tofsee | c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0

General

Target

c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe
Size

12.7MB
MD5

e2151306920f0b6337def574ee7008d6
SHA1

8679ca5f98cfc2b88fc988b79c5bf9a36c7d3775
SHA256

c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0
SHA512

97fc4eb0636c5917c5aadb433a90a89412a86ed731782347d6c7f6dc19ba8090972c6fa2a7dde6a05d10d1e35f5c637cb3a961f823592ab47f65daaab491bca1
SSDEEP

49152:TP1IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIK:c

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
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

2088 netsh.exe

pid	process
2088	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\wzgywhy\ImagePath = "C:\\Windows\\SysWOW64\\wzgywhy\\bufvgdwp.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

Processes:

c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

4048 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

bufvgdwp.exe

pid process

1156 bufvgdwp.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

bufvgdwp.exe

description pid process target process

PID 1156 set thread context of 4048 1156 bufvgdwp.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

3188 sc.exe
3964 sc.exe
1572 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
4048	svchost.exe

pid	process
1156	bufvgdwp.exe

description	pid	process	target process
PID 1156 set thread context of 4048	1156	bufvgdwp.exe	svchost.exe

pid	process
3188	sc.exe
3964	sc.exe
1572	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 queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid	pid_target	process	target process
1760	2068	WerFault.exe	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe
1912	1156	WerFault.exe	bufvgdwp.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:

c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.execmd.exesc.exesc.execmd.exesc.exenetsh.exebufvgdwp.exesvchost.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.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	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	bufvgdwp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exebufvgdwp.exe

description	pid	process	target process
PID 2068 wrote to memory of 4156	2068	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe	cmd.exe
PID 2068 wrote to memory of 4156	2068	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe	cmd.exe
PID 2068 wrote to memory of 4156	2068	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe	cmd.exe
PID 2068 wrote to memory of 5020	2068	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe	cmd.exe
PID 2068 wrote to memory of 5020	2068	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe	cmd.exe
PID 2068 wrote to memory of 5020	2068	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe	cmd.exe
PID 2068 wrote to memory of 3188	2068	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe	sc.exe
PID 2068 wrote to memory of 3188	2068	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe	sc.exe
PID 2068 wrote to memory of 3188	2068	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe	sc.exe
PID 2068 wrote to memory of 3964	2068	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe	sc.exe
PID 2068 wrote to memory of 3964	2068	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe	sc.exe
PID 2068 wrote to memory of 3964	2068	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe	sc.exe
PID 2068 wrote to memory of 1572	2068	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe	sc.exe
PID 2068 wrote to memory of 1572	2068	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe	sc.exe
PID 2068 wrote to memory of 1572	2068	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe	sc.exe
PID 2068 wrote to memory of 2088	2068	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe	netsh.exe
PID 2068 wrote to memory of 2088	2068	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe	netsh.exe
PID 2068 wrote to memory of 2088	2068	c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe	netsh.exe
PID 1156 wrote to memory of 4048	1156	bufvgdwp.exe	svchost.exe
PID 1156 wrote to memory of 4048	1156	bufvgdwp.exe	svchost.exe
PID 1156 wrote to memory of 4048	1156	bufvgdwp.exe	svchost.exe
PID 1156 wrote to memory of 4048	1156	bufvgdwp.exe	svchost.exe
PID 1156 wrote to memory of 4048	1156	bufvgdwp.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe
"C:\Users\Admin\AppData\Local\Temp\c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2068
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\wzgywhy\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4156
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\bufvgdwp.exe" C:\Windows\SysWOW64\wzgywhy\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:5020
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create wzgywhy binPath= "C:\Windows\SysWOW64\wzgywhy\bufvgdwp.exe /d\"C:\Users\Admin\AppData\Local\Temp\c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3188
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description wzgywhy "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3964
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start wzgywhy
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1572
- 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:2088
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2068 -s 776
  2⤵
  - Program crash
  PID:1760

C:\Windows\SysWOW64\wzgywhy\bufvgdwp.exe
C:\Windows\SysWOW64\wzgywhy\bufvgdwp.exe /d"C:\Users\Admin\AppData\Local\Temp\c8b505762941917003a601f5528107f2f8430f28ba872d46402ae0e2072f73d0.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1156
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4048
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1156 -s 532
  2⤵
  - Program crash
  PID:1912

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 2068 -ip 2068
1⤵
PID:2740

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 1156 -ip 1156
1⤵
PID:956

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

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

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
14.8MB

MD5
b54f170bce6daac400842434ee104e61

SHA1
27c2e22bdfb51ebffcce9cef54f7c39b41d89313

SHA256
6d8b06ac33d41e3e0aaa5e993c7c5f2c70e8ae9219ffbbc69b28ecdb64e9486b

SHA512
7173139bc01ee7277ded1b804f3757490c2890cf19be4574839e63f9b34879278440c8ef82bf0cd85a495648e4bf37ef3e91f3ef07015c3e6b8746cad9312b64

Download Submit
memory/1156-11-0x0000000000400000-0x000000000076F000-memory.dmp

Filesize
3.4MB

Download
memory/1156-17-0x0000000000400000-0x000000000076F000-memory.dmp

Filesize
3.4MB

Download
memory/2068-2-0x00000000008D0000-0x00000000008E3000-memory.dmp

Filesize
76KB

Download
memory/2068-1-0x0000000000940000-0x0000000000A40000-memory.dmp

Filesize
1024KB

Download
memory/2068-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2068-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2068-9-0x00000000008D0000-0x00000000008E3000-memory.dmp

Filesize
76KB

Download
memory/2068-8-0x0000000000400000-0x000000000076F000-memory.dmp

Filesize
3.4MB

Download
memory/4048-12-0x0000000000710000-0x0000000000725000-memory.dmp

Filesize
84KB

Download
memory/4048-14-0x0000000000710000-0x0000000000725000-memory.dmp

Filesize
84KB

Download
memory/4048-15-0x0000000000710000-0x0000000000725000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads