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
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

3648 netsh.exe

pid	process
3648	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\yxwzvbvv\ImagePath = "C:\\Windows\\SysWOW64\\yxwzvbvv\\gvwcpaut.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:

72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

1112 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

gvwcpaut.exe

pid process

1088 gvwcpaut.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

gvwcpaut.exe

description pid process target process

PID 1088 set thread context of 1112 1088 gvwcpaut.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

3556 sc.exe
4032 sc.exe
4616 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
1112	svchost.exe

pid	process
1088	gvwcpaut.exe

description	pid	process	target process
PID 1088 set thread context of 1112	1088	gvwcpaut.exe	svchost.exe

pid	process
3556	sc.exe
4032	sc.exe
4616	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

Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid	pid_target	process	target process
536	1864	WerFault.exe	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe
4008	1088	WerFault.exe	gvwcpaut.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:

netsh.exegvwcpaut.exesc.execmd.execmd.exesc.exesc.exesvchost.exe72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe

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

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exegvwcpaut.exe

description	pid	process	target process
PID 1864 wrote to memory of 3864	1864	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe	cmd.exe
PID 1864 wrote to memory of 3864	1864	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe	cmd.exe
PID 1864 wrote to memory of 3864	1864	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe	cmd.exe
PID 1864 wrote to memory of 4900	1864	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe	cmd.exe
PID 1864 wrote to memory of 4900	1864	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe	cmd.exe
PID 1864 wrote to memory of 4900	1864	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe	cmd.exe
PID 1864 wrote to memory of 4032	1864	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe	sc.exe
PID 1864 wrote to memory of 4032	1864	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe	sc.exe
PID 1864 wrote to memory of 4032	1864	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe	sc.exe
PID 1864 wrote to memory of 4616	1864	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe	sc.exe
PID 1864 wrote to memory of 4616	1864	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe	sc.exe
PID 1864 wrote to memory of 4616	1864	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe	sc.exe
PID 1864 wrote to memory of 3556	1864	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe	sc.exe
PID 1864 wrote to memory of 3556	1864	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe	sc.exe
PID 1864 wrote to memory of 3556	1864	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe	sc.exe
PID 1864 wrote to memory of 3648	1864	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe	netsh.exe
PID 1864 wrote to memory of 3648	1864	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe	netsh.exe
PID 1864 wrote to memory of 3648	1864	72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe	netsh.exe
PID 1088 wrote to memory of 1112	1088	gvwcpaut.exe	svchost.exe
PID 1088 wrote to memory of 1112	1088	gvwcpaut.exe	svchost.exe
PID 1088 wrote to memory of 1112	1088	gvwcpaut.exe	svchost.exe
PID 1088 wrote to memory of 1112	1088	gvwcpaut.exe	svchost.exe
PID 1088 wrote to memory of 1112	1088	gvwcpaut.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe
"C:\Users\Admin\AppData\Local\Temp\72f4ceffca45d742bc1d5aaac96c81e9f80abc4c1aa6e1a0b3c810a327d5fe35.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1864
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\yxwzvbvv\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3864
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gvwcpaut.exe" C:\Windows\SysWOW64\yxwzvbvv\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4900
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create yxwzvbvv binPath= "C:\Windows\SysWOW64\yxwzvbvv\gvwcpaut.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:4032
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description yxwzvbvv "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4616
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start yxwzvbvv
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3556
- 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:3648
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1864 -s 1292
  2⤵
  - Program crash
  PID:536

C:\Windows\SysWOW64\yxwzvbvv\gvwcpaut.exe
C:\Windows\SysWOW64\yxwzvbvv\gvwcpaut.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:1088
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:1112
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1088 -s 516
  2⤵
  - Program crash
  PID:4008

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 1864 -ip 1864
1⤵
PID:724

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 1088 -ip 1088
1⤵
PID:1464

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

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Downloads

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

Filesize
12.0MB

MD5
59ce71865386ffa41acdaefae0a661ed

SHA1
14a4a158d2f52278a9cb4440d6f9326c8d54f51a

SHA256
be7d6f798d08ffa0f761ff131988796a58cf6a20aed8d2b63e442f5377de63b7

SHA512
1cb0e1ded0722b63ba5f8117aecb6ed0b2a72dbd4bf9ba4b29bd99afbef4b758bb56af73c3391811b7ce5dcfe205065dbf9bdab6146d7a818fc3571dab051b64

Download Submit
memory/1088-15-0x0000000000400000-0x0000000002F11000-memory.dmp

Filesize
43.1MB

Download
memory/1112-14-0x0000000000640000-0x0000000000655000-memory.dmp

Filesize
84KB

Download
memory/1112-13-0x0000000000640000-0x0000000000655000-memory.dmp

Filesize
84KB

Download
memory/1112-11-0x0000000000640000-0x0000000000655000-memory.dmp

Filesize
84KB

Download
memory/1864-2-0x0000000003280000-0x0000000003293000-memory.dmp

Filesize
76KB

Download
memory/1864-1-0x00000000032A0000-0x00000000033A0000-memory.dmp

Filesize
1024KB

Download
memory/1864-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1864-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1864-9-0x0000000003280000-0x0000000003293000-memory.dmp

Filesize
76KB

Download
memory/1864-8-0x0000000000400000-0x0000000002F11000-memory.dmp

Filesize
43.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads