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Overview

overview

10

Static

static

10

linux_386.elf

ubuntu-22.04-amd64

10

Analysis

  • max time kernel
    149s
  • max time network
    148s
  • platform
    ubuntu-22.04_amd64
  • resource
    ubuntu2204-amd64-20240729-en
  • resource tags

    arch:amd64arch:i386image:ubuntu2204-amd64-20240729-enkernel:5.15.0-105-genericlocale:en-usos:ubuntu-22.04-amd64system
  • submitted
    25/11/2024, 22:46

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General

  • Target

    linux_386.elf

  • Size

    5.0MB

  • MD5

    f5c59e70b89c03eb69f02a7be662ed59

  • SHA1

    f1dc3d2d6c85692a2419517d3473bb370cf86510

  • SHA256

    ae49891720a4fa75f48a58efd4fc5dcd369f8c99add24e781191616f46149457

  • SHA512

    69a1fcdc968d5b2f2706a0c6294974d2cc211910033e8bd991ec9dad01eacf93b20dfb3c72f17130b29b53a8b1add45f04a6c1c7e1f81ff9f198184493354225

  • SSDEEP

    49152:E33d0lGt6UHcFL7Rn2o03wiEhiDmzzd/9sARlBs/00Cpfx9a9uNFp9hW16klbU6V:E33GlbU8FwmzzRDZ9mWqRV

Score
10/10
kaijidefense_evasiondiscoveryexecutionpersistenceprivilege_escalatioprivilege_escalation

Malware Config

Extracted

Family

kaiji

C2

aras.liveya.org:52462

Signatures

  • Kaiji 1 IoCs

    Kaiji payload

  • Kaiji family
    kaiji
  • kaiji_chaosbot 1 IoCs

    Chaos-variant payload

  • Executes dropped EXE 1 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 1 IoCs

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

    executionpersistenceprivilege_escalatio
  • Creates/modifies environment variables 1 TTPs 3 IoCs

    Creating/modifying environment variables is a common persistence mechanism.

    persistenceprivilege_escalationdefense_evasion
  • Enumerates running processes

    Discovers information about currently running processes on the system

  • Modifies init.d 2 TTPs 2 IoCs

    Adds/modifies system service, likely for persistence.

    persistence
  • Modifies systemd 2 TTPs 1 IoCs

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

    persistenceprivilege_escalation
  • Write file to user bin folder 6 IoCs
    persistence
  • Modifies Bash startup script 2 TTPs 3 IoCs
    persistence
  • Changes its process name 1 IoCs
  • Enumerates kernel/hardware configuration 1 TTPs 2 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
  • GoLang User-Agent 1 IoCs

    Uses default user-agent string defined by GoLang HTTP packages.

Processes

  • /tmp/linux_386.elf
    /tmp/linux_386.elf
    1⤵
    • Enumerates kernel/hardware configuration
    PID:1562
    • /usr/bin/sh
      sh -c "/etc/32678&"
      2⤵
        PID:1566
      • /usr/sbin/service
        service crond start
        2⤵
          PID:1567
          • /usr/bin/basename
            basename /usr/sbin/service
            3⤵
              PID:1570
            • /usr/bin/basename
              basename /usr/sbin/service
              3⤵
                PID:1572
              • /usr/bin/sed
                sed -ne "s/\\.socket\\s*[a-z]*\\s*\$/.socket/p"
                3⤵
                • Reads runtime system information
                PID:1581
              • /usr/bin/systemctl
                systemctl list-unit-files --full "--type=socket"
                3⤵
                • Reads runtime system information
                PID:1579
            • /tmp/linux_386.elf
              /tmp/linux_386.elf " "
              2⤵
              • Modifies Watchdog functionality
              • Creates/modifies environment variables
              • Modifies init.d
              • Modifies systemd
              • Write file to user bin folder
              • Modifies Bash startup script
              • Changes its process name
              • Enumerates kernel/hardware configuration
              • Reads runtime system information
              PID:1569
              • /usr/sbin/update-rc.d
                update-rc.d linux_kill defaults
                3⤵
                  PID:1583
                  • /usr/local/sbin/systemctl
                    systemctl daemon-reload
                    4⤵
                      PID:1584
                    • /usr/local/bin/systemctl
                      systemctl daemon-reload
                      4⤵
                        PID:1584
                      • /usr/sbin/systemctl
                        systemctl daemon-reload
                        4⤵
                          PID:1584
                        • /usr/bin/systemctl
                          systemctl daemon-reload
                          4⤵
                            PID:1584
                        • /usr/bin/sh
                          sh -c "cd /boot;systemctl daemon-reload;systemctl enable linux.service;systemctl start linux.service;journalctl -xe --no-pager"
                          3⤵
                            PID:1621
                            • /usr/bin/systemctl
                              systemctl daemon-reload
                              4⤵
                                PID:1622
                              • /usr/bin/systemctl
                                systemctl enable linux.service
                                4⤵
                                  PID:1662
                                • /usr/bin/systemctl
                                  systemctl start linux.service
                                  4⤵
                                    PID:1700
                                  • /usr/bin/journalctl
                                    journalctl -xe --no-pager
                                    4⤵
                                      PID:1716
                                  • /usr/bin/sh
                                    sh -c "cd /boot;ausearch -c 'System.img.conf' --raw | audit2allow -M my-Systemimgconf;semodule -X 300 -i my-Systemimgconf.pp"
                                    3⤵
                                      PID:1724
                                    • /usr/bin/bash
                                      bash -c "echo \"*/1 * * * * root /.img \" >> /etc/crontab"
                                      3⤵
                                      • Creates/modifies Cron job
                                      PID:1727
                                    • /usr/bin/renice
                                      renice -20 1569
                                      3⤵
                                        PID:1728
                                      • /usr/bin/mount
                                        mount -o bind /tmp/ /proc/1569
                                        3⤵
                                        • Reads runtime system information
                                        PID:1729
                                      • /usr/sbin/service
                                        service cron start
                                        3⤵
                                          PID:1731
                                          • /usr/bin/basename
                                            basename /usr/sbin/service
                                            4⤵
                                              PID:1732
                                            • /usr/bin/basename
                                              basename /usr/sbin/service
                                              4⤵
                                                PID:1733
                                              • /usr/bin/sed
                                                sed -ne "s/\\.socket\\s*[a-z]*\\s*\$/.socket/p"
                                                4⤵
                                                • Reads runtime system information
                                                PID:1736
                                              • /usr/bin/systemctl
                                                systemctl list-unit-files --full "--type=socket"
                                                4⤵
                                                  PID:1735
                                              • /usr/local/sbin/systemctl
                                                systemctl start cron.service
                                                3⤵
                                                  PID:1731
                                                • /usr/local/bin/systemctl
                                                  systemctl start cron.service
                                                  3⤵
                                                    PID:1731
                                                  • /usr/sbin/systemctl
                                                    systemctl start cron.service
                                                    3⤵
                                                      PID:1731
                                                    • /usr/bin/systemctl
                                                      systemctl start cron.service
                                                      3⤵
                                                        PID:1731
                                                      • /usr/bin/systemctl
                                                        systemctl start crond.service
                                                        3⤵
                                                          PID:1737
                                                    • /etc/32678
                                                      /etc/32678
                                                      1⤵
                                                      • Executes dropped EXE
                                                      PID:1568
                                                      • /usr/bin/sleep
                                                        sleep 60
                                                        2⤵
                                                          PID:1571
                                                      • /usr/local/sbin/systemctl
                                                        systemctl start crond.service
                                                        1⤵
                                                          PID:1567
                                                        • /usr/local/bin/systemctl
                                                          systemctl start crond.service
                                                          1⤵
                                                            PID:1567
                                                          • /usr/sbin/systemctl
                                                            systemctl start crond.service
                                                            1⤵
                                                              PID:1567
                                                            • /usr/bin/systemctl
                                                              systemctl start crond.service
                                                              1⤵
                                                                PID:1567

