Analysis
- max time kernel
149s - max time network
147s - platform
windows10-2004_x64 - resource
win10v2004-20260911-en - resource tags
- submitted
07/10/2026, 23:24
General
- Target 2026-10-06_9185c7bd665bad62308c52dca2fd219e_amadey_elex_karagany_rhadamanthys_smoke-loader_stealc_tofsee.exe
- Size 11.0MB
- Sample261007-3d6rways2m
- SHA256 80fb7483d4f567a0506eeddcfa1005dcd863fc1b21af7ead1664aac7c7d7c713
Malware Config
Extracted
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tofsee
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niflheimr.cn
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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.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Creates new service(s) 2 TTPs
- Deletes itself 1 TTPs 1 IoCs
- Executes dropped EXE 1 IoCs
- Drops file in System32 directory 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.
- 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
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C:\Users\Admin\AppData\Local\Temp\2026-10-06_9185c7bd665bad62308c52dca2fd219e_amadey_elex_karagany_rhadamanthys_smoke-loader_stealc_tofsee.exe"C:\Users\Admin\AppData\Local\Temp\2026-10-06_9185c7bd665bad62308c52dca2fd219e_amadey_elex_karagany_rhadamanthys_smoke-loader_stealc_tofsee.exe"1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\bbeqvawq\2⤵
- Executes a command shell one-liner
- System Location Discovery: System Language Discovery
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\mvcqwybf.exe" C:\Windows\SysWOW64\bbeqvawq\2⤵
- Executes a command shell one-liner
- System Location Discovery: System Language Discovery
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C:\Windows\SysWOW64\sc.exe"C:\Windows\System32\sc.exe" create bbeqvawq binPath= "C:\Windows\SysWOW64\bbeqvawq\mvcqwybf.exe /d\"C:\Users\Admin\AppData\Local\Temp\2026-10-06_9185c7bd665bad62308c52dca2fd219e_amadey_elex_karagany_rhadamanthys_smoke-loader_stealc_tofsee.exe\"" type= own start= auto DisplayName= "wifi support"2⤵
- Launches sc.exe
- System Location Discovery: System Language Discovery
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C:\Windows\SysWOW64\sc.exe"C:\Windows\System32\sc.exe" description bbeqvawq "wifi internet conection"2⤵
- Launches sc.exe
- System Location Discovery: System Language Discovery
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C:\Windows\SysWOW64\sc.exe"C:\Windows\System32\sc.exe" start bbeqvawq2⤵
- Launches sc.exe
- System Location Discovery: System Language Discovery
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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>nul2⤵
- Modifies Windows Firewall
- Event Triggered Execution: Netsh Helper DLL
- System Location Discovery: System Language Discovery
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2068 -s 10362⤵
- Program crash
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C:\Windows\SysWOW64\bbeqvawq\mvcqwybf.exeC:\Windows\SysWOW64\bbeqvawq\mvcqwybf.exe /d"C:\Users\Admin\AppData\Local\Temp\2026-10-06_9185c7bd665bad62308c52dca2fd219e_amadey_elex_karagany_rhadamanthys_smoke-loader_stealc_tofsee.exe"1⤵
- Executes dropped EXE
- Drops file in System32 directory
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\svchost.exesvchost.exe2⤵
- Sets service image path in registry
- Deletes itself
- System Location Discovery: System Language Discovery
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2332 -s 3922⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 2068 -ip 20681⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 2332 -ip 23321⤵
Network
MITRE ATT&CK Enterprise v16
Execution
Command and Scripting Interpreter
1Windows Command Shell
1System Services
1Service Execution
1Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Create or Modify System Process
3Windows Service
3Event Triggered Execution
1Netsh Helper DLL
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Create or Modify System Process
3Windows Service
3Event Triggered Execution
1Netsh Helper DLL
1Defense Evasion
Impair Defenses
1Disable or Modify System Firewall
1Indicator Removal
1File Deletion
1Modify Registry
1Replay Monitor
Loading Replay Monitor...
Downloads
mvcqwybf.exe
memory/732-11-0x0000000000EB0000-0x0000000000EC5000-memory.dmp
memory/732-13-0x0000000000EB0000-0x0000000000EC5000-memory.dmp
memory/732-14-0x0000000000EB0000-0x0000000000EC5000-memory.dmp
memory/2068-1-0x00000000006C0000-0x00000000007C0000-memory.dmp
memory/2068-2-0x0000000000510000-0x0000000000523000-memory.dmp
memory/2068-7-0x0000000000400000-0x0000000000486000-memory.dmp
memory/2068-8-0x0000000000510000-0x0000000000523000-memory.dmp
memory/2332-10-0x0000000000860000-0x0000000000960000-memory.dmp
memory/2332-15-0x0000000000400000-0x0000000000486000-memory.dmp