Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 6eb86ce0cdaf6449…

MALICIOUS

Office (OOXML)

41.5 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: 4f3e76d3e10f1cb4c665c5c6ce567b33 SHA-1: 383df1bc3f1ac5ed89bf56fc87eb1f6d474ca57a SHA-256: 6eb86ce0cdaf6449e97b914b190429ce4131cbd15d455a1ef4423a49aa86d2c7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1059.003 Windows Command Shell T1566.001 Spearphishing Attachment

The OOXML file contains VBA macros that reference PowerShell and cmd.exe, indicating an attempt to execute commands. The GetObject call further suggests the potential for downloading and executing additional payloads. While the specific family is not identifiable, the techniques used point to a macro-based downloader.

Heuristics 4

  • PowerShell reference in VBA critical OLE_VBA_PS
    PowerShell reference in VBA
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
  • cmd.exe reference in VBA high OLE_VBA_CMD
    cmd.exe reference in VBA
  • VBA project inside OOXML medium OOXML_VBA
    Document contains a VBA project — VBA macros present

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
4067bc849ff379405725f4906990c8de0d7be5181ef480f61308f2b78e9e7a46		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 34430 bytes
vbaProject_00.bin
d64b4c7c95d6861c94d90066e5cc1d892afc3c5fcfc0a1021a09faf06e2c59a3		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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