tofsee | 5ea9b15b646c6304171c9d34449073332c6a22f780f6946588c4f266260b65c7

General

Target

2025-04-04_848ac202b7452558d4b1ae14a77fbb8c_black-basta_luca-stealer.exe
Size

10.0MB
MD5

848ac202b7452558d4b1ae14a77fbb8c
SHA1

3fdf2e6e38ade48a8944e99bdacf22aec6a7a73e
SHA256

5ea9b15b646c6304171c9d34449073332c6a22f780f6946588c4f266260b65c7
SHA512

f9b9aed63f0c3c5833d00b3ddd5bda1f172cae98e9c7361d7d35043d88f3ec44503549cb620b08cd5a7de819537fe26e236491086edb7b4fc998410baadbdf27
SSDEEP

49152:L/LuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuP:L

Score

10^/10

tofsee defense_evasion discovery execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

43.231.4.7

lazystax.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

defense_evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
3384	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\puvdkjw\ImagePath = "C:\\Windows\\SysWOW64\\puvdkjw\\viurkxcm.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-1-5-21-446031748-3036493239-2009529691-1000\Control Panel\International\Geo\Nation	2025-04-04_848ac202b7452558d4b1ae14a77fbb8c_black-basta_luca-stealer.exe

Deletes itself 1 IoCs

pid	Process
1540	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2400	viurkxcm.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2400 set thread context of 1540	2400	viurkxcm.exe	120

Launches sc.exe 3 IoCs

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

pid	Process
3628	sc.exe
4672	sc.exe
4896	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
3604	2236	WerFault.exe	84
2860	2400	WerFault.exe	105

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	2025-04-04_848ac202b7452558d4b1ae14a77fbb8c_black-basta_luca-stealer.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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	viurkxcm.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 2236 wrote to memory of 4652	2236	2025-04-04_848ac202b7452558d4b1ae14a77fbb8c_black-basta_luca-stealer.exe	95
PID 2236 wrote to memory of 4652	2236	2025-04-04_848ac202b7452558d4b1ae14a77fbb8c_black-basta_luca-stealer.exe	95
PID 2236 wrote to memory of 4652	2236	2025-04-04_848ac202b7452558d4b1ae14a77fbb8c_black-basta_luca-stealer.exe	95
PID 2236 wrote to memory of 4748	2236	2025-04-04_848ac202b7452558d4b1ae14a77fbb8c_black-basta_luca-stealer.exe	97
PID 2236 wrote to memory of 4748	2236	2025-04-04_848ac202b7452558d4b1ae14a77fbb8c_black-basta_luca-stealer.exe	97
PID 2236 wrote to memory of 4748	2236	2025-04-04_848ac202b7452558d4b1ae14a77fbb8c_black-basta_luca-stealer.exe	97
PID 2236 wrote to memory of 4672	2236	2025-04-04_848ac202b7452558d4b1ae14a77fbb8c_black-basta_luca-stealer.exe	99
PID 2236 wrote to memory of 4672	2236	2025-04-04_848ac202b7452558d4b1ae14a77fbb8c_black-basta_luca-stealer.exe	99
PID 2236 wrote to memory of 4672	2236	2025-04-04_848ac202b7452558d4b1ae14a77fbb8c_black-basta_luca-stealer.exe	99
PID 2236 wrote to memory of 4896	2236	2025-04-04_848ac202b7452558d4b1ae14a77fbb8c_black-basta_luca-stealer.exe	101
PID 2236 wrote to memory of 4896	2236	2025-04-04_848ac202b7452558d4b1ae14a77fbb8c_black-basta_luca-stealer.exe	101
PID 2236 wrote to memory of 4896	2236	2025-04-04_848ac202b7452558d4b1ae14a77fbb8c_black-basta_luca-stealer.exe	101
PID 2236 wrote to memory of 3628	2236	2025-04-04_848ac202b7452558d4b1ae14a77fbb8c_black-basta_luca-stealer.exe	103
PID 2236 wrote to memory of 3628	2236	2025-04-04_848ac202b7452558d4b1ae14a77fbb8c_black-basta_luca-stealer.exe	103
PID 2236 wrote to memory of 3628	2236	2025-04-04_848ac202b7452558d4b1ae14a77fbb8c_black-basta_luca-stealer.exe	103
PID 2236 wrote to memory of 3384	2236	2025-04-04_848ac202b7452558d4b1ae14a77fbb8c_black-basta_luca-stealer.exe	106
PID 2236 wrote to memory of 3384	2236	2025-04-04_848ac202b7452558d4b1ae14a77fbb8c_black-basta_luca-stealer.exe	106
PID 2236 wrote to memory of 3384	2236	2025-04-04_848ac202b7452558d4b1ae14a77fbb8c_black-basta_luca-stealer.exe	106
PID 2400 wrote to memory of 1540	2400	viurkxcm.exe	120
PID 2400 wrote to memory of 1540	2400	viurkxcm.exe	120
PID 2400 wrote to memory of 1540	2400	viurkxcm.exe	120
PID 2400 wrote to memory of 1540	2400	viurkxcm.exe	120
PID 2400 wrote to memory of 1540	2400	viurkxcm.exe	120

C:\Users\Admin\AppData\Local\Temp\2025-04-04_848ac202b7452558d4b1ae14a77fbb8c_black-basta_luca-stealer.exe
"C:\Users\Admin\AppData\Local\Temp\2025-04-04_848ac202b7452558d4b1ae14a77fbb8c_black-basta_luca-stealer.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2236
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\puvdkjw\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4652
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\viurkxcm.exe" C:\Windows\SysWOW64\puvdkjw\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4748
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create puvdkjw binPath= "C:\Windows\SysWOW64\puvdkjw\viurkxcm.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-04-04_848ac202b7452558d4b1ae14a77fbb8c_black-basta_luca-stealer.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4672
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description puvdkjw "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4896
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start puvdkjw
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3628
- 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:3384
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2236 -s 1200
  2⤵
  - Program crash
  PID:3604

C:\Windows\SysWOW64\puvdkjw\viurkxcm.exe
C:\Windows\SysWOW64\puvdkjw\viurkxcm.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-04-04_848ac202b7452558d4b1ae14a77fbb8c_black-basta_luca-stealer.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2400
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:1540
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2400 -s 508
  2⤵
  - Program crash
  PID:2860

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 2236 -ip 2236
1⤵
PID:3368

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 492 -p 2400 -ip 2400
1⤵
PID:1608

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\viurkxcm.exe

Filesize
12.0MB

MD5
6f84f57e5d525eed3aa2073ade589282

SHA1
7264060184d508f57118bcd6019b8b77b18b1084

SHA256
76cb8964287ad153c39fe3e054f43b205656fd6a32773356ecacb5cce5a63dc6

SHA512
05b69a8eee98cf25cb6412bfce4f43c50903f4cf26bd4fa9ed6bd0f3deafcbdcb91b32b54325df2f7d8ef4d6b09fd8f4f791506d6ae5e01971b4e1b276b08511

Download Submit
memory/1540-16-0x0000000000820000-0x0000000000835000-memory.dmp

Filesize
84KB

Download
memory/1540-15-0x0000000000820000-0x0000000000835000-memory.dmp

Filesize
84KB

Download
memory/1540-13-0x0000000000820000-0x0000000000835000-memory.dmp

Filesize
84KB

Download
memory/2236-4-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2236-10-0x0000000004FA0000-0x0000000004FB3000-memory.dmp

Filesize
76KB

Download
memory/2236-9-0x0000000000400000-0x00000000033A9000-memory.dmp

Filesize
47.7MB

Download
memory/2236-11-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2236-0-0x0000000000400000-0x00000000033A9000-memory.dmp

Filesize
47.7MB

Download
memory/2236-3-0x0000000004FA0000-0x0000000004FB3000-memory.dmp

Filesize
76KB

Download
memory/2236-2-0x00000000035E0000-0x00000000036E0000-memory.dmp

Filesize
1024KB

Download
memory/2400-8-0x0000000000400000-0x00000000033A9000-memory.dmp

Filesize
47.7MB

Download
memory/2400-18-0x0000000000400000-0x00000000033A9000-memory.dmp

Filesize
47.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads