tofsee | 03a239c50ad79fc193158e7b7750bc9c950ff2efa27003f80c54993a4605c1b0

Analysis

max time kernel
150s
max time network
150s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
22-11-2024 07:07

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General

Target

03a239c50ad79fc193158e7b7750bc9c950ff2efa27003f80c54993a4605c1b0.exe
Size

12.9MB
MD5

8556b989b136705da62e8181b8e1b066
SHA1

8ab93dd9d5bd43efb00c8d027f08ecd5d1adf96b
SHA256

03a239c50ad79fc193158e7b7750bc9c950ff2efa27003f80c54993a4605c1b0
SHA512

e45b2343243e9a73f6edbdd75ace557bd33b887adc29408378d606246227f6b4ed5d006b14b8a37c62a165bdccafa46271a86aa1cb138573066553dda5159cf7
SSDEEP

49152:ukHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHP:N

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\yfzclmvm = "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
2716	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\yfzclmvm\ImagePath = "C:\\Windows\\SysWOW64\\yfzclmvm\\tmhtxmx.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2248	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2728	tmhtxmx.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2728 set thread context of 2248	2728	tmhtxmx.exe	44

Launches sc.exe 3 IoCs

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

pid	Process
2328	sc.exe
2700	sc.exe
2832	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	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	03a239c50ad79fc193158e7b7750bc9c950ff2efa27003f80c54993a4605c1b0.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 2496 wrote to memory of 2344	2496	03a239c50ad79fc193158e7b7750bc9c950ff2efa27003f80c54993a4605c1b0.exe	31
PID 2496 wrote to memory of 2344	2496	03a239c50ad79fc193158e7b7750bc9c950ff2efa27003f80c54993a4605c1b0.exe	31
PID 2496 wrote to memory of 2344	2496	03a239c50ad79fc193158e7b7750bc9c950ff2efa27003f80c54993a4605c1b0.exe	31
PID 2496 wrote to memory of 2344	2496	03a239c50ad79fc193158e7b7750bc9c950ff2efa27003f80c54993a4605c1b0.exe	31
PID 2496 wrote to memory of 1808	2496	03a239c50ad79fc193158e7b7750bc9c950ff2efa27003f80c54993a4605c1b0.exe	33
PID 2496 wrote to memory of 1808	2496	03a239c50ad79fc193158e7b7750bc9c950ff2efa27003f80c54993a4605c1b0.exe	33
PID 2496 wrote to memory of 1808	2496	03a239c50ad79fc193158e7b7750bc9c950ff2efa27003f80c54993a4605c1b0.exe	33
PID 2496 wrote to memory of 1808	2496	03a239c50ad79fc193158e7b7750bc9c950ff2efa27003f80c54993a4605c1b0.exe	33
PID 2496 wrote to memory of 2328	2496	03a239c50ad79fc193158e7b7750bc9c950ff2efa27003f80c54993a4605c1b0.exe	35
PID 2496 wrote to memory of 2328	2496	03a239c50ad79fc193158e7b7750bc9c950ff2efa27003f80c54993a4605c1b0.exe	35
PID 2496 wrote to memory of 2328	2496	03a239c50ad79fc193158e7b7750bc9c950ff2efa27003f80c54993a4605c1b0.exe	35
PID 2496 wrote to memory of 2328	2496	03a239c50ad79fc193158e7b7750bc9c950ff2efa27003f80c54993a4605c1b0.exe	35
PID 2496 wrote to memory of 2700	2496	03a239c50ad79fc193158e7b7750bc9c950ff2efa27003f80c54993a4605c1b0.exe	37
PID 2496 wrote to memory of 2700	2496	03a239c50ad79fc193158e7b7750bc9c950ff2efa27003f80c54993a4605c1b0.exe	37
PID 2496 wrote to memory of 2700	2496	03a239c50ad79fc193158e7b7750bc9c950ff2efa27003f80c54993a4605c1b0.exe	37
PID 2496 wrote to memory of 2700	2496	03a239c50ad79fc193158e7b7750bc9c950ff2efa27003f80c54993a4605c1b0.exe	37
PID 2496 wrote to memory of 2832	2496	03a239c50ad79fc193158e7b7750bc9c950ff2efa27003f80c54993a4605c1b0.exe	39
PID 2496 wrote to memory of 2832	2496	03a239c50ad79fc193158e7b7750bc9c950ff2efa27003f80c54993a4605c1b0.exe	39
PID 2496 wrote to memory of 2832	2496	03a239c50ad79fc193158e7b7750bc9c950ff2efa27003f80c54993a4605c1b0.exe	39
PID 2496 wrote to memory of 2832	2496	03a239c50ad79fc193158e7b7750bc9c950ff2efa27003f80c54993a4605c1b0.exe	39
PID 2496 wrote to memory of 2716	2496	03a239c50ad79fc193158e7b7750bc9c950ff2efa27003f80c54993a4605c1b0.exe	42
PID 2496 wrote to memory of 2716	2496	03a239c50ad79fc193158e7b7750bc9c950ff2efa27003f80c54993a4605c1b0.exe	42
PID 2496 wrote to memory of 2716	2496	03a239c50ad79fc193158e7b7750bc9c950ff2efa27003f80c54993a4605c1b0.exe	42
PID 2496 wrote to memory of 2716	2496	03a239c50ad79fc193158e7b7750bc9c950ff2efa27003f80c54993a4605c1b0.exe	42
PID 2728 wrote to memory of 2248	2728	tmhtxmx.exe	44
PID 2728 wrote to memory of 2248	2728	tmhtxmx.exe	44
PID 2728 wrote to memory of 2248	2728	tmhtxmx.exe	44
PID 2728 wrote to memory of 2248	2728	tmhtxmx.exe	44
PID 2728 wrote to memory of 2248	2728	tmhtxmx.exe	44
PID 2728 wrote to memory of 2248	2728	tmhtxmx.exe	44

