tofsee | 7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d

General

Target

7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe
Size

11.2MB
MD5

dc95cb1290fa14086d6e54605ef163e4
SHA1

e38ae542e1c56fc2db4e3976c86af29faf48293a
SHA256

7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d
SHA512

7009d924341b95beb3fb709b6895a44364fa6f9f1f2ce019ce972cdad24870e09abc6e08064e5478a10b21253bf7126b15bab8be3eee0ef37c7ad29ccc64955a
SSDEEP

1536:CpUJsMq8nDNrnUtDDqJ55fNBVcmiCxmeZUUfOxxjDRvgdi0/zvjHNq8wR4vyKT:O6nln1X17rpLfOz3t8Fbti4v

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

103.248.137.133

59.188.74.26

115.230.124.76

111.121.193.242

Signatures

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

3004 netsh.exe

pid	process
3004	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\lnyjemqg\ImagePath = "C:\\Windows\\SysWOW64\\lnyjemqg\\chlynkpt.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

2728 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

chlynkpt.exe

pid process

2784 chlynkpt.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

chlynkpt.exe

description pid process target process

PID 2784 set thread context of 2728 2784 chlynkpt.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

2672 sc.exe
2284 sc.exe
1868 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2728	svchost.exe

pid	process
2784	chlynkpt.exe

description	pid	process	target process
PID 2784 set thread context of 2728	2784	chlynkpt.exe	svchost.exe

pid	process
2672	sc.exe
2284	sc.exe
1868	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:

7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exesc.exenetsh.execmd.execmd.exesc.exesc.exechlynkpt.exesvchost.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.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	cmd.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	chlynkpt.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exechlynkpt.exe

description	pid	process	target process
PID 3032 wrote to memory of 2288	3032	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	cmd.exe
PID 3032 wrote to memory of 2288	3032	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	cmd.exe
PID 3032 wrote to memory of 2288	3032	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	cmd.exe
PID 3032 wrote to memory of 2288	3032	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	cmd.exe
PID 3032 wrote to memory of 868	3032	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	cmd.exe
PID 3032 wrote to memory of 868	3032	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	cmd.exe
PID 3032 wrote to memory of 868	3032	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	cmd.exe
PID 3032 wrote to memory of 868	3032	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	cmd.exe
PID 3032 wrote to memory of 2284	3032	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	sc.exe
PID 3032 wrote to memory of 2284	3032	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	sc.exe
PID 3032 wrote to memory of 2284	3032	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	sc.exe
PID 3032 wrote to memory of 2284	3032	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	sc.exe
PID 3032 wrote to memory of 1868	3032	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	sc.exe
PID 3032 wrote to memory of 1868	3032	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	sc.exe
PID 3032 wrote to memory of 1868	3032	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	sc.exe
PID 3032 wrote to memory of 1868	3032	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	sc.exe
PID 3032 wrote to memory of 2672	3032	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	sc.exe
PID 3032 wrote to memory of 2672	3032	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	sc.exe
PID 3032 wrote to memory of 2672	3032	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	sc.exe
PID 3032 wrote to memory of 2672	3032	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	sc.exe
PID 3032 wrote to memory of 3004	3032	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	netsh.exe
PID 3032 wrote to memory of 3004	3032	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	netsh.exe
PID 3032 wrote to memory of 3004	3032	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	netsh.exe
PID 3032 wrote to memory of 3004	3032	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	netsh.exe
PID 2784 wrote to memory of 2728	2784	chlynkpt.exe	svchost.exe
PID 2784 wrote to memory of 2728	2784	chlynkpt.exe	svchost.exe
PID 2784 wrote to memory of 2728	2784	chlynkpt.exe	svchost.exe
PID 2784 wrote to memory of 2728	2784	chlynkpt.exe	svchost.exe
PID 2784 wrote to memory of 2728	2784	chlynkpt.exe	svchost.exe
PID 2784 wrote to memory of 2728	2784	chlynkpt.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe
"C:\Users\Admin\AppData\Local\Temp\7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3032

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\lnyjemqg\
2⤵
- System Location Discovery: System Language Discovery
PID:2288

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\chlynkpt.exe" C:\Windows\SysWOW64\lnyjemqg\
2⤵
- System Location Discovery: System Language Discovery
PID:868

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create lnyjemqg binPath= "C:\Windows\SysWOW64\lnyjemqg\chlynkpt.exe /d\"C:\Users\Admin\AppData\Local\Temp\7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe\"" type= own start= auto DisplayName= "P2P Support"
2⤵
- Launches sc.exe
- System Location Discovery: System Language Discovery
PID:2284

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description lnyjemqg "Internet Mobile Support"
2⤵
- Launches sc.exe
- System Location Discovery: System Language Discovery
PID:1868

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start lnyjemqg
2⤵
- Launches sc.exe
- System Location Discovery: System Language Discovery
PID:2672

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:3004

C:\Windows\SysWOW64\lnyjemqg\chlynkpt.exe
C:\Windows\SysWOW64\lnyjemqg\chlynkpt.exe /d"C:\Users\Admin\AppData\Local\Temp\7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2784

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
- Deletes itself
- System Location Discovery: System Language Discovery
PID:2728

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

1

T1562

Disable or Modify System Firewall

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\chlynkpt.exe

Filesize
12.6MB

MD5
f295057ad3850156f1f1b24a4ed1fa03

SHA1
acbf76a658a3a3717aae098f84c8768013d5a2aa

SHA256
2e46f481c3aab981c59b5bf876c9b86ae13cff8dfe18140e11d35b05b12ccd10

SHA512
0b566eb60965ffeef0d1ab2450dcc8ec6b39f8fa1b8c6027aecd9435958159c862a166b68155eb3c4b0b73b68af4ef3083f10651538bf37b9c3bed848beaa418

Download Submit
memory/2728-14-0x00000000000D0000-0x00000000000E6000-memory.dmp

Filesize
88KB

Download
memory/2728-19-0x00000000000D0000-0x00000000000E6000-memory.dmp

Filesize
88KB

Download
memory/2728-16-0x00000000000D0000-0x00000000000E6000-memory.dmp

Filesize
88KB

Download
memory/2728-11-0x00000000000D0000-0x00000000000E6000-memory.dmp

Filesize
88KB

Download
memory/2728-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2784-18-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/2784-7-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/3032-3-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/3032-9-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/3032-0-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/3032-2-0x0000000000250000-0x0000000000251000-memory.dmp

Filesize
4KB

Download
memory/3032-1-0x0000000000240000-0x0000000000241000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads