Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 9cdf586948e3f385…

MALICIOUS

Office (OOXML)

41.6 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: 062776081627dacbe2a9a6f11833c7b2 SHA-1: 9218a87a46fa434e415bab41a1a3a467aa821ecb SHA-256: 9cdf586948e3f385b8eb3b67117f8a67eeb270086f6fbd2d3b31b3b9d6d15a3a
160 Risk Score

Malware Insights

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

This Excel document contains VBA macros that reference cmd.exe and PowerShell. The GetObject call is also suspicious. The VBA code appears to be obfuscated, but the presence of these indicators suggests the macro is designed to execute a secondary payload, likely via PowerShell, after being triggered. The specific family is not identifiable from the provided evidence.

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
cb0d04de5f48e344d73970bdc7daf513e48d81b441ba2d1487d2669cac5979fc		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 35036 bytes
vbaProject_00.bin
1b12d71e300a48c101a6db5aadca093dc4e82d98cb647004fd8879788ef61517		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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