Analysis

  • max time kernel
    148s
  • max time network
    149s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260513-en
  • resource tags

    arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    05/06/2026, 16:21

General

  • Target
    2026-06-05_c64256dd865d74926590b4112b4e5c24_amadey_elex_remcos_rhadamanthys_smoke-loader_stealc.exe
  • Size 14.4MB
  • Sample260605-tty8asa13s
  • SHA256 7d345ba22c3a502e8374e019982b3795cb7ea80debe8bf0fb34182f10250d49c
  • 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.

  • 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
  • Drops file in System32 directory 2 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.

  • Modifies data under HKEY_USERS 7 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2026-06-05_c64256dd865d74926590b4112b4e5c24_amadey_elex_remcos_rhadamanthys_smoke-loader_stealc.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-06-05_c64256dd865d74926590b4112b4e5c24_amadey_elex_remcos_rhadamanthys_smoke-loader_stealc.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:904
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\eoogjoyx\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:848
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\rdliobhf.exe" C:\Windows\SysWOW64\eoogjoyx\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4860
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create eoogjoyx binPath= "C:\Windows\SysWOW64\eoogjoyx\rdliobhf.exe /d\"C:\Users\Admin\AppData\Local\Temp\2026-06-05_c64256dd865d74926590b4112b4e5c24_amadey_elex_remcos_rhadamanthys_smoke-loader_stealc.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3680
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description eoogjoyx "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1240
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start eoogjoyx
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4428
    • 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:3268
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 904 -s 1104
      2⤵
      • Program crash
      PID:5608
  • C:\Windows\SysWOW64\eoogjoyx\rdliobhf.exe
    C:\Windows\SysWOW64\eoogjoyx\rdliobhf.exe /d"C:\Users\Admin\AppData\Local\Temp\2026-06-05_c64256dd865d74926590b4112b4e5c24_amadey_elex_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:5432
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Sets service image path in registry
      • Deletes itself
      • Drops file in System32 directory
      • System Location Discovery: System Language Discovery
      • Modifies data under HKEY_USERS
      PID:6008
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 5432 -s 560
      2⤵
      • Program crash
      PID:3776
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 5432 -ip 5432
    1⤵
      PID:4508
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 516 -p 904 -ip 904
      1⤵
        PID:3904

      Network

            MITRE ATT&CK Enterprise v16

            Replay Monitor

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            Downloads

            rdliobhf.exe

            • Path C:\Users\Admin\AppData\Local\Temp\rdliobhf.exe
            • Size 11.6MB
            • SHA256 56f5f610a10a23ccc868890a4243923b37df689ff68ae20f221f9caa89ab4db4
            • MD5 SHA1 SHA512 SSDEEP TLSH

            memory/904-10-0x0000000000400000-0x0000000002599000-memory.dmp

            memory/904-1-0x0000000002790000-0x0000000002890000-memory.dmp

            memory/904-2-0x0000000002740000-0x0000000002753000-memory.dmp

            memory/904-11-0x0000000002740000-0x0000000002753000-memory.dmp

            memory/5432-9-0x0000000000400000-0x0000000002599000-memory.dmp

            memory/6008-39-0x00000000010B0000-0x00000000010C0000-memory.dmp

            memory/6008-34-0x00000000010B0000-0x00000000010C0000-memory.dmp

            memory/6008-13-0x00000000004A0000-0x00000000004B5000-memory.dmp

            memory/6008-15-0x0000000002400000-0x000000000260F000-memory.dmp

            memory/6008-26-0x00000000010B0000-0x00000000010C0000-memory.dmp

            memory/6008-45-0x00000000011C0000-0x00000000011C5000-memory.dmp

            memory/6008-42-0x00000000011C0000-0x00000000011C5000-memory.dmp

            memory/6008-50-0x00000000011D0000-0x00000000011D7000-memory.dmp

            memory/6008-41-0x00000000010B0000-0x00000000010C0000-memory.dmp

            memory/6008-40-0x00000000010B0000-0x00000000010C0000-memory.dmp

            memory/6008-7-0x00000000004A0000-0x00000000004B5000-memory.dmp

            memory/6008-38-0x00000000010B0000-0x00000000010C0000-memory.dmp

            memory/6008-37-0x00000000010B0000-0x00000000010C0000-memory.dmp

            memory/6008-36-0x00000000010B0000-0x00000000010C0000-memory.dmp

            memory/6008-35-0x00000000010B0000-0x00000000010C0000-memory.dmp

            memory/6008-12-0x00000000004A0000-0x00000000004B5000-memory.dmp

            memory/6008-33-0x00000000010B0000-0x00000000010C0000-memory.dmp

            memory/6008-32-0x00000000010B0000-0x00000000010C0000-memory.dmp

            memory/6008-31-0x00000000010B0000-0x00000000010C0000-memory.dmp

            memory/6008-30-0x00000000010B0000-0x00000000010C0000-memory.dmp

            memory/6008-29-0x00000000010B0000-0x00000000010C0000-memory.dmp

            memory/6008-28-0x00000000010B0000-0x00000000010C0000-memory.dmp

            memory/6008-27-0x00000000010B0000-0x00000000010C0000-memory.dmp

            memory/6008-22-0x00000000010B0000-0x00000000010C0000-memory.dmp

            memory/6008-19-0x00000000010A0000-0x00000000010A6000-memory.dmp

            memory/6008-18-0x0000000002400000-0x000000000260F000-memory.dmp

            memory/6008-46-0x0000000007300000-0x000000000770B000-memory.dmp

            memory/6008-25-0x00000000010B0000-0x00000000010C0000-memory.dmp

            memory/6008-49-0x0000000007300000-0x000000000770B000-memory.dmp