Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 60e76a95356302f4…

MALICIOUS

Office (OOXML)

41.6 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: e475a10a54da1c9e131e4435365191c9 SHA-1: f87b49e66d42335c1ee8478d8c46a81719136d1d SHA-256: 60e76a95356302f4e3f125da82a1b09e08fb72be50819733f9a9690a584baa57
160 Risk Score

Malware Insights

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

The OOXML file contains VBA macros that reference PowerShell and cmd.exe. The GetObject call and the presence of VBA macros suggest an attempt to execute arbitrary code. The VBA code appears to be obfuscated, but the references to PowerShell and cmd.exe indicate a likely intent to download and execute a second-stage payload.

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
ccac0ac0b079c3484d2ff2079426933cdcabeb0909f524d5d7dd306a74871739		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 35036 bytes
vbaProject_00.bin
32e2f768e031e506e09ef95231028ec6c1c90639bd40d77ca54a034e1506180b		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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