Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 04072b3b72f6e221…

MALICIOUS

Office (OOXML)

41.6 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: 76e2cc0fb56575120660df2c3296632c SHA-1: 4178c43fa7f426a1f9a8ed2671beb590ca834f1c SHA-256: 04072b3b72f6e221bcad0394ebf0cccd97fda042ae837b91c5ac311bc95bd01c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1059.003 Windows Command Shell

The OOXML document contains VBA macros that reference PowerShell and cmd.exe. The GetObject call and the presence of VBA macros suggest an attempt to execute malicious code. The VBA code includes a Base64 decoding function, indicating obfuscation, and is likely used to download and execute a secondary 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
69d683265defdf0a59e26ef245f52cb4d1169723c803a4d8b1ee1613ab6f5419		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 35036 bytes
vbaProject_00.bin
e443c32eee9e5984af3de58414a60190e20a0b04de285b0a10de36ab3b7923e8		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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