Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 19bc82fd9c7b18fd…

MALICIOUS

Office (OOXML)

41.6 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: c9fe217fe30f1431c5634f8b35eb6e59 SHA-1: 44d4b58428ec9c167d6034058f318eb6c58abed6 SHA-256: 19bc82fd9c7b18fd571db44db264a0f85c1bf55026bfce415a63d69e1dd3d5f0
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 critical heuristic 'OLE_VBA_PS' indicates a PowerShell reference within the VBA, suggesting the macro is designed to execute external commands. The presence of a VBA project and macro file further supports this. The likely intent is to download and execute a second-stage 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
dc201d4633152100a3d10eb970949c07252b26a84ef5fde76e9e8ca7e8f014e3		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 35036 bytes
vbaProject_00.bin
e886392f9bd37927fa4877eea3c91ac304fa8b1029df220c9b475de11ab47cf0		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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