Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 9407d337a38024ce…

MALICIOUS

Office (OOXML)

41.6 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: 60ccd9c925c374f8e0bf275a7161c0cc SHA-1: 64604aa2268e7d8e9ff5bf6238e41f1fdf21e5a1 SHA-256: 9407d337a38024cefa74aa849f07b6df91ae3811e95fe90d99027fab7c24dd1a
160 Risk Score

Malware Insights

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

This Excel document contains VBA macros that reference cmd.exe and PowerShell. The critical heuristic 'OLE_VBA_PS' indicates a PowerShell reference within the VBA, suggesting the macro is designed to execute PowerShell commands. The 'GetObject' and 'cmd.exe' references further support the likelihood of executing external commands. The primary function of the VBA appears to be obfuscated execution of a PowerShell payload, which is commonly used to download and run further malicious content.

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
9ba9d02c3e6fd0ce3c54438762560877996fbe911ff4164497becd192c29c19f		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 35036 bytes
vbaProject_00.bin
b3dfda9a6fc505c3db3ded457b64cb8ed3f80f9ffda85601ec71e500f21a8e06		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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