Overview

overview

10

Static

static

5

arm7.elf

debian-12-armhf

10

Analysis

  • max time kernel
    145s
  • max time network
    151s
  • platform
    debian-12_armhf
  • resource
    debian12-armhf-20250619-en
  • resource tags

    arch:armhfimage:debian12-armhf-20250619-enkernel:6.1.0-17-armmp-lpaelocale:en-usos:debian-12-armhfsystem
  • submitted
    02/12/2025, 04:15

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General

  • Target
    arm7.elf
  • Size 49KB
  • Sample251202-evfd9aar41
  • SHA256 98386a87bf3cbbbb23e8b8c24d1ad217540e1d947dffa7acbf0e33fecac78324
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
botnetdefense_evasiondiscoveryexecutionmiraipersistenceprivilege_escalationupx

Malware Config

Extracted

Family

  • mirai

C2

  • teamc2.duckdns.org

Signatures

  • Mirai

    Mirai is a prevalent Linux malware infecting exposed network devices.

    botnetmirai
  • Mirai family
    mirai
  • Deletes Audit logs 1 TTPs 1 IoCs

    Deletes logs related to the Linux Audit framework.

    defense_evasion
  • Deletes journal logs 1 TTPs 1 IoCs

    Deletes systemd journal logs. Likely to evade detection.

    defense_evasion
  • Modifies Watchdog functionality 1 TTPs 2 IoCs

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

    defense_evasion
  • Enumerates running processes

    Discovers information about currently running processes on the system

  • 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
  • Writes file to system bin folder 2 IoCs
  • UPX packed file 1 IoCs

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

    upx
  • Command and Scripting Interpreter: Unix Shell 1 TTPs 2 IoCs

    Execute scripts via Unix Shell.

    execution
  • Reads runtime system information 64 IoCs

    Reads data from /proc virtual filesystem.

    discovery

Processes

  • /tmp/arm7.elf
    /tmp/arm7.elf
    1⤵
    • Deletes Audit logs
    • Deletes journal logs
    • Modifies Watchdog functionality
    • Modifies systemd
    • Write file to user bin folder
    • Writes file to system bin folder
    • Reads runtime system information
    PID:782
    • /bin/sh
      /bin/sh -c "systemctl enable infinitech >/dev/null 2>&1"
      2⤵
      • Command and Scripting Interpreter: Unix Shell
      PID:787
    • /bin/sh
      /bin/sh -c "systemctl start infinitech >/dev/null 2>&1"
      2⤵
      • Command and Scripting Interpreter: Unix Shell
      PID:789

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        infinitech.service
        • Path /etc/systemd/system/infinitech.service
        • Size 134B
        • SHA256 d33b3ffb798158ca1aa39cbdb3c9bffd7e73eb5592ae8b83c90600b00b756f39
        • MD5 SHA1 SHA512
        Submit Download

        infinitd
        • Path /usr/local/bin/infinitd
        • Size 49KB
        • SHA256 98386a87bf3cbbbb23e8b8c24d1ad217540e1d947dffa7acbf0e33fecac78324
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download