tofsee | 58dfe37377079346222270d2adad6cb3bb539f24762d16c763b653ba3d32d9be

General

Target

2025-04-04_8ab641ca62cc4ffb9f4af60643ab7bb9_black-basta_luca-stealer.exe
Size

12.5MB
MD5

8ab641ca62cc4ffb9f4af60643ab7bb9
SHA1

b7bc4c9eca112a673aec6fcf26ccffb19dc3c9ee
SHA256

58dfe37377079346222270d2adad6cb3bb539f24762d16c763b653ba3d32d9be
SHA512

ba7f19662d04babe59e5bbe91d7efc6328fc048b811172f9b9134176a83a4e6c0605833441acb9793361dfc74612f44bb18c1eb1836a037c3db846677d3d8dab
SSDEEP

6144:Gx0+o7WWIsIrMhYUhxAeg4PgOHOrDnbvZFpkGgtTpiHqqqqqqqqqqqqqqqqqqqq8:Gx3o7WWb1Zgag8w7f8

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
4032	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\xbmhqsyo\ImagePath = "C:\\Windows\\SysWOW64\\xbmhqsyo\\yatelthx.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-1-5-21-805952410-2104024357-1716932545-1000\Control Panel\International\Geo\Nation	2025-04-04_8ab641ca62cc4ffb9f4af60643ab7bb9_black-basta_luca-stealer.exe

Deletes itself 1 IoCs

pid	Process
4908	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1992	yatelthx.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1992 set thread context of 4908	1992	yatelthx.exe	102

Launches sc.exe 3 IoCs

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

pid	Process
1708	sc.exe
4060	sc.exe
2260	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
1564	1992	WerFault.exe	99
2312	4900	WerFault.exe	85

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_8ab641ca62cc4ffb9f4af60643ab7bb9_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
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	yatelthx.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4900 wrote to memory of 4964	4900	2025-04-04_8ab641ca62cc4ffb9f4af60643ab7bb9_black-basta_luca-stealer.exe	87
PID 4900 wrote to memory of 4964	4900	2025-04-04_8ab641ca62cc4ffb9f4af60643ab7bb9_black-basta_luca-stealer.exe	87
PID 4900 wrote to memory of 4964	4900	2025-04-04_8ab641ca62cc4ffb9f4af60643ab7bb9_black-basta_luca-stealer.exe	87
PID 4900 wrote to memory of 4656	4900	2025-04-04_8ab641ca62cc4ffb9f4af60643ab7bb9_black-basta_luca-stealer.exe	91
PID 4900 wrote to memory of 4656	4900	2025-04-04_8ab641ca62cc4ffb9f4af60643ab7bb9_black-basta_luca-stealer.exe	91
PID 4900 wrote to memory of 4656	4900	2025-04-04_8ab641ca62cc4ffb9f4af60643ab7bb9_black-basta_luca-stealer.exe	91
PID 4900 wrote to memory of 1708	4900	2025-04-04_8ab641ca62cc4ffb9f4af60643ab7bb9_black-basta_luca-stealer.exe	93
PID 4900 wrote to memory of 1708	4900	2025-04-04_8ab641ca62cc4ffb9f4af60643ab7bb9_black-basta_luca-stealer.exe	93
PID 4900 wrote to memory of 1708	4900	2025-04-04_8ab641ca62cc4ffb9f4af60643ab7bb9_black-basta_luca-stealer.exe	93
PID 4900 wrote to memory of 4060	4900	2025-04-04_8ab641ca62cc4ffb9f4af60643ab7bb9_black-basta_luca-stealer.exe	95
PID 4900 wrote to memory of 4060	4900	2025-04-04_8ab641ca62cc4ffb9f4af60643ab7bb9_black-basta_luca-stealer.exe	95
PID 4900 wrote to memory of 4060	4900	2025-04-04_8ab641ca62cc4ffb9f4af60643ab7bb9_black-basta_luca-stealer.exe	95
PID 4900 wrote to memory of 2260	4900	2025-04-04_8ab641ca62cc4ffb9f4af60643ab7bb9_black-basta_luca-stealer.exe	97
PID 4900 wrote to memory of 2260	4900	2025-04-04_8ab641ca62cc4ffb9f4af60643ab7bb9_black-basta_luca-stealer.exe	97
PID 4900 wrote to memory of 2260	4900	2025-04-04_8ab641ca62cc4ffb9f4af60643ab7bb9_black-basta_luca-stealer.exe	97
PID 1992 wrote to memory of 4908	1992	yatelthx.exe	102
PID 1992 wrote to memory of 4908	1992	yatelthx.exe	102
PID 1992 wrote to memory of 4908	1992	yatelthx.exe	102
PID 1992 wrote to memory of 4908	1992	yatelthx.exe	102
PID 1992 wrote to memory of 4908	1992	yatelthx.exe	102
PID 4900 wrote to memory of 4032	4900	2025-04-04_8ab641ca62cc4ffb9f4af60643ab7bb9_black-basta_luca-stealer.exe	106
PID 4900 wrote to memory of 4032	4900	2025-04-04_8ab641ca62cc4ffb9f4af60643ab7bb9_black-basta_luca-stealer.exe	106
PID 4900 wrote to memory of 4032	4900	2025-04-04_8ab641ca62cc4ffb9f4af60643ab7bb9_black-basta_luca-stealer.exe	106

C:\Users\Admin\AppData\Local\Temp\2025-04-04_8ab641ca62cc4ffb9f4af60643ab7bb9_black-basta_luca-stealer.exe
"C:\Users\Admin\AppData\Local\Temp\2025-04-04_8ab641ca62cc4ffb9f4af60643ab7bb9_black-basta_luca-stealer.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4900
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\xbmhqsyo\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4964
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\yatelthx.exe" C:\Windows\SysWOW64\xbmhqsyo\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4656
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create xbmhqsyo binPath= "C:\Windows\SysWOW64\xbmhqsyo\yatelthx.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-04-04_8ab641ca62cc4ffb9f4af60643ab7bb9_black-basta_luca-stealer.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1708
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description xbmhqsyo "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4060
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start xbmhqsyo
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2260
- 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:4032
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4900 -s 1044
  2⤵
  - Program crash
  PID:2312

C:\Windows\SysWOW64\xbmhqsyo\yatelthx.exe
C:\Windows\SysWOW64\xbmhqsyo\yatelthx.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-04-04_8ab641ca62cc4ffb9f4af60643ab7bb9_black-basta_luca-stealer.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1992
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4908
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1992 -s 512
  2⤵
  - Program crash
  PID:1564

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 1992 -ip 1992
1⤵
PID:3760

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 4900 -ip 4900
1⤵
PID:1320

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\yatelthx.exe

Filesize
11.2MB

MD5
f5835f7dba01a53648652b69766b6793

SHA1
e69ef786e209a2d66551ef5c0fb3d22379fd5e9e

SHA256
58676c099124f436615c73801878bc1ebae417ab35a01cd2e85b3b7a4b39e98f

SHA512
e23994ba3ab00d7d7780052402610392e29aa7bad365d38d3a60471589a72e1f425c0e6b10d44cc5d4c1066733e7b9eaa78ba101e0838cd3af93d829fee78494

Download Submit
memory/1992-8-0x0000000000400000-0x000000000047A000-memory.dmp

Filesize
488KB

Download
memory/1992-17-0x0000000000400000-0x000000000047A000-memory.dmp

Filesize
488KB

Download
memory/1992-11-0x0000000000400000-0x000000000047A000-memory.dmp

Filesize
488KB

Download
memory/1992-10-0x0000000000400000-0x000000000047A000-memory.dmp

Filesize
488KB

Download
memory/4900-21-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4900-4-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4900-3-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/4900-15-0x00000000006F0000-0x00000000007F0000-memory.dmp

Filesize
1024KB

Download
memory/4900-2-0x00000000006F0000-0x00000000007F0000-memory.dmp

Filesize
1024KB

Download
memory/4900-0-0x0000000000400000-0x000000000047A000-memory.dmp

Filesize
488KB

Download
memory/4900-20-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/4900-19-0x0000000000400000-0x000000000047A000-memory.dmp

Filesize
488KB

Download
memory/4908-12-0x0000000001060000-0x0000000001075000-memory.dmp

Filesize
84KB

Download
memory/4908-16-0x0000000001060000-0x0000000001075000-memory.dmp

Filesize
84KB

Download
memory/4908-22-0x0000000001060000-0x0000000001075000-memory.dmp

Filesize
84KB

Download
memory/4908-23-0x0000000001060000-0x0000000001075000-memory.dmp

Filesize
84KB

Download
memory/4908-24-0x0000000001060000-0x0000000001075000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads