tofsee | ed247101c7f12d4ee13007314837de2d70042f7318f94adef43e1d0408454309

General

Target
ed247101c7f12d4ee13007314837de2d70042f7318f94adef43e1d0408454309.exe
Size 12.4MB
Sample261111-29e4cssvhw
SHA256 ed247101c7f12d4ee13007314837de2d70042f7318f94adef43e1d0408454309
MD5 d08ead51c3ac603350cb108c2459d94c
SHA1 e001dedf518e61ba829f4e3a9df5e2cb28e00841
SHA512 9f3a09e293edef90add82bb52021f7a7887c07239c37e666298d47b94accfafd81c72b6958ea26e8ee6ba425f3163b7d8fa1f31d75b618f3a4831a0fea7a3b55
SSDEEP 49152:rlp+5rvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvn:rW
TLSH
T178D6436676D86ED9D0CA0FBC09A1C42B5DECFB34043A553096D1504F98AE78A973CBB3
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

defense_evasion discovery execution tofsee persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

defeatwax.ru
refabyd.info

Signatures

Family: Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee

Modifies Windows Firewall 2 TTPs 1 IoCs

defense_evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
1728	netsh.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-895009113-1202185046-1686627690-1000\Control Panel\International\Geo\Nation	ed247101c7f12d4ee13007314837de2d70042f7318f94adef43e1d0408454309.exe

Creates new service(s) 2 TTPs
persistence execution

Windows Service
T1543.003

Service Execution
T1569.002

Executes dropped EXE 1 IoCs

pid	Process
4936	lxeydjwe.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4936 set thread context of 2232	4936	lxeydjwe.exe	97

Launches sc.exe 3 IoCs

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

pid	Process
4676	sc.exe
2920	sc.exe
2332	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

Executes a command shell one-liner 1 TTPs 2 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
3392	cmd.exe
2256	cmd.exe

System Location Discovery: System Language Discovery 1 TTPs 8 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	lxeydjwe.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ed247101c7f12d4ee13007314837de2d70042f7318f94adef43e1d0408454309.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	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 8 IoCs

description	pid	Process	procid_target
PID 4768 wrote to memory of 3392	4768	ed247101c7f12d4ee13007314837de2d70042f7318f94adef43e1d0408454309.exe	85
PID 4768 wrote to memory of 2256	4768	ed247101c7f12d4ee13007314837de2d70042f7318f94adef43e1d0408454309.exe	87
PID 4768 wrote to memory of 4676	4768	ed247101c7f12d4ee13007314837de2d70042f7318f94adef43e1d0408454309.exe	89
PID 4768 wrote to memory of 2920	4768	ed247101c7f12d4ee13007314837de2d70042f7318f94adef43e1d0408454309.exe	91
PID 4768 wrote to memory of 2332	4768	ed247101c7f12d4ee13007314837de2d70042f7318f94adef43e1d0408454309.exe	94
PID 4936 wrote to memory of 2232	4936	lxeydjwe.exe	97
PID 4936 wrote to memory of 2232	4936	lxeydjwe.exe	97
PID 4768 wrote to memory of 1728	4768	ed247101c7f12d4ee13007314837de2d70042f7318f94adef43e1d0408454309.exe	98

C:\Users\Admin\AppData\Local\Temp\ed247101c7f12d4ee13007314837de2d70042f7318f94adef43e1d0408454309.exe
"C:\Users\Admin\AppData\Local\Temp\ed247101c7f12d4ee13007314837de2d70042f7318f94adef43e1d0408454309.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4768
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\yeklvcuv\
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  PID:3392
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\lxeydjwe.exe" C:\Windows\SysWOW64\yeklvcuv\
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  PID:2256
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create yeklvcuv binPath= "C:\Windows\SysWOW64\yeklvcuv\lxeydjwe.exe /d\"C:\Users\Admin\AppData\Local\Temp\ed247101c7f12d4ee13007314837de2d70042f7318f94adef43e1d0408454309.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4676
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description yeklvcuv "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2920
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start yeklvcuv
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2332
- 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:1728

C:\Windows\SysWOW64\yeklvcuv\lxeydjwe.exe
C:\Windows\SysWOW64\yeklvcuv\lxeydjwe.exe /d"C:\Users\Admin\AppData\Local\Temp\ed247101c7f12d4ee13007314837de2d70042f7318f94adef43e1d0408454309.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4936
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  PID:2232

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

System Services

1

T1569

Service Execution

1

T1569.002

Persistence

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Privilege Escalation

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Defense Evasion

Impair Defenses

1

T1562

Disable or Modify System Firewall

1

T1562.004

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

lxeydjwe.exe

Path C:\Users\Admin\AppData\Local\Temp\lxeydjwe.exe
Size 13.4MB
SHA256 c36e0b2b5bc9dcf75eaed368d10dcfd56f2430cacba865ba70b986b5cdaa010a
MD5 20a68112ab516bcb52ed3241183930b2
SHA1 9d12665758b2d9064d37cbeaf38a19f2687bdbf0
SHA512 70277dee422da2b48f3f8748084e334e6c39f8fbb892ec469914d5ed6cfc4c5607c87bb1f55ba02307f77ad37af6d38a79319beeb509adf7cdcb7b3d840f143f
SSDEEP 49152:ilp+5rvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvH:iW
TLSH
T18EE6436676D86ED9D0CA0FBC09A1C42B5DECFB34043A553096D1504F98AE78A973CBB3
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2232-6-0x0000000000C00000-0x0000000000C49000-memory.dmp

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memory/4768-0-0x0000000000400000-0x0000000000449000-memory.dmp

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memory/4768-10-0x0000000000400000-0x0000000000449000-memory.dmp

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memory/4936-5-0x0000000000400000-0x0000000000449000-memory.dmp

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memory/4936-9-0x0000000000400000-0x0000000000449000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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