Analysis

  • max time kernel
    150s
  • max time network
    147s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    11/07/2026, 04:14

General

  • Target
    2026-07-11_ba39142b460a9bcfcbfbed4b2aed9c62_amadey_elex_njrat_remcos_rhadamanthys_smoke-loader_stealc.exe
  • Size 12.9MB
  • Sample260711-etvsjsbt6m
  • SHA256 7cd850128f4345bb2977b9d378a416f8baa7fd355ef3a821c8bc980a360f0bfe
  • 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
  • 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\2026-07-11_ba39142b460a9bcfcbfbed4b2aed9c62_amadey_elex_njrat_remcos_rhadamanthys_smoke-loader_stealc.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-07-11_ba39142b460a9bcfcbfbed4b2aed9c62_amadey_elex_njrat_remcos_rhadamanthys_smoke-loader_stealc.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2900
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\tutitack\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:3872
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vlhwrjhp.exe" C:\Windows\SysWOW64\tutitack\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4176
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create tutitack binPath= "C:\Windows\SysWOW64\tutitack\vlhwrjhp.exe /d\"C:\Users\Admin\AppData\Local\Temp\2026-07-11_ba39142b460a9bcfcbfbed4b2aed9c62_amadey_elex_njrat_remcos_rhadamanthys_smoke-loader_stealc.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3452
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description tutitack "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2724
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start tutitack
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:6032
    • 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:5736
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2900 -s 1084
      2⤵
      • Program crash
      PID:4532
  • C:\Windows\SysWOW64\tutitack\vlhwrjhp.exe
    C:\Windows\SysWOW64\tutitack\vlhwrjhp.exe /d"C:\Users\Admin\AppData\Local\Temp\2026-07-11_ba39142b460a9bcfcbfbed4b2aed9c62_amadey_elex_njrat_remcos_rhadamanthys_smoke-loader_stealc.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4800
    • 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:2132
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4800 -s 592
      2⤵
      • Program crash
      PID:2240
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 4800 -ip 4800
    1⤵
      PID:1332
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 2900 -ip 2900
      1⤵
        PID:4320

      Network

            MITRE ATT&CK Enterprise v16

            Replay Monitor

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            Downloads

            vlhwrjhp.exe

            • Path C:\Users\Admin\AppData\Local\Temp\vlhwrjhp.exe
            • Size 11.6MB
            • SHA256 2a2b5ce070c47139e7e85113f1b127667f513013ecb5e2af16d8401b2a13dda5
            • MD5 SHA1 SHA512 SSDEEP TLSH

            memory/2132-7-0x0000000000CD0000-0x0000000000CE5000-memory.dmp

            memory/2132-12-0x0000000000CD0000-0x0000000000CE5000-memory.dmp

            memory/2132-13-0x0000000000CD0000-0x0000000000CE5000-memory.dmp

            memory/2900-1-0x00000000026C0000-0x00000000027C0000-memory.dmp

            memory/2900-2-0x0000000004320000-0x0000000004333000-memory.dmp

            memory/2900-11-0x0000000004320000-0x0000000004333000-memory.dmp