Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 e6a88d31dffa2930…

MALICIOUS

Office (OOXML)

41.6 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: 9e673b9c5708346d5ebea7ee8998bc4f SHA-1: a40592205915ed5a33f4f6bc80c1f5d005de4677 SHA-256: e6a88d31dffa293091be9f37354c8d40ec032b8877eefe4279ede18130f24073
160 Risk Score

Malware Insights

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

The OOXML file contains VBA macros that reference cmd.exe and PowerShell. The presence of a GetObject call and a PowerShell reference strongly suggests the macro is designed to execute commands, likely downloading and running a secondary payload. The Decode64 function indicates potential obfuscation of malicious code or URLs.

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
b50c86c92752d5706b864649dc66684173fd91086b26cdedc0d73d7c02f92d1b		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 35036 bytes
vbaProject_00.bin
b057f565253dd0721db0dcaad2f47612e034e0d4e6585189a9bb78e4484aabec		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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