Overview

overview

10

Static

static

10

sever1078.x86.elf

ubuntu-18.04-amd64

10

Analysis

  • max time kernel
    108s
  • max time network
    153s
  • platform
    ubuntu-18.04_amd64
  • resource
    ubuntu1804-amd64-20260513-en
  • resource tags

    arch:amd64arch:i386image:ubuntu1804-amd64-20260513-enkernel:4.15.0-213-genericlocale:en-usos:ubuntu-18.04-amd64system
  • submitted
    20/09/2026, 04:35

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General

  • Target
    sever1078.x86.elf
  • Size 455KB
  • Sample260920-e7skcabp7v
  • SHA256 80828752354b3a770b7c63f46006334fc705c718d40cf3e1df1dc5a4f0fdf043
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
botnetdefense_evasiondiscoveryexecutionmiraipersistenceprivilege_escalation

Malware Config

Extracted

Family

  • mirai

C2

  • bigbigvol.qd.je

Signatures

  • Family: Mirai

    Mirai is a prevalent Linux malware infecting exposed network devices.

    botnetmirai
  • Contacts a large (23370) amount of remote hosts 1 TTPs

    This may indicate a network scan to discover remotely running services.

    discovery
  • Creates a large amount of network flows 1 TTPs

    This may indicate a network scan to discover remotely running services.

    discovery
  • Executes dropped EXE 1 IoCs
  • Modifies Watchdog functionality 1 TTPs 2 IoCs

    Malware like Mirai modifies the Watchdog to prevent it restarting an infected system.

    defense_evasion
  • 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 active TCP sockets 1 TTPs 1 IoCs

    Gets active TCP sockets from /proc virtual filesystem.

    discovery
  • Enumerates running processes

    Discovers information about currently running processes on the system

  • Modifies systemd 2 TTPs 1 IoCs

    Adds/ modifies systemd service files. Likely to achieve persistence.

    persistenceprivilege_escalation
  • Writes file to system bin folder 2 IoCs
  • Changes its process name 7 IoCs
  • Reads system network configuration 1 TTPs 1 IoCs

    Uses contents of /proc filesystem to enumerate network settings.

    discovery
  • Reads runtime system information 64 IoCs

    Reads data from /proc virtual filesystem.

    discovery

Processes

  • /tmp/sever1078.x86.elf
    /tmp/sever1078.x86.elf
    1⤵
    • Executes dropped EXE
    • Modifies systemd
    PID:1485
    • /bin/sh
      sh -c "(crontab -l 2>/dev/null | grep -v '/var/tmp/.sysd' | crontab - 2>/dev/null) >/dev/null 2>&1"
      2⤵
        PID:1487
        • /bin/grep
          grep -v /var/tmp/.sysd
          3⤵
            PID:1490
          • /usr/bin/crontab
            crontab -
            3⤵
            • Creates/modifies Cron job
            PID:1491
          • /usr/bin/crontab
            crontab -l
            3⤵
              PID:1489
          • /bin/sh
            sh -c "systemctl daemon-reload 2>/dev/null; systemctl enable systemd-network-update.service 2>/dev/null; systemctl start systemd-network-update.service 2>/dev/null"
            2⤵
              PID:1493
              • /bin/systemctl
                systemctl daemon-reload
                3⤵
                • Reads runtime system information
                PID:1494
              • /bin/systemctl
                systemctl enable systemd-network-update.service
                3⤵
                • Reads runtime system information
                PID:1518
              • /bin/systemctl
                systemctl start systemd-network-update.service
                3⤵
                • Reads runtime system information
                PID:1539
          • /var/tmp/.sysd
            /var/tmp/.sysd
            1⤵
            • Modifies Watchdog functionality
            • Enumerates active TCP sockets
            • Writes file to system bin folder
            • Changes its process name
            • Reads system network configuration
            • Reads runtime system information
            PID:1485
            • /bin/sh
              sh -c "(crontab -l 2>/dev/null | grep -v '/var/tmp/.sysd' | crontab - 2>/dev/null) >/dev/null 2>&1"
              2⤵
                PID:1541
                • /usr/bin/crontab
                  crontab -
                  3⤵
                  • Creates/modifies Cron job
                  PID:1545
                • /bin/grep
                  grep -v /var/tmp/.sysd
                  3⤵
                    PID:1544
                  • /usr/bin/crontab
                    crontab -l
                    3⤵
                      PID:1543

                Network

                      MITRE ATT&CK Enterprise v16

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                      Downloads

                      systemd-network-update.service
                      • Path /etc/systemd/system/systemd-network-update.service
                      • Size 184B
                      • SHA256 2c0ed8e36e0603c11ba5613314d2bd2605e25777a5179c6264da034367c7c21c
                      • MD5 SHA1 SHA512 TLSH
                      Submit Download

                      tmp.3J5Vpd
                      • Path /var/spool/cron/crontabs/tmp.3J5Vpd
                      • Size 175B
                      • SHA256 3fd8c7fad3bc04bc8e51064e93639d075ff66b6e9fc86260757230beac61d04a
                      • MD5 SHA1 SHA512 TLSH
                      Submit Download

                      .sysd
                      • Path /var/tmp/.sysd
                      • Size 455KB
                      • SHA256 80828752354b3a770b7c63f46006334fc705c718d40cf3e1df1dc5a4f0fdf043
                      • MD5 SHA1 SHA512 SSDEEP TLSH
                      Submit Download

                      .sysd.lock
                      • Path /var/tmp/.sysd.lock
                      • Size 5B
                      • SHA256 93a90ba2021f69c8e65988d71645d53efd5fa0eedf3abec9094b496800cd696c
                      • MD5 SHA1 SHA512
                      Submit Download