Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 3c6e72cfc5d4c7dc…

MALICIOUS

Office (OOXML)

41.6 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: 1035aa459d1d34e70a5859fdbfbf178b SHA-1: 643687f6456ad54ff7bfc1c6b2234a38dee5649e SHA-256: 3c6e72cfc5d4c7dc71f4fdb2e26b99b03b522e81c2fcdf9daeb17fcf07871aa1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1059.003 Windows Command Shell

The OOXML file 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 PowerShell commands. The 'GetObject' call and 'cmd.exe' reference further support the execution of external commands. The VBA code itself appears to be heavily obfuscated, making it difficult to determine the exact payload, but the overall pattern suggests 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
8687b069b3f1d0ea567651df2cf70809714fec3d9c7f30cdfcd581560773e10e		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 35036 bytes
vbaProject_00.bin
fb331601bbbc2f3f5287018faa251b61dcd4384e6b4fe68d2788dab40c22334d		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.