tofsee | 4f121a0eceb39bd5686fb153d460413c5f8f8360ad0c762278f61bbcca867df4

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20260513-en
resource tags

arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
10/08/2026, 22:50

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General

Target
2026-08-10_25b0928247351dc727e4e0cae20ef276_amadey_elex_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe
Size 13.6MB
Sample260810-2skbraba87
SHA256 4f121a0eceb39bd5686fb153d460413c5f8f8360ad0c762278f61bbcca867df4
MD5 25b0928247351dc727e4e0cae20ef276
SHA1 a952661508342958174920af30839f041fc6557b
SHA512 c6e7ad196540b4d4ea7ca6a61d85720340c3e1783ba1749a01a3eebe592a87940e6a19cca5180ce5ff6201879f86a83b00d161dcba0c6e598d6bc0a2a4c859ef
SSDEEP 393216:1EaDRfgRfgRfgRfgRfgRfgRfgRfgRfgRfgRfgRfgRfgRfgRfgRfgRfgRfgRfgRf9:1EaDRfgRfgRfgRfgRfgRfgRfgRfgRfgX
TLSH
T186E6786EFA4903F301C1037A674E94C7BB0AD8B9636B56F0246D844F6267E2CA377791
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

defense_evasion discovery execution tofsee persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

vanaheim.cn
jotunheim.name

Signatures

Family: Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee

Modifies Windows Firewall 2 TTPs 1 IoCs

defense_evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
2496	netsh.exe

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.

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Windows Service

T1543.003

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\kklffamd\ImagePath = "C:\\Windows\\SysWOW64\\kklffamd\\siifrdtr.exe"	svchost.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1074038928-2032447174-945360078-1000\Control Panel\International\Geo\Nation	2026-08-10_25b0928247351dc727e4e0cae20ef276_amadey_elex_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe

Creates new service(s) 2 TTPs
persistence execution

Windows Service
T1543.003

Service Execution
T1569.002

Deletes itself 1 IoCs

pid	Process
3916	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4564	siifrdtr.exe

Stops running service(s) 4 TTPs
defense_evasion execution

Windows Service
T1543.003

Impair Defenses
T1562

Service Stop
T1489

Service Execution
T1569.002

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4564 set thread context of 3916	4564	siifrdtr.exe	111

Launches sc.exe 3 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
3516	sc.exe
2128	sc.exe
3000	sc.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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.

persistence privilege_escalation

Netsh Helper DLL

T1546.007

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

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.

execution

Windows Command Shell

T1059.003

pid	Process
4184	cmd.exe
2440	cmd.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
3556	4420	WerFault.exe	86
2464	4564	WerFault.exe	108

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.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	siifrdtr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-10_25b0928247351dc727e4e0cae20ef276_amadey_elex_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4420 wrote to memory of 4184	4420	2026-08-10_25b0928247351dc727e4e0cae20ef276_amadey_elex_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe	91
PID 4420 wrote to memory of 2440	4420	2026-08-10_25b0928247351dc727e4e0cae20ef276_amadey_elex_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe	93
PID 4420 wrote to memory of 3000	4420	2026-08-10_25b0928247351dc727e4e0cae20ef276_amadey_elex_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe	96
PID 4420 wrote to memory of 3516	4420	2026-08-10_25b0928247351dc727e4e0cae20ef276_amadey_elex_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe	98
PID 4420 wrote to memory of 2128	4420	2026-08-10_25b0928247351dc727e4e0cae20ef276_amadey_elex_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe	101
PID 4420 wrote to memory of 2496	4420	2026-08-10_25b0928247351dc727e4e0cae20ef276_amadey_elex_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe	103
PID 4564 wrote to memory of 3916	4564	siifrdtr.exe	111
PID 4564 wrote to memory of 3916	4564	siifrdtr.exe	111

C:\Users\Admin\AppData\Local\Temp\2026-08-10_25b0928247351dc727e4e0cae20ef276_amadey_elex_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-10_25b0928247351dc727e4e0cae20ef276_amadey_elex_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4420
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\kklffamd\
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  PID:4184
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\siifrdtr.exe" C:\Windows\SysWOW64\kklffamd\
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  PID:2440
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create kklffamd binPath= "C:\Windows\SysWOW64\kklffamd\siifrdtr.exe /d\"C:\Users\Admin\AppData\Local\Temp\2026-08-10_25b0928247351dc727e4e0cae20ef276_amadey_elex_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:3000
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description kklffamd "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3516
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start kklffamd
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2128
- 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:2496
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4420 -s 1028
  2⤵
  - Program crash
  PID:3556

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4420 -ip 4420
1⤵
PID:4040

C:\Windows\SysWOW64\kklffamd\siifrdtr.exe
C:\Windows\SysWOW64\kklffamd\siifrdtr.exe /d"C:\Users\Admin\AppData\Local\Temp\2026-08-10_25b0928247351dc727e4e0cae20ef276_amadey_elex_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:4564
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:3916
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4564 -s 508
  2⤵
  - Program crash
  PID:2464

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 4564 -ip 4564
1⤵
PID:2136

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Windows Command Shell

T1059.003

System Services

T1569

Service Execution

T1569.002

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Service Stop

T1489

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Downloads

siifrdtr.exe

Path C:\Users\Admin\AppData\Local\Temp\siifrdtr.exe
Size 12.1MB
SHA256 ee79bb1192428b59b9b3e9e80494d2940d611a9f7c89ee9418468bc9499513c7
MD5 5d1da7f7b2d2597e09be3197ae3699ef
SHA1 3dead126d0e63c3afb471fa66770dee99b4dd194
SHA512 67782744567047c48073a2f2a6634f625c2308941968232b5c8c1683a0b8bb8b2b2fce9bd47b4b24ba887dc708ef662aaee0e5594373c3be7451d920919d1bd6
SSDEEP 393216:wEaDRfgRfgRfgRfgRfgRfgRfgRfgRfgRfgRfgRfgRfgRfgRfgRfgRfgRfgRfgRf5:wEaDRfgRfgRfgRfgRfgRfgRfgRfgRfgz
TLSH
T165D6786EFA4903F301C1037A674E94C7BB0AD8B9636B56F0246D844F6267E2CA377791
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/3916-13-0x0000000000440000-0x0000000000455000-memory.dmp

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memory/3916-15-0x0000000000440000-0x0000000000455000-memory.dmp

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memory/3916-16-0x0000000000440000-0x0000000000455000-memory.dmp

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memory/4420-0-0x0000000000400000-0x000000000229F000-memory.dmp

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memory/4420-2-0x00000000023C0000-0x00000000024C0000-memory.dmp

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memory/4420-3-0x00000000022D0000-0x00000000022E3000-memory.dmp

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memory/4420-5-0x0000000000400000-0x000000000229F000-memory.dmp

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memory/4420-9-0x00000000022D0000-0x00000000022E3000-memory.dmp

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memory/4420-11-0x0000000000400000-0x000000000229F000-memory.dmp

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memory/4564-10-0x0000000000400000-0x000000000229F000-memory.dmp

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memory/4564-18-0x0000000000400000-0x000000000229F000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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