Malicious Office (OOXML) / .DOC — malware analysis report

Static analysis result for SHA-256 077320e8572a208b…

MALICIOUS

Office (OOXML) / .DOC

1.27 MB Created: 2022-11-01 14:58:00 UTC Authoring application: Microsoft Office Word 14.0000 First seen: 2022-11-11
MD5: b087606e8e4b80a643e3534b8661a379 SHA-1: 06855f3cb54e9b954f4db244d4c15ca0f387757d SHA-256: 077320e8572a208b06fdea24aea171582db99b2fd112ecce37c68f18ed27e328
230 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The sample is a malicious OOXML document containing a VBA project with a Document_Open macro. This macro utilizes the Shell() function, indicating an attempt to execute arbitrary code. The presence of a VBA macro that likely downloads and executes a second-stage payload, as suggested by the ClamAV detection name 'Doc.Downloader', points to a downloader malware.

Heuristics 7

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • ClamAV: Doc.Downloader.afc5c039d11fd238-9978787-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.afc5c039d11fd238-9978787-0
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • VBA project inside OOXML medium OOXML_VBA
    Document contains a VBA project — VBA macros present
  • Environ() call (env variable access) low OLE_VBA_ENVIRON
    Environ() call (env variable access)
  • 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.microsoft.com/office/word/2010/wordprocessingCanvas
    • http://schemas.openxmlformats.org/markup-compatibility/2006
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships
    • http://schemas.openxmlformats.org/officeDocument/2006/math
    • http://schemas.microsoft.com/office/word/2010/wordprocessingDrawing
    • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing
    • http://schemas.openxmlformats.org/wordprocessingml/2006/main
    • http://schemas.microsoft.com/office/word/2010/wordml
    • http://schemas.microsoft.com/office/word/2010/wordprocessingGroup
    • http://schemas.microsoft.com/office/word/2010/wordprocessingInk
    • http://schemas.microsoft.com/office/word/2006/wordml
    • http://schemas.microsoft.com/office/word/2010/wordprocessingShape

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
2f2a57a9d037c9437542a4f3c573d6dbdabe2db53db053a9d96fc94277a7018b		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 17944 bytes
vbaProject_00.bin
266c5d2c328855eb99e266780b9342e31bdfe26cdcdbcdb35c50ab7cbd01cbd5		 vba-project OOXML VBA project: word/vbaProject.bin 36864 bytes

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