Overview

overview

10

Static

static

10

arm5.elf

debian-9-armhf

7

Analysis

  • max time kernel
    132s
  • max time network
    149s
  • platform
    debian-9_armhf
  • resource
    debian9-armhf-20240729-en
  • resource tags

    arch:armhfimage:debian9-armhf-20240729-enkernel:4.9.0-13-armmp-lpaelocale:en-usos:debian-9-armhfsystem
  • submitted
    01/01/2025, 17:41

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General

  • Target

    arm5.elf

  • Size

    81KB

  • MD5

    8114773b3827da1450fa61dda0679c8b

  • SHA1

    db663b5e80ce27edbb3d06b81bca78b45cc5b1dc

  • SHA256

    b6720048ed8dc114296bb3007adca57f649247dddadde777b00019aaadd1d360

  • SHA512

    c7c86749ad2c4395ba5d9156fe271d6522406245fba31f3febc57b451cdc70ba070b7652bf753c534c0d51b8c1460bff9cca4ea93023521a3f1957280bd71aa8

  • SSDEEP

    1536:ih+1IWRBh2N3+SDY/uFMPpa/C4fNXAVBhhl8Xx4UngTBgl:ih+ba0dBa/CaVAVbhlCOTSl

Score
7/10
defense_evasiondiscoveryevasionpersistenceprivilege_escalation

Malware Config

Signatures

  • Deletes Audit logs 1 TTPs 1 IoCs

    Deletes logs related to the Linux Audit framework.

    evasion
  • Deletes itself 1 IoCs
  • Deletes system logs 1 TTPs 2 IoCs

    Deletes log file which contains global system messages. Adversaries may delete system logs to minimize their footprint.

    evasion
  • Modifies Watchdog functionality 1 TTPs 2 IoCs

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

    defense_evasion
  • Deletes log files 1 TTPs 2 IoCs

    Deletes log files on the 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
  • Changes its process name 1 IoCs
  • Enumerates kernel/hardware configuration 1 TTPs 2 IoCs

    Reads contents of /sys virtual filesystem to enumerate system information.

    discovery
  • Reads runtime system information 64 IoCs

    Reads data from /proc virtual filesystem.

    discovery

Processes

  • /tmp/arm5.elf
    /tmp/arm5.elf
    1⤵
    • Deletes Audit logs
    • Deletes itself
    • Deletes system logs
    • Modifies Watchdog functionality
    • Deletes log files
    • Modifies systemd
    • Changes its process name
    • Reads runtime system information
    PID:656
    • /bin/sh
      sh -c "systemctl daemon-reload"
      2⤵
        PID:661
        • /bin/systemctl
          systemctl daemon-reload
          3⤵
          • Enumerates kernel/hardware configuration
          • Reads runtime system information
          PID:663
      • /bin/sh
        sh -c "systemctl enable startup_command.service"
        2⤵
          PID:671
          • /bin/systemctl
            systemctl enable startup_command.service
            3⤵
            • Enumerates kernel/hardware configuration
            • Reads runtime system information
            PID:674

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • /etc/systemd/system/startup_command.service
        Filesize

        361B

        MD5

        4d2c868f454b6c55731485cf0f886dc0

        SHA1

        032b125de0a28dcee8d8d25fbeeb56db7f403f04

        SHA256

        8c4ae1b82477698f3a8c273b439cb9079794afb8fc33cd4def854936ba37ea2c

        SHA512

        060b2413a0cb2dec0db059c190467b5cb0d76209effea4ae3de2701fa71429b811a6f7e11e813b26806cf72578d1f32b608a02a4ce670ec58b5b65433e3cf11d

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