Overview

overview

10

Static

static

10

a3b2902fee...6a.elf

debian-12-mipsel

10

Analysis

  • max time kernel
    116s
  • max time network
    128s
  • platform
    debian-12_mipsel
  • resource
    debian12-mipsel-20260126-en
  • resource tags

    arch:mipselimage:debian12-mipsel-20260126-enkernel:6.1.0-17-4kc-maltalocale:en-usos:debian-12-mipselsystem
  • submitted
    25/04/2026, 16:15

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General

  • Target
    a3b2902feee9e5b31f8d180f25795bcecbe9ca4eb15eb9eb585247a1d3196f6a.elf
  • Size 134KB
  • Sample260425-tp63cafx2p
  • SHA256 a3b2902feee9e5b31f8d180f25795bcecbe9ca4eb15eb9eb585247a1d3196f6a
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
botnetcredential_accessdefense_evasiondiscoveryexecutionmiraipersistenceprivilege_escalation

Malware Config

Signatures

  • Family: Mirai

    Mirai is a prevalent Linux malware infecting exposed network devices.

    botnetmirai
  • Contacts a large (46594) amount of remote hosts 1 TTPs

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

    discovery
  • Creates a large amount of network flows 1 TTPs

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

    discovery
  • Modifies Watchdog functionality 1 TTPs 2 IoCs

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

    defense_evasion
  • Creates/modifies Cron job 1 TTPs 3 IoCs

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

    executionpersistenceprivilege_escalation
  • Creates/modifies environment variables 1 TTPs 1 IoCs

    Creating/modifying environment variables is a common persistence mechanism.

    persistenceprivilege_escalationdefense_evasion
  • Enumerates active TCP sockets 1 TTPs 1 IoCs

    Gets active TCP sockets from /proc virtual filesystem.

    discovery
  • 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.

    persistence
  • Modifies rc script 2 TTPs 1 IoCs

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

    persistence
  • Write file to user bin folder 1 IoCs
    persistence
  • Modifies Bash startup script 2 TTPs 1 IoCs
    persistence
  • Reads process memory 1 TTPs 64 IoCs

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

    credential_access
  • Changes its process name 64 IoCs
  • Reads system network configuration 1 TTPs 1 IoCs

    Uses contents of /proc filesystem to enumerate network settings.

    discovery
  • Reads runtime system information 8 IoCs

    Reads data from /proc virtual filesystem.

    discovery

Processes

  • /tmp/a3b2902feee9e5b31f8d180f25795bcecbe9ca4eb15eb9eb585247a1d3196f6a.elf
    /tmp/a3b2902feee9e5b31f8d180f25795bcecbe9ca4eb15eb9eb585247a1d3196f6a.elf
    1⤵
    • Modifies Watchdog functionality
    • Creates/modifies Cron job
    • Creates/modifies environment variables
    • Enumerates active TCP sockets
    • Modifies init.d
    • Modifies rc script
    • Write file to user bin folder
    • Modifies Bash startup script
    • Reads process memory
    • Changes its process name
    • Reads system network configuration
    • Reads runtime system information
    PID:797
    • /bin/sh
      sh -c "(crontab -l 2>/dev/null | grep -v \"/var/run/.systemd-udevd\"; echo \"@reboot /var/run/.systemd-udevd\") | crontab - 2>/dev/null"
      2⤵
        PID:806
        • /usr/bin/crontab
          crontab -
          3⤵
          • Creates/modifies Cron job
          PID:811
        • /usr/bin/crontab
          crontab -l
          3⤵
            PID:810
          • /usr/bin/grep
            grep -v /var/run/.systemd-udevd
            3⤵
            • Reads runtime system information
            PID:812
        • /bin/sh
          sh -c "update-rc.d syslog-helper defaults >/dev/null 2>&1"
          2⤵
            PID:816
            • /usr/sbin/update-rc.d
              update-rc.d syslog-helper defaults
              3⤵
                PID:819
                • /usr/local/sbin/systemctl
                  systemctl daemon-reload
                  4⤵
                    PID:842
                  • /usr/local/bin/systemctl
                    systemctl daemon-reload
                    4⤵
                      PID:842
                    • /usr/sbin/systemctl
                      systemctl daemon-reload
                      4⤵
                        PID:842
                      • /usr/bin/systemctl
                        systemctl daemon-reload
                        4⤵
                        • Reads runtime system information
                        PID:842
                  • /bin/sh
                    sh -c "ln -sf /etc/init.d/syslog-helper /etc/rc.d/S99syslog-helper 2>/dev/null"
                    2⤵
                      PID:861
                      • /usr/bin/ln
                        ln -sf /etc/init.d/syslog-helper /etc/rc.d/S99syslog-helper
                        3⤵
                          PID:862
                      • /bin/sh
                        sh -c "ln -sf /etc/init.d/syslog-helper /etc/rc.d/K10syslog-helper 2>/dev/null"
                        2⤵
                          PID:863
                          • /usr/bin/ln
                            ln -sf /etc/init.d/syslog-helper /etc/rc.d/K10syslog-helper
                            3⤵
                              PID:864
                          • /bin/sh
                            sh -c "chkconfig syslog-helper on >/dev/null 2>&1"
                            2⤵
                              PID:865

                          Network

                                MITRE ATT&CK Enterprise v16

                                Reconnaissance

                                Resource Development

                                Initial Access

                                Execution

                                Scheduled Task/Job

                                1
                                T1053

                                Cron

                                1
                                T1053.003

                                Persistence

                                Boot or Logon Autostart Execution

                                3
                                T1547

                                Boot or Logon Initialization Scripts

                                2
                                T1037

                                RC Scripts

                                2
                                T1037.004

                                Event Triggered Execution

                                1
                                T1546

                                Unix Shell Configuration Modification

                                1
                                T1546.004

                                Hijack Execution Flow

                                1
                                T1574

                                Path Interception by PATH Environment Variable

                                1
                                T1574.007

                                Scheduled Task/Job

                                1
                                T1053

                                Cron

                                1
                                T1053.003

                                Privilege Escalation

                                Boot or Logon Autostart Execution

                                3
                                T1547

                                Boot or Logon Initialization Scripts

                                2
                                T1037

                                RC Scripts

                                2
                                T1037.004

                                Event Triggered Execution

                                1
                                T1546

                                Unix Shell Configuration Modification

                                1
                                T1546.004

                                Hijack Execution Flow

                                1
                                T1574

                                Path Interception by PATH Environment Variable

                                1
                                T1574.007

                                Scheduled Task/Job

                                1
                                T1053

                                Cron

                                1
                                T1053.003

                                Defense Evasion

                                Hijack Execution Flow

                                1
                                T1574

                                Path Interception by PATH Environment Variable

                                1
                                T1574.007

                                Impair Defenses

                                1
                                T1562

                                Credential Access

                                OS Credential Dumping

                                1
                                T1003

                                Proc Filesystem

                                1
                                T1003.007

                                Discovery

                                Network Service Discovery

                                2
                                T1046

                                System Network Configuration Discovery

                                1
                                T1016

                                Internet Connection Discovery

                                1
                                T1016.001

                                System Network Connections Discovery

                                1
                                T1049

                                Lateral Movement

                                Collection

                                Command and Control

                                Exfiltration

                                Impact

                                Replay Monitor

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                                Downloads

                                syslog-helper
                                • Path /etc/init.d/syslog-helper
                                • Size 268B
                                • SHA256 0401a8c82e5c5ce294616e42d18f1b18933e962eeb58067fa72cbe4a634ec4f7
                                • MD5 SHA1 SHA512 TLSH
                                Submit Download

                                katana.sh
                                • Path /etc/profile.d/katana.sh
                                • Size 36B
                                • SHA256 f2db0aee5fa88fad4ca899544eb82614cbb30904e4d7c05db46f0b589b1a79c9
                                • MD5 SHA1 SHA512
                                Submit Download

                                .systemd-udevd
                                • Path /run/.systemd-udevd
                                • Size 134KB
                                • SHA256 a3b2902feee9e5b31f8d180f25795bcecbe9ca4eb15eb9eb585247a1d3196f6a
                                • MD5 SHA1 SHA512 SSDEEP TLSH
                                Submit Download

                                root
                                • Path /var/spool/cron/crontabs/root
                                • Size 239B
                                • SHA256 755d7fa05550b76204155ac024dee4c3185480c9715740e7d528694ef2374354
                                • MD5 SHA1 SHA512 TLSH
                                Submit Download

                                tmp.yZoCSL
                                • Path /var/spool/cron/crontabs/tmp.yZoCSL
                                • Size 207B
                                • SHA256 d0a28f7d9ab6ccafb0cdabfe14578d90bb382db2512cb59bb5e6d3bd2ad097f8
                                • MD5 SHA1 SHA512 TLSH
                                Submit Download