tofsee | bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794

General

Target

bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe
Size

10.0MB
MD5

e73ea7459977529317345e65c0f15267
SHA1

345f6930733b34578650cb65168ee93aa45457eb
SHA256

bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794
SHA512

1e89c8bac3fbfe785d271ba48680b50c259438b7816429b6dfa5d976fc46276a4749c837576667fac90249e50182691d52cee0d11b6d8ef1db97dedcf16113f0
SSDEEP

49152:bkHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHP:I

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
1512	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\hiqbffqy\ImagePath = "C:\\Windows\\SysWOW64\\hiqbffqy\\zmvstykx.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-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe

Deletes itself 1 IoCs

pid	Process
2324	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3996	zmvstykx.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3996 set thread context of 2324	3996	zmvstykx.exe	107

Launches sc.exe 3 IoCs

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

pid	Process
3100	sc.exe
3032	sc.exe
3388	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
2756	3820	WerFault.exe	82
1104	3996	WerFault.exe	100

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	bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	zmvstykx.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3820 wrote to memory of 4780	3820	bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe	83
PID 3820 wrote to memory of 4780	3820	bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe	83
PID 3820 wrote to memory of 4780	3820	bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe	83
PID 3820 wrote to memory of 2272	3820	bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe	87
PID 3820 wrote to memory of 2272	3820	bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe	87
PID 3820 wrote to memory of 2272	3820	bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe	87
PID 3820 wrote to memory of 3100	3820	bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe	90
PID 3820 wrote to memory of 3100	3820	bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe	90
PID 3820 wrote to memory of 3100	3820	bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe	90
PID 3820 wrote to memory of 3032	3820	bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe	96
PID 3820 wrote to memory of 3032	3820	bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe	96
PID 3820 wrote to memory of 3032	3820	bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe	96
PID 3820 wrote to memory of 3388	3820	bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe	98
PID 3820 wrote to memory of 3388	3820	bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe	98
PID 3820 wrote to memory of 3388	3820	bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe	98
PID 3820 wrote to memory of 1512	3820	bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe	101
PID 3820 wrote to memory of 1512	3820	bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe	101
PID 3820 wrote to memory of 1512	3820	bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe	101
PID 3996 wrote to memory of 2324	3996	zmvstykx.exe	107
PID 3996 wrote to memory of 2324	3996	zmvstykx.exe	107
PID 3996 wrote to memory of 2324	3996	zmvstykx.exe	107
PID 3996 wrote to memory of 2324	3996	zmvstykx.exe	107
PID 3996 wrote to memory of 2324	3996	zmvstykx.exe	107

C:\Users\Admin\AppData\Local\Temp\bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe
"C:\Users\Admin\AppData\Local\Temp\bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3820
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hiqbffqy\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4780
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\zmvstykx.exe" C:\Windows\SysWOW64\hiqbffqy\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2272
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create hiqbffqy binPath= "C:\Windows\SysWOW64\hiqbffqy\zmvstykx.exe /d\"C:\Users\Admin\AppData\Local\Temp\bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3100
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description hiqbffqy "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3032
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start hiqbffqy
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3388
- 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:1512
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3820 -s 1168
  2⤵
  - Program crash
  PID:2756

C:\Windows\SysWOW64\hiqbffqy\zmvstykx.exe
C:\Windows\SysWOW64\hiqbffqy\zmvstykx.exe /d"C:\Users\Admin\AppData\Local\Temp\bce3694725d1ffe6c07fdfaa7b72f20ae3b458bbd713bcb12aa6f0692d1f4794.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3996
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2324
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3996 -s 516
  2⤵
  - Program crash
  PID:1104

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 3820 -ip 3820
1⤵
PID:2804

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 3996 -ip 3996
1⤵
PID:4876

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\zmvstykx.exe

Filesize
14.1MB

MD5
4b3633f713b2281c3d3cebd11308510b

SHA1
adf500238c69458a3f3bda60d5288f581b6d7e24

SHA256
6c3c1bc26dfb7ca2323e2e1b6a84211aec887063b970e05a8f30229c75979f3b

SHA512
bd6673b6d1ae262a08cfe8d38d0cf4e8c1226e596baa732d3065cf8dde84bb709f27beb591833045be79f04b88ba0457955e95a147569e5c099f953741aa2447

Download Submit
memory/2324-12-0x0000000000140000-0x0000000000155000-memory.dmp

Filesize
84KB

Download
memory/2324-14-0x0000000000140000-0x0000000000155000-memory.dmp

Filesize
84KB

Download
memory/2324-15-0x0000000000140000-0x0000000000155000-memory.dmp

Filesize
84KB

Download
memory/3820-1-0x00000000009E0000-0x0000000000AE0000-memory.dmp

Filesize
1024KB

Download
memory/3820-2-0x0000000000930000-0x0000000000943000-memory.dmp

Filesize
76KB

Download
memory/3820-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3820-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3820-9-0x0000000000930000-0x0000000000943000-memory.dmp

Filesize
76KB

Download
memory/3820-8-0x0000000000400000-0x0000000000785000-memory.dmp

Filesize
3.5MB

Download
memory/3996-11-0x0000000000400000-0x0000000000785000-memory.dmp

Filesize
3.5MB

Download
memory/3996-17-0x0000000000400000-0x0000000000785000-memory.dmp

Filesize
3.5MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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