Office (OLE) / .DOC malware analysis — malicious · 813f290824ec255b

MALICIOUS

Office (OLE) / .DOC

163.0 KB Created: 2020-09-17 22:39:00 Authoring application: Microsoft Office Word

MD5: 426f1b62ebdea39b6ecd05c1f1795420 SHA-1: 48110252bed450a2243d3220ec2537f756cad732 SHA-256: 813f290824ec255bacd9c85e3a0c2f082c963fe5889f6ebd29a92ee12319d155

240 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample is a Microsoft Word document containing VBA macros. The 'Document_Open' macro is configured to execute automatically upon opening the document. This macro utilizes 'CreateObject' to initiate the execution of a secondary payload, as indicated by the 'OLE_VBA_PCODE_AUTOEXEC_EXEC' heuristic. The ClamAV detection 'Doc.Downloader.Generic-9763145-0' further confirms its malicious nature as a downloader. No specific URLs or executable artifacts were extracted, but the presence of auto-executing VBA code strongly suggests a downloader attack pattern.

Heuristics 7

ClamAV: Doc.Downloader.Generic-9763145-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Generic-9763145-0
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.
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` `1e2a7d06314ac88dde2877d244d6ca5e91533ec592ad1318aa4aab91c451ca9e`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	21979 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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