tofsee | 9118fbb4016bc67be1620c73a0b14744e5d276880937279f5bfc98e2ed55baf7

Analysis

max time kernel
149s
max time network
143s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
16/04/2026, 03:58

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General

Target
2026-04-16_c05b904978fc2784a5e1a680bec0b76d_amadey_elex_njrat_remcos_rhadamanthys_smoke-loader_stealc.exe
Size 13.5MB
Sample260416-ejgg6sfs4j
SHA256 9118fbb4016bc67be1620c73a0b14744e5d276880937279f5bfc98e2ed55baf7
MD5 c05b904978fc2784a5e1a680bec0b76d
SHA1 87abc62125d7ad63bca596735782a397d615355a
SHA512 31dbcdb7c4732f6b155b2a4fe5443234ae52577151054b0a1af1a19be4c7e7ac1fa26512851d65024b640e2573069cfd97102c5c428406b51df7ef5f11367da5
SSDEEP 6144:GIzw8mFAdhAtKlQXRbeoVp59Sqer5+nDFoGCCCCCCCCCCCCCCCCCCCCCCCCCCCCH:hEidhAglQhyupLer5+nZo
TLSH
T115E6851541F80D57DA66BE34757F1B1FCCE9140A702EB7092094F1AEFAB9993C82A372
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
2392	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\flpmdvxt\ImagePath = "C:\\Windows\\SysWOW64\\flpmdvxt\\ipwzocvf.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
428	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1064	ipwzocvf.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1064 set thread context of 428	1064	ipwzocvf.exe	92

Launches sc.exe 3 IoCs

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

pid	Process
1736	sc.exe
3172	sc.exe
4724	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

Program crash 2 IoCs

pid	pid_target	Process	procid_target
2224	3652	WerFault.exe	79
5104	1064	WerFault.exe	91

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	ipwzocvf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-04-16_c05b904978fc2784a5e1a680bec0b76d_amadey_elex_njrat_remcos_rhadamanthys_smoke-loader_stealc.exe
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	svchost.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3652 wrote to memory of 772	3652	2026-04-16_c05b904978fc2784a5e1a680bec0b76d_amadey_elex_njrat_remcos_rhadamanthys_smoke-loader_stealc.exe	80
PID 3652 wrote to memory of 4476	3652	2026-04-16_c05b904978fc2784a5e1a680bec0b76d_amadey_elex_njrat_remcos_rhadamanthys_smoke-loader_stealc.exe	82
PID 3652 wrote to memory of 1736	3652	2026-04-16_c05b904978fc2784a5e1a680bec0b76d_amadey_elex_njrat_remcos_rhadamanthys_smoke-loader_stealc.exe	84
PID 3652 wrote to memory of 3172	3652	2026-04-16_c05b904978fc2784a5e1a680bec0b76d_amadey_elex_njrat_remcos_rhadamanthys_smoke-loader_stealc.exe	87
PID 3652 wrote to memory of 4724	3652	2026-04-16_c05b904978fc2784a5e1a680bec0b76d_amadey_elex_njrat_remcos_rhadamanthys_smoke-loader_stealc.exe	89
PID 1064 wrote to memory of 428	1064	ipwzocvf.exe	92
PID 1064 wrote to memory of 428	1064	ipwzocvf.exe	92
PID 3652 wrote to memory of 2392	3652	2026-04-16_c05b904978fc2784a5e1a680bec0b76d_amadey_elex_njrat_remcos_rhadamanthys_smoke-loader_stealc.exe	94

C:\Users\Admin\AppData\Local\Temp\2026-04-16_c05b904978fc2784a5e1a680bec0b76d_amadey_elex_njrat_remcos_rhadamanthys_smoke-loader_stealc.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-16_c05b904978fc2784a5e1a680bec0b76d_amadey_elex_njrat_remcos_rhadamanthys_smoke-loader_stealc.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3652
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\flpmdvxt\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:772
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ipwzocvf.exe" C:\Windows\SysWOW64\flpmdvxt\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4476
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create flpmdvxt binPath= "C:\Windows\SysWOW64\flpmdvxt\ipwzocvf.exe /d\"C:\Users\Admin\AppData\Local\Temp\2026-04-16_c05b904978fc2784a5e1a680bec0b76d_amadey_elex_njrat_remcos_rhadamanthys_smoke-loader_stealc.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1736
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description flpmdvxt "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3172
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start flpmdvxt
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4724
- 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:2392
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3652 -s 1312
  2⤵
  - Program crash
  PID:2224

C:\Windows\SysWOW64\flpmdvxt\ipwzocvf.exe
C:\Windows\SysWOW64\flpmdvxt\ipwzocvf.exe /d"C:\Users\Admin\AppData\Local\Temp\2026-04-16_c05b904978fc2784a5e1a680bec0b76d_amadey_elex_njrat_remcos_rhadamanthys_smoke-loader_stealc.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1064
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:428
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1064 -s 544
  2⤵
  - Program crash
  PID:5104

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 1064 -ip 1064
1⤵
PID:3708

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 3652 -ip 3652
1⤵
PID:4108

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

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

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

ipwzocvf.exe

Path C:\Users\Admin\AppData\Local\Temp\ipwzocvf.exe
Size 14.0MB
SHA256 f7aaa0212109e9e528ed201fb135de1e4c1be1c5ea0767ac52628ea10bdb144c
MD5 0417b3dcfe50b1e010fb383bdf46c62e
SHA1 da0cf1af6ddfeab411854049a1c19f6d2df14fd8
SHA512 6b8a502afdbf9ab67d942038d4edde3fad6883a1097c2affa1c1bec9ae969a7bce04e3bb5185761cf8357425fbc356b6ecb0591c76c13926695e4e8662710c6f
SSDEEP 6144:OIzw8mFAdhAtKlQXRbeoVp59Sqer5+nDFoGCCCCCCCCCCCCCCCCCCCCCCCCCCCCC:ZEidhAglQhyupLer5+nZo
TLSH
T155E6851541F80D57DA66BE34757F1B1FCCE9140A702EB7092094F1AEFAB9993C82A372
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/428-7-0x0000000000D40000-0x0000000000D55000-memory.dmp

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memory/428-15-0x0000000000D40000-0x0000000000D55000-memory.dmp

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memory/428-16-0x0000000000D40000-0x0000000000D55000-memory.dmp

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memory/428-17-0x0000000001380000-0x00000000013FB000-memory.dmp

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memory/1064-11-0x0000000002B50000-0x0000000002BCB000-memory.dmp

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memory/2392-14-0x0000000003260000-0x00000000032C4000-memory.dmp

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memory/3652-1-0x00000000027D0000-0x00000000028D0000-memory.dmp

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memory/3652-2-0x00000000027A0000-0x00000000027B3000-memory.dmp

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memory/3652-13-0x00000000027A0000-0x00000000027B3000-memory.dmp

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memory/3652-12-0x0000000002720000-0x000000000279B000-memory.dmp

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Analysis

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General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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