Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 a2296f5599767f90…

MALICIOUS

Office (OOXML)

41.5 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: 1652a276157b95da66c60f44eed00b47 SHA-1: c29592304e7ac125d3ae665042aa4968b4479006 SHA-256: a2296f5599767f90e1177cc4d13f2a32236f6e9a1b484bbfed9b5c385d1e96b3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1059.003 Windows Command Shell T1204.002 Malicious File

This Office document contains VBA macros that reference cmd.exe and PowerShell. The presence of a GetObject call and the critical OLE_VBA_PS heuristic suggest the macros are designed to download and execute a second-stage payload. The Decode64 function indicates potential obfuscation of malicious code or URLs within the script.

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
785ed75b35789b81123128a03a5db6e1d30cfd06556504d16bf3dd847a6cc4e8		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 34430 bytes
vbaProject_00.bin
4d0b2fa7d9ddcd247889cfc558888aa4f35167e316c02be77343784c21b1508d		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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