Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 89055364e05baf67…

MALICIOUS

Office (OOXML)

41.6 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: 1bc07574e68940de1aa00f59bf52f4f6 SHA-1: 3a04a1f0819f435760a7960f475271309950db43 SHA-256: 89055364e05baf67ca4e6abc11065920aa06fcf0439270d66f7490be084d2a1e
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 PowerShell and cmd.exe, indicating an attempt to execute arbitrary commands. The GetObject call and the presence of a VBA project further support this. The primary function 'Decode64' suggests that obfuscated code, likely a downloader, is present within the macros.

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
a18fd6b9ab96b76e85d00e95f9e81269dd712d787b708aae861ab89a408ee7ec		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 35036 bytes
vbaProject_00.bin
fd70fad8ca90d1110ec41003de7ff036a67c4bb5e737159e6a7695237c704377		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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