Overview

overview

7

Static

static

5

arm5.elf

debian-12-armhf

7

Analysis

  • max time kernel
    149s
  • max time network
    146s
  • platform
    debian-12_armhf
  • resource
    debian12-armhf-20260513-en
  • resource tags

    arch:armhfimage:debian12-armhf-20260513-enkernel:6.1.0-17-armmp-lpaelocale:en-usos:debian-12-armhfsystem
  • submitted
    24/09/2026, 16:50

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General

  • Target
    arm5.elf
  • Size 109KB
  • Sample260924-vce9jaxbme
  • SHA256 8aac20eac37f21e01352c0ab95e2db43da09fb5d6d7a8ae64f7b7927a2ba5c04
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
7/10
credential_accessdefense_evasiondiscoveryexecutionpersistenceprivilege_escalation

Malware Config

Signatures

  • Modifies the /etc/hosts DNS resolution file 1 TTPs 1 IoCs

    Modifying the /etc/hosts name-resolution file changes IP routing, which can facilitate traffic hijacking or the blocking of (security update) endpoints.

  • Creates/modifies Cron job 1 TTPs 1 IoCs

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

    executionpersistenceprivilege_escalation
  • Creates/modifies environment variables 1 TTPs 8 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
  • Modifies systemd 2 TTPs 1 IoCs

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

    persistenceprivilege_escalation
  • Modifies Bash startup script 2 TTPs 8 IoCs
    persistence
  • Reads process memory 1 TTPs 55 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 2 IoCs
  • Reads system network configuration 1 TTPs 1 IoCs

    Uses contents of /proc filesystem to enumerate network settings.

    discovery
  • Enumerates kernel/hardware configuration 1 TTPs 64 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
  • System Network Configuration Discovery 1 TTPs 5 IoCs

    Adversaries may gather information about the network configuration of a system.

    discovery

Processes

  • /tmp/arm5.elf
    /tmp/arm5.elf
    1⤵
    • Modifies the /etc/hosts DNS resolution file
    • Creates/modifies environment variables
    • Enumerates active TCP sockets
    • Modifies init.d
    • Modifies rc script
    • Modifies systemd
    • Modifies Bash startup script
    • Reads process memory
    • Changes its process name
    • Reads system network configuration
    • Enumerates kernel/hardware configuration
    • Reads runtime system information
    PID:791
    • /bin/sh
      sh -c "systemctl daemon-reload 2>/dev/null"
      2⤵
        PID:804
        • /usr/bin/systemctl
          systemctl daemon-reload
          3⤵
            PID:809
        • /bin/sh
          sh -c "killall -9 sshd 2>/dev/null"
          2⤵
            PID:830
          • /bin/sh
            sh -c "killall -9 telnetd 2>/dev/null"
            2⤵
              PID:831
            • /bin/sh
              sh -c "killall -9 dropbear 2>/dev/null"
              2⤵
                PID:832
              • /bin/sh
                sh -c "killall -9 in.telnetd 2>/dev/null"
                2⤵
                  PID:833
                • /bin/sh
                  sh -c "killall -9 lighttpd 2>/dev/null"
                  2⤵
                    PID:834
                  • /bin/sh
                    sh -c "killall -9 nginx 2>/dev/null"
                    2⤵
                      PID:835
                    • /bin/sh
                      sh -c "killall -9 apache2 2>/dev/null"
                      2⤵
                        PID:836
                      • /bin/sh
                        sh -c "killall -9 httpd 2>/dev/null"
                        2⤵
                          PID:837
                        • /bin/sh
                          sh -c "iptables -F 2>/dev/null"
                          2⤵
                          • System Network Configuration Discovery
                          PID:838
                        • /bin/sh
                          sh -c "iptables -X 2>/dev/null"
                          2⤵
                          • System Network Configuration Discovery
                          PID:839
                        • /bin/sh
                          sh -c "iptables -t nat -F 2>/dev/null"
                          2⤵
                          • System Network Configuration Discovery
                          PID:840
                        • /bin/sh
                          sh -c "ip6tables -F 2>/dev/null"
                          2⤵
                          • System Network Configuration Discovery
                          PID:841
                        • /bin/sh
                          sh -c "ip6tables -X 2>/dev/null"
                          2⤵
                          • System Network Configuration Discovery
                          PID:842
                        • /bin/chattr
                          chattr +ia /var/tmp/.cache/sysd
                          2⤵
                            PID:843
                          • /bin/chattr
                            chattr +ia /etc/systemd/system/system-service.service
                            2⤵
                              PID:845
                            • /bin/sh
                              sh -c "systemctl enable system-service 2>/dev/null"
                              2⤵
                                PID:847
                                • /usr/bin/systemctl
                                  systemctl enable system-service
                                  3⤵
                                    PID:848
                                • /bin/sh
                                  sh -c "systemctl restart system-service 2>/dev/null"
                                  2⤵
                                    PID:868
                                    • /usr/bin/systemctl
                                      systemctl restart system-service
                                      3⤵
                                        PID:869
                                    • /bin/sh
                                      sh -c "update-rc.d system-service defaults 2>/dev/null"
                                      2⤵
                                        PID:871
                                        • /usr/sbin/update-rc.d
                                          update-rc.d system-service defaults
                                          3⤵
                                            PID:872
                                            • /usr/local/sbin/systemctl
                                              systemctl daemon-reload
                                              4⤵
                                                PID:873
                                              • /usr/local/bin/systemctl
                                                systemctl daemon-reload
                                                4⤵
                                                  PID:873
                                                • /usr/sbin/systemctl
                                                  systemctl daemon-reload
                                                  4⤵
                                                    PID:873
                                                  • /usr/bin/systemctl
                                                    systemctl daemon-reload
                                                    4⤵
                                                      PID:873
                                                • /bin/sh
                                                  sh -c "[ -d /etc/rc.d ] && ln -sf /etc/init.d/system-service /etc/rc.d/S99system-service 2>/dev/null"
                                                  2⤵
                                                    PID:890
                                                  • /bin/sh
                                                    sh -c "crontab -l 2>/dev/null"
                                                    2⤵
                                                      PID:891
                                                      • /usr/bin/crontab
                                                        crontab -l
                                                        3⤵
                                                          PID:892
                                                      • /bin/sh
                                                        sh -c "(crontab -l 2>/dev/null; echo '* * * * * /var/tmp/.cache/sysd >/dev/null 2>&1 # sysmon') | crontab - 2>/dev/null"
                                                        2⤵
                                                          PID:893
                                                          • /usr/bin/crontab
                                                            crontab -
                                                            3⤵
                                                            • Creates/modifies Cron job
                                                            PID:895
                                                          • /usr/bin/crontab
                                                            crontab -l
                                                            3⤵
                                                              PID:896
                                                        • /bin/busybox
                                                          chattr +ia /var/tmp/.cache/sysd
                                                          1⤵
                                                            PID:844
                                                          • /bin/busybox
                                                            chattr +ia /etc/systemd/system/system-service.service
                                                            1⤵
                                                              PID:846

