Overview

overview

10

Static

static

5

iran.x86_64.elf

ubuntu-18.04-amd64

10

Analysis

  • max time kernel
    120s
  • max time network
    134s
  • 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
    12/10/2026, 17:23

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General

  • Target
    iran.x86_64.elf
  • Size 53KB
  • Sample261012-vx83cayth1
  • SHA256 3e12974c293093f0e91f65d121c9b6fd0991fb3a8890f5aca375f1dae1653569
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
botnetdiscoveryexecutionflylegitbotpersistenceprivilege_escalationupx

Malware Config

Signatures

  • Family: FlyLegitBot

    FlyLegitBot is a Mirai-based botnet.

    botnetflylegitbot
  • Detects FlyLegitBot 1 IoCs
  • Deletes itself 1 IoCs
  • Creates/modifies Cron job 1 TTPs 1 IoCs

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

    executionpersistenceprivilege_escalation
  • 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 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 1 IoCs
  • Reads runtime system information 64 IoCs

    Reads data from /proc virtual filesystem.

    discovery

Processes

  • /tmp/iran.x86_64.elf
    /tmp/iran.x86_64.elf
    1⤵
    • Deletes itself
    • Modifies init.d
    • Modifies systemd
    • Write file to user bin folder
    • Changes its process name
    • Reads runtime system information
    PID:1503
    • /bin/sh
      sh -c "systemctl enable Z9kilRhcgWk.service >/dev/null 2>&1 || true"
      2⤵
        PID:1506
        • /bin/systemctl
          systemctl enable Z9kilRhcgWk.service
          3⤵
          • Reads runtime system information
          PID:1507
      • /bin/sh
        sh -c "crontab -l 2>/dev/null"
        2⤵
          PID:1533
          • /usr/bin/crontab
            crontab -l
            3⤵
              PID:1534
          • /bin/sh
            sh -c "(crontab -l 2>/dev/null; echo '@reboot /usr/local/bin/Z9kilRhcgWkCKQO &') | crontab -"
            2⤵
              PID:1535
              • /usr/bin/crontab
                crontab -
                3⤵
                • Creates/modifies Cron job
                PID:1539
              • /usr/bin/crontab
                crontab -l
                3⤵
                  PID:1541

            Network

                  MITRE ATT&CK Enterprise v16

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                  Downloads

                  Z9kilRhcgWk
                  • Path /etc/init.d/Z9kilRhcgWk
                  • Size 181B
                  • SHA256 fff7da6fafe341a429af75489cd04de3b9485b09b007b5811b151257e1ba325b
                  • MD5 SHA1 SHA512 TLSH
                  Submit Download

                  Z9kilRhcgWk.service
                  • Path /etc/systemd/system/Z9kilRhcgWk.service
                  • Size 186B
                  • SHA256 ec75c42885879ba0f8af1de5bfaabf055da1da6dcf31d14a22d1533e518055f6
                  • MD5 SHA1 SHA512 TLSH
                  Submit Download

                  Z9kilRhcgWkCKQO
                  • Path /usr/local/bin/Z9kilRhcgWkCKQO
                  • Size 53KB
                  • SHA256 3e12974c293093f0e91f65d121c9b6fd0991fb3a8890f5aca375f1dae1653569
                  • MD5 SHA1 SHA512 SSDEEP TLSH
                  Submit Download

                  tmp.K2j1Fm
                  • Path /var/spool/cron/crontabs/tmp.K2j1Fm
                  • Size 216B
                  • SHA256 d06879eb843bd76b8a1bb66a7977eb7eaa4bf9923282ff519cbac604ca746832
                  • MD5 SHA1 SHA512 TLSH
                  Submit Download