Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 cd8f961e7c14ede0…

MALICIOUS

Office (OOXML)

41.6 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: 2a39c88d571d1aca8d1e57fecd262ea0 SHA-1: c246bc16c00ff7681fd6d2c29327cabcbf96b70a SHA-256: cd8f961e7c14ede09258241b770d3f3d510390efe77364502fb0262179a833cc
160 Risk Score

Malware Insights

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

The Excel file 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 idea of executing external commands. The VBA code itself appears to be heavily obfuscated, making it difficult to determine the exact payload, but the overall pattern points to a downloader or initial execution stage for a malicious payload.

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
154f95324197d940f2b13d9d6395950dfe6424e0da5fdff0937855804933eed7		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 35036 bytes
vbaProject_00.bin
ac8bd71c3c745afe263e9032609d800b4431dbafe5317ca2c0af8091788ac8d3		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.