Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 84111fac714955c8…

MALICIOUS

Office (OOXML)

41.8 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: 42c04088cde3f795a892f9773f6a21b1 SHA-1: db9663aa1ad6751a9e8ad5aa00aba811b46e4cd1 SHA-256: 84111fac714955c831001eb4f1fcf61a93dd2223e34905f25e604bdf4b81302c
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 GetObject call and the presence of obfuscated VBA code suggest the macro is designed to download and execute a secondary payload. The specific family is not identifiable from the provided evidence.

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
39a8920a3bd79ee1279457eb0bf3baa1ec98c4dd49b9e965376e31dcd5e179d0		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 34430 bytes
vbaProject_00.bin
e4b01ac10342cd65824129cf6e458968da63d5d9949b066a5bc599f10f0f9636		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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