Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 51fef02acdd18a86…

MALICIOUS

Office (OOXML)

41.6 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: 49168fbccc526792580b9dd1a6690a2a SHA-1: 4ab0121b6a37c2636fd55151d0e8c6016ec9d5e2 SHA-256: 51fef02acdd18a868dc2e2a439d84eeb2c319d67bc9bbacc23fcfe1e158714ba
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1059.003 Windows Command Shell T1204.002 Malicious File

This Excel document contains VBA macros that reference PowerShell and cmd.exe, indicating an attempt to execute arbitrary commands. The presence of a GetObject call further suggests the potential for object manipulation or execution of external code. The VBA code itself appears to be obfuscated, likely to conceal the download and execution of a secondary 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
5e3b7bdf886bbb3d36e15dc5064f643078f6ee6583d7a81bb2f455d31797eb10		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 35036 bytes
vbaProject_00.bin
332113a7a583a7f2434ce3210a967919eaf8dccfbdc852f673a0c658ca7018b3		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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