Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 389813de2967ab37…

MALICIOUS

Office (OOXML)

41.5 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: 37f0956fc78b3b8b37232ad100f193b1 SHA-1: 5e5204e771a767dda20176febac288d6055f8375 SHA-256: 389813de2967ab37a7d2f42e687a3a5812434a327690c682019e7b5c23b09272
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 PowerShell and cmd.exe, indicating an attempt to execute arbitrary commands. The GetObject call further suggests the potential for object manipulation or execution of external code. While the specific payload is not directly visible, the presence of these indicators strongly suggests a downloader or dropper functionality.

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
526fae01aa7fc27b94cd6da16ffe3c3ee0db3afba9c9149ef4e36543130840a7		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 34430 bytes
vbaProject_00.bin
75e2c6364eb0f3de8adf8a6c007d304ccd269cc11d108bc54954fc0a86ee4d2d		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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