Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 9567ec8ad24bd9b7…

MALICIOUS

Office (OOXML)

41.7 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: f94558a8b63166f41ef82f98304bbf44 SHA-1: d7853845813ebff82ca7270761df5d1b11731b7f SHA-256: 9567ec8ad24bd9b708532567705c3ee73e3932a0ec2640f5719545b0a6c04f4b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1059.005 Visual Basic T1204.002 Malicious File

The sample is an Excel document containing VBA macros. Heuristics indicate the VBA code references PowerShell and cmd.exe, and uses GetObject. The VBA macro itself appears to be heavily obfuscated, but its presence and the associated heuristics strongly suggest it's designed to download and execute a secondary payload. The specific obfuscation and lack of clear URLs prevent definitive family attribution.

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
80f17987a5fd62ede117c8fd539d543c0abf09984ee98b95ca1678c814ed4f51		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 34430 bytes
vbaProject_00.bin
3a43b9812550d698d48903692d320a9dd10969d0e8137a720aaffa39c022f8cf		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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