Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 c0462884b22bab2c…

MALICIOUS

Office (OOXML)

41.5 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: 3b7c9fd048df0ab887582434c9d480dd SHA-1: 53b806092e0c78c156c8d6f909b60d6f1944380c SHA-256: c0462884b22bab2cb34706c53af357911f0973140dd6fa34a594013487c6d356
160 Risk Score

Malware Insights

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

This Office document contains VBA macros that reference cmd.exe and PowerShell. The presence of a GetObject call and the critical OLE_VBA_PS heuristic suggest that the VBA code is designed to execute external commands, likely to download and run a secondary payload. The macro code itself appears to be obfuscated, making a precise determination of its functionality difficult.

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
52b52f030cc868fa6656c19984a7a63da6d97d208f6147f5e912cfc26cb70c6c		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 34430 bytes
vbaProject_00.bin
e286efa45f225de4f53f1caef5737ca2e8069bdc7b22bfa3949a58fae5c3d42c		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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