                                                            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

                                                                  4
                                                                  T1547

                                                                  XDG Autostart Entries

                                                                  1
                                                                  T1547.013

                                                                  Boot or Logon Initialization Scripts

                                                                  2
                                                                  T1037

                                                                  RC Scripts

                                                                  2
                                                                  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

                                                                  4
                                                                  T1547

                                                                  XDG Autostart Entries

                                                                  1
                                                                  T1547.013

                                                                  Boot or Logon Initialization Scripts

                                                                  2
                                                                  T1037

                                                                  RC Scripts

                                                                  2
                                                                  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

                                                                  Credential Access

                                                                  Adversary-in-the-Middle

                                                                  1
                                                                  T1557

                                                                  OS Credential Dumping

                                                                  1
                                                                  T1003

                                                                  Proc Filesystem

                                                                  1
                                                                  T1003.007

                                                                  Discovery

                                                                  System Information Discovery

                                                                  1
                                                                  T1082

                                                                  System Network Configuration Discovery

                                                                  2
                                                                  T1016

                                                                  Internet Connection Discovery

                                                                  1
                                                                  T1016.001

                                                                  System Network Connections Discovery

                                                                  1
                                                                  T1049

                                                                  Lateral Movement

                                                                  Collection

                                                                  Adversary-in-the-Middle

                                                                  1
                                                                  T1557

                                                                  Command and Control

                                                                  Exfiltration

                                                                  Impact

                                                                  Replay Monitor

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                                                                  Downloads

                                                                  system-service
                                                                  • Path /etc/init.d/system-service
                                                                  • Size 281B
                                                                  • SHA256 6b12b3aebe89a8b83f17aac06db83faacbb3d304071eaa5e0be2360506537750
                                                                  • MD5 SHA1 SHA512 TLSH
                                                                  Submit Download

                                                                  system-service.service
                                                                  • Path /etc/systemd/system/system-service.service
                                                                  • Size 239B
                                                                  • SHA256 d87189495e7b2df9de53f91d04936b0d0ce05d905d437fa956fa444e89c29616
                                                                  • MD5 SHA1 SHA512 TLSH
                                                                  Submit Download

                                                                  .ashrc
                                                                  • Path /root/.ashrc
                                                                  • Size 55B
                                                                  • SHA256 e83fa96ab8cabf90d3308cf335055bf6b01737c5d0b87e5e5bec5d097da6c127
                                                                  • MD5 SHA1 SHA512
                                                                  Submit Download

                                                                  tmp.rjzg5G
                                                                  • Path /var/spool/cron/crontabs/tmp.rjzg5G
                                                                  • Size 231B
                                                                  • SHA256 01ae00e56ade85aeb9359ba13fc4eb0ec21e77644175c83cb2a00a52d5aafc4a
                                                                  • MD5 SHA1 SHA512 TLSH
                                                                  Submit Download

                                                                  sysd
                                                                  • Path /var/tmp/.cache/sysd
                                                                  • Size 69KB
                                                                  • SHA256 bfc4163c91825a4267554d612ba739f2b9807e15797082eb549b5e46709587c4
                                                                  • MD5 SHA1 SHA512 SSDEEP TLSH
                                                                  Submit Download