Overview

overview

10

Static

static

5

ec542e5844...53353c

ubuntu-18.04-amd64

10

Analysis

  • max time kernel
    149s
  • max time network
    151s
  • 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
    30/09/2026, 16:07

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General

  • Target
    ec542e5844af47c855a13f8a69e8fdb21dfaa187aeba3447246fac967253353c
  • Size 53KB
  • Sample260930-tknefazbka
  • SHA256 ec542e5844af47c855a13f8a69e8fdb21dfaa187aeba3447246fac967253353c
  • 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/ec542e5844af47c855a13f8a69e8fdb21dfaa187aeba3447246fac967253353c
    /tmp/ec542e5844af47c855a13f8a69e8fdb21dfaa187aeba3447246fac967253353c
    1⤵
    • Deletes itself
    • Modifies init.d
    • Modifies systemd
    • Write file to user bin folder
    • Changes its process name
    • Reads runtime system information
    PID:1494
    • /bin/sh
      sh -c "systemctl enable KvOfkyWY7QX.service >/dev/null 2>&1 || true"
      2⤵
        PID:1497
        • /bin/systemctl
          systemctl enable KvOfkyWY7QX.service
          3⤵
          • Reads runtime system information
          PID:1498
      • /bin/sh
        sh -c "crontab -l 2>/dev/null"
        2⤵
          PID:1526
          • /usr/bin/crontab
            crontab -l
            3⤵
              PID:1527
          • /bin/sh
            sh -c "(crontab -l 2>/dev/null; echo '@reboot /usr/local/bin/KvOfkyWY7QXtPGd &') | crontab -"
            2⤵
              PID:1528
              • /usr/bin/crontab
                crontab -
                3⤵
                • Creates/modifies Cron job
                PID:1530
              • /usr/bin/crontab
                crontab -l
                3⤵
                  PID:1531

            Network

                  MITRE ATT&CK Enterprise v16

                  Replay Monitor

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                  Downloads

                  KvOfkyWY7QX
                  • Path /etc/init.d/KvOfkyWY7QX
                  • Size 181B
                  • SHA256 f7bb159c38e9c39ba0a7c0882f5232b82b07d3f17fd4259f136684e9ea74217d
                  • MD5 SHA1 SHA512 TLSH
                  Submit Download

                  KvOfkyWY7QX.service
                  • Path /etc/systemd/system/KvOfkyWY7QX.service
                  • Size 186B
                  • SHA256 9cdc8ada8f8130d4a98bc24d52d215bbfea31dbed44822a00bc123057a546ba0
                  • MD5 SHA1 SHA512 TLSH
                  Submit Download

                  KvOfkyWY7QXtPGd
                  • Path /usr/local/bin/KvOfkyWY7QXtPGd
                  • Size 53KB
                  • SHA256 ec542e5844af47c855a13f8a69e8fdb21dfaa187aeba3447246fac967253353c
                  • MD5 SHA1 SHA512 SSDEEP TLSH
                  Submit Download

                  tmp.dFYnnI
                  • Path /var/spool/cron/crontabs/tmp.dFYnnI
                  • Size 216B
                  • SHA256 4ad5ccce849002419067e93954b79e6ab3b904124434308256c496e363f6ebc3
                  • MD5 SHA1 SHA512 TLSH
                  Submit Download