Overview

overview

7

Static

static

1

bot_arm.elf

debian-12-armhf

7

Analysis

  • max time kernel
    147s
  • max time network
    150s
  • platform
    debian-12_armhf
  • resource
    debian12-armhf-20260127-en
  • resource tags

    arch:armhfimage:debian12-armhf-20260127-enkernel:6.1.0-17-armmp-lpaelocale:en-usos:debian-12-armhfsystem
  • submitted
    04/11/2026, 03:47

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General

  • Target
    bot_arm.elf
  • Size 165KB
  • Sample261104-eccweahv8j
  • SHA256 e79ea6eb542c2a89eb1d69aa65f5578f59adbc074ed5d1ca540f198e89e06a6e
  • 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/bot_arm.elf
    /tmp/bot_arm.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:796
      • /usr/local/bin/systemctl
        systemctl daemon-reload
        2⤵
          PID:796
        • /usr/sbin/systemctl
          systemctl daemon-reload
          2⤵
            PID:796
          • /usr/bin/systemctl
            systemctl daemon-reload
            2⤵
            • Reads runtime system information
            PID:796
          • /usr/local/sbin/systemctl
            systemctl enable network-dispatch.service
            2⤵
              PID:829
            • /usr/local/bin/systemctl
              systemctl enable network-dispatch.service
              2⤵
                PID:829
              • /usr/sbin/systemctl
                systemctl enable network-dispatch.service
                2⤵
                  PID:829
                • /usr/bin/systemctl
                  systemctl enable network-dispatch.service
                  2⤵
                  • Reads runtime system information
                  PID:829

              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 32B
                    • SHA256 095f2c183ff170e3c61214a6d1e3276d6a2c1409ec5375a5862bf2452863c347
                    • 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 165KB
                    • SHA256 e79ea6eb542c2a89eb1d69aa65f5578f59adbc074ed5d1ca540f198e89e06a6e
                    • MD5 SHA1 SHA512 SSDEEP TLSH
                    Submit Download