Analysis

  • max time kernel
    150s
  • max time network
    149s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260706-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260706-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    08/07/2026, 04:48

General

  • Target
    2026-07-08_320a79dee55cf23e3ba089795cb652ae_amadey_elex_njrat_remcos_rhadamanthys_smoke-loader_stealc.exe
  • Size 12.0MB
  • Sample260708-fffbdaa16z
  • SHA256 999dfd9dde7e9c8aa5c49a38c44e996f184140695642284af47d49133e4af245
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • tofsee

C2
  • vanaheim.cn

  • 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 IoCs
  • Executes dropped EXE 1 IoCs
  • 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\2026-07-08_320a79dee55cf23e3ba089795cb652ae_amadey_elex_njrat_remcos_rhadamanthys_smoke-loader_stealc.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-07-08_320a79dee55cf23e3ba089795cb652ae_amadey_elex_njrat_remcos_rhadamanthys_smoke-loader_stealc.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5232
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\smpzffen\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:5488
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ajpaynf.exe" C:\Windows\SysWOW64\smpzffen\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1368
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create smpzffen binPath= "C:\Windows\SysWOW64\smpzffen\ajpaynf.exe /d\"C:\Users\Admin\AppData\Local\Temp\2026-07-08_320a79dee55cf23e3ba089795cb652ae_amadey_elex_njrat_remcos_rhadamanthys_smoke-loader_stealc.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1476
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description smpzffen "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2660
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start smpzffen
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1592
    • 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:820
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 5232 -s 824
      2⤵
      • Program crash
      PID:5476
  • C:\Windows\SysWOW64\smpzffen\ajpaynf.exe
    C:\Windows\SysWOW64\smpzffen\ajpaynf.exe /d"C:\Users\Admin\AppData\Local\Temp\2026-07-08_320a79dee55cf23e3ba089795cb652ae_amadey_elex_njrat_remcos_rhadamanthys_smoke-loader_stealc.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1460
    • 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:3796
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1460 -s 612
      2⤵
      • Program crash
      PID:6124
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 512 -p 5232 -ip 5232
    1⤵
      PID:4988
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 548 -p 1460 -ip 1460
      1⤵
        PID:1844

      Network

            MITRE ATT&CK Enterprise v16

            Replay Monitor

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            Downloads

            ajpaynf.exe

            • Path C:\Users\Admin\AppData\Local\Temp\ajpaynf.exe
            • Size 11.5MB
            • SHA256 00ef03c7beea53f933091808ae524c6e78d3f367504a65e4d4214e242b223038
            • MD5 SHA1 SHA512 SSDEEP TLSH

            memory/3796-7-0x0000000000430000-0x0000000000445000-memory.dmp

            memory/3796-12-0x0000000000430000-0x0000000000445000-memory.dmp

            memory/3796-13-0x0000000000430000-0x0000000000445000-memory.dmp

            memory/5232-1-0x00000000028A0000-0x00000000029A0000-memory.dmp

            memory/5232-2-0x0000000002880000-0x0000000002893000-memory.dmp

            memory/5232-10-0x0000000002880000-0x0000000002893000-memory.dmp