tofsee | eef9674a3b52a43eb0fdfaaa7d431a4c2b7dcf48f4ec3bc0e0f1a5f3c0d65817

Analysis

max time kernel
151s
max time network
153s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
11-01-2025 05:57

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General

Target

JaffaCakes118_f8d73df41f2762b31b9de96cfa433aa0.exe
Size

10.4MB
MD5

f8d73df41f2762b31b9de96cfa433aa0
SHA1

ae4aa80d63ec0a48f6b834a8cd862e0638afd383
SHA256

eef9674a3b52a43eb0fdfaaa7d431a4c2b7dcf48f4ec3bc0e0f1a5f3c0d65817
SHA512

15a379fdeb3a2900e92553054e9acbf3e68ddbe1e29c6806164e34c8a136c8de0b5f556a15e25ddf9577caec1f7a00b7e06d7d2149c0cc35cc9a5e9419286816
SSDEEP

196608:iE/vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvH:iE

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

defeatwax.ru

refabyd.info

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\xlfobrzk = "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
1192	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\xlfobrzk\ImagePath = "C:\\Windows\\SysWOW64\\xlfobrzk\\ykrlqwjr.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2756	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2912	ykrlqwjr.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2912 set thread context of 2756	2912	ykrlqwjr.exe	44

Launches sc.exe 3 IoCs

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

pid	Process
2448	sc.exe
2888	sc.exe
2776	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

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_f8d73df41f2762b31b9de96cfa433aa0.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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ykrlqwjr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.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 30 IoCs

description	pid	Process	procid_target
PID 804 wrote to memory of 2000	804	JaffaCakes118_f8d73df41f2762b31b9de96cfa433aa0.exe	31
PID 804 wrote to memory of 2000	804	JaffaCakes118_f8d73df41f2762b31b9de96cfa433aa0.exe	31
PID 804 wrote to memory of 2000	804	JaffaCakes118_f8d73df41f2762b31b9de96cfa433aa0.exe	31
PID 804 wrote to memory of 2000	804	JaffaCakes118_f8d73df41f2762b31b9de96cfa433aa0.exe	31
PID 804 wrote to memory of 2208	804	JaffaCakes118_f8d73df41f2762b31b9de96cfa433aa0.exe	33
PID 804 wrote to memory of 2208	804	JaffaCakes118_f8d73df41f2762b31b9de96cfa433aa0.exe	33
PID 804 wrote to memory of 2208	804	JaffaCakes118_f8d73df41f2762b31b9de96cfa433aa0.exe	33
PID 804 wrote to memory of 2208	804	JaffaCakes118_f8d73df41f2762b31b9de96cfa433aa0.exe	33
PID 804 wrote to memory of 2448	804	JaffaCakes118_f8d73df41f2762b31b9de96cfa433aa0.exe	35
PID 804 wrote to memory of 2448	804	JaffaCakes118_f8d73df41f2762b31b9de96cfa433aa0.exe	35
PID 804 wrote to memory of 2448	804	JaffaCakes118_f8d73df41f2762b31b9de96cfa433aa0.exe	35
PID 804 wrote to memory of 2448	804	JaffaCakes118_f8d73df41f2762b31b9de96cfa433aa0.exe	35
PID 804 wrote to memory of 2888	804	JaffaCakes118_f8d73df41f2762b31b9de96cfa433aa0.exe	37
PID 804 wrote to memory of 2888	804	JaffaCakes118_f8d73df41f2762b31b9de96cfa433aa0.exe	37
PID 804 wrote to memory of 2888	804	JaffaCakes118_f8d73df41f2762b31b9de96cfa433aa0.exe	37
PID 804 wrote to memory of 2888	804	JaffaCakes118_f8d73df41f2762b31b9de96cfa433aa0.exe	37
PID 804 wrote to memory of 2776	804	JaffaCakes118_f8d73df41f2762b31b9de96cfa433aa0.exe	39
PID 804 wrote to memory of 2776	804	JaffaCakes118_f8d73df41f2762b31b9de96cfa433aa0.exe	39
PID 804 wrote to memory of 2776	804	JaffaCakes118_f8d73df41f2762b31b9de96cfa433aa0.exe	39
PID 804 wrote to memory of 2776	804	JaffaCakes118_f8d73df41f2762b31b9de96cfa433aa0.exe	39
PID 804 wrote to memory of 1192	804	JaffaCakes118_f8d73df41f2762b31b9de96cfa433aa0.exe	41
PID 804 wrote to memory of 1192	804	JaffaCakes118_f8d73df41f2762b31b9de96cfa433aa0.exe	41
PID 804 wrote to memory of 1192	804	JaffaCakes118_f8d73df41f2762b31b9de96cfa433aa0.exe	41
PID 804 wrote to memory of 1192	804	JaffaCakes118_f8d73df41f2762b31b9de96cfa433aa0.exe	41
PID 2912 wrote to memory of 2756	2912	ykrlqwjr.exe	44
PID 2912 wrote to memory of 2756	2912	ykrlqwjr.exe	44
PID 2912 wrote to memory of 2756	2912	ykrlqwjr.exe	44
PID 2912 wrote to memory of 2756	2912	ykrlqwjr.exe	44
PID 2912 wrote to memory of 2756	2912	ykrlqwjr.exe	44
PID 2912 wrote to memory of 2756	2912	ykrlqwjr.exe	44

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_f8d73df41f2762b31b9de96cfa433aa0.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_f8d73df41f2762b31b9de96cfa433aa0.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:804
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\xlfobrzk\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2000
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ykrlqwjr.exe" C:\Windows\SysWOW64\xlfobrzk\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2208
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create xlfobrzk binPath= "C:\Windows\SysWOW64\xlfobrzk\ykrlqwjr.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_f8d73df41f2762b31b9de96cfa433aa0.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2448
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description xlfobrzk "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2888
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start xlfobrzk
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2776
- 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:1192

C:\Windows\SysWOW64\xlfobrzk\ykrlqwjr.exe
C:\Windows\SysWOW64\xlfobrzk\ykrlqwjr.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_f8d73df41f2762b31b9de96cfa433aa0.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2912
- 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:2756

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\ykrlqwjr.exe

Filesize
10.6MB

MD5
3751583837d36bf31a9151d8c9ad573e

SHA1
d69d38ceae7c532dd7411135623213104ca264eb

SHA256
0a8d53d25a4add7242def96b63095e899addcf3ef4e208b0f85ece1017c6fd09

SHA512
ad6aa7870ceb1e53c2c68c87f27709f823246e7c0516eb628b5bfce8e17820a6820155b2aef43dea74f4f319fce8337055fcd2d4ec30fe12e80cdcb85e402b71

Download Submit
memory/804-7-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/804-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/804-1-0x0000000000960000-0x0000000000A60000-memory.dmp

Filesize
1024KB

Download
memory/804-8-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/804-6-0x0000000000400000-0x0000000000870000-memory.dmp

Filesize
4.4MB

Download
memory/804-2-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2756-14-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2756-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2756-11-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2756-16-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2756-18-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2912-17-0x0000000000400000-0x0000000000870000-memory.dmp

Filesize
4.4MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads