Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 d58ef07f236eea35…

MALICIOUS

Office (OOXML)

41.6 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: 81cf54c1201c37b09bb72b24827dbcb6 SHA-1: 49daf01d4869047c7e3becb7e509b42d225dc982 SHA-256: d58ef07f236eea35bf0f96a542606a689abb40033236b3578b4540db58f15e19
160 Risk Score

Malware Insights

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

This OOXML document contains VBA macros that reference PowerShell and cmd.exe. The GetObject call and the presence of a VBA project strongly suggest malicious intent. The VBA script itself appears to be a Base64 decoder, likely used to obfuscate a payload that is then executed via PowerShell, indicating a downloader or droppper functionality.

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
10e92b3eb71394fa7892edac3236cb9c6500c703c9f369b96addd0f0910a830b		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 35036 bytes
vbaProject_00.bin
cf009ae98d81a49335bd26cf9fadf16cf84a798f195e4a3f485bd6308fb66195		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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