Overview

overview

6

Static

static

1

BHRm.elf

debian-12-armhf

6

Analysis

  • max time kernel
    150s
  • max time network
    142s
  • 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
    27/07/2026, 19:08

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General

  • Target
    BHRm.elf
  • Size 78KB
  • Sample260727-xth3vszaqb
  • SHA256 60a58ace3a7f7f4e64651307b54980c888b39afccbc36c08044e80919ca918f1
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
6/10
antivmdiscoveryexecutionpersistenceprivilege_escalation

Malware Config

Signatures

  • Creates/modifies Cron job 1 TTPs 2 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 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
  • Checks CPU configuration 1 TTPs 1 IoCs

    Checks CPU information which indicate if the system is a virtual machine.

    antivm
  • Reads runtime system information 64 IoCs

    Reads data from /proc virtual filesystem.

    discovery

Processes

  • /tmp/BHRm.elf
    /tmp/BHRm.elf
    1⤵
    • Creates/modifies Cron job
    • Modifies rc script
    • Modifies systemd
    • Checks CPU configuration
    • Reads runtime system information
    PID:802
    • /usr/local/sbin/systemctl
      systemctl enable crond.service
      2⤵
        PID:838
      • /usr/local/sbin/systemctl
        systemctl daemon-reload
        2⤵
          PID:837
        • /usr/local/bin/systemctl
          systemctl daemon-reload
          2⤵
            PID:837
          • /usr/local/bin/systemctl
            systemctl enable crond.service
            2⤵
              PID:838
            • /usr/sbin/systemctl
              systemctl daemon-reload
              2⤵
                PID:837
              • /usr/sbin/systemctl
                systemctl enable crond.service
                2⤵
                  PID:838
              • /usr/bin/systemctl
                systemctl enable crond.service
                1⤵
                  PID:838
                • /usr/bin/systemctl
                  systemctl daemon-reload
                  1⤵
                    PID:837

                  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

                        Virtualization/Sandbox Evasion

                        1
                        T1497

                        System Checks

                        1
                        T1497.001

                        Credential Access

                        Discovery

                        Virtualization/Sandbox Evasion

                        1
                        T1497

                        System Checks

                        1
                        T1497.001

                        Lateral Movement

                        Collection

                        Command and Control

                        Exfiltration

                        Impact

                        Replay Monitor

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                        Downloads

                        crond
                        • Path /etc/cron.d/crond
                        • Size 30B
                        • SHA256 2453ec186e1151a295c8bd024e381fe7e1eb3974bbc870e86311812de345a6d5
                        • MD5 SHA1 SHA512
                        Submit Download

                        rc.local
                        • Path /etc/rc.local
                        • Size 10B
                        • SHA256 a8076d3d28d21e02012b20eaf7dbf75409a6277134439025f282e368e3305abf
                        • MD5 SHA1 SHA512
                        Submit Download

                        rc.local
                        • Path /etc/rc.local
                        • Size 34B
                        • SHA256 29f8d02356a542b03534e06b45889ddf04330766d40947323dc665f3d58ca772
                        • MD5 SHA1 SHA512
                        Submit Download

                        crond.service
                        • Path /etc/systemd/system/crond.service
                        • Size 193B
                        • SHA256 c85dc81ca9aeb880d676a382d489e892278efe56244869cde9c9a0b55cb012e6
                        • MD5 SHA1 SHA512 TLSH
                        Submit Download