Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 0469d7d40c482166…

MALICIOUS

Office (OOXML)

41.5 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: 6c5715fa0e3cd07a5e757df29e129116 SHA-1: 3e03d45253eb0d7a9e43acb1dec0d06624d27dae SHA-256: 0469d7d40c482166750cb9b49cae478c9afb6c25b9b709e503b9125fbf7b62ac
160 Risk Score

Malware Insights

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

The file contains VBA macros that reference cmd.exe and PowerShell, indicating an attempt to execute arbitrary commands. The presence of GetObject and a critical heuristic for PowerShell references suggests the macro is designed to download and execute a secondary payload. The obfuscated nature of the VBA code and the lack of specific 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
4175ff093440a5e417993ff8241e62d8b57e9a3d5ee8ab28f4aecb66ca03c80a		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 34430 bytes
vbaProject_00.bin
69c7d921248a0e5cc3764d3b36a7b1a21b440db21d1b587751839da09fde26a4		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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