Overview

overview

7

Static

static

5

x86.elf

ubuntu-18.04-amd64

7

Analysis

  • max time kernel
    136s
  • max time network
    139s
  • platform
    ubuntu-18.04_amd64
  • resource
    ubuntu1804-amd64-20260513-en
  • resource tags

    arch:amd64arch:i386image:ubuntu1804-amd64-20260513-enkernel:4.15.0-213-genericlocale:en-usos:ubuntu-18.04-amd64system
  • submitted
    24/09/2026, 22:56

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General

  • Target
    x86.elf
  • Size 118KB
  • Sample260924-2wva5atfqa
  • SHA256 6b58617ebfdc97603cacca6448ce63fb9a2d503f78f0f2969adedc2cc121ab59
  • 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 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 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/x86.elf
    /tmp/x86.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:1537
    • /bin/sh
      sh -c "systemctl daemon-reload 2>/dev/null"
      2⤵
        PID:1544
        • /bin/systemctl
          systemctl daemon-reload
          3⤵
            PID:1545
        • /bin/sh
          sh -c "systemctl enable system-service 2>/dev/null"
          2⤵
            PID:1571
            • /bin/systemctl
              systemctl enable system-service
              3⤵
              • Reads runtime system information
              PID:1572
          • /bin/sh
            sh -c "systemctl restart system-service 2>/dev/null"
            2⤵
              PID:1596
              • /bin/systemctl
                systemctl restart system-service
                3⤵
                  PID:1597
              • /bin/sh
                sh -c "update-rc.d system-service defaults 2>/dev/null"
                2⤵
                  PID:1599
                  • /usr/sbin/update-rc.d
                    update-rc.d system-service defaults
                    3⤵
                      PID:1600
                      • /usr/local/sbin/systemctl
                        systemctl daemon-reload
                        4⤵
                          PID:1601
                        • /usr/local/bin/systemctl
                          systemctl daemon-reload
                          4⤵
                            PID:1601
                          • /usr/sbin/systemctl
                            systemctl daemon-reload
                            4⤵
                              PID:1601
                            • /usr/bin/systemctl
                              systemctl daemon-reload
                              4⤵
                                PID:1601
                              • /sbin/systemctl
                                systemctl daemon-reload
                                4⤵
                                  PID:1601
                                • /bin/systemctl
                                  systemctl daemon-reload
                                  4⤵
                                    PID:1601
                              • /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:1622
                                • /bin/sh
                                  sh -c "crontab -l 2>/dev/null"
                                  2⤵
                                    PID:1623
                                    • /usr/bin/crontab
                                      crontab -l
                                      3⤵
                                        PID:1624
                                    • /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:1625
                                        • /usr/bin/crontab
                                          crontab -
                                          3⤵
                                          • Creates/modifies Cron job
                                          PID:1627
                                        • /usr/bin/crontab
                                          crontab -l
                                          3⤵
                                            PID:1628
                                        • /bin/sh
                                          sh -c "killall -9 sshd 2>/dev/null"
                                          2⤵
                                            PID:1630
                                          • /bin/sh
                                            sh -c "killall -9 telnetd 2>/dev/null"
                                            2⤵
                                              PID:1633
                                            • /bin/sh
                                              sh -c "killall -9 dropbear 2>/dev/null"
                                              2⤵
                                                PID:1635
                                              • /bin/sh
                                                sh -c "killall -9 in.telnetd 2>/dev/null"
                                                2⤵
                                                  PID:1637
                                                • /bin/sh
                                                  sh -c "killall -9 lighttpd 2>/dev/null"
                                                  2⤵
                                                    PID:1639
                                                  • /bin/sh
                                                    sh -c "killall -9 nginx 2>/dev/null"
                                                    2⤵
                                                      PID:1641
                                                    • /bin/sh
                                                      sh -c "killall -9 apache2 2>/dev/null"
                                                      2⤵
                                                        PID:1643
                                                      • /bin/sh
                                                        sh -c "killall -9 httpd 2>/dev/null"
                                                        2⤵
                                                          PID:1645
                                                        • /bin/sh
                                                          sh -c "iptables -F 2>/dev/null"
                                                          2⤵
                                                          • System Network Configuration Discovery
                                                          PID:1647
                                                        • /bin/sh
                                                          sh -c "iptables -X 2>/dev/null"
                                                          2⤵
                                                          • System Network Configuration Discovery
                                                          PID:1649
                                                        • /bin/sh
                                                          sh -c "iptables -t nat -F 2>/dev/null"
                                                          2⤵
                                                          • System Network Configuration Discovery
                                                          PID:1651
                                                        • /bin/sh
                                                          sh -c "ip6tables -F 2>/dev/null"
                                                          2⤵
                                                          • System Network Configuration Discovery
                                                          PID:1653
                                                        • /bin/sh
                                                          sh -c "ip6tables -X 2>/dev/null"
                                                          2⤵
                                                          • System Network Configuration Discovery
                                                          PID:1655
                                                      • /usr/bin/chattr
                                                        chattr +ia /etc/systemd/system/system-service.service
                                                        1⤵
                                                          PID:1661
                                                        • /usr/bin/chattr
                                                          chattr +ia /etc/init.d/system-service
                                                          1⤵
                                                            PID:1659
                                                          • /usr/bin/chattr
                                                            chattr +ia /var/tmp/.cache/sysd
                                                            1⤵
                                                              PID:1657
                                                            • /bin/busybox
                                                              chattr +ia /etc/init.d/system-service
                                                              1⤵
                                                                PID:1660
                                                              • /bin/busybox
                                                                chattr +ia /etc/systemd/system/system-service.service
                                                                1⤵
                                                                  PID:1662
                                                                • /bin/busybox
                                                                  chattr +ia /var/tmp/.cache/sysd
                                                                  1⤵
                                                                    PID:1658

                                                                  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

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

                                                                        tmp.ZTp3jR
                                                                        • Path /var/spool/cron/crontabs/tmp.ZTp3jR
                                                                        • Size 231B
                                                                        • SHA256 ede3f72ea9d1ee03aaf37264253f763c46708420a2319a4f4f6f465380887070
                                                                        • MD5 SHA1 SHA512 TLSH
                                                                        Submit Download

                                                                        sysd
                                                                        • Path /var/tmp/.cache/sysd
                                                                        • Size 1.5MB
                                                                        • SHA256 60a3008395eadb95a93ce989d092a1ed67ba452eedf1d02760bf8ad84c39d1c9
                                                                        • MD5 SHA1 SHA512 SSDEEP TLSH
                                                                        Submit Download