Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 267d37b5ba742550…

MALICIOUS

Office (OOXML)

41.5 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: 8036dc682440b1a9c7f0889dca1ce143 SHA-1: e953765f885c84406e570532dffee705005b4f04 SHA-256: 267d37b5ba7425501da374fbfb0e57a19bca951914b6bf6a2631dccfbbbdb7b9
160 Risk Score

Malware Insights

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

The OOXML document contains VBA macros that reference PowerShell and cmd.exe, indicating an attempt to execute arbitrary code. The presence of a GetObject call further suggests the potential for object manipulation or execution of external components. The VBA code itself appears to be heavily obfuscated, making it difficult to determine the exact payload, but the overall pattern points to a downloader or initial execution stage.

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
eb09794876980da804b4dd5c63d3ad3e202178a8ad339df37cd3f60425353846		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 34430 bytes
vbaProject_00.bin
6d5acbee7837fc253dcd1a216d65b65c90d8931d4690fbb1c021ecabdf841a23		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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