Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 8370e998d19ba2dd…

MALICIOUS

Office (OOXML)

41.6 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: 1655b2f8746f92893ea6146437dd02c1 SHA-1: 400fbd861d0ced02c6e7557a19ea1fae90b5dad1 SHA-256: 8370e998d19ba2dd22711b1e6f364707f815e3b92f1ea535839a1269630e41d0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1059.003 Windows Command Shell T1204.002 Malicious File

The OOXML file contains VBA macros that reference PowerShell and cmd.exe, indicating an attempt to execute commands. The GetObject call further suggests the potential for downloading and executing additional content. While the VBA code is heavily obfuscated, its primary function appears to be launching external processes.

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
97874c4db1e71e21ba9b3c80722b8d684dd1266b754a32e5e95bc6f19018a96f		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 35036 bytes
vbaProject_00.bin
1d101a8fa75702ee21502ac4c68bb7c69c656e9bf95e86a5c10a878aeca86681		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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