Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 d3e4bf9487b28ef0…

MALICIOUS

Office (OOXML)

41.6 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: 3da92aea9777809fb2bfdf2a2d333fdb SHA-1: 7b274ce1cc2b9f0409b540dd7577c1994f8dd46e SHA-256: d3e4bf9487b28ef022a39cf7ef937a43a00cd87ea94139740174bc9a8fb3f977
160 Risk Score

Malware Insights

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

The OOXML document 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 a PowerShell command. The 'GetObject' and 'cmd.exe' references further support the execution of external commands. This pattern is commonly used to download and execute a second-stage 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
67c7bf58c8ab7e0add8f403cfe33cf1f5490eee87881cc4dab533fdf6c06ec33		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 35036 bytes
vbaProject_00.bin
2eeca15e2a0cbe0e93866a877c962f0d3dc5c8c67a8509074f307bc9031c235a		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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