tofsee | b6da0a9ac58cb3c5c484d8da12007dd9d39fde1a973739614714e3b6d3d8b54e

Analysis

max time kernel
149s
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
06/08/2026, 01:13

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General

Target
2026-08-06_c4dd1075267aaaa82244f6ae9e6e8498_amadey_elex_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe
Size 11.4MB
Sample260806-bk51dabl31
SHA256 b6da0a9ac58cb3c5c484d8da12007dd9d39fde1a973739614714e3b6d3d8b54e
MD5 c4dd1075267aaaa82244f6ae9e6e8498
SHA1 b2092d311902dd0de197266ce15c3396afbdb6cb
SHA512 79cacad8fe2a5f5a3e284e4c4ae71003fdb9feef145767f16a591d6b584ae65b548e6ccfcf0ae19f149b7c172d64ab29531fa9303e750dd0e73634f1fed67c3e
SSDEEP 196608:2EaDRfgRfgRfgRfgRfgRfgRfgRfgRfgRfgRfgRfgRfgRfgRfgRfgRfgRfgRfgRfM:2EaDRfgRfgRfgRfgRfgRfgRfgRfgRfgW
TLSH
T183C6786EFA4903F301C1037A674E94C7BB0AD8B9636B56F0246D844F6267E2CA377791
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

Windows security bypass 2 TTPs 1 IoCs

defense_evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\pjtgmc = "0"	svchost.exe

Modifies Windows Firewall 2 TTPs 1 IoCs

defense_evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
1920	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\pjtgmc\ImagePath = "C:\\Windows\\SysWOW64\\pjtgmc\\wiylzyqu.exe"	svchost.exe

Creates new service(s) 2 TTPs
persistence execution

Windows Service
T1543.003

Service Execution
T1569.002

Deletes itself 1 IoCs

pid	Process
4920	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3500	wiylzyqu.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 3500 set thread context of 4920	3500	wiylzyqu.exe	100

Launches sc.exe 3 IoCs

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

pid	Process
4288	sc.exe
3020	sc.exe
5200	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
2028	cmd.exe
2456	cmd.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
6124	3500	WerFault.exe	99
6120	6140	WerFault.exe	87

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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
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	wiylzyqu.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-06_c4dd1075267aaaa82244f6ae9e6e8498_amadey_elex_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 6140 wrote to memory of 2028	6140	2026-08-06_c4dd1075267aaaa82244f6ae9e6e8498_amadey_elex_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe	88
PID 6140 wrote to memory of 2456	6140	2026-08-06_c4dd1075267aaaa82244f6ae9e6e8498_amadey_elex_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe	90
PID 6140 wrote to memory of 4288	6140	2026-08-06_c4dd1075267aaaa82244f6ae9e6e8498_amadey_elex_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe	92
PID 6140 wrote to memory of 3020	6140	2026-08-06_c4dd1075267aaaa82244f6ae9e6e8498_amadey_elex_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe	94
PID 6140 wrote to memory of 5200	6140	2026-08-06_c4dd1075267aaaa82244f6ae9e6e8498_amadey_elex_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe	97
PID 3500 wrote to memory of 4920	3500	wiylzyqu.exe	100
PID 3500 wrote to memory of 4920	3500	wiylzyqu.exe	100
PID 6140 wrote to memory of 1920	6140	2026-08-06_c4dd1075267aaaa82244f6ae9e6e8498_amadey_elex_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe	104

C:\Users\Admin\AppData\Local\Temp\2026-08-06_c4dd1075267aaaa82244f6ae9e6e8498_amadey_elex_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-06_c4dd1075267aaaa82244f6ae9e6e8498_amadey_elex_rhadamanthys_smoke-loader_stealc_stop_tofsee.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:6140
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\pjtgmc\
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  PID:2028
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\wiylzyqu.exe" C:\Windows\SysWOW64\pjtgmc\
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  PID:2456
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create pjtgmc binPath= "C:\Windows\SysWOW64\pjtgmc\wiylzyqu.exe /d\"C:\Users\Admin\AppData\Local\Temp\2026-08-06_c4dd1075267aaaa82244f6ae9e6e8498_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:4288
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description pjtgmc "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3020
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start pjtgmc
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:5200
- 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:1920
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 6140 -s 944
  2⤵
  - Program crash
  PID:6120

C:\Windows\SysWOW64\pjtgmc\wiylzyqu.exe
C:\Windows\SysWOW64\pjtgmc\wiylzyqu.exe /d"C:\Users\Admin\AppData\Local\Temp\2026-08-06_c4dd1075267aaaa82244f6ae9e6e8498_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:3500
- 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:4920
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3500 -s 592
  2⤵
  - Program crash
  PID:6124

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 492 -p 3500 -ip 3500
1⤵
PID:4356

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 492 -p 6140 -ip 6140
1⤵
PID:5716

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

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

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

wiylzyqu.exe

Path C:\Users\Admin\AppData\Local\Temp\wiylzyqu.exe
Size 14.3MB
SHA256 37e0882f86837a56b14fb654cadb70c7eeb983755bf6fc9b9e6cd099df0dc2b2
MD5 add81d9e22d24b1a7618998d8b810169
SHA1 2d91060781ae4599f48b7e43a6b96e1f29b81a53
SHA512 7529659c0f87d11669d66d5e38d00c7eccf03de76b5345d971495053a63af3ac9eb0eb9e634015bc3d663511b4993172759fde5f0c2c47be95cb9f1a1768c001
SSDEEP 393216:5EaDRfgRfgRfgRfgRfgRfgRfgRfgRfgRfgRfgRfgRfgRfgRfgRfgRfgRfgRfgRfQ:5EaDRfgRfgRfgRfgRfgRfgRfgRfgRfg6
TLSH
T1A6E6786EFA4903F301C1037A674E94C7BB0AD8B9636B56F0246D844F6267E2CA377791
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/3500-7-0x0000000000400000-0x000000000229F000-memory.dmp

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memory/3500-11-0x0000000000400000-0x000000000229F000-memory.dmp

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memory/4920-9-0x0000000000640000-0x0000000000655000-memory.dmp

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memory/4920-14-0x0000000000640000-0x0000000000655000-memory.dmp

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memory/4920-15-0x0000000000640000-0x0000000000655000-memory.dmp

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memory/6140-0-0x0000000000400000-0x000000000229F000-memory.dmp

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memory/6140-2-0x0000000002510000-0x0000000002610000-memory.dmp

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memory/6140-3-0x0000000004020000-0x0000000004033000-memory.dmp

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memory/6140-12-0x0000000000400000-0x000000000229F000-memory.dmp

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memory/6140-13-0x0000000004020000-0x0000000004033000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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