Analysis

  • max time kernel
    150s
  • max time network
    144s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260130-en
  • resource tags

    arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    04/05/2026, 15:03

General

  • Target
    2026-05-04_ace69063ed81f450b7725f61f3eceb5a_amadey_elex_njrat_redline-stealer_rhadamanthys_smoke-loader_stop_tofsee.exe
  • Size 14.3MB
  • Sample260504-se329set6x
  • SHA256 e2d1ab1fa0520183976d099b74c66db2a3ea577fb5e69dfd3cbc796b9ffbc81f
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • tofsee

C2
  • svartalfheim.top

  • jotunheim.name

Signatures

  • Family: Tofsee

    Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Sets service image path in registry 3 TTPs 1 IoCs

    This determines the executable launched when a service starts. It can be used to establish persistence.

  • Creates new service(s) 2 TTPs
  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Stops running service(s) 4 TTPs
  • Suspicious use of SetThreadContext 1 IoCs
  • Launches sc.exe 3 IoCs

    Sc.exe is a Windows utlilty to control services on the system.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

    Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

  • Program crash 2 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2026-05-04_ace69063ed81f450b7725f61f3eceb5a_amadey_elex_njrat_redline-stealer_rhadamanthys_smoke-loader_stop_tofsee.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-05-04_ace69063ed81f450b7725f61f3eceb5a_amadey_elex_njrat_redline-stealer_rhadamanthys_smoke-loader_stop_tofsee.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4324
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\jrccqwqw\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4828
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vutuvfhk.exe" C:\Windows\SysWOW64\jrccqwqw\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:784
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create jrccqwqw binPath= "C:\Windows\SysWOW64\jrccqwqw\vutuvfhk.exe /d\"C:\Users\Admin\AppData\Local\Temp\2026-05-04_ace69063ed81f450b7725f61f3eceb5a_amadey_elex_njrat_redline-stealer_rhadamanthys_smoke-loader_stop_tofsee.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2704
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description jrccqwqw "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2584
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start jrccqwqw
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:5036
    • C:\Windows\SysWOW64\netsh.exe
      "C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
      2⤵
      • Modifies Windows Firewall
      • Event Triggered Execution: Netsh Helper DLL
      • System Location Discovery: System Language Discovery
      PID:1800
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4324 -s 1252
      2⤵
      • Program crash
      PID:5716
  • C:\Windows\SysWOW64\jrccqwqw\vutuvfhk.exe
    C:\Windows\SysWOW64\jrccqwqw\vutuvfhk.exe /d"C:\Users\Admin\AppData\Local\Temp\2026-05-04_ace69063ed81f450b7725f61f3eceb5a_amadey_elex_njrat_redline-stealer_rhadamanthys_smoke-loader_stop_tofsee.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1760
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Sets service image path in registry
      • Deletes itself
      • System Location Discovery: System Language Discovery
      PID:4620
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1760 -s 564
      2⤵
      • Program crash
      PID:5188
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 4324 -ip 4324
    1⤵
      PID:5432
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 1760 -ip 1760
      1⤵
        PID:2748

      Network

            MITRE ATT&CK Enterprise v16

            Replay Monitor

            Loading Replay Monitor...

            Downloads

            vutuvfhk.exe

            • Path C:\Users\Admin\AppData\Local\Temp\vutuvfhk.exe
            • Size 13.6MB
            • SHA256 916575070f713f4ca9f3b1884be0bde65e7a89a8e3b8da134f89b21410c0beba
            • MD5 SHA1 SHA512 SSDEEP TLSH

            memory/1800-10-0x0000000003140000-0x00000000031A4000-memory.dmp

            memory/4324-1-0x0000000002CD0000-0x0000000002DD0000-memory.dmp

            memory/4324-2-0x00000000048E0000-0x00000000048F3000-memory.dmp

            memory/4324-8-0x0000000004950000-0x00000000049B4000-memory.dmp

            memory/4324-9-0x00000000048E0000-0x00000000048F3000-memory.dmp

            memory/4620-11-0x00000000008C0000-0x00000000008D5000-memory.dmp

            memory/4620-13-0x00000000008C0000-0x00000000008D5000-memory.dmp

            memory/4620-15-0x00000000008C0000-0x00000000008D5000-memory.dmp