                                                              Network

                                                              MITRE ATT&CK Enterprise v15

                                                              Reconnaissance

                                                              Resource Development

                                                              Initial Access

                                                              Execution

                                                              Scheduled Task/Job

                                                              1
                                                              T1053

                                                              Cron

                                                              1
                                                              T1053.003

                                                              Persistence

                                                              Boot or Logon Autostart Execution

                                                              3
                                                              T1547

                                                              XDG Autostart Entries

                                                              1
                                                              T1547.013

                                                              Boot or Logon Initialization Scripts

                                                              1
                                                              T1037

                                                              RC Scripts

                                                              1
                                                              T1037.004

                                                              Create or Modify System Process

                                                              1
                                                              T1543

                                                              Systemd Service

                                                              1
                                                              T1543.002

                                                              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

                                                              XDG Autostart Entries

                                                              1
                                                              T1547.013

                                                              Boot or Logon Initialization Scripts

                                                              1
                                                              T1037

                                                              RC Scripts

                                                              1
                                                              T1037.004

                                                              Create or Modify System Process

                                                              1
                                                              T1543

                                                              Systemd Service

                                                              1
                                                              T1543.002

                                                              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

                                                              Discovery

                                                              System Information Discovery

                                                              1
                                                              T1082

                                                              Lateral Movement

                                                              Collection

                                                              Command and Control

                                                              Exfiltration

                                                              Impact

                                                              Replay Monitor

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                                                              Downloads

                                                              • /.img
                                                                Filesize

                                                                33B

                                                                MD5

                                                                d73d3376908ea075a939e3871ad0fabe

                                                                SHA1

                                                                320ff65831247ba199515f1b94df26cc8a3e5f76

                                                                SHA256

                                                                edbdabe30d8236a2c0a4eb89dfd597552130e4c1a4e93f8fe1568920442ad73a

                                                                SHA512

                                                                57b83fef88620598beb5d65626bf757d0abef242d2d6a01796a61474dedc5095a4a9d0f292b6abb450cad3d4410ab8456253600f58ddb66cfe6d79e1c8415536

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                                                              • /boot/System.img.config
                                                                Filesize

                                                                5.0MB

                                                                MD5

                                                                f5c59e70b89c03eb69f02a7be662ed59

                                                                SHA1

                                                                f1dc3d2d6c85692a2419517d3473bb370cf86510

                                                                SHA256

                                                                ae49891720a4fa75f48a58efd4fc5dcd369f8c99add24e781191616f46149457

                                                                SHA512

                                                                69a1fcdc968d5b2f2706a0c6294974d2cc211910033e8bd991ec9dad01eacf93b20dfb3c72f17130b29b53a8b1add45f04a6c1c7e1f81ff9f198184493354225

                                                                Download Submit

                                                              • /etc/32678
                                                                Filesize

                                                                61B

                                                                MD5

                                                                768eaf287796da19e1cf5e0b2fb1b161

                                                                SHA1

                                                                6a1ce2ee5ccc86d1f33806feb14547b35290df2a

                                                                SHA256

                                                                1d22620dfb2a6715e5d745aed5cf841ede0e75e1747f12b9b925a2d346bc7ecb

                                                                SHA512

                                                                e6af30c9df4f7f47696069511e64ecbc8e841629d692ee4056503df3533fb7a7a74960698826260355e1dba7b6c562482a27a39bb51a4237473ce4b68472d620

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                                                              • /etc/init.d/linux_kill
                                                                Filesize

                                                                189B

                                                                MD5

                                                                3909975f7cc0d1121c1819b800069f31

                                                                SHA1

                                                                3e68de708c2e6c40fab6794afdee3104e5590189

                                                                SHA256

                                                                6876dac71f13a068afb863d257134275f2edba43b2acaf4924fabf97c079070b

                                                                SHA512

                                                                50600cceeb03b05f45ae61d890caee9f51ff390b6776930866e527e071d65d08241fc66673fd9b99d62fbc77d3c00fc3de4d7378cbc42f5daba5d83072b0906e

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                                                              • /etc/profile.d/bash_config.sh
                                                                Filesize

                                                                37B

                                                                MD5

                                                                cfb4e51061485fe91169381fbdc1538e

                                                                SHA1

                                                                9a85b9b766a15b01737a41d680e4593b7a9bde87

                                                                SHA256

                                                                897f37267d0ceaa2fbdaa09847f5d08e6f8b01a0348a0d666264b0f10acd0c90

                                                                SHA512

                                                                fb154ec711d2090a7461da4db8ddad2b522649a27e74162ecb203f539b1729430288bc02d78d2071bde9c4bbc005693403a57612ef50277d52f816cb94524216

                                                                Download Submit