Office (OLE) / .DOCX malware analysis — malicious · a8f76389eb48147f

MALICIOUS

Office (OLE) / .DOCX

217.4 KB Created: 2020-09-21 20:39:00 Authoring application: Microsoft Office Word

MD5: b7b7ca3cb49b5f65aedca723ce0dbc1c SHA-1: dee06ce3bed4f7ffa8e937f4d6cc17e8e1cb2751 SHA-256: a8f76389eb48147fbdfcf5e3037911b1d933d7e0a1da38d58125ee2b9084b561

280 Risk Score

Malware Insights

MITRE ATT&CK

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

The file is a Microsoft Office document containing VBA macros, as indicated by multiple heuristic firings including OLE_VBA_MACROS and OLE_VBA_PCODE_AUTOEXEC_EXEC. The presence of a Document_Open macro and CreateObject/GetObject calls suggests that the macros are designed to execute automatically when the document is opened. The ClamAV detection of 'Doc.Downloader.Generic' further supports the conclusion that this document is a downloader. No specific URLs or external hosts were extracted, but the presence of the 'macros.bas' artifact implies the macro code itself is the primary component for malicious activity.

Heuristics 8

ClamAV: Doc.Downloader.Generic-9764666-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Generic-9764666-0
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` `6d2f50f334b8e082813c694e310720d341c184a4af51360bc43b61318b8ab2c5`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	19051 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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