Overview

overview

7

Static

static

1

x86_64.elf

ubuntu-18.04-amd64

7

Analysis

  • max time kernel
    149s
  • max time network
    129s
  • 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
    09/10/2026, 23:16

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General

  • Target
    x86_64.elf
  • Size 126KB
  • Sample261009-289atafy21
  • SHA256 ef549f315d3af072ff7db4c7f65cdf1e7a9b30bb3a0143a6f9ef7b2d2dc2ffec
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
7/10
credential_accessdefense_evasiondiscoveryexecutionpersistenceprivilege_escalation

Malware Config

Signatures

  • Deletes itself 1 IoCs
  • 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

Processes

  • /tmp/x86_64.elf
    /tmp/x86_64.elf
    1⤵
    • Deletes itself
    • 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:1493
    • /bin/sh
      sh -c "systemctl daemon-reload 2>/dev/null"
      2⤵
        PID:1509
        • /bin/systemctl
          systemctl daemon-reload
          3⤵
          • Reads runtime system information
          PID:1510
      • /bin/sh
        sh -c "systemctl enable system-service 2>/dev/null"
        2⤵
          PID:1531
          • /bin/systemctl
            systemctl enable system-service
            3⤵
            • Reads runtime system information
            PID:1532
        • /bin/sh
          sh -c "update-rc.d system-service defaults 2>/dev/null"
          2⤵
            PID:1553
            • /usr/sbin/update-rc.d
              update-rc.d system-service defaults
              3⤵
                PID:1554
                • /usr/local/sbin/systemctl
                  systemctl daemon-reload
                  4⤵
                    PID:1555
                  • /usr/local/bin/systemctl
                    systemctl daemon-reload
                    4⤵
                      PID:1555
                    • /usr/sbin/systemctl
                      systemctl daemon-reload
                      4⤵
                        PID:1555
                      • /usr/bin/systemctl
                        systemctl daemon-reload
                        4⤵
                          PID:1555
                        • /sbin/systemctl
                          systemctl daemon-reload
                          4⤵
                            PID:1555
                          • /bin/systemctl
                            systemctl daemon-reload
                            4⤵
                              PID:1555
                        • /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:1576
                          • /bin/sh
                            sh -c "crontab -l 2>/dev/null"
                            2⤵
                              PID:1577
                              • /usr/bin/crontab
                                crontab -l
                                3⤵
                                  PID:1578
                              • /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:1579
                                  • /usr/bin/crontab
                                    crontab -
                                    3⤵
                                    • Creates/modifies Cron job
                                    PID:1581
                                  • /usr/bin/crontab
                                    crontab -l
                                    3⤵
                                      PID:1582
                                  • /usr/bin/chattr
                                    chattr +ia /var/tmp/.cache/sysd
                                    2⤵
                                      PID:1586
                                    • /bin/busybox
                                      chattr +ia /var/tmp/.cache/sysd
                                      2⤵
                                        PID:1587
                                      • /usr/bin/chattr
                                        chattr +ia /etc/init.d/system-service
                                        2⤵
                                          PID:1588
                                        • /bin/busybox
                                          chattr +ia /etc/init.d/system-service
                                          2⤵
                                            PID:1589
                                          • /usr/bin/chattr
                                            chattr +ia /etc/systemd/system/system-service.service
                                            2⤵
                                              PID:1590
                                            • /bin/busybox
                                              chattr +ia /etc/systemd/system/system-service.service
                                              2⤵
                                                PID:1591
                                              • /usr/bin/chattr
                                                chattr +ia /var/tmp/.cache/sysd
                                                2⤵
                                                  PID:1600
                                                • /bin/busybox
                                                  chattr +ia /var/tmp/.cache/sysd
                                                  2⤵
                                                    PID:1601
                                                  • /usr/bin/chattr
                                                    chattr +ia /etc/init.d/system-service
                                                    2⤵
                                                      PID:1602
                                                    • /bin/busybox
                                                      chattr +ia /etc/init.d/system-service
                                                      2⤵
                                                        PID:1603
                                                      • /usr/bin/chattr
                                                        chattr +ia /etc/systemd/system/system-service.service
                                                        2⤵
                                                          PID:1604
                                                        • /bin/busybox
                                                          chattr +ia /etc/systemd/system/system-service.service
                                                          2⤵
                                                            PID:1605
                                                          • /usr/bin/chattr
                                                            chattr +ia /var/tmp/.cache/sysd
                                                            2⤵
                                                              PID:1609
                                                            • /bin/busybox
                                                              chattr +ia /var/tmp/.cache/sysd
                                                              2⤵
                                                                PID:1610
                                                              • /usr/bin/chattr
                                                                chattr +ia /etc/init.d/system-service
                                                                2⤵
                                                                  PID:1611
                                                                • /bin/busybox
                                                                  chattr +ia /etc/init.d/system-service
                                                                  2⤵
                                                                    PID:1612
                                                                  • /usr/bin/chattr
                                                                    chattr +ia /etc/systemd/system/system-service.service
                                                                    2⤵
                                                                      PID:1613
                                                                    • /bin/busybox
                                                                      chattr +ia /etc/systemd/system/system-service.service
                                                                      2⤵
                                                                        PID:1614

                                                                    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

                                                                          1
                                                                          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 132B
                                                                          • SHA256 cb4e70c1869ed130f8b46ae08f05d6e19d9219412396589bb082e1e450d3ddb8
                                                                          • MD5 SHA1 SHA512 TLSH
                                                                          Submit Download

                                                                          tmp.QUUgpH
                                                                          • Path /var/spool/cron/crontabs/tmp.QUUgpH
                                                                          • Size 231B
                                                                          • SHA256 adb3d97c0a875a45946750f0a0e2ba777c63e82db2b91646261c2820a989a335
                                                                          • MD5 SHA1 SHA512 TLSH
                                                                          Submit Download

                                                                          sysd
                                                                          • Path /var/tmp/.cache/sysd
                                                                          • Size 126KB
                                                                          • SHA256 ef549f315d3af072ff7db4c7f65cdf1e7a9b30bb3a0143a6f9ef7b2d2dc2ffec
                                                                          • MD5 SHA1 SHA512 SSDEEP TLSH
                                                                          Submit Download