Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260618-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260618-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    29/06/2026, 10:43

General

  • Target
    2026-06-27_000fb0e71dcda3d3434db80bed3a397e_amadey_elex_glassworm_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe
  • Size 13.3MB
  • Sample260629-msjynaa12x
  • SHA256 3f9f8724c26c402b43f99157de88af0bb32581bf91200a44b893c86d46a17fd5
  • 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
  • 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\2026-06-27_000fb0e71dcda3d3434db80bed3a397e_amadey_elex_glassworm_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-06-27_000fb0e71dcda3d3434db80bed3a397e_amadey_elex_glassworm_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3392
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\rxixsxde\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:5476
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ugwjxwos.exe" C:\Windows\SysWOW64\rxixsxde\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1240
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create rxixsxde binPath= "C:\Windows\SysWOW64\rxixsxde\ugwjxwos.exe /d\"C:\Users\Admin\AppData\Local\Temp\2026-06-27_000fb0e71dcda3d3434db80bed3a397e_amadey_elex_glassworm_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:1916
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description rxixsxde "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3264
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start rxixsxde
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:984
    • 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:5308
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3392 -s 1088
      2⤵
      • Program crash
      PID:5256
  • C:\Windows\SysWOW64\rxixsxde\ugwjxwos.exe
    C:\Windows\SysWOW64\rxixsxde\ugwjxwos.exe /d"C:\Users\Admin\AppData\Local\Temp\2026-06-27_000fb0e71dcda3d3434db80bed3a397e_amadey_elex_glassworm_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:4888
    • 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:712
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4888 -s 592
      2⤵
      • Program crash
      PID:4580
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 492 -p 3392 -ip 3392
    1⤵
      PID:2420
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 624 -p 4888 -ip 4888
      1⤵
        PID:464

      Network

            MITRE ATT&CK Enterprise v16

            Replay Monitor

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            Downloads

            ugwjxwos.exe

            • Path C:\Users\Admin\AppData\Local\Temp\ugwjxwos.exe
            • Size 11.9MB
            • SHA256 67271bd749b6a4c70f61ed6ac12d4ee16e86516ed8fadbdca92cc11149b01307
            • MD5 SHA1 SHA512 SSDEEP TLSH

            memory/712-7-0x0000000001210000-0x0000000001225000-memory.dmp

            memory/712-12-0x0000000001210000-0x0000000001225000-memory.dmp

            memory/712-13-0x0000000001210000-0x0000000001225000-memory.dmp

            memory/3392-1-0x0000000000B60000-0x0000000000C60000-memory.dmp

            memory/3392-2-0x0000000002600000-0x0000000002613000-memory.dmp

            memory/3392-10-0x0000000002600000-0x0000000002613000-memory.dmp