Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 03ae23e3c9957088…

MALICIOUS

Office (OOXML)

41.6 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: c7c5cd427f5aaec319f7fbe41a25830e SHA-1: 2404b8e89637b591e2e8e4c737712888a6d51c12 SHA-256: 03ae23e3c9957088292748ddaa3e8b597e2720e499d437e852927544d0ed4aa9
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 cmd.exe and PowerShell. The GetObject call and the presence of a VBA project indicate that the macros are intended to be executed. The script likely downloads and executes a second-stage payload, which is a common technique for initial access and execution.

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
d68194f5f82ebfd4dbdf1c62ebe37d5f93aa7104dc9c24703e2a8d67580c5ee1		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 35036 bytes
vbaProject_00.bin
4a54723be4c5c7b4238c9aa8188a90328db7f89d9354828d6c7228dd6b51245b		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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