Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 722e24d5b5ddcdd4…

MALICIOUS

Office (OOXML)

41.5 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: 0d59be47b8f3b7dc3c144d391c599d98 SHA-1: 92a5f6d08d938eebf0c985d84705971fa67d7790 SHA-256: 722e24d5b5ddcdd456a9774666002b30c2f8f43b7f1679db5e97c21baa58c5a8
160 Risk Score

Malware Insights

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

The Excel 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 Decode64 function indicates potential obfuscation of a payload or URL within the VBA code, which is likely used 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
87e079fbb760192d3a2088e3854c23f7ab41c406af91d5f0de785f22a47f4f64		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 34430 bytes
vbaProject_00.bin
c89d325af21d0416404aba8d61d0f67d8055ceee1bf028983c702bee0b3b3553		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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