Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 dc5b3be18b4a48a5…

MALICIOUS

Office (OOXML)

41.5 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: 9f682d1d5ae266814bda1d9eae71ab20 SHA-1: 006c1b83fe020e875ff46fb649a02d7d7f3adc23 SHA-256: dc5b3be18b4a48a5b569f3b48980afd935a4ca30d210d31a2d81913d2cad8ab5
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 GetObject call and the presence of a Base64 decoding function suggest that the macro is designed to download and execute a second-stage 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
0e9669ecb1722203a1d2fb17aa50ffcc3c4aa7f0eaa6111921b99466fd8ac3af		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 34430 bytes
vbaProject_00.bin
96ebc331811620fb03882ba2539ff7c18ac9396f520d8e4416f0e55ffeebddc8		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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