Analysis

  • max time kernel
    11965s
  • max time network
    168s
  • platform
    linux_mips
  • resource
    debian9-mipsbe-en-20211208
  • submitted
    25-04-2022 23:13

General

  • Target

    Mozi.mmjvcjszc

  • Size

    106KB

  • MD5

    4dde761681684d7edad4e5e1ffdb940b

  • SHA1

    2327be693bc11a618c380d7d3abc2382d870d48b

  • SHA256

    d546509ab6670f9ff31783ed72875dfc0f37fa2b666bd5870eecaaed2ebea4a8

  • SHA512

    91a61c719128f263f9f95736d55895954cc468c74ff469ee061d35ec382c50b9165e9a5427dc46a835dac6ae0e6e1f9819632475f68b98a907b53196bd4eb02a

Malware Config

Signatures

  • Contacts a large (10832) amount of remote hosts 1 TTPs

    This may indicate a network scan to discover remotely running services.

  • Modifies the Watchdog daemon 1 TTPs

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

  • Writes file to system bin folder 1 TTPs 2 IoCs
  • Modifies hosts file 1 IoCs

    Adds to hosts file used for mapping hosts to IP addresses.

  • Writes DNS configuration 1 TTPs 1 IoCs

    Writes data to DNS resolver config file.

  • Enumerates active TCP sockets 1 TTPs 1 IoCs

    Gets active TCP sockets from /proc virtual filesystem.

  • Modifies init.d 1 TTPs 1 IoCs

    Adds/modifies system service, likely for persistence.

  • Reads system routing table 1 TTPs 1 IoCs

    Gets active network interfaces from /proc virtual filesystem.

  • Creates a large amount of network flows 1 TTPs

    This may indicate a network scan to discover remotely running services.

  • Reads system network configuration 1 TTPs 3 IoCs

    Uses contents of /proc filesystem to enumerate network settings.

  • Writes file to tmp directory 2 IoCs

    Malware often drops required files in the /tmp directory.

