tofsee | cc527877f3fe5db651531afc435632c5dd02f9b0600900b7d95d04d62edc238a

Analysis

max time kernel
145s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
02/08/2024, 16:51

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General

Target
cc527877f3fe5db651531afc435632c5dd02f9b0600900b7d95d04d62edc238a.exe
Size 11.0MB
Sample240802-vc9hdasakj
SHA256 cc527877f3fe5db651531afc435632c5dd02f9b0600900b7d95d04d62edc238a
MD5 ffeaa382b4bd7df15ea3b8dbc62dda8f
SHA1 9b7f8e4f5a57a0aae47e6d2c244f1472c77eec1c
SHA512 8900a94f2a44098c65674717de505428034ae126d611e5f6c7de3796d2ec6724a36822b0ad29445ad744975fa94694dd9041d7b7563ca6402d81b8edf11ac508
SSDEEP 24576:sCoZopQ3TmLgqkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkc:1sjms
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

patmushta.info
ovicrush.cn

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

pid	Process
4768	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\scliqxip\ImagePath = "C:\\Windows\\SysWOW64\\scliqxip\\wsxxzcnv.exe"	svchost.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-1-5-21-1194130065-3471212556-1656947724-1000\Control Panel\International\Geo\Nation	cc527877f3fe5db651531afc435632c5dd02f9b0600900b7d95d04d62edc238a.exe

Deletes itself 1 IoCs

pid	Process
3992	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3580	wsxxzcnv.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3580 set thread context of 3992	3580	wsxxzcnv.exe	98

Launches sc.exe 3 IoCs

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

pid	Process
2172	sc.exe
1316	sc.exe
2444	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

Program crash 2 IoCs

pid	pid_target	Process	procid_target
4044	4384	WerFault.exe	82
2944	3580	WerFault.exe	94

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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wsxxzcnv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cc527877f3fe5db651531afc435632c5dd02f9b0600900b7d95d04d62edc238a.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

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4384 wrote to memory of 2936	4384	cc527877f3fe5db651531afc435632c5dd02f9b0600900b7d95d04d62edc238a.exe	84
PID 4384 wrote to memory of 2936	4384	cc527877f3fe5db651531afc435632c5dd02f9b0600900b7d95d04d62edc238a.exe	84
PID 4384 wrote to memory of 2936	4384	cc527877f3fe5db651531afc435632c5dd02f9b0600900b7d95d04d62edc238a.exe	84
PID 4384 wrote to memory of 4956	4384	cc527877f3fe5db651531afc435632c5dd02f9b0600900b7d95d04d62edc238a.exe	86
PID 4384 wrote to memory of 4956	4384	cc527877f3fe5db651531afc435632c5dd02f9b0600900b7d95d04d62edc238a.exe	86
PID 4384 wrote to memory of 4956	4384	cc527877f3fe5db651531afc435632c5dd02f9b0600900b7d95d04d62edc238a.exe	86
PID 4384 wrote to memory of 1316	4384	cc527877f3fe5db651531afc435632c5dd02f9b0600900b7d95d04d62edc238a.exe	88
PID 4384 wrote to memory of 1316	4384	cc527877f3fe5db651531afc435632c5dd02f9b0600900b7d95d04d62edc238a.exe	88
PID 4384 wrote to memory of 1316	4384	cc527877f3fe5db651531afc435632c5dd02f9b0600900b7d95d04d62edc238a.exe	88
PID 4384 wrote to memory of 2444	4384	cc527877f3fe5db651531afc435632c5dd02f9b0600900b7d95d04d62edc238a.exe	90
PID 4384 wrote to memory of 2444	4384	cc527877f3fe5db651531afc435632c5dd02f9b0600900b7d95d04d62edc238a.exe	90
PID 4384 wrote to memory of 2444	4384	cc527877f3fe5db651531afc435632c5dd02f9b0600900b7d95d04d62edc238a.exe	90
PID 4384 wrote to memory of 2172	4384	cc527877f3fe5db651531afc435632c5dd02f9b0600900b7d95d04d62edc238a.exe	92
PID 4384 wrote to memory of 2172	4384	cc527877f3fe5db651531afc435632c5dd02f9b0600900b7d95d04d62edc238a.exe	92
PID 4384 wrote to memory of 2172	4384	cc527877f3fe5db651531afc435632c5dd02f9b0600900b7d95d04d62edc238a.exe	92
PID 4384 wrote to memory of 4768	4384	cc527877f3fe5db651531afc435632c5dd02f9b0600900b7d95d04d62edc238a.exe	95
PID 4384 wrote to memory of 4768	4384	cc527877f3fe5db651531afc435632c5dd02f9b0600900b7d95d04d62edc238a.exe	95
PID 4384 wrote to memory of 4768	4384	cc527877f3fe5db651531afc435632c5dd02f9b0600900b7d95d04d62edc238a.exe	95
PID 3580 wrote to memory of 3992	3580	wsxxzcnv.exe	98
PID 3580 wrote to memory of 3992	3580	wsxxzcnv.exe	98
PID 3580 wrote to memory of 3992	3580	wsxxzcnv.exe	98
PID 3580 wrote to memory of 3992	3580	wsxxzcnv.exe	98
PID 3580 wrote to memory of 3992	3580	wsxxzcnv.exe	98

