Analysis

  • max time kernel
    150s
  • max time network
    149s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    21/08/2026, 00:42

General

  • Target
    2026-08-20_29a8923232e4554ee1a505be94a834a6_amadey_elex_njrat_redline-stealer_rhadamanthys_smoke-loader_stop_tofsee.exe
  • Size 10.9MB
  • Sample260821-a2ts1agg77
  • SHA256 db08dfe7f810eb02f1f94cb3fd348d70156620b6bf74a9bd736e98a98671d372
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • tofsee

C2
  • svartalfheim.top

  • 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.

  • 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 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\2026-08-20_29a8923232e4554ee1a505be94a834a6_amadey_elex_njrat_redline-stealer_rhadamanthys_smoke-loader_stop_tofsee.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-08-20_29a8923232e4554ee1a505be94a834a6_amadey_elex_njrat_redline-stealer_rhadamanthys_smoke-loader_stop_tofsee.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5700
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\xhrvhdot\
      2⤵
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      PID:4164
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\uwzkfzop.exe" C:\Windows\SysWOW64\xhrvhdot\
      2⤵
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      PID:4420
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create xhrvhdot binPath= "C:\Windows\SysWOW64\xhrvhdot\uwzkfzop.exe /d\"C:\Users\Admin\AppData\Local\Temp\2026-08-20_29a8923232e4554ee1a505be94a834a6_amadey_elex_njrat_redline-stealer_rhadamanthys_smoke-loader_stop_tofsee.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4076
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description xhrvhdot "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3952
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start xhrvhdot
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:5588
    • 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:5740
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 5700 -s 956
      2⤵
      • Program crash
      PID:1388
  • C:\Windows\SysWOW64\xhrvhdot\uwzkfzop.exe
    C:\Windows\SysWOW64\xhrvhdot\uwzkfzop.exe /d"C:\Users\Admin\AppData\Local\Temp\2026-08-20_29a8923232e4554ee1a505be94a834a6_amadey_elex_njrat_redline-stealer_rhadamanthys_smoke-loader_stop_tofsee.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1840
    • 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:4124
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1840 -s 596
      2⤵
      • Program crash
      PID:5200
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 492 -p 5700 -ip 5700
    1⤵
      PID:5376
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 568 -p 1840 -ip 1840
      1⤵
        PID:2456

      Network

            MITRE ATT&CK Enterprise v16

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            Downloads

            uwzkfzop.exe

            • Path C:\Users\Admin\AppData\Local\Temp\uwzkfzop.exe
            • Size 14.4MB
            • SHA256 00bf52f4a4a138e778727696c7f1658f751fa5b8c043d081651c58c35f53e895
            • MD5 SHA1 SHA512 SSDEEP TLSH

            memory/4124-9-0x0000000000F50000-0x0000000000F65000-memory.dmp

            memory/4124-11-0x0000000000F50000-0x0000000000F65000-memory.dmp

            memory/4124-12-0x0000000000F50000-0x0000000000F65000-memory.dmp

            memory/5700-1-0x0000000002E70000-0x0000000002F70000-memory.dmp

            memory/5700-2-0x0000000004950000-0x0000000004963000-memory.dmp

            memory/5700-8-0x0000000004950000-0x0000000004963000-memory.dmp