tofsee | 72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35

General

Target

72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe
Size

14.5MB
MD5

3cea8daf8028e2f9ef0663cdc9a6ca46
SHA1

ad06cbbe801ef56f3dbd4a61ad0f0f43845f4a4c
SHA256

72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35
SHA512

0851fab798606fd14a26d20a2e7f2b9074ed5e5b5e1ef0dd9d6217c4b87ddd197004ae10eba5d0e678dc213cc5edc826b72fb088e01762411b62a1d7b9c839e9
SSDEEP

196608:gOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOz:S

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

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

Processes:

svchost.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\ctwhlwi = "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

Processes:

netsh.exe

pid process

2840 netsh.exe

pid	process
2840	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\ctwhlwi\ImagePath = "C:\\Windows\\SysWOW64\\ctwhlwi\\ewovulwd.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

2696 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

ewovulwd.exe

pid process

2908 ewovulwd.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

ewovulwd.exe

description pid process target process

PID 2908 set thread context of 2696 2908 ewovulwd.exe svchost.exe
Launches sc.exe 3 IoCs
Sc.exe is a Windows utlilty to control services on the system.

Processes:

sc.exesc.exesc.exe

pid process

2164 sc.exe
2792 sc.exe
3064 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2696	svchost.exe

pid	process
2908	ewovulwd.exe

description	pid	process	target process
PID 2908 set thread context of 2696	2908	ewovulwd.exe	svchost.exe

pid	process
2164	sc.exe
2792	sc.exe
3064	sc.exe

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

Processes:

netsh.exe

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

Processes:

72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.execmd.execmd.exesc.exesvchost.exesc.exesc.exenetsh.exeewovulwd.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.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	sc.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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ewovulwd.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exeewovulwd.exe

description	pid	process	target process
PID 2948 wrote to memory of 1444	2948	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe	cmd.exe
PID 2948 wrote to memory of 1444	2948	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe	cmd.exe
PID 2948 wrote to memory of 1444	2948	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe	cmd.exe
PID 2948 wrote to memory of 1444	2948	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe	cmd.exe
PID 2948 wrote to memory of 1712	2948	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe	cmd.exe
PID 2948 wrote to memory of 1712	2948	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe	cmd.exe
PID 2948 wrote to memory of 1712	2948	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe	cmd.exe
PID 2948 wrote to memory of 1712	2948	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe	cmd.exe
PID 2948 wrote to memory of 3064	2948	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe	sc.exe
PID 2948 wrote to memory of 3064	2948	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe	sc.exe
PID 2948 wrote to memory of 3064	2948	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe	sc.exe
PID 2948 wrote to memory of 3064	2948	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe	sc.exe
PID 2948 wrote to memory of 2164	2948	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe	sc.exe
PID 2948 wrote to memory of 2164	2948	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe	sc.exe
PID 2948 wrote to memory of 2164	2948	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe	sc.exe
PID 2948 wrote to memory of 2164	2948	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe	sc.exe
PID 2948 wrote to memory of 2792	2948	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe	sc.exe
PID 2948 wrote to memory of 2792	2948	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe	sc.exe
PID 2948 wrote to memory of 2792	2948	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe	sc.exe
PID 2948 wrote to memory of 2792	2948	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe	sc.exe
PID 2948 wrote to memory of 2840	2948	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe	netsh.exe
PID 2948 wrote to memory of 2840	2948	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe	netsh.exe
PID 2948 wrote to memory of 2840	2948	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe	netsh.exe
PID 2948 wrote to memory of 2840	2948	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe	netsh.exe
PID 2908 wrote to memory of 2696	2908	ewovulwd.exe	svchost.exe
PID 2908 wrote to memory of 2696	2908	ewovulwd.exe	svchost.exe
PID 2908 wrote to memory of 2696	2908	ewovulwd.exe	svchost.exe
PID 2908 wrote to memory of 2696	2908	ewovulwd.exe	svchost.exe
PID 2908 wrote to memory of 2696	2908	ewovulwd.exe	svchost.exe
PID 2908 wrote to memory of 2696	2908	ewovulwd.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe
"C:\Users\Admin\AppData\Local\Temp\72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2948
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ctwhlwi\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1444
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ewovulwd.exe" C:\Windows\SysWOW64\ctwhlwi\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1712
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create ctwhlwi binPath= "C:\Windows\SysWOW64\ctwhlwi\ewovulwd.exe /d\"C:\Users\Admin\AppData\Local\Temp\72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3064
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description ctwhlwi "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2164
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start ctwhlwi
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2792
- 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:2840

C:\Windows\SysWOW64\ctwhlwi\ewovulwd.exe
C:\Windows\SysWOW64\ctwhlwi\ewovulwd.exe /d"C:\Users\Admin\AppData\Local\Temp\72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2908
- 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:2696

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

1

T1569

Service Execution

1

T1569.002

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

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

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

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

2

T1562

Disable or Modify System Firewall

1

T1562.004

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

System Information Discovery

1

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

C:\Users\Admin\AppData\Local\Temp\ewovulwd.exe

Filesize
10.6MB

MD5
aef1afe131797665797d86ceb3f161c6

SHA1
beecdadf38cbf607d586b967f33e1b24e408b9a0

SHA256
17a540d3392565d8fedb921eaf13b02e5ca1cb1009260f5705bda24b29930518

SHA512
ab7fce006798203de6435dd9e11ffce410d8ba91d3ebf6e00e4246e76cd0deea5fc5856a6d4876321fa6e4e8dcbc5c32f7a7f72838d67a5daf34592881f7d2ac

Download Submit
memory/2696-11-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2696-14-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2696-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2696-17-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2696-18-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2908-15-0x0000000000400000-0x0000000002F11000-memory.dmp

Filesize
43.1MB

Download
memory/2948-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2948-2-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2948-8-0x0000000000400000-0x0000000002F11000-memory.dmp

Filesize
43.1MB

Download
memory/2948-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2948-9-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2948-1-0x0000000003090000-0x0000000003190000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads