Overview

overview

7

Static

static

1

mipsel.elf

debian-12-mipsel

7

Analysis

  • max time kernel
    150s
  • max time network
    154s
  • platform
    debian-12_mipsel
  • resource
    debian12-mipsel-20250619-en
  • resource tags

    arch:mipselimage:debian12-mipsel-20250619-enkernel:6.1.0-17-4kc-maltalocale:en-usos:debian-12-mipselsystem
  • submitted
    29/06/2025, 04:25

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General

  • Target
    mipsel.elf
  • Size 497KB
  • Sample250629-e2efjafk6y
  • SHA256 02a615e6daf0d87264509f6d7e0f1ccc809792abfe2c5cc02cd4140f24dac4d0
  • MD5 SHA1 SHA512 SSDEEP
Score
7/10
antivmdefense_evasiondiscoveryexecutionpersistenceprivilege_escalation

Malware Config

Signatures

  • Renames itself 1 IoCs
  • Checks hardware identifiers (DMI) 1 TTPs 2 IoCs

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

    antivm
  • 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 running processes

    Discovers information about currently running processes on the system

  • Reads MAC address of network interface 2 TTPs 1 IoCs

    Fetches the MAC address of active network interfaces. May be used to detect known values for hypervisors.

    defense_evasiondiscovery
  • Reads hardware information 1 TTPs 4 IoCs

    Accesses system info like serial numbers, manufacturer names etc.

    discovery
  • Checks CPU configuration 1 TTPs 1 IoCs

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

    antivm
  • Reads CPU attributes 1 TTPs 1 IoCs
    discovery
  • 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 2 IoCs

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

    discovery
  • Writes file to tmp directory 1 IoCs

    Malware often drops required files in the /tmp directory.

Processes

  • /tmp/mipsel.elf
    /tmp/mipsel.elf
    1⤵
    • Renames itself
    • System Network Configuration Discovery
    PID:794
    • /bin/sh
      sh -c "crontab -l"
      2⤵
        PID:796
        • /usr/bin/crontab
          crontab -l
          3⤵
            PID:797
        • /bin/sh
          sh -c "(crontab -l ; echo \"@reboot /root/.sys/configuration\")| crontab -"
          2⤵
            PID:801
            • /usr/bin/crontab
              crontab -
              3⤵
              • Creates/modifies Cron job
              PID:806
            • /usr/bin/crontab
              crontab -l
              3⤵
                PID:807
          • /root/.sys/configuration
            /tmp/mipsel.elf
            1⤵
            • Checks hardware identifiers (DMI)
            • Reads MAC address of network interface
            • Reads hardware information
            • Checks CPU configuration
            • Reads CPU attributes
            • Enumerates kernel/hardware configuration
            • Reads runtime system information
            • System Network Configuration Discovery
            • Writes file to tmp directory
            PID:794

          Network

                MITRE ATT&CK Enterprise v16

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                Downloads

                tmp.MCuRXC
                • Path /var/spool/cron/crontabs/tmp.MCuRXC
                • Size 208B
                • SHA256 5ceae3d7e4464484172f50486c6edd65e54ada7c6b9861c1a128d5f39daa52dc
                • MD5 SHA1 SHA512
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