tofsee | 603f6cbb18c0253ad73d52cf235f38be4bda4f3286e0a13bd65dfb769fb74619

General

Target

2025-04-04_1dec88a9b86093b618e7e077758fbcbb_black-basta_luca-stealer.exe
Size

14.9MB
MD5

1dec88a9b86093b618e7e077758fbcbb
SHA1

fdd4acbbb8665306ff9b04895793b4195c495c24
SHA256

603f6cbb18c0253ad73d52cf235f38be4bda4f3286e0a13bd65dfb769fb74619
SHA512

8f517bc6c07d0dfd7f6fc4d461bdb6adcd1760d09e88a07b43af0180fb63e3a340dbf606cfd18a2d56cecf113d3b3f49b83be554666101f68b928f3a2db4447c
SSDEEP

3072:dl3t+DDATZKP7Ny5Da8nlGAYSjmhpsb9i1UjQJP+Xn2Dg7NVXewtwtwtwtwtwtwu:dzyeKP7qa8VmhpspedP+X2Dg7H

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
4084	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\kkbbyafy\ImagePath = "C:\\Windows\\SysWOW64\\kkbbyafy\\tnnepypr.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_1dec88a9b86093b618e7e077758fbcbb_black-basta_luca-stealer.exe

Deletes itself 1 IoCs

pid	Process
5100	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
5048	tnnepypr.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5048 set thread context of 5100	5048	tnnepypr.exe	103

Launches sc.exe 3 IoCs

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

pid	Process
4692	sc.exe
5008	sc.exe
5344	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 4 IoCs

pid	pid_target	Process	procid_target
5396	5048	WerFault.exe	100
4576	5048	WerFault.exe	100
408	5048	WerFault.exe	100
2884	3600	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	netsh.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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tnnepypr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2025-04-04_1dec88a9b86093b618e7e077758fbcbb_black-basta_luca-stealer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3600 wrote to memory of 5364	3600	2025-04-04_1dec88a9b86093b618e7e077758fbcbb_black-basta_luca-stealer.exe	89
PID 3600 wrote to memory of 5364	3600	2025-04-04_1dec88a9b86093b618e7e077758fbcbb_black-basta_luca-stealer.exe	89
PID 3600 wrote to memory of 5364	3600	2025-04-04_1dec88a9b86093b618e7e077758fbcbb_black-basta_luca-stealer.exe	89
PID 3600 wrote to memory of 392	3600	2025-04-04_1dec88a9b86093b618e7e077758fbcbb_black-basta_luca-stealer.exe	91
PID 3600 wrote to memory of 392	3600	2025-04-04_1dec88a9b86093b618e7e077758fbcbb_black-basta_luca-stealer.exe	91
PID 3600 wrote to memory of 392	3600	2025-04-04_1dec88a9b86093b618e7e077758fbcbb_black-basta_luca-stealer.exe	91
PID 3600 wrote to memory of 4692	3600	2025-04-04_1dec88a9b86093b618e7e077758fbcbb_black-basta_luca-stealer.exe	93
PID 3600 wrote to memory of 4692	3600	2025-04-04_1dec88a9b86093b618e7e077758fbcbb_black-basta_luca-stealer.exe	93
PID 3600 wrote to memory of 4692	3600	2025-04-04_1dec88a9b86093b618e7e077758fbcbb_black-basta_luca-stealer.exe	93
PID 3600 wrote to memory of 5008	3600	2025-04-04_1dec88a9b86093b618e7e077758fbcbb_black-basta_luca-stealer.exe	96
PID 3600 wrote to memory of 5008	3600	2025-04-04_1dec88a9b86093b618e7e077758fbcbb_black-basta_luca-stealer.exe	96
PID 3600 wrote to memory of 5008	3600	2025-04-04_1dec88a9b86093b618e7e077758fbcbb_black-basta_luca-stealer.exe	96
PID 3600 wrote to memory of 5344	3600	2025-04-04_1dec88a9b86093b618e7e077758fbcbb_black-basta_luca-stealer.exe	98
PID 3600 wrote to memory of 5344	3600	2025-04-04_1dec88a9b86093b618e7e077758fbcbb_black-basta_luca-stealer.exe	98
PID 3600 wrote to memory of 5344	3600	2025-04-04_1dec88a9b86093b618e7e077758fbcbb_black-basta_luca-stealer.exe	98
PID 5048 wrote to memory of 5100	5048	tnnepypr.exe	103
PID 5048 wrote to memory of 5100	5048	tnnepypr.exe	103
PID 5048 wrote to memory of 5100	5048	tnnepypr.exe	103
PID 5048 wrote to memory of 5100	5048	tnnepypr.exe	103
PID 5048 wrote to memory of 5100	5048	tnnepypr.exe	103
PID 3600 wrote to memory of 4084	3600	2025-04-04_1dec88a9b86093b618e7e077758fbcbb_black-basta_luca-stealer.exe	110
PID 3600 wrote to memory of 4084	3600	2025-04-04_1dec88a9b86093b618e7e077758fbcbb_black-basta_luca-stealer.exe	110
PID 3600 wrote to memory of 4084	3600	2025-04-04_1dec88a9b86093b618e7e077758fbcbb_black-basta_luca-stealer.exe	110

C:\Users\Admin\AppData\Local\Temp\2025-04-04_1dec88a9b86093b618e7e077758fbcbb_black-basta_luca-stealer.exe
"C:\Users\Admin\AppData\Local\Temp\2025-04-04_1dec88a9b86093b618e7e077758fbcbb_black-basta_luca-stealer.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3600
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\kkbbyafy\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:5364
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\tnnepypr.exe" C:\Windows\SysWOW64\kkbbyafy\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:392
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create kkbbyafy binPath= "C:\Windows\SysWOW64\kkbbyafy\tnnepypr.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-04-04_1dec88a9b86093b618e7e077758fbcbb_black-basta_luca-stealer.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4692
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description kkbbyafy "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:5008
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start kkbbyafy
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:5344
- 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:4084
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3600 -s 656
  2⤵
  - Program crash
  PID:2884

C:\Windows\SysWOW64\kkbbyafy\tnnepypr.exe
C:\Windows\SysWOW64\kkbbyafy\tnnepypr.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-04-04_1dec88a9b86093b618e7e077758fbcbb_black-basta_luca-stealer.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5048
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:5100
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5048 -s 516
  2⤵
  - Program crash
  PID:5396
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5048 -s 528
  2⤵
  - Program crash
  PID:4576
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5048 -s 556
  2⤵
  - Program crash
  PID:408

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 5048 -ip 5048
1⤵
PID:5476

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 5048 -ip 5048
1⤵
PID:4528

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 5048 -ip 5048
1⤵
PID:3980

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 512 -p 3600 -ip 3600
1⤵
PID:3968

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\tnnepypr.exe

Filesize
14.1MB

MD5
9f3b06099ee2ed6f98dabf18c5f277a3

SHA1
426d5ce3a032934332166701da762590de1f422c

SHA256
ff595132c249467aea21fa3f97e17973751507044703b8902a98d50389b5b0ef

SHA512
93449fb611f672fe41866b1462fa3512e0ce0ab8d20b027785fe4937c9f52f98c583ad57091971bc2eb8bdf84ce28c55440b8faf77981c60e6557c1d9599e762

Download Submit
memory/3600-1-0x00000000005C0000-0x00000000006C0000-memory.dmp

Filesize
1024KB

Download
memory/3600-2-0x0000000000520000-0x0000000000533000-memory.dmp

Filesize
76KB

Download
memory/3600-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3600-17-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3600-19-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3600-18-0x0000000000520000-0x0000000000533000-memory.dmp

Filesize
76KB

Download
memory/5048-8-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/5048-9-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/5048-16-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/5048-10-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/5100-11-0x0000000001040000-0x0000000001055000-memory.dmp

Filesize
84KB

Download
memory/5100-14-0x0000000001040000-0x0000000001055000-memory.dmp

Filesize
84KB

Download
memory/5100-20-0x0000000001040000-0x0000000001055000-memory.dmp

Filesize
84KB

Download
memory/5100-21-0x0000000001040000-0x0000000001055000-memory.dmp

Filesize
84KB

Download
memory/5100-22-0x0000000001040000-0x0000000001055000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads