Overview

overview

9

Static

static

5

ntb.arm6

debian-12-armhf

9

Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    debian-12_armhf
  • resource
    debian12-armhf-20260513-en
  • resource tags

    arch:armhfimage:debian12-armhf-20260513-enkernel:6.1.0-17-armmp-lpaelocale:en-usos:debian-12-armhfsystem
  • submitted
    09/08/2026, 00:15

Sharing

Copy URL Twitter E-mail
Report Analysis Logs

General

  • Target
    ntb.arm6
  • Size 101KB
  • Sample260809-akac2axapc
  • SHA256 8a08cb03f4ca157a57a5fe513968397127a6a7104db59c5c8164782247feb1cf
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
9/10
antivmdefense_evasiondiscoveryexectionexecutionpersistenceprivilege_escalationupx

Malware Config

Signatures

  • Modifies the dynamic linker configuration file 2 TTPs 1 IoCs

    Malware can modify the configuration file of the dynamic linker to preload malicous libraries with every executed process.

    exectionpersistenceprivilege_escalationdefense_evasion
  • Executes dropped EXE 2 IoCs
  • Creates/modifies Cron job 1 TTPs 4 IoCs

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

    executionpersistenceprivilege_escalation
  • Creates/modifies environment variables 1 TTPs 2 IoCs

    Creating/modifying environment variables is a common persistence mechanism.

    persistenceprivilege_escalationdefense_evasion
  • Enumerates running processes

    Discovers information about currently running processes on the system

  • Modifies init.d 2 TTPs 2 IoCs

    Adds/modifies system service, likely for persistence.

    persistence
  • Modifies rc script 2 TTPs 2 IoCs

    Adding/modifying system rc scripts is a common persistence mechanism.

    persistence
  • Modifies systemd 2 TTPs 1 IoCs

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

    persistenceprivilege_escalation
  • Schedules an At job 1 TTPs 1 IoCs

    Schedules a job to be run using the at command.

    executionpersistenceprivilege_escalation
  • Modifies Bash startup script 2 TTPs 2 IoCs
    persistence
  • UPX packed file 1 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

    upx
  • Changes its process name 2 IoCs
  • Checks CPU configuration 1 TTPs 1 IoCs

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

    antivm
  • 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 2 IoCs

    Malware often drops required files in the /tmp directory.

Processes

  • /tmp/ntb.arm6
    /tmp/ntb.arm6
    1⤵
    • Modifies the dynamic linker configuration file
    • Creates/modifies Cron job
    • Creates/modifies environment variables
    • Modifies init.d
    • Modifies rc script
    • Modifies systemd
    • Modifies Bash startup script
    • Changes its process name
    • Checks CPU configuration
    • Reads runtime system information
    • Writes file to shm directory
    • Writes file to tmp directory
    PID:780
    • /bin/sh
      sh -c "systemctl daemon-reload 2>/dev/null"
      2⤵
        PID:790
        • /usr/bin/systemctl
          systemctl daemon-reload
          3⤵
            PID:794
        • /bin/sh
          sh -c "systemctl enable resolver-helper.service 2>/dev/null"
          2⤵
            PID:823
            • /usr/bin/systemctl
              systemctl enable resolver-helper.service
              3⤵
                PID:824
            • /bin/sh
              sh -c "systemctl start resolver-helper.service 2>/dev/null"
              2⤵
                PID:842
                • /usr/bin/systemctl
                  systemctl start resolver-helper.service
                  3⤵
                    PID:844
                • /bin/sh
                  sh -c "update-rc.d syshelper defaults 2>/dev/null"
                  2⤵
                    PID:846
                    • /usr/sbin/update-rc.d
                      update-rc.d syshelper defaults
                      3⤵
                        PID:847
                        • /usr/local/sbin/systemctl
                          systemctl daemon-reload
                          4⤵
                            PID:848
                          • /usr/local/bin/systemctl
                            systemctl daemon-reload
                            4⤵
                              PID:848
                            • /usr/sbin/systemctl
                              systemctl daemon-reload
                              4⤵
                                PID:848
                              • /usr/bin/systemctl
                                systemctl daemon-reload
                                4⤵
                                  PID:848
                            • /bin/sh
                              sh -c "chkconfig --add syshelper 2>/dev/null"
                              2⤵
                                PID:864
                              • /bin/sh
                                sh -c "chkconfig syshelper on 2>/dev/null"
                                2⤵
                                  PID:865
                                • /bin/sh
                                  sh -c "/etc/init.d/syshelper start 2>/dev/null"
                                  2⤵
                                  • Executes dropped EXE
                                  PID:866
                                  • /etc/init.d/syshelper
                                    /etc/init.d/syshelper start
                                    3⤵
                                    • Executes dropped EXE
                                    PID:867
                                • /bin/sh
                                  sh -c "echo '/tmp/.sys unknown' | at now + 1 minute 2>/dev/null"
                                  2⤵
                                    PID:869
                                    • /usr/bin/at
                                      at now + 1 minute
                                      3⤵
                                      • Creates/modifies Cron job
                                      • Schedules an At job
                                      PID:871
                                • /tmp/.sys
                                  /tmp/.sys unknown
                                  1⤵
                                  • Reads runtime system information
                                  PID:868

                                Network

                                      MITRE ATT&CK Enterprise v16

                                      Reconnaissance

                                      Resource Development

                                      Initial Access

                                      Execution

                                      Scheduled Task/Job

                                      2
                                      T1053

                                      At

                                      1
                                      T1053.002

                                      Cron

                                      1
                                      T1053.003

                                      Shared Modules

                                      1
                                      T1129

                                      Persistence

                                      Boot or Logon Autostart Execution

                                      4
                                      T1547

                                      XDG Autostart Entries

                                      1
                                      T1547.013

                                      Boot or Logon Initialization Scripts

                                      2
                                      T1037

                                      RC Scripts

                                      2
                                      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

                                      2
                                      T1574

                                      Dynamic Linker Hijacking

                                      1
                                      T1574.006

                                      Path Interception by PATH Environment Variable

                                      1
                                      T1574.007

                                      Scheduled Task/Job

                                      2
                                      T1053

                                      At

                                      1
                                      T1053.002

                                      Cron

                                      1
                                      T1053.003

                                      Privilege Escalation

                                      Boot or Logon Autostart Execution

                                      4
                                      T1547

                                      XDG Autostart Entries

                                      1
                                      T1547.013

                                      Boot or Logon Initialization Scripts

                                      2
                                      T1037

                                      RC Scripts

                                      2
                                      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

                                      2
                                      T1574

                                      Dynamic Linker Hijacking

                                      1
                                      T1574.006

                                      Path Interception by PATH Environment Variable

                                      1
                                      T1574.007

                                      Scheduled Task/Job

                                      2
                                      T1053

                                      At

                                      1
                                      T1053.002

                                      Cron

                                      1
                                      T1053.003

                                      Defense Evasion

                                      Hijack Execution Flow

                                      2
                                      T1574

                                      Dynamic Linker Hijacking

                                      1
                                      T1574.006

                                      Path Interception by PATH Environment Variable

                                      1
                                      T1574.007

                                      Virtualization/Sandbox Evasion

                                      1
                                      T1497

                                      System Checks

                                      1
                                      T1497.001

                                      Credential Access

                                      Discovery

                                      Virtualization/Sandbox Evasion

                                      1
                                      T1497

                                      System Checks

                                      1
                                      T1497.001

                                      Lateral Movement

                                      Collection

                                      Command and Control

                                      Exfiltration

                                      Impact

                                      Replay Monitor

                                      Loading Replay Monitor...

                                      Downloads

                                      rcS
                                      • Path /etc/init.d/rcS
                                      • Size 21B
                                      • SHA256 d2ba62c5dfead9118eeb89c22c3e4c38b6494407c4c976e487664ea6352368df
                                      • MD5 SHA1 SHA512
                                      Submit Download

                                      syshelper
                                      • Path /etc/init.d/syshelper
                                      • Size 409B
                                      • SHA256 006e687bfbef0854e7c4a59c9c78b87c470e25badfdcb4c3ed2382c5d61b5e90
                                      • MD5 SHA1 SHA512 TLSH
                                      Submit Download

                                      inittab
                                      • Path /etc/inittab
                                      • Size 29B
                                      • SHA256 1d896113670eaf02603a5165f93fdf963a548f181dc06357b1a038a722a56972
                                      • MD5 SHA1 SHA512
                                      Submit Download

                                      syshelper.sh
                                      • Path /etc/profile.d/syshelper.sh
                                      • Size 30B
                                      • SHA256 2757007b591de047b3436ea483e340a301f41807479ddb267a32f42b695f8dd1
                                      • MD5 SHA1 SHA512
                                      Submit Download

                                      resolver-helper.service
                                      • Path /etc/systemd/system/resolver-helper.service
                                      • Size 162B
                                      • SHA256 54fb322ff7f0b3bae4ace80f06c02c42231238ec41ac7e722cd86ffcda6e4a1c
                                      • MD5 SHA1 SHA512 TLSH
                                      Submit Download

                                      .name
                                      • Path /tmp/.name
                                      • Size 8B
                                      • SHA256 0e3023ad860f74e5ce2badea602ed485a104a730a7c3d71dfcd8265d1cdde26f
                                      • MD5 SHA1 SHA512
                                      Submit Download

                                      .sys
                                      • Path /tmp/.sys
                                      • Size 101KB
                                      • SHA256 8a08cb03f4ca157a57a5fe513968397127a6a7104db59c5c8164782247feb1cf
                                      • MD5 SHA1 SHA512 SSDEEP TLSH
                                      Submit Download

                                      a0000101c64350
                                      • Path /var/spool/cron/atjobs/a0000101c64350
                                      • Size 427B
                                      • SHA256 88d547de3da94a1ccf356b16da2310525903238c65a815e50a14d7f8822f66d4
                                      • MD5 SHA1 SHA512 TLSH
                                      Submit Download

                                      root
                                      • Path /var/spool/cron/crontabs/root
                                      • Size 47B
                                      • SHA256 fd48d43a55451a39aea34e389f01289760d138675bfeee7fa2b94593da3966f6
                                      • MD5 SHA1 SHA512
                                      Submit Download