458bc35 SHA-256: 4a86aedb9ad3d765aac458335051dedab740ea045e92a7bd07d69b0892fed180

280 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The file is a malicious Office document containing VBA macros. The critical ClamAV detection and high-severity heuristics for OLE_VBA_DOCOPEN, OLE_VBA_CREATEOBJ, OLE_VBA_GETOBJ, and OLE_VBA_PCODE_AUTOEXEC_EXEC indicate that the Document_Open macro is configured to execute code via CreateObject and GetObject. The presence of the macros.bas file further supports this. The primary attack pattern involves leveraging these macros to download and execute a secondary payload.

Heuristics 8

ClamAV: Doc.Downloader.Generic-9764611-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Generic-9764611-0
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` `5d7bb4a979a8044f246ba5c84f189375b54b56efdae346456cb14e1498096bdd`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	19055 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.

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