tofsee | 3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c

General

Target

3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe
Size

10.4MB
MD5

e710572b1e69a2bc8b423bf5f30a091a
SHA1

f424c5674d79282be1e26e317a2e5e3dc6073723
SHA256

3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c
SHA512

c1a40ce3c71d54543b0606033e495fa1fd012da923d9ffd954eda2361998c0955246ebea80cac202e73b303fc0d370216aed33a2531469d9d659fdf3829cbe59
SSDEEP

196608:Exxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx7:K

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

pid	Process
1328	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\vrhikhqm\ImagePath = "C:\\Windows\\SysWOW64\\vrhikhqm\\xgpxldlu.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-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe

Deletes itself 1 IoCs

pid	Process
5092	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4824	xgpxldlu.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4824 set thread context of 5092	4824	xgpxldlu.exe	102

Launches sc.exe 3 IoCs

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

pid	Process
984	sc.exe
3784	sc.exe
1652	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 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

Program crash 2 IoCs

pid	pid_target	Process	procid_target
3264	1656	WerFault.exe	80
1552	4824	WerFault.exe	95

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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	xgpxldlu.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.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	netsh.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1656 wrote to memory of 3504	1656	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	83
PID 1656 wrote to memory of 3504	1656	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	83
PID 1656 wrote to memory of 3504	1656	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	83
PID 1656 wrote to memory of 3732	1656	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	87
PID 1656 wrote to memory of 3732	1656	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	87
PID 1656 wrote to memory of 3732	1656	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	87
PID 1656 wrote to memory of 984	1656	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	89
PID 1656 wrote to memory of 984	1656	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	89
PID 1656 wrote to memory of 984	1656	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	89
PID 1656 wrote to memory of 3784	1656	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	91
PID 1656 wrote to memory of 3784	1656	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	91
PID 1656 wrote to memory of 3784	1656	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	91
PID 1656 wrote to memory of 1652	1656	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	93
PID 1656 wrote to memory of 1652	1656	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	93
PID 1656 wrote to memory of 1652	1656	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	93
PID 1656 wrote to memory of 1328	1656	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	96
PID 1656 wrote to memory of 1328	1656	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	96
PID 1656 wrote to memory of 1328	1656	3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe	96
PID 4824 wrote to memory of 5092	4824	xgpxldlu.exe	102
PID 4824 wrote to memory of 5092	4824	xgpxldlu.exe	102
PID 4824 wrote to memory of 5092	4824	xgpxldlu.exe	102
PID 4824 wrote to memory of 5092	4824	xgpxldlu.exe	102
PID 4824 wrote to memory of 5092	4824	xgpxldlu.exe	102

C:\Users\Admin\AppData\Local\Temp\3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe
"C:\Users\Admin\AppData\Local\Temp\3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1656
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vrhikhqm\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3504
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\xgpxldlu.exe" C:\Windows\SysWOW64\vrhikhqm\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3732
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create vrhikhqm binPath= "C:\Windows\SysWOW64\vrhikhqm\xgpxldlu.exe /d\"C:\Users\Admin\AppData\Local\Temp\3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:984
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description vrhikhqm "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3784
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start vrhikhqm
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1652
- 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:1328
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1656 -s 588
  2⤵
  - Program crash
  PID:3264

C:\Windows\SysWOW64\vrhikhqm\xgpxldlu.exe
C:\Windows\SysWOW64\vrhikhqm\xgpxldlu.exe /d"C:\Users\Admin\AppData\Local\Temp\3edff9e579c6eae2369399704d30bd0b67fc8dee8400c1a64c48bd0561864d6c.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4824
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:5092
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4824 -s 520
  2⤵
  - Program crash
  PID:1552

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 1656 -ip 1656
1⤵
PID:444

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 4824 -ip 4824
1⤵
PID:3152

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\xgpxldlu.exe

Filesize
13.1MB

MD5
275aa88446677017546c3f023a059a13

SHA1
de9da3071412f3c6eccd6bc32fa3a79b032344f6

SHA256
61af2e8af3e247473b824fd85959394755785a5a9d970c91c8b830ac4a6a717e

SHA512
783aba73724daa991464e8b4d1f297fe5dbc7efe1f2f9159d87ccecbc24e2acb83917fe6f0a603ea90f1798b4c3339446d3b731e9f5060f8b50c79a0d5333c13

Download Submit
memory/1656-0-0x0000000004C40000-0x0000000004C4D000-memory.dmp

Filesize
52KB

Download
memory/1656-1-0x0000000004C50000-0x0000000004C63000-memory.dmp

Filesize
76KB

Download
memory/1656-2-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1656-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1656-8-0x0000000004C50000-0x0000000004C63000-memory.dmp

Filesize
76KB

Download
memory/1656-7-0x0000000004C40000-0x0000000004C4D000-memory.dmp

Filesize
52KB

Download
memory/1656-6-0x0000000000400000-0x0000000002F06000-memory.dmp

Filesize
43.0MB

Download
memory/4824-14-0x0000000000400000-0x0000000002F06000-memory.dmp

Filesize
43.0MB

Download
memory/5092-10-0x0000000000760000-0x0000000000775000-memory.dmp

Filesize
84KB

Download
memory/5092-12-0x0000000000760000-0x0000000000775000-memory.dmp

Filesize
84KB

Download
memory/5092-13-0x0000000000760000-0x0000000000775000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads