Analysis

  • max time kernel
    148s
  • max time network
    153s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260706-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260706-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    07/07/2026, 23:04

General

  • Target
    2026-07-07_7d06f6653b2e38139d6f74eb3bcce7e7_amadey_elex_njrat_remcos_rhadamanthys_smoke-loader_stealc.exe
  • Size 10.9MB
  • Sample260707-22ms8sfx2w
  • SHA256 1e733ccb9bf56d6d350d6896f6bed018d5821f04563101e4f85d834942833114
  • 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\2026-07-07_7d06f6653b2e38139d6f74eb3bcce7e7_amadey_elex_njrat_remcos_rhadamanthys_smoke-loader_stealc.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-07-07_7d06f6653b2e38139d6f74eb3bcce7e7_amadey_elex_njrat_remcos_rhadamanthys_smoke-loader_stealc.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2452
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\yybjxnns\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:5072
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jqxapdwg.exe" C:\Windows\SysWOW64\yybjxnns\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:6128
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create yybjxnns binPath= "C:\Windows\SysWOW64\yybjxnns\jqxapdwg.exe /d\"C:\Users\Admin\AppData\Local\Temp\2026-07-07_7d06f6653b2e38139d6f74eb3bcce7e7_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:3940
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description yybjxnns "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3236
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start yybjxnns
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2832
    • 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:2848
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2452 -s 1096
      2⤵
      • Program crash
      PID:1784
  • C:\Windows\SysWOW64\yybjxnns\jqxapdwg.exe
    C:\Windows\SysWOW64\yybjxnns\jqxapdwg.exe /d"C:\Users\Admin\AppData\Local\Temp\2026-07-07_7d06f6653b2e38139d6f74eb3bcce7e7_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:3044
    • 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:2952
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3044 -s 592
      2⤵
      • Program crash
      PID:5784
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 516 -p 2452 -ip 2452
    1⤵
      PID:720
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 3044 -ip 3044
      1⤵
        PID:4588

      Network

            MITRE ATT&CK Enterprise v16

            Replay Monitor

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            Downloads

            jqxapdwg.exe

            • Path C:\Users\Admin\AppData\Local\Temp\jqxapdwg.exe
            • Size 12.9MB
            • SHA256 f0258c86886e489c411e549fa82628532e3c5d90db26b539702542d93bc2e0f5
            • MD5 SHA1 SHA512 SSDEEP TLSH

            memory/2452-1-0x00000000027B0000-0x00000000028B0000-memory.dmp

            memory/2452-2-0x0000000004340000-0x0000000004353000-memory.dmp

            memory/2452-11-0x0000000004340000-0x0000000004353000-memory.dmp

            memory/2952-7-0x0000000000790000-0x00000000007A5000-memory.dmp

            memory/2952-12-0x0000000000790000-0x00000000007A5000-memory.dmp

            memory/2952-13-0x0000000000790000-0x00000000007A5000-memory.dmp