Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 c4bccfcd2a7ab4dd…

MALICIOUS

Office (OOXML)

41.5 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: 67f064b9e0584e0c446f37b111204f85 SHA-1: 10e1930f9dc86b73e8ed2cdf1062e7e4419a6201 SHA-256: c4bccfcd2a7ab4dd869c8063d995b629c79f035393563f21726511dd3fcb4edf
160 Risk Score

Malware Insights

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

This OOXML document contains VBA macros that reference cmd.exe and PowerShell. The GetObject call and the presence of VBA macros suggest an attempt to execute arbitrary code. The VBA code appears to be obfuscated, but the references to cmd.exe and PowerShell indicate a likely intent 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
bceb24690379f048af98f3d1561abe115649b4d7110fecbc52330178382ff1cd		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 34430 bytes
vbaProject_00.bin
5751186940e53dae4f127c43bfa940e4afb7c68e1b2abd9557a59d186eaef783		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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