tofsee | 8acfd8a5a4901ca5bf938fe131c5088aff69f00b9b2e2daeefdec896a9c95763

Analysis

max time kernel
144s
max time network
126s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
06-01-2025 19:42

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General

Target

JaffaCakes118_36da92091674ea2f46532a6cc29c86e5.exe
Size

11.0MB
MD5

36da92091674ea2f46532a6cc29c86e5
SHA1

db5804956ba8e333b975c1294bf953a9a0c692a4
SHA256

8acfd8a5a4901ca5bf938fe131c5088aff69f00b9b2e2daeefdec896a9c95763
SHA512

c5e00c3a48844a73e49201a52973cfb98e11d45aee4132225872519e2842e4b6bf3b662a7fad2b89adc1c784405a88e9986a8578764f85b3399e2ab699a2a6bc
SSDEEP

3072:qrLSAaIXFM9X/WWIyOEfEDQMZWecFKmZ:sNWktyH9V

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

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

Windows security bypass 2 TTPs 1 IoCs

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\cnrsrntx = "0"	svchost.exe

Creates new service(s) 2 TTPs
persistence execution

Windows Service
T1543.003

Service Execution
T1569.002

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
2772	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\cnrsrntx\ImagePath = "C:\\Windows\\SysWOW64\\cnrsrntx\\ikfwnhoh.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2832	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2568	ikfwnhoh.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2568 set thread context of 2832	2568	ikfwnhoh.exe	41

Launches sc.exe 3 IoCs

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

pid	Process
2508	sc.exe
1868	sc.exe
264	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

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	JaffaCakes118_36da92091674ea2f46532a6cc29c86e5.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
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	ikfwnhoh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2548 wrote to memory of 2156	2548	JaffaCakes118_36da92091674ea2f46532a6cc29c86e5.exe	30
PID 2548 wrote to memory of 2156	2548	JaffaCakes118_36da92091674ea2f46532a6cc29c86e5.exe	30
PID 2548 wrote to memory of 2156	2548	JaffaCakes118_36da92091674ea2f46532a6cc29c86e5.exe	30
PID 2548 wrote to memory of 2156	2548	JaffaCakes118_36da92091674ea2f46532a6cc29c86e5.exe	30
PID 2548 wrote to memory of 2404	2548	JaffaCakes118_36da92091674ea2f46532a6cc29c86e5.exe	32
PID 2548 wrote to memory of 2404	2548	JaffaCakes118_36da92091674ea2f46532a6cc29c86e5.exe	32
PID 2548 wrote to memory of 2404	2548	JaffaCakes118_36da92091674ea2f46532a6cc29c86e5.exe	32
PID 2548 wrote to memory of 2404	2548	JaffaCakes118_36da92091674ea2f46532a6cc29c86e5.exe	32
PID 2548 wrote to memory of 2508	2548	JaffaCakes118_36da92091674ea2f46532a6cc29c86e5.exe	34
PID 2548 wrote to memory of 2508	2548	JaffaCakes118_36da92091674ea2f46532a6cc29c86e5.exe	34
PID 2548 wrote to memory of 2508	2548	JaffaCakes118_36da92091674ea2f46532a6cc29c86e5.exe	34
PID 2548 wrote to memory of 2508	2548	JaffaCakes118_36da92091674ea2f46532a6cc29c86e5.exe	34
PID 2548 wrote to memory of 1868	2548	JaffaCakes118_36da92091674ea2f46532a6cc29c86e5.exe	36
PID 2548 wrote to memory of 1868	2548	JaffaCakes118_36da92091674ea2f46532a6cc29c86e5.exe	36
PID 2548 wrote to memory of 1868	2548	JaffaCakes118_36da92091674ea2f46532a6cc29c86e5.exe	36
PID 2548 wrote to memory of 1868	2548	JaffaCakes118_36da92091674ea2f46532a6cc29c86e5.exe	36
PID 2548 wrote to memory of 264	2548	JaffaCakes118_36da92091674ea2f46532a6cc29c86e5.exe	38
PID 2548 wrote to memory of 264	2548	JaffaCakes118_36da92091674ea2f46532a6cc29c86e5.exe	38
PID 2548 wrote to memory of 264	2548	JaffaCakes118_36da92091674ea2f46532a6cc29c86e5.exe	38
PID 2548 wrote to memory of 264	2548	JaffaCakes118_36da92091674ea2f46532a6cc29c86e5.exe	38
PID 2568 wrote to memory of 2832	2568	ikfwnhoh.exe	41
PID 2568 wrote to memory of 2832	2568	ikfwnhoh.exe	41
PID 2568 wrote to memory of 2832	2568	ikfwnhoh.exe	41
PID 2568 wrote to memory of 2832	2568	ikfwnhoh.exe	41
PID 2568 wrote to memory of 2832	2568	ikfwnhoh.exe	41
PID 2568 wrote to memory of 2832	2568	ikfwnhoh.exe	41
PID 2548 wrote to memory of 2772	2548	JaffaCakes118_36da92091674ea2f46532a6cc29c86e5.exe	42
PID 2548 wrote to memory of 2772	2548	JaffaCakes118_36da92091674ea2f46532a6cc29c86e5.exe	42
PID 2548 wrote to memory of 2772	2548	JaffaCakes118_36da92091674ea2f46532a6cc29c86e5.exe	42
PID 2548 wrote to memory of 2772	2548	JaffaCakes118_36da92091674ea2f46532a6cc29c86e5.exe	42

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_36da92091674ea2f46532a6cc29c86e5.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_36da92091674ea2f46532a6cc29c86e5.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2548
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\cnrsrntx\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2156
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ikfwnhoh.exe" C:\Windows\SysWOW64\cnrsrntx\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2404
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create cnrsrntx binPath= "C:\Windows\SysWOW64\cnrsrntx\ikfwnhoh.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_36da92091674ea2f46532a6cc29c86e5.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2508
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description cnrsrntx "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1868
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start cnrsrntx
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:264
- 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:2772

C:\Windows\SysWOW64\cnrsrntx\ikfwnhoh.exe
C:\Windows\SysWOW64\cnrsrntx\ikfwnhoh.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_36da92091674ea2f46532a6cc29c86e5.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2568
- 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:2832

Network

MITRE ATT&CK Enterprise v15

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

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

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Downloads

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

Filesize
12.4MB

MD5
0696b5935e91cd52cb66555b3d2b0b8c

SHA1
303f07c97bce50dbd2b7320755cb5623cb4bd6e2

SHA256
04f34e165ba624d00e9ec0c729484cca704c925caf2010fd2dff2e917a632e60

SHA512
9a38b1b0c5ff03ac548a3e7a3d73d7c210323a94d632f1610ae9e78baf337e0775097e4f36a628f20e7c0b3874abb0723874536931ab7d4d81c7d4f4018de153

Download Submit
memory/2548-12-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/2548-0-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/2548-1-0x00000000002F0000-0x00000000002F1000-memory.dmp

Filesize
4KB

Download
memory/2548-2-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

Download
memory/2548-13-0x00000000050E0000-0x00000000050F1000-memory.dmp

Filesize
68KB

Download
memory/2568-14-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/2568-15-0x00000000050E0000-0x00000000050F1000-memory.dmp

Filesize
68KB

Download
memory/2832-10-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2832-9-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2832-7-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2832-16-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2832-17-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads