Overview

overview

7

Static

static

1

mipsel.elf

debian-9-mipsel

7

Analysis

  • max time kernel
    122s
  • max time network
    147s
  • 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
    25/06/2025, 22:40

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General

  • Target
    mipsel.elf
  • Size 497KB
  • Sample250625-2lnetswpz4
  • SHA256 e1dc751dce1bec26f6434720733b597840fff6ac403751bb32f946edd5f79dad
  • 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:709
    • /bin/sh
      sh -c "crontab -l"
      2⤵
        PID:710
        • /usr/bin/crontab
          crontab -l
          3⤵
          • Reads runtime system information
          PID:711
      • /bin/sh
        sh -c "(crontab -l ; echo \"@reboot /root/.sys/configuration\")| crontab -"
        2⤵
          PID:720
          • /usr/bin/crontab
            crontab -
            3⤵
            • Creates/modifies Cron job
            • Reads runtime system information
            PID:723
          • /usr/bin/crontab
            crontab -l
            3⤵
            • Reads runtime system information
            PID:724
      • /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:709

      Network

            MITRE ATT&CK Enterprise v16

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            Downloads

            tmp.YduNah
            • Path /var/spool/cron/crontabs/tmp.YduNah
            • Size 208B
            • SHA256 e20a0b34130b2f425f24f962833143a5847dbbee39602618b1f7e0c5c615885c
            • MD5 SHA1 SHA512
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