tofsee | 51664dbc4aba91f2f3b5771993a16e26c818987b421b42b06053aab5fda7f4d1

Analysis

max time kernel
149s
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
15/08/2026, 05:15

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General

Target
2026-08-15_dab905d50792311a0111795b854b5d6e_amadey_elex_rhadamanthys_smoke-loader_stealc.exe
Size 11.3MB
Sample260815-fxrezadh88
SHA256 51664dbc4aba91f2f3b5771993a16e26c818987b421b42b06053aab5fda7f4d1
MD5 dab905d50792311a0111795b854b5d6e
SHA1 4f4f1aa49d88871f18f0c6e6dd6af937360883f6
SHA512 6d35f5b1ace7d50d315c6db5f4232b02bfda1d30e39bea6a94a5ffe48e6f879e50333f255e2474cac2ea186e11609df720bbe51de5094891e1022f035ebc9e0e
SSDEEP 3072:nurXX+PBiSWHn9SBwcA/Z80HN1TFEGP8HOfwjQ6bdFor3Yz+HKa13jjjjjjjjjjH:EXVSOn9SBKh/TFEGBfw9vo7FHKa
TLSH
T128C6EA617BF2A045F7FBCA3666314958AB37FC6BF96AC31F20448A5B1C21681CD46B13
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
1680	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\abcfktgz\ImagePath = "C:\\Windows\\SysWOW64\\abcfktgz\\yfidcwwq.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	2026-08-15_dab905d50792311a0111795b854b5d6e_amadey_elex_rhadamanthys_smoke-loader_stealc.exe

Creates new service(s) 2 TTPs
persistence execution

Windows Service
T1543.003

Service Execution
T1569.002

Deletes itself 1 IoCs

pid	Process
4508	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2740	yfidcwwq.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2740 set thread context of 4508	2740	yfidcwwq.exe	101

Launches sc.exe 3 IoCs

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

pid	Process
3348	sc.exe
3372	sc.exe
1640	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
1504	cmd.exe
4736	cmd.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
2820	4236	WerFault.exe	85
1036	2740	WerFault.exe	97

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	2026-08-15_dab905d50792311a0111795b854b5d6e_amadey_elex_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	yfidcwwq.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.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

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4236 wrote to memory of 1504	4236	2026-08-15_dab905d50792311a0111795b854b5d6e_amadey_elex_rhadamanthys_smoke-loader_stealc.exe	86
PID 4236 wrote to memory of 4736	4236	2026-08-15_dab905d50792311a0111795b854b5d6e_amadey_elex_rhadamanthys_smoke-loader_stealc.exe	88
PID 4236 wrote to memory of 1640	4236	2026-08-15_dab905d50792311a0111795b854b5d6e_amadey_elex_rhadamanthys_smoke-loader_stealc.exe	90
PID 4236 wrote to memory of 3348	4236	2026-08-15_dab905d50792311a0111795b854b5d6e_amadey_elex_rhadamanthys_smoke-loader_stealc.exe	93
PID 4236 wrote to memory of 3372	4236	2026-08-15_dab905d50792311a0111795b854b5d6e_amadey_elex_rhadamanthys_smoke-loader_stealc.exe	95
PID 4236 wrote to memory of 1680	4236	2026-08-15_dab905d50792311a0111795b854b5d6e_amadey_elex_rhadamanthys_smoke-loader_stealc.exe	98
PID 2740 wrote to memory of 4508	2740	yfidcwwq.exe	101
PID 2740 wrote to memory of 4508	2740	yfidcwwq.exe	101

C:\Users\Admin\AppData\Local\Temp\2026-08-15_dab905d50792311a0111795b854b5d6e_amadey_elex_rhadamanthys_smoke-loader_stealc.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-15_dab905d50792311a0111795b854b5d6e_amadey_elex_rhadamanthys_smoke-loader_stealc.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4236
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\abcfktgz\
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  PID:1504
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\yfidcwwq.exe" C:\Windows\SysWOW64\abcfktgz\
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  PID:4736
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create abcfktgz binPath= "C:\Windows\SysWOW64\abcfktgz\yfidcwwq.exe /d\"C:\Users\Admin\AppData\Local\Temp\2026-08-15_dab905d50792311a0111795b854b5d6e_amadey_elex_rhadamanthys_smoke-loader_stealc.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1640
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description abcfktgz "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3348
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start abcfktgz
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3372
- 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:1680
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4236 -s 1316
  2⤵
  - Program crash
  PID:2820

C:\Windows\SysWOW64\abcfktgz\yfidcwwq.exe
C:\Windows\SysWOW64\abcfktgz\yfidcwwq.exe /d"C:\Users\Admin\AppData\Local\Temp\2026-08-15_dab905d50792311a0111795b854b5d6e_amadey_elex_rhadamanthys_smoke-loader_stealc.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2740
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4508
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2740 -s 512
  2⤵
  - Program crash
  PID:1036

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4236 -ip 4236
1⤵
PID:2712

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 2740 -ip 2740
1⤵
PID:3708

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

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Downloads

yfidcwwq.exe

Path C:\Users\Admin\AppData\Local\Temp\yfidcwwq.exe
Size 13.9MB
SHA256 37376261d558dd8f0d9d25153ffec5ffbc6f3252b0e8acfc76d4659df87dcc7a
MD5 47042666d3c96766ff2fcb9f0befe15d
SHA1 c19a1b6e1335774e36299af36776efba296f44ea
SHA512 868a9fdefd6b74984682b11d2c5343eb50bd2ce38b508d24bab83f75937f2fed18903a970edcd619ab757175d050c639a538416e2580c918c0db36edb78a2677
SSDEEP 3072:lurXX+PBiSWHn9SBwcA/Z80HN1TFEGP8HOfwjQ6bdFor3Yz+HKa13jjjjjjjjjj/:KXVSOn9SBKh/TFEGBfw9vo7FHKa
TLSH
T16FE6EA617BF2A045F7FBCA3666314958AB37FC6BF96AC31F20448A5B1C21681CD46B13
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/2740-7-0x0000000000A90000-0x0000000000B90000-memory.dmp

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memory/2740-8-0x0000000000860000-0x0000000000873000-memory.dmp

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memory/2740-13-0x0000000000400000-0x000000000070F000-memory.dmp

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memory/4236-2-0x0000000000880000-0x0000000000893000-memory.dmp

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memory/4236-1-0x0000000000770000-0x0000000000870000-memory.dmp

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memory/4236-14-0x0000000000400000-0x000000000070F000-memory.dmp

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memory/4508-12-0x0000000000F80000-0x0000000000F95000-memory.dmp

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memory/4508-9-0x0000000000F80000-0x0000000000F95000-memory.dmp

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memory/4508-15-0x0000000000F80000-0x0000000000F95000-memory.dmp

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memory/4508-16-0x0000000000F80000-0x0000000000F95000-memory.dmp

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memory/4508-17-0x0000000000F80000-0x0000000000F95000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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