General

  • Target

    linux_386.elf

  • Size

    5.0MB

  • Sample

    250320-3e33datrw3

  • MD5

    21ef8d4e6816e58f43beb0aee2422366

  • SHA1

    0fcb6e72f604ab6e2afef0a40433b06a29c373bb

  • SHA256

    e353d704ff45ff8513fa0ce6685d6dcb84cf7921f6173a935c9a312cde206631

  • SHA512

    e091ba1d17ca25af8718114884fa6c0724bc08c561df2adc80d4994eeb37ee2a16000c07c3bf91429c17a800e1af993a12f2a5be0696cb1459f86fdc0a7c8f3b

  • SSDEEP

    49152:E33d0lGt6UHcFL7Rn2o03wiEhiDmzzd/9sARlBs/00Cpfx9a9uN+p9hW16klbU6V:E33GlbU8FwmzzRDZ9mpqRV

Malware Config

Extracted

Family

kaiji

C2

156.225.31.175:808

Targets

    • Target

      linux_386.elf

    • Size

      5.0MB

    • MD5

      21ef8d4e6816e58f43beb0aee2422366

    • SHA1

      0fcb6e72f604ab6e2afef0a40433b06a29c373bb

    • SHA256

      e353d704ff45ff8513fa0ce6685d6dcb84cf7921f6173a935c9a312cde206631

    • SHA512

      e091ba1d17ca25af8718114884fa6c0724bc08c561df2adc80d4994eeb37ee2a16000c07c3bf91429c17a800e1af993a12f2a5be0696cb1459f86fdc0a7c8f3b

    • SSDEEP

      49152:E33d0lGt6UHcFL7Rn2o03wiEhiDmzzd/9sARlBs/00Cpfx9a9uN+p9hW16klbU6V:E33GlbU8FwmzzRDZ9mpqRV

    • 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