Overview

overview

7

Static

static

1

flutter.x86.elf

ubuntu-18.04-amd64

7

Analysis

  • max time kernel
    149s
  • max time network
    143s
  • 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
    02/09/2026, 17:13

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General

  • Target
    flutter.x86.elf
  • Size 181KB
  • Sample260902-vrjkhayclf
  • SHA256 fcae3cb0b004cbf82e2e8c8a3a3eebceaba5284cece60b3dd08acf64afdf0987
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
7/10
defense_evasiondiscoveryexecutionpersistenceprivilege_escalation

Malware Config

Signatures

  • Modifies Watchdog functionality 1 TTPs 2 IoCs

    Malware like Mirai modifies the Watchdog to prevent it restarting an infected system.

    defense_evasion
  • 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 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 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
  • Changes its process name 3 IoCs
  • Reads system network configuration 1 TTPs 1 IoCs

    Uses contents of /proc filesystem to enumerate network settings.

    discovery
  • Reads runtime system information 64 IoCs

    Reads data from /proc virtual filesystem.

    discovery

Processes

  • /tmp/flutter.x86.elf
    /tmp/flutter.x86.elf
    1⤵
    • Modifies Watchdog functionality
    • Creates/modifies Cron job
    • Enumerates active TCP sockets
    • Modifies rc script
    • Modifies systemd
    • Write file to user bin folder
    • Changes its process name
    • Reads system network configuration
    • Reads runtime system information
    PID:1466
    • /usr/local/sbin/systemctl
      systemctl daemon-reload
      2⤵
        PID:1472
      • /usr/local/bin/systemctl
        systemctl daemon-reload
        2⤵
          PID:1472
        • /usr/sbin/systemctl
          systemctl daemon-reload
          2⤵
            PID:1472
          • /usr/bin/systemctl
            systemctl daemon-reload
            2⤵
              PID:1472
            • /sbin/systemctl
              systemctl daemon-reload
              2⤵
                PID:1472
              • /bin/systemctl
                systemctl daemon-reload
                2⤵
                • Reads runtime system information
                PID:1472
              • /usr/local/sbin/systemctl
                systemctl enable network-dispatch.service
                2⤵
                  PID:1501
                • /usr/local/bin/systemctl
                  systemctl enable network-dispatch.service
                  2⤵
                    PID:1501
                  • /usr/sbin/systemctl
                    systemctl enable network-dispatch.service
                    2⤵
                      PID:1501
                    • /usr/bin/systemctl
                      systemctl enable network-dispatch.service
                      2⤵
                        PID:1501
                      • /sbin/systemctl
                        systemctl enable network-dispatch.service
                        2⤵
                          PID:1501
                        • /bin/systemctl
                          systemctl enable network-dispatch.service
                          2⤵
                          • Reads runtime system information
                          PID:1501

                      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

                            2
                            T1547

                            XDG Autostart Entries

                            1
                            T1547.013

                            Boot or Logon Initialization Scripts

                            1
                            T1037

                            RC Scripts

                            1
                            T1037.004

                            Create or Modify System Process

                            1
                            T1543

                            Systemd Service

                            1
                            T1543.002

                            Scheduled Task/Job

                            1
                            T1053

                            Cron

                            1
                            T1053.003

                            Privilege Escalation

                            Boot or Logon Autostart Execution

                            2
                            T1547

                            XDG Autostart Entries

                            1
                            T1547.013

                            Boot or Logon Initialization Scripts

                            1
                            T1037

                            RC Scripts

                            1
                            T1037.004

                            Create or Modify System Process

                            1
                            T1543

                            Systemd Service

                            1
                            T1543.002

                            Scheduled Task/Job

                            1
                            T1053

                            Cron

                            1
                            T1053.003

                            Defense Evasion

                            Impair Defenses

                            1
                            T1562

                            Credential Access

                            Discovery

                            System Network Configuration Discovery

                            1
                            T1016

                            Internet Connection Discovery

                            1
                            T1016.001

                            System Network Connections Discovery

                            1
                            T1049

                            Lateral Movement

                            Collection

                            Command and Control

                            Exfiltration

                            Impact

                            Replay Monitor

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                            Downloads

                            flutter
                            • Path /etc/cron.d/flutter
                            • Size 36B
                            • SHA256 874da12a5d5efeea0ccd1ab988823e845b5506b8a45a04c5a4e2017fe9aa87a8
                            • MD5 SHA1 SHA512
                            Submit Download

                            network-dispatch.service
                            • Path /etc/systemd/system/network-dispatch.service
                            • Size 228B
                            • SHA256 f0a4522d9cacf37bc711ef07c7a07d2627ac3fb2a25e13e1695db14896da415e
                            • MD5 SHA1 SHA512 TLSH
                            Submit Download

                            network-dispatch
                            • Path /usr/local/bin/network-dispatch
                            • Size 181KB
                            • SHA256 fcae3cb0b004cbf82e2e8c8a3a3eebceaba5284cece60b3dd08acf64afdf0987
                            • MD5 SHA1 SHA512 SSDEEP TLSH
                            Submit Download