C:\Users\Admin\AppData\Local\Temp\03a239c50ad79fc193158e7b7750bc9c950ff2efa27003f80c54993a4605c1b0.exe
"C:\Users\Admin\AppData\Local\Temp\03a239c50ad79fc193158e7b7750bc9c950ff2efa27003f80c54993a4605c1b0.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2496
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\yfzclmvm\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2344
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\tmhtxmx.exe" C:\Windows\SysWOW64\yfzclmvm\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1808
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create yfzclmvm binPath= "C:\Windows\SysWOW64\yfzclmvm\tmhtxmx.exe /d\"C:\Users\Admin\AppData\Local\Temp\03a239c50ad79fc193158e7b7750bc9c950ff2efa27003f80c54993a4605c1b0.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2328
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description yfzclmvm "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2700
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start yfzclmvm
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2832
- 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:2716

C:\Windows\SysWOW64\yfzclmvm\tmhtxmx.exe
C:\Windows\SysWOW64\yfzclmvm\tmhtxmx.exe /d"C:\Users\Admin\AppData\Local\Temp\03a239c50ad79fc193158e7b7750bc9c950ff2efa27003f80c54993a4605c1b0.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2728
- 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:2248

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
10.4MB

MD5
ac31feb7c7a5b60cc534f63b301199ad

SHA1
450cd8810358becb2edac01a9257f7e9d59f10e2

SHA256
577d01c3f32c41e1998c46be5470c5cec640082d5308b59aebd9f54b39cceddc

SHA512
1c929b5b4c2e9bb7a4870a7ec25ab4ec7ec43cb48fb08b9402695ebcb74c4ec9a78eadb51a1174f799f4a393ee767d5306600c4acde60f82dff5af05bf1e5f0c

Download Submit
memory/2248-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2248-14-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2248-11-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2248-17-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2248-18-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2496-1-0x0000000000290000-0x0000000000390000-memory.dmp

Filesize
1024KB

Download
memory/2496-2-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2496-4-0x0000000000400000-0x0000000000785000-memory.dmp

Filesize
3.5MB

Download
memory/2496-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2496-9-0x0000000000400000-0x0000000000785000-memory.dmp

Filesize
3.5MB

Download
memory/2728-15-0x0000000000400000-0x0000000000785000-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