Resubmissions

17/07/2026, 22:15

260717-157gdafv4l10

17/07/2026, 22:04

260717-1zc1kse19k10

General

  • Target
    MatsTools.bat
  • Size 59KB
  • Sample260717-157gdafv4l
  • SHA256 878695e41560f1e0d9e3222914fb0f1d37532b4e37882d76474cdbbb5dad0fcf
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Targets

    • Target
      MatsTools.bat
    • Size 59KB
    • SHA256 878695e41560f1e0d9e3222914fb0f1d37532b4e37882d76474cdbbb5dad0fcf
    • MD5 SHA1 SHA512 SSDEEP TLSH
    • Detects KillMBR

    • Family: KillMBR

      KillMBR is a trojan that attempts to overwrite the Master Boot Record.

    • Modifies WinLogon for persistence

    • Disables RegEdit via registry modification

    • Executes dropped EXE

    • Contacts third-party web service commonly abused for C2

      Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.

    • Deobfuscate/Decode Files or Information

      Payload decoded via CertUtil.

    • Drops desktop.ini file(s)

    • Writes to the Master Boot Record (MBR)

      Bootkits write to the MBR to gain persistence at a level below the operating system.

    • Sets desktop wallpaper using registry

MITRE ATT&CK Enterprise v16

Tasks