tofsee | c205b7fe1ffd71e1a00dbd175dde5352aa7e7e7c81754994c5ad0923e629d591

Analysis

max time kernel
148s
max time network
150s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
22-11-2024 14:19

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General

Target

c205b7fe1ffd71e1a00dbd175dde5352aa7e7e7c81754994c5ad0923e629d591.exe
Size

10.5MB
MD5

f437958a717001f8bb29ca023faf9bb7
SHA1

6771eacfab06f9290ca7276974e206316739e8bb
SHA256

c205b7fe1ffd71e1a00dbd175dde5352aa7e7e7c81754994c5ad0923e629d591
SHA512

37b3ea8fe4ac0288611010d69da0556c105eb3a886c512d4047f70f335dee9ce4cf76d5eda46d627a0d2965a187aa6ce0f434c279d8c64db25b8b4dcc059c6ff
SSDEEP

12288:jnWdwQB3a1ZAXYlVR7jbMviJvK3SRL/R/R/R/R/R/R/R/R/R/R/R/R/R/R/R/R/D:jnWdFB3a1ZLlsviJv9

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\wnnteell = "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
2792	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\wnnteell\ImagePath = "C:\\Windows\\SysWOW64\\wnnteell\\tmhtxmx.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2604	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2716	tmhtxmx.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2716 set thread context of 2604	2716	tmhtxmx.exe	44

Launches sc.exe 3 IoCs

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

pid	Process
2400	sc.exe
2852	sc.exe
2616	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	c205b7fe1ffd71e1a00dbd175dde5352aa7e7e7c81754994c5ad0923e629d591.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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tmhtxmx.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

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1384 wrote to memory of 1788	1384	c205b7fe1ffd71e1a00dbd175dde5352aa7e7e7c81754994c5ad0923e629d591.exe	31
PID 1384 wrote to memory of 1788	1384	c205b7fe1ffd71e1a00dbd175dde5352aa7e7e7c81754994c5ad0923e629d591.exe	31
PID 1384 wrote to memory of 1788	1384	c205b7fe1ffd71e1a00dbd175dde5352aa7e7e7c81754994c5ad0923e629d591.exe	31
PID 1384 wrote to memory of 1788	1384	c205b7fe1ffd71e1a00dbd175dde5352aa7e7e7c81754994c5ad0923e629d591.exe	31
PID 1384 wrote to memory of 2032	1384	c205b7fe1ffd71e1a00dbd175dde5352aa7e7e7c81754994c5ad0923e629d591.exe	33
PID 1384 wrote to memory of 2032	1384	c205b7fe1ffd71e1a00dbd175dde5352aa7e7e7c81754994c5ad0923e629d591.exe	33
PID 1384 wrote to memory of 2032	1384	c205b7fe1ffd71e1a00dbd175dde5352aa7e7e7c81754994c5ad0923e629d591.exe	33
PID 1384 wrote to memory of 2032	1384	c205b7fe1ffd71e1a00dbd175dde5352aa7e7e7c81754994c5ad0923e629d591.exe	33
PID 1384 wrote to memory of 2400	1384	c205b7fe1ffd71e1a00dbd175dde5352aa7e7e7c81754994c5ad0923e629d591.exe	35
PID 1384 wrote to memory of 2400	1384	c205b7fe1ffd71e1a00dbd175dde5352aa7e7e7c81754994c5ad0923e629d591.exe	35
PID 1384 wrote to memory of 2400	1384	c205b7fe1ffd71e1a00dbd175dde5352aa7e7e7c81754994c5ad0923e629d591.exe	35
PID 1384 wrote to memory of 2400	1384	c205b7fe1ffd71e1a00dbd175dde5352aa7e7e7c81754994c5ad0923e629d591.exe	35
PID 1384 wrote to memory of 2852	1384	c205b7fe1ffd71e1a00dbd175dde5352aa7e7e7c81754994c5ad0923e629d591.exe	37
PID 1384 wrote to memory of 2852	1384	c205b7fe1ffd71e1a00dbd175dde5352aa7e7e7c81754994c5ad0923e629d591.exe	37
PID 1384 wrote to memory of 2852	1384	c205b7fe1ffd71e1a00dbd175dde5352aa7e7e7c81754994c5ad0923e629d591.exe	37
PID 1384 wrote to memory of 2852	1384	c205b7fe1ffd71e1a00dbd175dde5352aa7e7e7c81754994c5ad0923e629d591.exe	37
PID 1384 wrote to memory of 2616	1384	c205b7fe1ffd71e1a00dbd175dde5352aa7e7e7c81754994c5ad0923e629d591.exe	39
PID 1384 wrote to memory of 2616	1384	c205b7fe1ffd71e1a00dbd175dde5352aa7e7e7c81754994c5ad0923e629d591.exe	39
PID 1384 wrote to memory of 2616	1384	c205b7fe1ffd71e1a00dbd175dde5352aa7e7e7c81754994c5ad0923e629d591.exe	39
PID 1384 wrote to memory of 2616	1384	c205b7fe1ffd71e1a00dbd175dde5352aa7e7e7c81754994c5ad0923e629d591.exe	39
PID 1384 wrote to memory of 2792	1384	c205b7fe1ffd71e1a00dbd175dde5352aa7e7e7c81754994c5ad0923e629d591.exe	42
PID 1384 wrote to memory of 2792	1384	c205b7fe1ffd71e1a00dbd175dde5352aa7e7e7c81754994c5ad0923e629d591.exe	42
PID 1384 wrote to memory of 2792	1384	c205b7fe1ffd71e1a00dbd175dde5352aa7e7e7c81754994c5ad0923e629d591.exe	42
PID 1384 wrote to memory of 2792	1384	c205b7fe1ffd71e1a00dbd175dde5352aa7e7e7c81754994c5ad0923e629d591.exe	42
PID 2716 wrote to memory of 2604	2716	tmhtxmx.exe	44
PID 2716 wrote to memory of 2604	2716	tmhtxmx.exe	44
PID 2716 wrote to memory of 2604	2716	tmhtxmx.exe	44
PID 2716 wrote to memory of 2604	2716	tmhtxmx.exe	44
PID 2716 wrote to memory of 2604	2716	tmhtxmx.exe	44
PID 2716 wrote to memory of 2604	2716	tmhtxmx.exe	44

