Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 75234ca5533e02e4…

MALICIOUS

Office (OOXML)

41.6 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: 9a8226b68ff8dad1251d69f58b781f3b SHA-1: f790eaecc46b6527e3f98dbfe0360fd89e09c1a4 SHA-256: 75234ca5533e02e449302070eaf352e7ad97457a2b205e8f2d240a811b0fc3cb
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 document contains VBA macros that reference cmd.exe and PowerShell. The GetObject call further suggests the execution of external commands or scripts. The presence of these elements indicates the macro is designed to download and execute a secondary payload, a common technique for initial compromise.

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
ff46adf5b606b4d8229cfea1f808366cb2be0e37c1756e22cbf17d8bde463e92		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 35036 bytes
vbaProject_00.bin
896ae5079111b88f82fee5b8982af62b986a4fe460a20c4bc15b66bff0f5d078		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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