Overview

overview

7

Static

static

5

flutter.arm7.elf

debian-12-armhf

7

Analysis

  • max time kernel
    148s
  • max time network
    147s
  • platform
    debian-12_armhf
  • resource
    debian12-armhf-20260513-en
  • resource tags

    arch:armhfimage:debian12-armhf-20260513-enkernel:6.1.0-17-armmp-lpaelocale:en-usos:debian-12-armhfsystem
  • submitted
    19/08/2026, 20:30

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General

  • Target
    flutter.arm7.elf
  • Size 97KB
  • Sample260819-zagf2ahn8v
  • SHA256 b6485bb24becb01de3319bc543c026f2b22695146dca3447143384ed92f6933a
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
7/10
defense_evasiondiscoveryexecutionpersistenceprivilege_escalationupx

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
  • UPX packed file 1 IoCs

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

    upx
  • 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.arm7.elf
    /tmp/flutter.arm7.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:788
    • /usr/local/sbin/systemctl
      systemctl daemon-reload
      2⤵
        PID:801
      • /usr/local/bin/systemctl
        systemctl daemon-reload
        2⤵
          PID:801
        • /usr/sbin/systemctl
          systemctl daemon-reload
          2⤵
            PID:801
          • /usr/bin/systemctl
            systemctl daemon-reload
            2⤵
            • Reads runtime system information
            PID:801
          • /usr/local/sbin/systemctl
            systemctl enable network-dispatch.service
            2⤵
              PID:855
            • /usr/local/bin/systemctl
              systemctl enable network-dispatch.service
              2⤵
                PID:855
              • /usr/sbin/systemctl
                systemctl enable network-dispatch.service
                2⤵
                  PID:855
                • /usr/bin/systemctl
                  systemctl enable network-dispatch.service
                  2⤵
                    PID:855

                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 37B
                      • SHA256 b65539cdcaaf30a09a9c013966042db0035604e3fdd7e17876c9949757de0287
                      • 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 97KB
                      • SHA256 b6485bb24becb01de3319bc543c026f2b22695146dca3447143384ed92f6933a
                      • MD5 SHA1 SHA512 SSDEEP TLSH
                      Submit Download