Analysis

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

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    30/10/2026, 02:26

General

  • Target
    2026-10-28_6de371dfb11d4c8ced31509ebb612a26_amadey_elex_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe
  • Size 13.4MB
  • Sample261030-cxcd9sda84
  • SHA256 e5adcf17ed00f8588b79e0e605c38030ee2fa3fb647ca668d4fe32a634afe795
  • 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 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 6 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\2026-10-28_6de371dfb11d4c8ced31509ebb612a26_amadey_elex_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-10-28_6de371dfb11d4c8ced31509ebb612a26_amadey_elex_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3600
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\eyuaxdms\
      2⤵
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      PID:796
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\uxunegaq.exe" C:\Windows\SysWOW64\eyuaxdms\
      2⤵
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      PID:3340
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create eyuaxdms binPath= "C:\Windows\SysWOW64\eyuaxdms\uxunegaq.exe /d\"C:\Users\Admin\AppData\Local\Temp\2026-10-28_6de371dfb11d4c8ced31509ebb612a26_amadey_elex_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1156
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description eyuaxdms "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:480
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start eyuaxdms
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1488
    • 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:2348
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3600 -s 1224
      2⤵
      • Program crash
      PID:1988
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3600 -s 696
      2⤵
      • Program crash
      PID:4224
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3600 -s 1232
      2⤵
      • Program crash
      PID:2352
  • C:\Windows\SysWOW64\eyuaxdms\uxunegaq.exe
    C:\Windows\SysWOW64\eyuaxdms\uxunegaq.exe /d"C:\Users\Admin\AppData\Local\Temp\2026-10-28_6de371dfb11d4c8ced31509ebb612a26_amadey_elex_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2388
    • 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:2536
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2388 -s 576
      2⤵
      • Program crash
      PID:4656
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2388 -s 588
      2⤵
      • Program crash
      PID:5648
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2388 -s 560
      2⤵
      • Program crash
      PID:1308
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 3600 -ip 3600
    1⤵
      PID:4652
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 2388 -ip 2388
      1⤵
        PID:5764
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 240 -p 2388 -ip 2388
        1⤵
          PID:2576
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 3600 -ip 3600
          1⤵
            PID:908
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -pss -s 596 -p 2388 -ip 2388
            1⤵
              PID:828
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 3600 -ip 3600
              1⤵
                PID:3428

              Network

                    MITRE ATT&CK Enterprise v16

                    Replay Monitor

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                    Downloads

                    uxunegaq.exe

                    • Path C:\Users\Admin\AppData\Local\Temp\uxunegaq.exe
                    • Size 12.8MB
                    • SHA256 bea82a803f26129bf5fc90437c3d6d783f2ccee9e42a9457aafe78cbc00c4273
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    memory/2388-12-0x0000000000400000-0x0000000001F14000-memory.dmp

                    memory/2536-8-0x0000000000540000-0x0000000000555000-memory.dmp

                    memory/2536-13-0x0000000000540000-0x0000000000555000-memory.dmp

                    memory/2536-14-0x0000000000540000-0x0000000000555000-memory.dmp

                    memory/3600-2-0x00000000025B0000-0x00000000025C3000-memory.dmp

                    memory/3600-1-0x00000000021B0000-0x00000000022B0000-memory.dmp

                    memory/3600-11-0x00000000025B0000-0x00000000025C3000-memory.dmp

                    memory/3600-10-0x0000000000400000-0x0000000001F14000-memory.dmp