tofsee | 35bc3d4b58223b892a1e97468a1a201d70313fb8eb0493fd8dc84d4676220b57

General

Target

2025-03-30_1af7c14f03c0f97e84866762d3975796_amadey_smoke-loader.exe
Size

10.6MB
MD5

1af7c14f03c0f97e84866762d3975796
SHA1

7049d730600dc4e28a8859e835d701e365d0e83a
SHA256

35bc3d4b58223b892a1e97468a1a201d70313fb8eb0493fd8dc84d4676220b57
SHA512

07f3300958da25fbb02d2e51887fc0cf9b8b578d24cd4de1b6d524b2ad3380d91728dd16d618a2c19992753b2df795e77caf4b2fb59d3e9336ab33a053992324
SSDEEP

6144:T7aBkOsUh6TFWAbjG+jTD7fksRUrz8KFxVsGEp:a3sUhfAvGETD7f2XhFDstp

Score

10^/10

tofsee defense_evasion discovery execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

43.231.4.7

lazystax.ru

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee
Tofsee family
tofsee
Creates new service(s) 2 TTPs
persistence execution

Windows Service
T1543.003

Service Execution
T1569.002

Modifies Windows Firewall 2 TTPs 1 IoCs

defense_evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
3352	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\ntsslfsj\ImagePath = "C:\\Windows\\SysWOW64\\ntsslfsj\\fbttqfes.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-1-5-21-3920955164-3782810283-1225622749-1000\Control Panel\International\Geo\Nation	2025-03-30_1af7c14f03c0f97e84866762d3975796_amadey_smoke-loader.exe

Deletes itself 1 IoCs

pid	Process
3960	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
5056	fbttqfes.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5056 set thread context of 3960	5056	fbttqfes.exe	101

Launches sc.exe 3 IoCs

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

pid	Process
4692	sc.exe
4948	sc.exe
2372	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 queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
5692	1296	WerFault.exe	84
3392	5056	WerFault.exe	100

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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2025-03-30_1af7c14f03c0f97e84866762d3975796_amadey_smoke-loader.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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fbttqfes.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1296 wrote to memory of 3528	1296	2025-03-30_1af7c14f03c0f97e84866762d3975796_amadey_smoke-loader.exe	88
PID 1296 wrote to memory of 3528	1296	2025-03-30_1af7c14f03c0f97e84866762d3975796_amadey_smoke-loader.exe	88
PID 1296 wrote to memory of 3528	1296	2025-03-30_1af7c14f03c0f97e84866762d3975796_amadey_smoke-loader.exe	88
PID 1296 wrote to memory of 4608	1296	2025-03-30_1af7c14f03c0f97e84866762d3975796_amadey_smoke-loader.exe	90
PID 1296 wrote to memory of 4608	1296	2025-03-30_1af7c14f03c0f97e84866762d3975796_amadey_smoke-loader.exe	90
PID 1296 wrote to memory of 4608	1296	2025-03-30_1af7c14f03c0f97e84866762d3975796_amadey_smoke-loader.exe	90
PID 1296 wrote to memory of 4692	1296	2025-03-30_1af7c14f03c0f97e84866762d3975796_amadey_smoke-loader.exe	92
PID 1296 wrote to memory of 4692	1296	2025-03-30_1af7c14f03c0f97e84866762d3975796_amadey_smoke-loader.exe	92
PID 1296 wrote to memory of 4692	1296	2025-03-30_1af7c14f03c0f97e84866762d3975796_amadey_smoke-loader.exe	92
PID 1296 wrote to memory of 4948	1296	2025-03-30_1af7c14f03c0f97e84866762d3975796_amadey_smoke-loader.exe	94
PID 1296 wrote to memory of 4948	1296	2025-03-30_1af7c14f03c0f97e84866762d3975796_amadey_smoke-loader.exe	94
PID 1296 wrote to memory of 4948	1296	2025-03-30_1af7c14f03c0f97e84866762d3975796_amadey_smoke-loader.exe	94
PID 1296 wrote to memory of 2372	1296	2025-03-30_1af7c14f03c0f97e84866762d3975796_amadey_smoke-loader.exe	96
PID 1296 wrote to memory of 2372	1296	2025-03-30_1af7c14f03c0f97e84866762d3975796_amadey_smoke-loader.exe	96
PID 1296 wrote to memory of 2372	1296	2025-03-30_1af7c14f03c0f97e84866762d3975796_amadey_smoke-loader.exe	96
PID 5056 wrote to memory of 3960	5056	fbttqfes.exe	101
PID 5056 wrote to memory of 3960	5056	fbttqfes.exe	101
PID 5056 wrote to memory of 3960	5056	fbttqfes.exe	101
PID 5056 wrote to memory of 3960	5056	fbttqfes.exe	101
PID 5056 wrote to memory of 3960	5056	fbttqfes.exe	101
PID 1296 wrote to memory of 3352	1296	2025-03-30_1af7c14f03c0f97e84866762d3975796_amadey_smoke-loader.exe	104
PID 1296 wrote to memory of 3352	1296	2025-03-30_1af7c14f03c0f97e84866762d3975796_amadey_smoke-loader.exe	104
PID 1296 wrote to memory of 3352	1296	2025-03-30_1af7c14f03c0f97e84866762d3975796_amadey_smoke-loader.exe	104

