tofsee | 1f599c7159a4c57afcc1e115852376aea64faf946cda5bd7580dd0e54517286b

General

Target

2025-04-04_3c6b7f9e39a3b566d35f65967f7c76a0_black-basta_luca-stealer.exe
Size

14.5MB
MD5

3c6b7f9e39a3b566d35f65967f7c76a0
SHA1

afc942d25e9e50b659c09acb2e44791b1b7a326c
SHA256

1f599c7159a4c57afcc1e115852376aea64faf946cda5bd7580dd0e54517286b
SHA512

5ea654503fd93cc90454fadf8334bd6bd5efbc0b98135e533472df678059becde64ac2c6327d16a61f358615d9a8e4188bec8debb83b9f6fdc2898dacd34fabe
SSDEEP

49152:t/LuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuO:t

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
5096	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\nnnkzaja\ImagePath = "C:\\Windows\\SysWOW64\\nnnkzaja\\sjfmdcgk.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-1-5-21-814918696-1585701690-3140955116-1000\Control Panel\International\Geo\Nation	2025-04-04_3c6b7f9e39a3b566d35f65967f7c76a0_black-basta_luca-stealer.exe

Deletes itself 1 IoCs

pid	Process
4988	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3696	sjfmdcgk.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3696 set thread context of 4988	3696	sjfmdcgk.exe	124

Launches sc.exe 3 IoCs

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

pid	Process
2148	sc.exe
5964	sc.exe
4984	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
4000	1796	WerFault.exe	87
5316	3696	WerFault.exe	109

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_3c6b7f9e39a3b566d35f65967f7c76a0_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	svchost.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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sjfmdcgk.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1796 wrote to memory of 4932	1796	2025-04-04_3c6b7f9e39a3b566d35f65967f7c76a0_black-basta_luca-stealer.exe	99
PID 1796 wrote to memory of 4932	1796	2025-04-04_3c6b7f9e39a3b566d35f65967f7c76a0_black-basta_luca-stealer.exe	99
PID 1796 wrote to memory of 4932	1796	2025-04-04_3c6b7f9e39a3b566d35f65967f7c76a0_black-basta_luca-stealer.exe	99
PID 1796 wrote to memory of 2360	1796	2025-04-04_3c6b7f9e39a3b566d35f65967f7c76a0_black-basta_luca-stealer.exe	101
PID 1796 wrote to memory of 2360	1796	2025-04-04_3c6b7f9e39a3b566d35f65967f7c76a0_black-basta_luca-stealer.exe	101
PID 1796 wrote to memory of 2360	1796	2025-04-04_3c6b7f9e39a3b566d35f65967f7c76a0_black-basta_luca-stealer.exe	101
PID 1796 wrote to memory of 4984	1796	2025-04-04_3c6b7f9e39a3b566d35f65967f7c76a0_black-basta_luca-stealer.exe	103
PID 1796 wrote to memory of 4984	1796	2025-04-04_3c6b7f9e39a3b566d35f65967f7c76a0_black-basta_luca-stealer.exe	103
PID 1796 wrote to memory of 4984	1796	2025-04-04_3c6b7f9e39a3b566d35f65967f7c76a0_black-basta_luca-stealer.exe	103
PID 1796 wrote to memory of 2148	1796	2025-04-04_3c6b7f9e39a3b566d35f65967f7c76a0_black-basta_luca-stealer.exe	105
PID 1796 wrote to memory of 2148	1796	2025-04-04_3c6b7f9e39a3b566d35f65967f7c76a0_black-basta_luca-stealer.exe	105
PID 1796 wrote to memory of 2148	1796	2025-04-04_3c6b7f9e39a3b566d35f65967f7c76a0_black-basta_luca-stealer.exe	105
PID 1796 wrote to memory of 5964	1796	2025-04-04_3c6b7f9e39a3b566d35f65967f7c76a0_black-basta_luca-stealer.exe	107
PID 1796 wrote to memory of 5964	1796	2025-04-04_3c6b7f9e39a3b566d35f65967f7c76a0_black-basta_luca-stealer.exe	107
PID 1796 wrote to memory of 5964	1796	2025-04-04_3c6b7f9e39a3b566d35f65967f7c76a0_black-basta_luca-stealer.exe	107
PID 1796 wrote to memory of 5096	1796	2025-04-04_3c6b7f9e39a3b566d35f65967f7c76a0_black-basta_luca-stealer.exe	110
PID 1796 wrote to memory of 5096	1796	2025-04-04_3c6b7f9e39a3b566d35f65967f7c76a0_black-basta_luca-stealer.exe	110
PID 1796 wrote to memory of 5096	1796	2025-04-04_3c6b7f9e39a3b566d35f65967f7c76a0_black-basta_luca-stealer.exe	110
PID 3696 wrote to memory of 4988	3696	sjfmdcgk.exe	124
PID 3696 wrote to memory of 4988	3696	sjfmdcgk.exe	124
PID 3696 wrote to memory of 4988	3696	sjfmdcgk.exe	124
PID 3696 wrote to memory of 4988	3696	sjfmdcgk.exe	124
PID 3696 wrote to memory of 4988	3696	sjfmdcgk.exe	124

C:\Users\Admin\AppData\Local\Temp\2025-04-04_3c6b7f9e39a3b566d35f65967f7c76a0_black-basta_luca-stealer.exe
"C:\Users\Admin\AppData\Local\Temp\2025-04-04_3c6b7f9e39a3b566d35f65967f7c76a0_black-basta_luca-stealer.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1796
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\nnnkzaja\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4932
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\sjfmdcgk.exe" C:\Windows\SysWOW64\nnnkzaja\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2360
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create nnnkzaja binPath= "C:\Windows\SysWOW64\nnnkzaja\sjfmdcgk.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-04-04_3c6b7f9e39a3b566d35f65967f7c76a0_black-basta_luca-stealer.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4984
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description nnnkzaja "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2148
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start nnnkzaja
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:5964
- 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:5096
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1796 -s 1036
  2⤵
  - Program crash
  PID:4000

C:\Windows\SysWOW64\nnnkzaja\sjfmdcgk.exe
C:\Windows\SysWOW64\nnnkzaja\sjfmdcgk.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-04-04_3c6b7f9e39a3b566d35f65967f7c76a0_black-basta_luca-stealer.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3696
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4988
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3696 -s 536
  2⤵
  - Program crash
  PID:5316

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 1796 -ip 1796
1⤵
PID:2564

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 3696 -ip 3696
1⤵
PID:920

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\sjfmdcgk.exe

Filesize
12.0MB

MD5
b1a1da2b41c7108cb1915e68990e1669

SHA1
d11e4a8f25cf6f1b04b11b1b213148e9f102f235

SHA256
bfad203fa92dc6ae4b55ec9a8ad3ee119a22bbea35d50389308c8e672e4f1884

SHA512
65bccf83e8dcfd7c9d485a142e345d94aa5a40974317c72aa521e18f9b725d39a8b344970c64af9c3c6b512bf5c866191127350af13128076a3d81e663d9613e

Download Submit
memory/1796-12-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1796-3-0x0000000003540000-0x0000000003553000-memory.dmp

Filesize
76KB

Download
memory/1796-4-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1796-2-0x00000000035E0000-0x00000000036E0000-memory.dmp

Filesize
1024KB

Download
memory/1796-7-0x0000000000400000-0x00000000033A9000-memory.dmp

Filesize
47.7MB

Download
memory/1796-11-0x0000000003540000-0x0000000003553000-memory.dmp

Filesize
76KB

Download
memory/1796-10-0x0000000000400000-0x00000000033A9000-memory.dmp

Filesize
47.7MB

Download
memory/1796-0-0x0000000000400000-0x00000000033A9000-memory.dmp

Filesize
47.7MB

Download
memory/3696-9-0x0000000000400000-0x00000000033A9000-memory.dmp

Filesize
47.7MB

Download
memory/3696-19-0x0000000000400000-0x00000000033A9000-memory.dmp

Filesize
47.7MB

Download
memory/4988-14-0x00000000008D0000-0x00000000008E5000-memory.dmp

Filesize
84KB

Download
memory/4988-16-0x00000000008D0000-0x00000000008E5000-memory.dmp

Filesize
84KB

Download
memory/4988-17-0x00000000008D0000-0x00000000008E5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads