tofsee | 7fb5ade0f5814c8f03cadecbf0e38ec7f1c915114ef681f808f6ce69282138b7

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20260911-en
resource tags

arch:x64arch:x86image:win10v2004-20260911-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
02/11/2026, 11:22

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General

Target
2026-11-01_b280e92d29e7c8974e182538add3feb5_amadey_elex_rhadamanthys_smoke-loader_stealc_tofsee.exe
Size 14.9MB
Sample261102-ngm2lsbv2p
SHA256 7fb5ade0f5814c8f03cadecbf0e38ec7f1c915114ef681f808f6ce69282138b7
MD5 b280e92d29e7c8974e182538add3feb5
SHA1 a5104672ec95c9990afa884661f7e7c38ab1168c
SHA512 06f8867458bc1fa8dfe394e800fd7403de8ea1888e5d2cc70f2046674b1553f2e9540ffbd7b4b6ff8d33d4b63ab06eebdb7f528185f83e61b1ee92ff881ede17
SSDEEP 393216:qdvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvn:qd
TLSH
T123F61851A3E45D1AFAF35A7048769AC41A3BFCA37B30823E12503ACE1D7E791AD41763
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

defense_evasion discovery execution tofsee persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

quadoil.ru
lakeflex.ru

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
5832	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\udkjvjzh\ImagePath = "C:\\Windows\\SysWOW64\\udkjvjzh\\fymyqkmz.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-1-5-21-2091445952-3649787497-104050984-1000\Control Panel\International\Geo\Nation	2026-11-01_b280e92d29e7c8974e182538add3feb5_amadey_elex_rhadamanthys_smoke-loader_stealc_tofsee.exe

Creates new service(s) 2 TTPs
persistence execution

Windows Service
T1543.003

Service Execution
T1569.002

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
3360	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4932	fymyqkmz.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4932 set thread context of 3360	4932	fymyqkmz.exe	102

Launches sc.exe 3 IoCs

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

pid	Process
5200	sc.exe
2392	sc.exe
3792	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
2876	cmd.exe
5924	cmd.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
5372	4768	WerFault.exe	84
3504	4932	WerFault.exe	96

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	sc.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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fymyqkmz.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-11-01_b280e92d29e7c8974e182538add3feb5_amadey_elex_rhadamanthys_smoke-loader_stealc_tofsee.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4768 wrote to memory of 2876	4768	2026-11-01_b280e92d29e7c8974e182538add3feb5_amadey_elex_rhadamanthys_smoke-loader_stealc_tofsee.exe	85
PID 4768 wrote to memory of 5924	4768	2026-11-01_b280e92d29e7c8974e182538add3feb5_amadey_elex_rhadamanthys_smoke-loader_stealc_tofsee.exe	87
PID 4768 wrote to memory of 5200	4768	2026-11-01_b280e92d29e7c8974e182538add3feb5_amadey_elex_rhadamanthys_smoke-loader_stealc_tofsee.exe	89
PID 4768 wrote to memory of 2392	4768	2026-11-01_b280e92d29e7c8974e182538add3feb5_amadey_elex_rhadamanthys_smoke-loader_stealc_tofsee.exe	91
PID 4768 wrote to memory of 3792	4768	2026-11-01_b280e92d29e7c8974e182538add3feb5_amadey_elex_rhadamanthys_smoke-loader_stealc_tofsee.exe	94
PID 4768 wrote to memory of 5832	4768	2026-11-01_b280e92d29e7c8974e182538add3feb5_amadey_elex_rhadamanthys_smoke-loader_stealc_tofsee.exe	97
PID 4932 wrote to memory of 3360	4932	fymyqkmz.exe	102
PID 4932 wrote to memory of 3360	4932	fymyqkmz.exe	102

C:\Users\Admin\AppData\Local\Temp\2026-11-01_b280e92d29e7c8974e182538add3feb5_amadey_elex_rhadamanthys_smoke-loader_stealc_tofsee.exe
"C:\Users\Admin\AppData\Local\Temp\2026-11-01_b280e92d29e7c8974e182538add3feb5_amadey_elex_rhadamanthys_smoke-loader_stealc_tofsee.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4768
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\udkjvjzh\
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  PID:2876
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\fymyqkmz.exe" C:\Windows\SysWOW64\udkjvjzh\
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  PID:5924
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create udkjvjzh binPath= "C:\Windows\SysWOW64\udkjvjzh\fymyqkmz.exe /d\"C:\Users\Admin\AppData\Local\Temp\2026-11-01_b280e92d29e7c8974e182538add3feb5_amadey_elex_rhadamanthys_smoke-loader_stealc_tofsee.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:5200
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description udkjvjzh "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2392
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start udkjvjzh
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3792
- 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:5832
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4768 -s 888
  2⤵
  - Program crash
  PID:5372

C:\Windows\SysWOW64\udkjvjzh\fymyqkmz.exe
C:\Windows\SysWOW64\udkjvjzh\fymyqkmz.exe /d"C:\Users\Admin\AppData\Local\Temp\2026-11-01_b280e92d29e7c8974e182538add3feb5_amadey_elex_rhadamanthys_smoke-loader_stealc_tofsee.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4932
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:3360
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4932 -s 572
  2⤵
  - Program crash
  PID:3504

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 4768 -ip 4768
1⤵
PID:4164

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 556 -p 4932 -ip 4932
1⤵
PID:3160

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

Indicator Removal

T1070

File Deletion

T1070.004

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

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Downloads

fymyqkmz.exe

Path C:\Users\Admin\AppData\Local\Temp\fymyqkmz.exe
Size 14.5MB
SHA256 642f10e1f0c59e023766d38f1e0f1df6576e4c9b4c214b88369cd2c00cad5e2a
MD5 6ee40c3a34e1167d710e4aa9605d73b5
SHA1 84349a6ee038e01a500ea43b4ef9cedf8b264aaa
SHA512 875d570b0b20bd65dd77323d22c301fde5b77c43973231d03574048e042ff17722496edec544d41eb4b7599a2e2f75fbdd6cbf6271138d5b624407dc0d296883
SSDEEP 393216:wdvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvP:wR
TLSH
T1FDE61851A3E45D1AFAF35A7048769AC41A3BFCA37B30823E12503ACE1D7E791AD41763
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/3360-15-0x00000000005D0000-0x00000000005E5000-memory.dmp

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memory/3360-17-0x00000000005D0000-0x00000000005E5000-memory.dmp

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memory/3360-11-0x00000000005D0000-0x00000000005E5000-memory.dmp

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memory/3360-8-0x00000000005D0000-0x00000000005E5000-memory.dmp

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memory/3360-16-0x00000000005D0000-0x00000000005E5000-memory.dmp

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memory/4768-1-0x00000000004D0000-0x00000000004E3000-memory.dmp

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memory/4768-0-0x00000000004C0000-0x00000000004CD000-memory.dmp

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memory/4768-13-0x00000000004D0000-0x00000000004E3000-memory.dmp

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memory/4768-12-0x0000000000400000-0x0000000000436000-memory.dmp

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memory/4932-7-0x0000000000C30000-0x0000000000C43000-memory.dmp

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memory/4932-14-0x0000000000400000-0x0000000000436000-memory.dmp

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memory/4932-6-0x00000000004C0000-0x00000000004CD000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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