General

  • Target

    d33d8e661e9117698f00b1635c7e42171ae5a2738ee40fb4cae28cdfed7e3447.elf

  • Size

    5.2MB

  • Sample

    250213-hhetqsvpds

  • MD5

    dabf6b48ef6b1e2583a8162b903d6264

  • SHA1

    42afd0b2022cfc5288b311336f29bed03302ee9b

  • SHA256

    d33d8e661e9117698f00b1635c7e42171ae5a2738ee40fb4cae28cdfed7e3447

  • SHA512

    b447b36497d491058970c8c6f3e1b81b516a8d7a99a9ae31c53289fa5b27619bdb14b454f31650db9abf486ca28b98a10f7dc50df08598733676bdc2cb9e9229

  • SSDEEP

    49152:7Xa6xzZWhrb/T4vO90dL3BmAFd4A64nsfJPJ6TdXnT9aqeJaz2xNkapDnYRQoj1+:b2ONLBzSxtSTIElHz

Malware Config

Extracted

Family

kaiji

C2

kz1.arsnb.cc:8080

Targets

    • Target

      d33d8e661e9117698f00b1635c7e42171ae5a2738ee40fb4cae28cdfed7e3447.elf

    • Size

      5.2MB

    • MD5

      dabf6b48ef6b1e2583a8162b903d6264

    • SHA1

      42afd0b2022cfc5288b311336f29bed03302ee9b

    • SHA256

      d33d8e661e9117698f00b1635c7e42171ae5a2738ee40fb4cae28cdfed7e3447

    • SHA512

      b447b36497d491058970c8c6f3e1b81b516a8d7a99a9ae31c53289fa5b27619bdb14b454f31650db9abf486ca28b98a10f7dc50df08598733676bdc2cb9e9229

    • SSDEEP

      49152:7Xa6xzZWhrb/T4vO90dL3BmAFd4A64nsfJPJ6TdXnT9aqeJaz2xNkapDnYRQoj1+:b2ONLBzSxtSTIElHz

    • Kaiji

      Kaiji payload

    • Kaiji family

    • kaiji_chaosbot

      Chaos-variant payload

    • Executes dropped EXE

    • Modifies Watchdog functionality

      Malware like Mirai modifies the Watchdog to prevent it restarting an infected system.

    • Creates/modifies Cron job

      Cron allows running tasks on a schedule, and is commonly used for malware persistence.

    • Creates/modifies environment variables

      Creating/modifying environment variables is a common persistence mechanism.

    • Enumerates running processes

      Discovers information about currently running processes on the system

    • Modifies init.d

      Adds/modifies system service, likely for persistence.

    • Modifies systemd

      Adds/ modifies systemd service files. Likely to achieve persistence.

    • Write file to user bin folder

    • Modifies Bash startup script

MITRE ATT&CK Enterprise v15

Tasks