Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260617-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260617-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    28/06/2026, 21:42

General

  • Target
    2026-06-28_72adaf2c7edc4038e4b8fbbfbef42d27_amadey_elex_njrat_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe
  • Size 13.5MB
  • Sample260628-1kdcssfv7r
  • SHA256 afe35bd93bbe0cba98ba926d1c22f2f86b1b42bc93b944d2b79e843c4cd65a4a
  • 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.

  • 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_72adaf2c7edc4038e4b8fbbfbef42d27_amadey_elex_njrat_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-06-28_72adaf2c7edc4038e4b8fbbfbef42d27_amadey_elex_njrat_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2712
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\buxbhxsq\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:696
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ubilaohr.exe" C:\Windows\SysWOW64\buxbhxsq\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:3168
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create buxbhxsq binPath= "C:\Windows\SysWOW64\buxbhxsq\ubilaohr.exe /d\"C:\Users\Admin\AppData\Local\Temp\2026-06-28_72adaf2c7edc4038e4b8fbbfbef42d27_amadey_elex_njrat_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:4656
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description buxbhxsq "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4792
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start buxbhxsq
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:5756
    • 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:4756
  • C:\Windows\SysWOW64\buxbhxsq\ubilaohr.exe
    C:\Windows\SysWOW64\buxbhxsq\ubilaohr.exe /d"C:\Users\Admin\AppData\Local\Temp\2026-06-28_72adaf2c7edc4038e4b8fbbfbef42d27_amadey_elex_njrat_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:4572
    • 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:1108

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        ubilaohr.exe

        • Path C:\Users\Admin\AppData\Local\Temp\ubilaohr.exe
        • Size 14.2MB
        • SHA256 67ff363f82b7e2602fc9402eadb400753509896a5c23634324db219c811d8699
        • MD5 SHA1 SHA512 SSDEEP TLSH

        memory/1108-7-0x0000000000B90000-0x0000000000BA5000-memory.dmp

        memory/1108-12-0x0000000000B90000-0x0000000000BA5000-memory.dmp

        memory/1108-13-0x0000000000B90000-0x0000000000BA5000-memory.dmp

        memory/2712-1-0x0000000002540000-0x0000000002640000-memory.dmp

        memory/2712-2-0x0000000004080000-0x0000000004093000-memory.dmp

        memory/2712-11-0x0000000004080000-0x0000000004093000-memory.dmp