C:\Users\Admin\AppData\Local\Temp\2025-03-30_1af7c14f03c0f97e84866762d3975796_amadey_smoke-loader.exe
"C:\Users\Admin\AppData\Local\Temp\2025-03-30_1af7c14f03c0f97e84866762d3975796_amadey_smoke-loader.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1296
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ntsslfsj\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3528
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\fbttqfes.exe" C:\Windows\SysWOW64\ntsslfsj\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4608
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create ntsslfsj binPath= "C:\Windows\SysWOW64\ntsslfsj\fbttqfes.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-03-30_1af7c14f03c0f97e84866762d3975796_amadey_smoke-loader.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4692
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description ntsslfsj "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4948
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start ntsslfsj
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2372
- 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:3352
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1296 -s 1208
  2⤵
  - Program crash
  PID:5692

C:\Windows\SysWOW64\ntsslfsj\fbttqfes.exe
C:\Windows\SysWOW64\ntsslfsj\fbttqfes.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-03-30_1af7c14f03c0f97e84866762d3975796_amadey_smoke-loader.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5056
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:3960
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5056 -s 512
  2⤵
  - Program crash
  PID:3392

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 5056 -ip 5056
1⤵
PID:1824

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 492 -p 1296 -ip 1296
1⤵
PID:448

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

1

T1569

Service Execution

1

T1569.002

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Defense Evasion

Impair Defenses

1

T1562

Disable or Modify System Firewall

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\fbttqfes.exe

Filesize
12.4MB

MD5
39cd18ea792985f9dbcdc5622f4136df

SHA1
f38645e8669d98b563f9eca798e6fe93435c4160

SHA256
f4e06803fdbc7667a2af91c4333ff70ceb77689c9cc9d4f488e9f3bee5129003

SHA512
fbb4a130c4953185fc43a9d385c680f9dec3d7d3352644ef286c9513aa812f7d0fd2691fd9d1622f62e2d13fab915e187bb6c1808669c3c5a167c398834d683d

Download Submit
memory/1296-17-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1296-1-0x0000000000590000-0x0000000000690000-memory.dmp

Filesize
1024KB

Download
memory/1296-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/1296-15-0x0000000000400000-0x000000000045D000-memory.dmp

Filesize
372KB

Download
memory/1296-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1296-16-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/3960-10-0x0000000000190000-0x00000000001A5000-memory.dmp

Filesize
84KB

Download
memory/3960-13-0x0000000000190000-0x00000000001A5000-memory.dmp

Filesize
84KB

Download
memory/3960-18-0x0000000000190000-0x00000000001A5000-memory.dmp

Filesize
84KB

Download
memory/3960-19-0x0000000000190000-0x00000000001A5000-memory.dmp

Filesize
84KB

Download
memory/3960-20-0x0000000000190000-0x00000000001A5000-memory.dmp

Filesize
84KB

Download
memory/5056-14-0x0000000000400000-0x000000000045D000-memory.dmp

Filesize
372KB

Download
memory/5056-9-0x0000000000400000-0x000000000045D000-memory.dmp

Filesize
372KB

Download
memory/5056-8-0x0000000000400000-0x000000000045D000-memory.dmp

Filesize
372KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads