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

Static analysis result for SHA-256 3039c68e44387047…

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: 20f0a1b6fec99139c2766b28e7d1b3f9 SHA-1: ef815254a50c1a3458038005abe1a0be1f2419b8 SHA-256: 3039c68e4438704724b15ce4a9b8875aeed7c234ffada8c8d37c7c17724606bd
230 Risk Score

Malware Insights

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

The sample is an OOXML document containing a VBA project with a Document_Open macro. This macro utilizes CreateObject and Shell() calls, indicating an attempt to execute arbitrary code. The ClamAV detection name 'Doc.Downloader.afc5c039d11fd238-9978787-0' strongly suggests the document's purpose is to download and execute a secondary malicious payload.

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
1558c770f69d0a53e850273f817772867fc155cf75dc51c6b670f9add7ae26be		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 17917 bytes
vbaProject_00.bin
ad51d03d18c0024d276499b90b4083663dbab027bca630daad6da8e4b74e8c92		 vba-project OOXML VBA project: word/vbaProject.bin 36864 bytes

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