Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 65875199f34bd704…

MALICIOUS

Office (OOXML)

41.6 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: aa45038b464d729c05c594ffdc5f6445 SHA-1: b786a8925cbe2aff408eea9a10f742ad45be9f07 SHA-256: 65875199f34bd7043b6c7312f8bc7adf817026de7b1fefac151bb3efe05d71e3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1059.003 Windows Command Shell T1566.001 Spearphishing Attachment

The OOXML file 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 PowerShell commands. 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, making it a likely spearphishing attachment.

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
0b86544475c9ec7aeddc968bb272cc50569850bf99733143821efbae955c4c78		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 35036 bytes
vbaProject_00.bin
7fd53beef227b3eec707a82339fcb0fcad14ba4932d62f67716b53b978938869		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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