Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 9d3e312464baeaa8…

MALICIOUS

Office (OOXML)

41.5 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: 58e76244c1fb647b07627eadc7b12c46 SHA-1: eace0c3ec73b6f6c9a2f6bae2c83e678fb93e871 SHA-256: 9d3e312464baeaa80679a2444f40feaa5b0830165fa590633e6f5a2e72eaff98
160 Risk Score

Malware Insights

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

This Excel document contains VBA macros that reference cmd.exe and PowerShell. The presence of a GetObject call and the critical OLE_VBA_PS heuristic suggest that the VBA code is designed to execute external commands, likely to download and run a secondary payload. The Decode64 function indicates potential obfuscation or encoding of malicious content within the script.

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
a652b69daa894dc94982d02c47fd11b57372bef5fb03c0387f7ef801915fd3ea		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 34430 bytes
vbaProject_00.bin
8b984fcdbce7b52fa6d6f182071efbff4a8725bf14d7fa8fafae5b9b622a7cce		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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