Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 594d2080f0bf84a7…

MALICIOUS

Office (OOXML)

41.5 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: 76267b1658f44cb1c1d91af8524cd274 SHA-1: 28fa09bb0f7efb0bba1ce062045cbae643cf5e11 SHA-256: 594d2080f0bf84a7d3e44a8513f769c1b04b38828aa6215252eaf055ec07acf3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1059.003 Windows Command Shell T1566.001 Spearphishing Attachment

The OOXML document contains VBA macros that reference cmd.exe and PowerShell. The presence of a GetObject call and the critical heuristic for PowerShell reference in VBA suggest the macro is designed to execute arbitrary commands. The VBA code itself appears to be obfuscated, but its intent is likely to download and execute a second-stage payload, indicated by the critical heuristic.

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
a1c401810cc7eeca8d236c00207e198f5baab23b3777d8e5cdd922b74f88d720		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 34430 bytes
vbaProject_00.bin
8b2ee9ddd478c233839d4ba7d93355107d85ade207fb4bc3d4e8e8c70952b816		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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