Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 cc10e21b406451f9…

MALICIOUS

Office (OOXML)

41.6 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: e0c0e9f81928e0390c8457c71981a6fd SHA-1: eb01459a62308dda7d39752c70ea12b0e3e7ce2e SHA-256: cc10e21b406451f97601d55dedbc686852861b17cb162c70df995ca442964f95
160 Risk Score

Malware Insights

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

The OOXML document contains VBA macros that reference cmd.exe and PowerShell. The GetObject call and the presence of a VBA project indicate that the macros are intended to be executed. The script's primary function appears to be downloading and executing a second-stage payload, as suggested by the PowerShell and cmd.exe references.

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
27863535b2098804cf536ba593dd2846ee872c07ca393284c86d660fceed7a22		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 35036 bytes
vbaProject_00.bin
975151f641ed266692803f1e03349013ef10f68a3bcd3561c9bc75a7be377406		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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