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

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\ajxruxxw = "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

2728 netsh.exe

pid	process
2728	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\ajxruxxw\ImagePath = "C:\\Windows\\SysWOW64\\ajxruxxw\\nbcrtidl.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

2704 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

nbcrtidl.exe

pid process

824 nbcrtidl.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

nbcrtidl.exe

description pid process target process

PID 824 set thread context of 2704 824 nbcrtidl.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

2332 sc.exe
2240 sc.exe
1904 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2704	svchost.exe

pid	process
824	nbcrtidl.exe

description	pid	process	target process
PID 824 set thread context of 2704	824	nbcrtidl.exe	svchost.exe

pid	process
2332	sc.exe
2240	sc.exe
1904	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 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

Processes:

sc.exenbcrtidl.exenetsh.execmd.exesc.exesc.exesvchost.exe7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.execmd.exe

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

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exenbcrtidl.exe

description	pid	process	target process
PID 1812 wrote to memory of 2104	1812	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	cmd.exe
PID 1812 wrote to memory of 2104	1812	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	cmd.exe
PID 1812 wrote to memory of 2104	1812	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	cmd.exe
PID 1812 wrote to memory of 2104	1812	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	cmd.exe
PID 1812 wrote to memory of 2468	1812	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	cmd.exe
PID 1812 wrote to memory of 2468	1812	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	cmd.exe
PID 1812 wrote to memory of 2468	1812	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	cmd.exe
PID 1812 wrote to memory of 2468	1812	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	cmd.exe
PID 1812 wrote to memory of 2332	1812	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	sc.exe
PID 1812 wrote to memory of 2332	1812	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	sc.exe
PID 1812 wrote to memory of 2332	1812	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	sc.exe
PID 1812 wrote to memory of 2332	1812	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	sc.exe
PID 1812 wrote to memory of 2240	1812	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	sc.exe
PID 1812 wrote to memory of 2240	1812	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	sc.exe
PID 1812 wrote to memory of 2240	1812	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	sc.exe
PID 1812 wrote to memory of 2240	1812	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	sc.exe
PID 1812 wrote to memory of 1904	1812	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	sc.exe
PID 1812 wrote to memory of 1904	1812	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	sc.exe
PID 1812 wrote to memory of 1904	1812	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	sc.exe
PID 1812 wrote to memory of 1904	1812	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	sc.exe
PID 1812 wrote to memory of 2728	1812	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	netsh.exe
PID 1812 wrote to memory of 2728	1812	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	netsh.exe
PID 1812 wrote to memory of 2728	1812	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	netsh.exe
PID 1812 wrote to memory of 2728	1812	7d33c7099e8696a3c06361ee3d4da8c45461cd3fdb6fe354d81be76fe5d8625d.exe	netsh.exe
PID 824 wrote to memory of 2704	824	nbcrtidl.exe	svchost.exe
PID 824 wrote to memory of 2704	824	nbcrtidl.exe	svchost.exe
PID 824 wrote to memory of 2704	824	nbcrtidl.exe	svchost.exe
PID 824 wrote to memory of 2704	824	nbcrtidl.exe	svchost.exe
PID 824 wrote to memory of 2704	824	nbcrtidl.exe	svchost.exe
PID 824 wrote to memory of 2704	824	nbcrtidl.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:1812
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ajxruxxw\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2104
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\nbcrtidl.exe" C:\Windows\SysWOW64\ajxruxxw\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2468
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create ajxruxxw binPath= "C:\Windows\SysWOW64\ajxruxxw\nbcrtidl.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:2332
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description ajxruxxw "Internet Mobile Support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2240
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start ajxruxxw
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1904
- 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:2728

C:\Windows\SysWOW64\ajxruxxw\nbcrtidl.exe
C:\Windows\SysWOW64\ajxruxxw\nbcrtidl.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:824
- 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:2704

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\nbcrtidl.exe

Filesize
13.3MB

MD5
c88d4f7315e4f79d382599e9319b0dbb

SHA1
14f260390b82e531dffc004fa57f0755e89415be

SHA256
7e8b3657621db68c779972034daf08912cad09e93e1c4c202a1c269c1c97d095

SHA512
b6bfe33156dd92a8b673ed0d69d42ed928d22f2db52777efa750c98b1ee2a9fb5ce47dc3c36e10fd699293291ff528854297491bb5d2a431f30dc5c3850f6a37

Download Submit
memory/824-17-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/824-7-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/1812-9-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/1812-2-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/1812-3-0x0000000000250000-0x0000000000251000-memory.dmp

Filesize
4KB

Download
memory/1812-0-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/1812-1-0x0000000000240000-0x0000000000241000-memory.dmp

Filesize
4KB

Download
memory/2704-14-0x0000000000080000-0x0000000000096000-memory.dmp

Filesize
88KB

Download
memory/2704-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2704-11-0x0000000000080000-0x0000000000096000-memory.dmp

Filesize
88KB

Download
memory/2704-18-0x0000000000080000-0x0000000000096000-memory.dmp

Filesize
88KB

Download
memory/2704-19-0x0000000000080000-0x0000000000096000-memory.dmp

Filesize
88KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads