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

Static analysis result for SHA-256 964d08c30e93f4f9…

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: aeb1778d4b96e3070355d39f2b08a46a SHA-1: 4e1541914e151c4edc44b911d05350cf97b126af SHA-256: 964d08c30e93f4f9783728ce6f35da2caf3dcacabc85bf39ab54e8e3f9083c53
230 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File T1105 Ingress Tool Transfer

The sample is a malicious OOXML document containing a VBA macro. The macro utilizes the Shell() function and CreateObject() to likely download and execute a second-stage payload. The presence of the 'Document_Open' macro indicates an attempt to automatically execute malicious code upon opening the document. While specific URLs are not directly visible due to obfuscation, the overall behavior points to a downloader.

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
bdb05cd6573e01d3744adee17c856a1c40f9563313fc772c3c95f795bf486e51		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 17748 bytes
vbaProject_00.bin
a2a1ff9f65ea4b9a723e78a199d3ab70d74d4d1bcd29dd3aa2ee3742fddd13a3		 vba-project OOXML VBA project: word/vbaProject.bin 36864 bytes

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