Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 62005501f947b6d1…

MALICIOUS

Office (OOXML)

41.5 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: da553c1a14cc009353d523bfeb7c865c SHA-1: 5e90d710b96fd6de411b9175da0eafedea35a95b SHA-256: 62005501f947b6d15c7e49b2010f7899f39a8e6aa0eaf122ad6fab759cd13010
160 Risk Score

Malware Insights

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

The Excel document contains VBA macros that reference cmd.exe and PowerShell. The GetObject call and the presence of a Base64 decoding function suggest that the macro is designed to download and execute a secondary payload. The specific obfuscation and lack of clear indicators prevent definitive family attribution.

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
616d3bc4b404971b82b9727dde261cea9cbbeddc5fb47866af8c9f67f05b66d9		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 34430 bytes
vbaProject_00.bin
af01cac055d4d744341bdfb517c76194251747708b67b5a549dd237b57d5bc7a		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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