Processes

  • ./Mozi.mmjvcjszc
    ./Mozi.mmjvcjszc
    1⤵
      PID:324
    • /bin/sh
      sh -c "iptables -I INPUT -p tcp --destination-port 22 -j DROP"
      1⤵
        PID:332
        • /sbin/iptables
          iptables -I INPUT -p tcp --destination-port 22 -j DROP
          2⤵
            PID:333
        • /bin/sh
          sh -c "iptables -I INPUT -p tcp --destination-port 23 -j DROP"
          1⤵
            PID:342
            • /sbin/iptables
              iptables -I INPUT -p tcp --destination-port 23 -j DROP
              2⤵
                PID:343
            • /bin/sh
              sh -c "iptables -I INPUT -p tcp --destination-port 2323 -j DROP"
              1⤵
                PID:344
                • /sbin/iptables
                  iptables -I INPUT -p tcp --destination-port 2323 -j DROP
                  2⤵
                    PID:345
                • /bin/sh
                  sh -c "iptables -I OUTPUT -p tcp --source-port 22 -j DROP"
                  1⤵
                    PID:346
                    • /sbin/iptables
                      iptables -I OUTPUT -p tcp --source-port 22 -j DROP
                      2⤵
                        PID:347
                    • /bin/sh
                      sh -c "iptables -I OUTPUT -p tcp --source-port 23 -j DROP"
                      1⤵
                        PID:348
                        • /sbin/iptables
                          iptables -I OUTPUT -p tcp --source-port 23 -j DROP
                          2⤵
                            PID:349
                        • /bin/sh
                          sh -c "iptables -I OUTPUT -p tcp --source-port 2323 -j DROP"
                          1⤵
                            PID:350
                            • /sbin/iptables
                              iptables -I OUTPUT -p tcp --source-port 2323 -j DROP
                              2⤵
                                PID:351
                            • /bin/sh
                              sh -c "iptables -I INPUT -p tcp --destination-port 58000 -j DROP"
                              1⤵
                                PID:352
                                • /sbin/iptables
                                  iptables -I INPUT -p tcp --destination-port 58000 -j DROP
                                  2⤵
                                    PID:353
                                • /bin/sh
                                  sh -c "iptables -I OUTPUT -p tcp --source-port 58000 -j DROP"
                                  1⤵
                                    PID:354
                                    • /sbin/iptables
                                      iptables -I OUTPUT -p tcp --source-port 58000 -j DROP
                                      2⤵
                                        PID:355
                                    • /bin/sh
                                      sh -c "cfgtool set /mnt/jffs2/hw_ctree.xml InternetGatewayDevice.ManagementServer URL \"http://127.0.0.1\""
                                      1⤵
                                        PID:356
                                      • /bin/sh
                                        sh -c "cfgtool set /mnt/jffs2/hw_ctree.xml InternetGatewayDevice.ManagementServer ConnectionRequestPassword \"acsMozi\""
                                        1⤵
                                          PID:357
                                        • /bin/sh
                                          sh -c "iptables -I INPUT -p tcp --destination-port 35000 -j DROP"
                                          1⤵
                                            PID:358
                                            • /sbin/iptables
                                              iptables -I INPUT -p tcp --destination-port 35000 -j DROP
                                              2⤵
                                                PID:359
                                            • /bin/sh
                                              sh -c "iptables -I INPUT -p tcp --destination-port 50023 -j DROP"
                                              1⤵
                                                PID:360
                                                • /sbin/iptables
                                                  iptables -I INPUT -p tcp --destination-port 50023 -j DROP
                                                  2⤵
                                                    PID:361
                                                • /bin/sh
                                                  sh -c "iptables -I OUTPUT -p tcp --source-port 50023 -j DROP"
                                                  1⤵
                                                    PID:362
                                                    • /sbin/iptables
                                                      iptables -I OUTPUT -p tcp --source-port 50023 -j DROP
                                                      2⤵
                                                        PID:363
                                                    • /bin/sh
                                                      sh -c "iptables -I OUTPUT -p tcp --source-port 35000 -j DROP"
                                                      1⤵
                                                        PID:364
                                                        • /sbin/iptables
                                                          iptables -I OUTPUT -p tcp --source-port 35000 -j DROP
                                                          2⤵
                                                            PID:365
                                                        • /bin/sh
                                                          sh -c "iptables -I INPUT -p tcp --destination-port 7547 -j DROP"
                                                          1⤵
                                                            PID:366
                                                            • /sbin/iptables
                                                              iptables -I INPUT -p tcp --destination-port 7547 -j DROP
                                                              2⤵
                                                                PID:367
                                                            • /bin/sh
                                                              sh -c "iptables -I OUTPUT -p tcp --source-port 7547 -j DROP"
                                                              1⤵
                                                                PID:368
                                                                • /sbin/iptables
                                                                  iptables -I OUTPUT -p tcp --source-port 7547 -j DROP
                                                                  2⤵
                                                                    PID:369
                                                                • /bin/sh
                                                                  sh -c "iptables -I INPUT -p tcp --destination-port 55513 -j ACCEPT"
                                                                  1⤵
                                                                    PID:370
                                                                    • /sbin/iptables
                                                                      iptables -I INPUT -p tcp --destination-port 55513 -j ACCEPT
                                                                      2⤵
                                                                        PID:371
                                                                    • /bin/sh
                                                                      sh -c "iptables -I OUTPUT -p tcp --source-port 55513 -j ACCEPT"
                                                                      1⤵
                                                                        PID:372
                                                                        • /sbin/iptables
                                                                          iptables -I OUTPUT -p tcp --source-port 55513 -j ACCEPT
                                                                          2⤵
                                                                            PID:373
                                                                        • /bin/sh
                                                                          sh -c "iptables -I PREROUTING -t nat -p tcp --destination-port 55513 -j ACCEPT"
                                                                          1⤵
                                                                            PID:374
                                                                            • /sbin/iptables
                                                                              iptables -I PREROUTING -t nat -p tcp --destination-port 55513 -j ACCEPT
                                                                              2⤵
                                                                                PID:375
                                                                            • /bin/sh
                                                                              sh -c "iptables -I POSTROUTING -t nat -p tcp --source-port 55513 -j ACCEPT"
                                                                              1⤵
                                                                                PID:382
                                                                                • /sbin/iptables
                                                                                  iptables -I POSTROUTING -t nat -p tcp --source-port 55513 -j ACCEPT
                                                                                  2⤵
                                                                                    PID:383
                                                                                • /bin/sh
                                                                                  sh -c "iptables -I INPUT -p udp --destination-port 8082 -j ACCEPT"
                                                                                  1⤵
                                                                                    PID:384
                                                                                    • /sbin/iptables
                                                                                      iptables -I INPUT -p udp --destination-port 8082 -j ACCEPT
                                                                                      2⤵
                                                                                        PID:385
                                                                                    • /bin/sh
                                                                                      sh -c "iptables -I OUTPUT -p udp --source-port 8082 -j ACCEPT"
                                                                                      1⤵
                                                                                        PID:386
                                                                                        • /sbin/iptables
                                                                                          iptables -I OUTPUT -p udp --source-port 8082 -j ACCEPT
                                                                                          2⤵
                                                                                            PID:387
                                                                                        • /bin/sh
                                                                                          sh -c "iptables -I PREROUTING -t nat -p udp --destination-port 8082 -j ACCEPT"
                                                                                          1⤵
                                                                                            PID:388
                                                                                            • /sbin/iptables
                                                                                              iptables -I PREROUTING -t nat -p udp --destination-port 8082 -j ACCEPT
                                                                                              2⤵
                                                                                                PID:389
                                                                                            • /bin/sh
                                                                                              sh -c "iptables -I POSTROUTING -t nat -p udp --source-port 8082 -j ACCEPT"
                                                                                              1⤵
                                                                                                PID:390
                                                                                                • /sbin/iptables
                                                                                                  iptables -I POSTROUTING -t nat -p udp --source-port 8082 -j ACCEPT
                                                                                                  2⤵
                                                                                                    PID:391

                                                                                                Network

                                                                                                MITRE ATT&CK Matrix ATT&CK v6

                                                                                                Persistence

                                                                                                Hijack Execution Flow

                                                                                                1
                                                                                                T1574

                                                                                                Boot or Logon Autostart Execution

                                                                                                1
                                                                                                T1547

                                                                                                Privilege Escalation

                                                                                                Hijack Execution Flow

                                                                                                1
                                                                                                T1574

                                                                                                Boot or Logon Autostart Execution

                                                                                                1
                                                                                                T1547

                                                                                                Defense Evasion

                                                                                                Impair Defenses

                                                                                                1
                                                                                                T1562

                                                                                                Hijack Execution Flow

                                                                                                1
                                                                                                T1574

                                                                                                Discovery

                                                                                                Network Service Scanning

                                                                                                2
                                                                                                T1046

                                                                                                System Network Connections Discovery

                                                                                                1
                                                                                                T1049

                                                                                                System Network Configuration Discovery

                                                                                                2
                                                                                                T1016

                                                                                                Command and Control

                                                                                                Dynamic Resolution

                                                                                                1
                                                                                                T1568

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