Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 06343a280f3a2661…

MALICIOUS

Office (OOXML)

41.5 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: eebdc0ece702feef1f0a28958c4e40ba SHA-1: c7b2674e155a6bcd4807aa38d35b6099d76f5936 SHA-256: 06343a280f3a2661465a68483db77ae2b1d7d05761c3150b703e3e5cf4e933b2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1059.003 Windows Command Shell T1204.002 Malicious File

The VBA macros within this Excel document contain references to cmd.exe and PowerShell, indicating an attempt to execute commands on the host system. The presence of a GetObject call further suggests the potential for object manipulation or execution of external code. The macro code itself appears to be obfuscated, but its primary function is likely to download and execute a secondary 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
8b0cc7a67c280972c502c0d2e713d7de23ecd977f671e2e9415dd9d91c512bd6		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 34430 bytes
vbaProject_00.bin
9f426f3fcef3c1312cd746ae30430694e7436903190b3d4ce110360810889875		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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