tofsee | c655e59546447547e0b3a212f95ec11f56a2180b9fcbe07d13b32e1ca824d07d

Analysis

max time kernel
147s
max time network
148s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
06-01-2025 11:04

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General

Target

JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe
Size

13.0MB
MD5

1fe610316eb9a8d8526f9942a34cef4f
SHA1

0c8fc94e795a25cfe499447432ac55b13618ca2b
SHA256

c655e59546447547e0b3a212f95ec11f56a2180b9fcbe07d13b32e1ca824d07d
SHA512

b91713bd86f0bdfde263588f517b4ddf8aafc370efa04a836235307e31489a4bb862992de0486839bfdc84e8c17d004c6d81d4d77bde867fc59d2711acb57e0f
SSDEEP

196608:lYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYv:

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

quadoil.ru

lakeflex.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\fbeyoqzv = "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
2784	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\fbeyoqzv\ImagePath = "C:\\Windows\\SysWOW64\\fbeyoqzv\\strbexcn.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
1776	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2636	strbexcn.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2636 set thread context of 1776	2636	strbexcn.exe	43

Launches sc.exe 3 IoCs

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

pid	Process
2872	sc.exe
1716	sc.exe
2604	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 value enumerated	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe
Key queried	\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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	strbexcn.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.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	netsh.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2176 wrote to memory of 2792	2176	JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe	30
PID 2176 wrote to memory of 2792	2176	JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe	30
PID 2176 wrote to memory of 2792	2176	JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe	30
PID 2176 wrote to memory of 2792	2176	JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe	30
PID 2176 wrote to memory of 2776	2176	JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe	32
PID 2176 wrote to memory of 2776	2176	JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe	32
PID 2176 wrote to memory of 2776	2176	JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe	32
PID 2176 wrote to memory of 2776	2176	JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe	32
PID 2176 wrote to memory of 2872	2176	JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe	34
PID 2176 wrote to memory of 2872	2176	JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe	34
PID 2176 wrote to memory of 2872	2176	JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe	34
PID 2176 wrote to memory of 2872	2176	JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe	34
PID 2176 wrote to memory of 1716	2176	JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe	36
PID 2176 wrote to memory of 1716	2176	JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe	36
PID 2176 wrote to memory of 1716	2176	JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe	36
PID 2176 wrote to memory of 1716	2176	JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe	36
PID 2176 wrote to memory of 2604	2176	JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe	38
PID 2176 wrote to memory of 2604	2176	JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe	38
PID 2176 wrote to memory of 2604	2176	JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe	38
PID 2176 wrote to memory of 2604	2176	JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe	38
PID 2176 wrote to memory of 2784	2176	JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe	41
PID 2176 wrote to memory of 2784	2176	JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe	41
PID 2176 wrote to memory of 2784	2176	JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe	41
PID 2176 wrote to memory of 2784	2176	JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe	41
PID 2636 wrote to memory of 1776	2636	strbexcn.exe	43
PID 2636 wrote to memory of 1776	2636	strbexcn.exe	43
PID 2636 wrote to memory of 1776	2636	strbexcn.exe	43
PID 2636 wrote to memory of 1776	2636	strbexcn.exe	43
PID 2636 wrote to memory of 1776	2636	strbexcn.exe	43
PID 2636 wrote to memory of 1776	2636	strbexcn.exe	43

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2176
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\fbeyoqzv\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2792
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\strbexcn.exe" C:\Windows\SysWOW64\fbeyoqzv\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2776
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create fbeyoqzv binPath= "C:\Windows\SysWOW64\fbeyoqzv\strbexcn.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2872
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description fbeyoqzv "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1716
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start fbeyoqzv
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2604
- 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:2784

C:\Windows\SysWOW64\fbeyoqzv\strbexcn.exe
C:\Windows\SysWOW64\fbeyoqzv\strbexcn.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2636
- 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:1776

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\strbexcn.exe

Filesize
10.9MB

MD5
6cfaa8216b29cb02ee5fe46a54ece341

SHA1
7f2c864163cf886d91228c5888921f04f6f18f31

SHA256
1b75e793d288c8ef8cd802e9d6fc8911299580ad6c8e9daaad2b91c7f527fede

SHA512
24a4116933dd60a3122e0502b12cc18e525caf23140d30527f87f5c78134eecedab718ca595316c4940a10209bab14b80450782a7b3f6dc32772b5f6644377d2

Download Submit
memory/1776-11-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1776-14-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1776-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1776-16-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1776-18-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2176-4-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2176-2-0x0000000000230000-0x0000000000243000-memory.dmp

Filesize
76KB

Download
memory/2176-8-0x0000000000400000-0x0000000002F0D000-memory.dmp

Filesize
43.1MB

Download
memory/2176-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2176-9-0x0000000000230000-0x0000000000243000-memory.dmp

Filesize
76KB

Download
memory/2176-1-0x0000000003010000-0x0000000003110000-memory.dmp

Filesize
1024KB

Download
memory/2636-17-0x0000000000400000-0x0000000002F0D000-memory.dmp

Filesize
43.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads