Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260911-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    17/10/2026, 21:46

General

  • Target
    2026-10-16_23e1a6291e854a84e71f4cca1d432aee_amadey_elex_njrat_redline-stealer_rhadamanthys_smoke-loader_stop_tofsee.exe
  • Size 13.6MB
  • Sample261017-1mtskaw18m
  • SHA256 1034f0f6aa11066b43feb33779cce3e15971d4ea1d0c87e11a4dc9f39aa0cc0d
  • 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.

  • Windows security bypass 2 TTPs 1 IoCs
  • 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 TTPs 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.

  • Executes a command shell one-liner 1 TTPs 2 IoCs

    Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

  • 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\2026-10-16_23e1a6291e854a84e71f4cca1d432aee_amadey_elex_njrat_redline-stealer_rhadamanthys_smoke-loader_stop_tofsee.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-10-16_23e1a6291e854a84e71f4cca1d432aee_amadey_elex_njrat_redline-stealer_rhadamanthys_smoke-loader_stop_tofsee.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5688
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hkyefjhw\
      2⤵
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      PID:1456
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\xntafrvk.exe" C:\Windows\SysWOW64\hkyefjhw\
      2⤵
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      PID:5928
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create hkyefjhw binPath= "C:\Windows\SysWOW64\hkyefjhw\xntafrvk.exe /d\"C:\Users\Admin\AppData\Local\Temp\2026-10-16_23e1a6291e854a84e71f4cca1d432aee_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:2896
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description hkyefjhw "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4776
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start hkyefjhw
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3096
    • 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:4904
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 5688 -s 1096
      2⤵
      • Program crash
      PID:1928
  • C:\Windows\SysWOW64\hkyefjhw\xntafrvk.exe
    C:\Windows\SysWOW64\hkyefjhw\xntafrvk.exe /d"C:\Users\Admin\AppData\Local\Temp\2026-10-16_23e1a6291e854a84e71f4cca1d432aee_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:1960
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Windows security bypass
      • Sets service image path in registry
      • Deletes itself
      • System Location Discovery: System Language Discovery
      PID:4756
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1960 -s 592
      2⤵
      • Program crash
      PID:808
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 492 -p 5688 -ip 5688
    1⤵
      PID:4632
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 576 -p 1960 -ip 1960
      1⤵
        PID:4924

      Network

            MITRE ATT&CK Enterprise v16

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            Downloads

            xntafrvk.exe

            • Path C:\Users\Admin\AppData\Local\Temp\xntafrvk.exe
            • Size 13.4MB
            • SHA256 4c33fc073938c1eca43da8a899b2cf62a9d9fae498b0ab1d11fa7fc94bc3088a
            • MD5 SHA1 SHA512 SSDEEP TLSH

            memory/4756-10-0x0000000001250000-0x0000000001265000-memory.dmp

            memory/4756-12-0x0000000001250000-0x0000000001265000-memory.dmp

            memory/4756-13-0x0000000001250000-0x0000000001265000-memory.dmp

            memory/5688-1-0x0000000002F20000-0x0000000003020000-memory.dmp

            memory/5688-2-0x0000000002E90000-0x0000000002EA3000-memory.dmp

            memory/5688-9-0x0000000002E90000-0x0000000002EA3000-memory.dmp