C:\Users\Admin\AppData\Local\Temp\cc527877f3fe5db651531afc435632c5dd02f9b0600900b7d95d04d62edc238a.exe
"C:\Users\Admin\AppData\Local\Temp\cc527877f3fe5db651531afc435632c5dd02f9b0600900b7d95d04d62edc238a.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4384
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\scliqxip\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2936
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\wsxxzcnv.exe" C:\Windows\SysWOW64\scliqxip\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4956
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create scliqxip binPath= "C:\Windows\SysWOW64\scliqxip\wsxxzcnv.exe /d\"C:\Users\Admin\AppData\Local\Temp\cc527877f3fe5db651531afc435632c5dd02f9b0600900b7d95d04d62edc238a.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1316
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description scliqxip "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2444
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start scliqxip
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2172
- 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:4768
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4384 -s 672
  2⤵
  - Program crash
  PID:4044

C:\Windows\SysWOW64\scliqxip\wsxxzcnv.exe
C:\Windows\SysWOW64\scliqxip\wsxxzcnv.exe /d"C:\Users\Admin\AppData\Local\Temp\cc527877f3fe5db651531afc435632c5dd02f9b0600900b7d95d04d62edc238a.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3580
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:3992
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3580 -s 516
  2⤵
  - Program crash
  PID:2944

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 4384 -ip 4384
1⤵
PID:3600

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 3580 -ip 3580
1⤵
PID:3356

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

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

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

wsxxzcnv.exe

Path C:\Users\Admin\AppData\Local\Temp\wsxxzcnv.exe
Size 13.8MB
SHA256 fd003c370684460cc63c36f13e1fbbc5281212f6b18f3fe9511ff2cd08437550
MD5 4a840b5fb3555d8fe0abb4fe5b3bfd52
SHA1 88b7e371427a31a7a76fda4aa598690a951f751d
SHA512 bef70fa3fba9ec6fe454b815e2743d93c1f72282c02d65d0700099b0c488aa7c672b0fcec84fbca8884fd5d3062d040b7cb2c4e4dad9df49eafb6015b94bac0e
SSDEEP 24576:JCoZopQ3TmLgqkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk/:Esjms
MD5 SHA1 SHA512 SSDEEP

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memory/3580-17-0x0000000000400000-0x0000000000477000-memory.dmp

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memory/3580-8-0x0000000000400000-0x0000000000477000-memory.dmp

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memory/3992-12-0x0000000000C80000-0x0000000000C95000-memory.dmp

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memory/3992-9-0x0000000000C80000-0x0000000000C95000-memory.dmp

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memory/3992-18-0x0000000000C80000-0x0000000000C95000-memory.dmp

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memory/3992-19-0x0000000000C80000-0x0000000000C95000-memory.dmp

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memory/3992-20-0x0000000000C80000-0x0000000000C95000-memory.dmp

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memory/4384-3-0x0000000000400000-0x0000000000415000-memory.dmp

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memory/4384-1-0x0000000000680000-0x0000000000780000-memory.dmp

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memory/4384-13-0x0000000000400000-0x0000000000477000-memory.dmp

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memory/4384-2-0x00000000021C0000-0x00000000021D3000-memory.dmp

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memory/4384-15-0x0000000000400000-0x0000000000415000-memory.dmp

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memory/4384-14-0x00000000021C0000-0x00000000021D3000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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