C:\Users\Admin\AppData\Local\Temp\c205b7fe1ffd71e1a00dbd175dde5352aa7e7e7c81754994c5ad0923e629d591.exe
"C:\Users\Admin\AppData\Local\Temp\c205b7fe1ffd71e1a00dbd175dde5352aa7e7e7c81754994c5ad0923e629d591.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1384
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\wnnteell\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1788
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\tmhtxmx.exe" C:\Windows\SysWOW64\wnnteell\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2032
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create wnnteell binPath= "C:\Windows\SysWOW64\wnnteell\tmhtxmx.exe /d\"C:\Users\Admin\AppData\Local\Temp\c205b7fe1ffd71e1a00dbd175dde5352aa7e7e7c81754994c5ad0923e629d591.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2400
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description wnnteell "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2852
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start wnnteell
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2616
- 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:2792

C:\Windows\SysWOW64\wnnteell\tmhtxmx.exe
C:\Windows\SysWOW64\wnnteell\tmhtxmx.exe /d"C:\Users\Admin\AppData\Local\Temp\c205b7fe1ffd71e1a00dbd175dde5352aa7e7e7c81754994c5ad0923e629d591.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2716
- 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:2604

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\tmhtxmx.exe

Filesize
14.8MB

MD5
65a06439cf18aff149651fc9933ca9cb

SHA1
6ae07bd5b080778a12b9736906574e36763c9dd0

SHA256
5ba33924fa7d8d3c817099d9e30794db3150a2f2c276d6c21086667704f1cde7

SHA512
18fa0db87400745f7ba67422631a4f8ec6d20dbdfe989a5bd9372d772086e7694e74835cda6a96df19d99b6a10a80f2f82c0520a198f2919c3dd3f6a68dfaff4

Download Submit
memory/1384-9-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/1384-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1384-2-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/1384-8-0x0000000000400000-0x0000000000785000-memory.dmp

Filesize
3.5MB

Download
memory/1384-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1384-1-0x0000000000BF0000-0x0000000000CF0000-memory.dmp

Filesize
1024KB

Download
memory/2604-11-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2604-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2604-14-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2604-17-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2604-18-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2716-15-0x0000000000400000-0x0000000000785000-memory.dmp

Filesize
3.5MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads