Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 f050ca158925586f…

MALICIOUS

Office (OOXML)

41.6 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: f7b6330f35b0bf2d5424a6216a66905b SHA-1: fff27b46790e2db6337027f0cd13af009856df13 SHA-256: f050ca158925586faa4217535bc41bc8d47c3b31d071f59845969f2ffcfff387
160 Risk Score

Malware Insights

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

The OOXML document contains VBA macros that reference PowerShell and cmd.exe. The presence of a GetObject call further suggests the execution of external code. The VBA code itself appears to be heavily obfuscated, but its intent is likely to download and execute a second-stage payload, which is a common technique for malware distribution.

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
c179b93c8132a04d32b7597f3534bad5b3f52375eeca3f46bfde7e5b45974913		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 35036 bytes
vbaProject_00.bin
84a6566bb80c45ea9e11408905ab4f3e034fc1bf4a7c0ba46f08f221bd36fb85		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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