Analysis

  • max time kernel
    150s
  • 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
    28/06/2026, 22:22

General

  • Target
    2026-06-28_5c5442eaf88d51da0eb38cbf0974ebea_amadey_elex_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe
  • Size 12.6MB
  • Sample260628-2aa1csft5v
  • SHA256 074ba102865f1f3f57cd996a030aa6ca249ca9e6d1fad7e3a600f6af223d47ce
  • 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\2026-06-28_5c5442eaf88d51da0eb38cbf0974ebea_amadey_elex_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-06-28_5c5442eaf88d51da0eb38cbf0974ebea_amadey_elex_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:6384
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\tlesfip\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:5816
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\rhheqcsq.exe" C:\Windows\SysWOW64\tlesfip\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:5576
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create tlesfip binPath= "C:\Windows\SysWOW64\tlesfip\rhheqcsq.exe /d\"C:\Users\Admin\AppData\Local\Temp\2026-06-28_5c5442eaf88d51da0eb38cbf0974ebea_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:5928
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description tlesfip "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:6128
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start tlesfip
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:596
    • 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:2728
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 6384 -s 1088
      2⤵
      • Program crash
      PID:6804
  • C:\Windows\SysWOW64\tlesfip\rhheqcsq.exe
    C:\Windows\SysWOW64\tlesfip\rhheqcsq.exe /d"C:\Users\Admin\AppData\Local\Temp\2026-06-28_5c5442eaf88d51da0eb38cbf0974ebea_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:700
    • 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:6412
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 700 -s 588
      2⤵
      • Program crash
      PID:7112
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 492 -p 700 -ip 700
    1⤵
      PID:4480
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 596 -p 6384 -ip 6384
      1⤵
        PID:5668

      Network

            MITRE ATT&CK Enterprise v16

            Replay Monitor

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            Downloads

            rhheqcsq.exe

            • Path C:\Users\Admin\AppData\Local\Temp\rhheqcsq.exe
            • Size 13.3MB
            • SHA256 1714a75f4e733dd998d7612c5a9ca0b5c432e135cff58f2da059ecc2abd21b97
            • MD5 SHA1 SHA512 SSDEEP TLSH

            memory/700-10-0x0000000000400000-0x000000000229F000-memory.dmp

            memory/700-12-0x0000000000400000-0x000000000229F000-memory.dmp

            memory/6384-1-0x0000000000400000-0x000000000229F000-memory.dmp

            memory/6384-3-0x0000000003F00000-0x0000000003F13000-memory.dmp

            memory/6384-4-0x00000000024E0000-0x00000000025E0000-memory.dmp

            memory/6384-13-0x0000000000400000-0x000000000229F000-memory.dmp

            memory/6412-8-0x0000000000C70000-0x0000000000C85000-memory.dmp

            memory/6412-14-0x0000000000C70000-0x0000000000C85000-memory.dmp

            memory/6412-15-0x0000000000C70000-0x0000000000C85000-memory.dmp