Overview

overview

7

Static

static

5

killbotx.x86_64

ubuntu-18.04-amd64

7

Analysis

  • user interaction
    yes
  • max time kernel
    149s
  • max time network
    149s
  • 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
    04/08/2026, 01:16

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General

  • Target
    killbotx.x86_64
  • Size 50KB
  • Sample260804-bms4laaf47
  • SHA256 f35054a531452aa858a6f4fa27651954e628277abd57ee67da1e5dd918dd8cbf
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
7/10
discoveryexecutionpersistenceprivilege_escalationupx

Malware Config

Signatures

  • Unexpected DNS network traffic destination 18 IoCs

    Network traffic to other servers than the configured DNS servers was detected on the DNS port.

  • Creates/modifies Cron job 1 TTPs 1 IoCs

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

    executionpersistenceprivilege_escalation
  • 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
  • Write file to user bin folder 1 IoCs
    persistence
  • UPX packed file 1 IoCs

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

    upx
  • Changes its process name 4 IoCs
  • Reads runtime system information 8 IoCs

    Reads data from /proc virtual filesystem.

    discovery

Processes

  • /tmp/killbotx.x86_64
    /tmp/killbotx.x86_64
    1⤵
    • Modifies rc script
    • Modifies systemd
    • Write file to user bin folder
    • Changes its process name
    • Reads runtime system information
    PID:1490
    • /bin/sh
      sh -c "systemctl enable ueotkl2ywrt.service >/dev/null 2>&1"
      2⤵
        PID:1499
        • /bin/systemctl
          systemctl enable ueotkl2ywrt.service
          3⤵
          • Reads runtime system information
          PID:1500
      • /bin/sh
        sh -c "crontab -l 2>/dev/null"
        2⤵
          PID:1521
          • /usr/bin/crontab
            crontab -l
            3⤵
              PID:1522
          • /bin/sh
            sh -c "(crontab -l 2>/dev/null; echo '@reboot /usr/local/bin/ly4k9gcny5ho8wf &') | crontab -"
            2⤵
              PID:1523
              • /usr/bin/crontab
                crontab -
                3⤵
                • Creates/modifies Cron job
                PID:1525
              • /usr/bin/crontab
                crontab -l
                3⤵
                  PID:1526

            Network

                  MITRE ATT&CK Enterprise v16

                  Replay Monitor

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                  Downloads

                  ueotkl2ywrt.service
                  • Path /etc/systemd/system/ueotkl2ywrt.service
                  • Size 186B
                  • SHA256 aece3ccd19bc77e0670cb6959f9c186148e2bf36e673b1016e4e96ce7f481c12
                  • MD5 SHA1 SHA512 TLSH
                  Submit Download

                  ly4k9gcny5ho8wf
                  • Path /usr/local/bin/ly4k9gcny5ho8wf
                  • Size 50KB
                  • SHA256 f35054a531452aa858a6f4fa27651954e628277abd57ee67da1e5dd918dd8cbf
                  • MD5 SHA1 SHA512 SSDEEP TLSH
                  Submit Download

                  tmp.L51IoJ
                  • Path /var/spool/cron/crontabs/tmp.L51IoJ
                  • Size 216B
                  • SHA256 d10a34ce5a9fd0752d44d53e00813add7fcb9a2f41067648a3ffe580bff95856
                  • MD5 SHA1 SHA512 TLSH
                  Submit Download