tofsee | 6542df9290b0e3312e5c6d143461b5258901597514b7cb3aed1280c8271041eb

General

Target

2025-03-30_44060047c09b10a66899ce012387c5c3_black-basta_luca-stealer_smoke-loader.exe
Size

13.9MB
MD5

44060047c09b10a66899ce012387c5c3
SHA1

d7f0f95a1f168c74dcf2109e280d3da40af6f904
SHA256

6542df9290b0e3312e5c6d143461b5258901597514b7cb3aed1280c8271041eb
SHA512

d1258de502f4b38d3aee82ab8f978e9593e85f5b222ea05a9558fa1515b5e622daf08b8e936439c274a5c59242ec75c15df63f5d3580afcf56af31c8e73568ae
SSDEEP

3072:AZnbTHQC2mC+vdVcQuHAGSr9viHWhPxO796t6B7Aw5S2FxmEBVrVrVrVrVrVrVrb:UnJjcngGSrlqFp6kCyxTT

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
464	netsh.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	2025-03-30_44060047c09b10a66899ce012387c5c3_black-basta_luca-stealer_smoke-loader.exe

Executes dropped EXE 1 IoCs

pid	Process
3672	bkejbavr.exe

Launches sc.exe 3 IoCs

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

pid	Process
4472	sc.exe
2260	sc.exe
2132	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 1 IoCs

pid	pid_target	Process	procid_target
1848	5088	WerFault.exe	85

System Location Discovery: System Language Discovery 1 TTPs 7 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	2025-03-30_44060047c09b10a66899ce012387c5c3_black-basta_luca-stealer_smoke-loader.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	netsh.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 5088 wrote to memory of 2836	5088	2025-03-30_44060047c09b10a66899ce012387c5c3_black-basta_luca-stealer_smoke-loader.exe	105
PID 5088 wrote to memory of 2836	5088	2025-03-30_44060047c09b10a66899ce012387c5c3_black-basta_luca-stealer_smoke-loader.exe	105
PID 5088 wrote to memory of 2836	5088	2025-03-30_44060047c09b10a66899ce012387c5c3_black-basta_luca-stealer_smoke-loader.exe	105
PID 5088 wrote to memory of 3340	5088	2025-03-30_44060047c09b10a66899ce012387c5c3_black-basta_luca-stealer_smoke-loader.exe	107
PID 5088 wrote to memory of 3340	5088	2025-03-30_44060047c09b10a66899ce012387c5c3_black-basta_luca-stealer_smoke-loader.exe	107
PID 5088 wrote to memory of 3340	5088	2025-03-30_44060047c09b10a66899ce012387c5c3_black-basta_luca-stealer_smoke-loader.exe	107
PID 5088 wrote to memory of 4472	5088	2025-03-30_44060047c09b10a66899ce012387c5c3_black-basta_luca-stealer_smoke-loader.exe	109
PID 5088 wrote to memory of 4472	5088	2025-03-30_44060047c09b10a66899ce012387c5c3_black-basta_luca-stealer_smoke-loader.exe	109
PID 5088 wrote to memory of 4472	5088	2025-03-30_44060047c09b10a66899ce012387c5c3_black-basta_luca-stealer_smoke-loader.exe	109
PID 5088 wrote to memory of 2260	5088	2025-03-30_44060047c09b10a66899ce012387c5c3_black-basta_luca-stealer_smoke-loader.exe	111
PID 5088 wrote to memory of 2260	5088	2025-03-30_44060047c09b10a66899ce012387c5c3_black-basta_luca-stealer_smoke-loader.exe	111
PID 5088 wrote to memory of 2260	5088	2025-03-30_44060047c09b10a66899ce012387c5c3_black-basta_luca-stealer_smoke-loader.exe	111
PID 5088 wrote to memory of 2132	5088	2025-03-30_44060047c09b10a66899ce012387c5c3_black-basta_luca-stealer_smoke-loader.exe	114
PID 5088 wrote to memory of 2132	5088	2025-03-30_44060047c09b10a66899ce012387c5c3_black-basta_luca-stealer_smoke-loader.exe	114
PID 5088 wrote to memory of 2132	5088	2025-03-30_44060047c09b10a66899ce012387c5c3_black-basta_luca-stealer_smoke-loader.exe	114
PID 5088 wrote to memory of 464	5088	2025-03-30_44060047c09b10a66899ce012387c5c3_black-basta_luca-stealer_smoke-loader.exe	117
PID 5088 wrote to memory of 464	5088	2025-03-30_44060047c09b10a66899ce012387c5c3_black-basta_luca-stealer_smoke-loader.exe	117
PID 5088 wrote to memory of 464	5088	2025-03-30_44060047c09b10a66899ce012387c5c3_black-basta_luca-stealer_smoke-loader.exe	117

C:\Users\Admin\AppData\Local\Temp\2025-03-30_44060047c09b10a66899ce012387c5c3_black-basta_luca-stealer_smoke-loader.exe
"C:\Users\Admin\AppData\Local\Temp\2025-03-30_44060047c09b10a66899ce012387c5c3_black-basta_luca-stealer_smoke-loader.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5088
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hjrwwusf\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2836
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\bkejbavr.exe" C:\Windows\SysWOW64\hjrwwusf\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3340
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create hjrwwusf binPath= "C:\Windows\SysWOW64\hjrwwusf\bkejbavr.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-03-30_44060047c09b10a66899ce012387c5c3_black-basta_luca-stealer_smoke-loader.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4472
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description hjrwwusf "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2260
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start hjrwwusf
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2132
- 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:464
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5088 -s 1036
  2⤵
  - Program crash
  PID:1848

C:\Windows\SysWOW64\hjrwwusf\bkejbavr.exe
C:\Windows\SysWOW64\hjrwwusf\bkejbavr.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-03-30_44060047c09b10a66899ce012387c5c3_black-basta_luca-stealer_smoke-loader.exe"
1⤵
- Executes dropped EXE
PID:3672

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 5088 -ip 5088
1⤵
PID:3012

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

1

T1569

Service Execution

1

T1569.002

Persistence

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

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

1

T1562.004

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\bkejbavr.exe

Filesize
10.6MB

MD5
2912040313a0c7e40f34b449e0d17819

SHA1
e34ae008b8e9bb275b5808cbdbee23f8bef4465b

SHA256
e88b2e6471e61d18ceff6d44574ce783d8d65e3b0dbf7c7b92a8810b0664815f

SHA512
7125eb30896b064a53f8f00acd20e84cbf8e87a8407b98e4d15df5bbe351ee87ec32f9dfc75b1a67f758a05d074f19fd4a76ba27d9301723c6638d5cf00ad95a

Download Submit
memory/5088-1-0x0000000000770000-0x0000000000870000-memory.dmp

Filesize
1024KB

Download
memory/5088-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/5088-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/5088-7-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download
memory/5088-8-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/5088-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads