Overview

overview

7

Static

static

1

mipsel.elf

debian-9-mipsel

7

Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    debian-9_mipsel
  • resource
    debian9-mipsel-20250619-en
  • resource tags

    arch:mipselimage:debian9-mipsel-20250619-enkernel:4.9.0-13-4kc-maltalocale:en-usos:debian-9-mipselsystem
  • submitted
    15/07/2025, 00:07

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General

  • Target
    mipsel.elf
  • Size 497KB
  • Sample250715-aeka2saq21
  • SHA256 83583cccf0aeceade39034ab9401de86fb8d1eca3ef6234108c3de6764249cce
  • 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:707
    • /bin/sh
      sh -c "crontab -l"
      2⤵
        PID:708
        • /usr/bin/crontab
          crontab -l
          3⤵
            PID:710
        • /bin/sh
          sh -c "(crontab -l ; echo \"@reboot /root/.sys/configuration\")| crontab -"
          2⤵
            PID:713
            • /usr/bin/crontab
              crontab -l
              3⤵
                PID:717
              • /usr/bin/crontab
                crontab -
                3⤵
                • Creates/modifies Cron job
                • Reads runtime system information
                PID:716
          • /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:707

          Network

                MITRE ATT&CK Enterprise v16

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                Downloads

                tmp.bz8Czs
                • Path /var/spool/cron/crontabs/tmp.bz8Czs
                • Size 208B
                • SHA256 526d6af3b3d3a3127d64604a222a687d172d06e36b5dee2f2a7c3f155db3c231
                • MD5 SHA1 SHA512
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