tofsee | 00f0baa85e6ff72bae73389b37b84171bc0bb4f8b599fc58afaa65578f16e793

General

Target

2025-03-30_f5d41f5e256ffe9d02a1c075ef203801_black-basta_luca-stealer.exe
Size

11.1MB
MD5

f5d41f5e256ffe9d02a1c075ef203801
SHA1

4fe639d7a221b0d7a2453b35656b378eb9a4bc10
SHA256

00f0baa85e6ff72bae73389b37b84171bc0bb4f8b599fc58afaa65578f16e793
SHA512

3f878feaa54111c9978cd29e2d0a9bd2f1df920747462ebe9d78f6d55a5318c3d14f48411919be81af643afba780db55c3a43e99f8754b6d042244c14095e754
SSDEEP

12288:3QvccP/JGo5IdddddddddddddddddddddddddddddddddddddddddddddddddddV:gvcMAQY

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
4208	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\bqtewtsv\ImagePath = "C:\\Windows\\SysWOW64\\bqtewtsv\\wudenjyu.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-1-5-21-83325578-304917428-1200496059-1000\Control Panel\International\Geo\Nation	2025-03-30_f5d41f5e256ffe9d02a1c075ef203801_black-basta_luca-stealer.exe

Deletes itself 1 IoCs

pid	Process
5096	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
5364	wudenjyu.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5364 set thread context of 5096	5364	wudenjyu.exe	102

Launches sc.exe 3 IoCs

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

pid	Process
4936	sc.exe
3512	sc.exe
1636	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
2308	408	WerFault.exe	85
1724	5364	WerFault.exe	101

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	wudenjyu.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2025-03-30_f5d41f5e256ffe9d02a1c075ef203801_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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 408 wrote to memory of 900	408	2025-03-30_f5d41f5e256ffe9d02a1c075ef203801_black-basta_luca-stealer.exe	88
PID 408 wrote to memory of 900	408	2025-03-30_f5d41f5e256ffe9d02a1c075ef203801_black-basta_luca-stealer.exe	88
PID 408 wrote to memory of 900	408	2025-03-30_f5d41f5e256ffe9d02a1c075ef203801_black-basta_luca-stealer.exe	88
PID 408 wrote to memory of 2952	408	2025-03-30_f5d41f5e256ffe9d02a1c075ef203801_black-basta_luca-stealer.exe	91
PID 408 wrote to memory of 2952	408	2025-03-30_f5d41f5e256ffe9d02a1c075ef203801_black-basta_luca-stealer.exe	91
PID 408 wrote to memory of 2952	408	2025-03-30_f5d41f5e256ffe9d02a1c075ef203801_black-basta_luca-stealer.exe	91
PID 408 wrote to memory of 4936	408	2025-03-30_f5d41f5e256ffe9d02a1c075ef203801_black-basta_luca-stealer.exe	93
PID 408 wrote to memory of 4936	408	2025-03-30_f5d41f5e256ffe9d02a1c075ef203801_black-basta_luca-stealer.exe	93
PID 408 wrote to memory of 4936	408	2025-03-30_f5d41f5e256ffe9d02a1c075ef203801_black-basta_luca-stealer.exe	93
PID 408 wrote to memory of 3512	408	2025-03-30_f5d41f5e256ffe9d02a1c075ef203801_black-basta_luca-stealer.exe	95
PID 408 wrote to memory of 3512	408	2025-03-30_f5d41f5e256ffe9d02a1c075ef203801_black-basta_luca-stealer.exe	95
PID 408 wrote to memory of 3512	408	2025-03-30_f5d41f5e256ffe9d02a1c075ef203801_black-basta_luca-stealer.exe	95
PID 408 wrote to memory of 1636	408	2025-03-30_f5d41f5e256ffe9d02a1c075ef203801_black-basta_luca-stealer.exe	99
PID 408 wrote to memory of 1636	408	2025-03-30_f5d41f5e256ffe9d02a1c075ef203801_black-basta_luca-stealer.exe	99
PID 408 wrote to memory of 1636	408	2025-03-30_f5d41f5e256ffe9d02a1c075ef203801_black-basta_luca-stealer.exe	99
PID 5364 wrote to memory of 5096	5364	wudenjyu.exe	102
PID 5364 wrote to memory of 5096	5364	wudenjyu.exe	102
PID 5364 wrote to memory of 5096	5364	wudenjyu.exe	102
PID 5364 wrote to memory of 5096	5364	wudenjyu.exe	102
PID 5364 wrote to memory of 5096	5364	wudenjyu.exe	102
PID 408 wrote to memory of 4208	408	2025-03-30_f5d41f5e256ffe9d02a1c075ef203801_black-basta_luca-stealer.exe	104
PID 408 wrote to memory of 4208	408	2025-03-30_f5d41f5e256ffe9d02a1c075ef203801_black-basta_luca-stealer.exe	104
PID 408 wrote to memory of 4208	408	2025-03-30_f5d41f5e256ffe9d02a1c075ef203801_black-basta_luca-stealer.exe	104

C:\Users\Admin\AppData\Local\Temp\2025-03-30_f5d41f5e256ffe9d02a1c075ef203801_black-basta_luca-stealer.exe
"C:\Users\Admin\AppData\Local\Temp\2025-03-30_f5d41f5e256ffe9d02a1c075ef203801_black-basta_luca-stealer.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:408
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\bqtewtsv\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:900
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\wudenjyu.exe" C:\Windows\SysWOW64\bqtewtsv\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2952
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create bqtewtsv binPath= "C:\Windows\SysWOW64\bqtewtsv\wudenjyu.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-03-30_f5d41f5e256ffe9d02a1c075ef203801_black-basta_luca-stealer.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4936
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description bqtewtsv "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3512
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start bqtewtsv
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1636
- 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:4208
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 408 -s 1196
  2⤵
  - Program crash
  PID:2308

C:\Windows\SysWOW64\bqtewtsv\wudenjyu.exe
C:\Windows\SysWOW64\bqtewtsv\wudenjyu.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-03-30_f5d41f5e256ffe9d02a1c075ef203801_black-basta_luca-stealer.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5364
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:5096
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5364 -s 528
  2⤵
  - Program crash
  PID:1724

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 408 -ip 408
1⤵
PID:2860

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 5364 -ip 5364
1⤵
PID:2700

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\wudenjyu.exe

Filesize
13.4MB

MD5
75440d968bdf833fa25bd381bac463fb

SHA1
d97acd28d83f2f213dcb64eea47d34b1421b6d7a

SHA256
f38de8438dd8b4487b366b1853cac4dac36135dde354660666177178a09875d3

SHA512
4fb93dc243964d75d1bb1053f94cbf40be99fa5c92d37aa12d704db7762dfd82667975a9cd8befa3fa0ba0535a7d5e65057fda9d39f31ab85c2b39298d61f5f5

Download Submit
memory/408-18-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/408-2-0x00000000005F0000-0x0000000000603000-memory.dmp

Filesize
76KB

Download
memory/408-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/408-1-0x00000000006C0000-0x00000000007C0000-memory.dmp

Filesize
1024KB

Download
memory/408-17-0x00000000005F0000-0x0000000000603000-memory.dmp

Filesize
76KB

Download
memory/408-16-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/5096-19-0x0000000000FC0000-0x0000000000FD5000-memory.dmp

Filesize
84KB

Download
memory/5096-21-0x0000000000FC0000-0x0000000000FD5000-memory.dmp

Filesize
84KB

Download
memory/5096-10-0x0000000000FC0000-0x0000000000FD5000-memory.dmp

Filesize
84KB

Download
memory/5096-13-0x0000000000FC0000-0x0000000000FD5000-memory.dmp

Filesize
84KB

Download
memory/5096-20-0x0000000000FC0000-0x0000000000FD5000-memory.dmp

Filesize
84KB

Download
memory/5364-9-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/5364-15-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/5364-8-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads