tofsee | 1a903641c19c3ad59cab959bc483c5205e3e5dd5bf0a81656260046f1258673a

General

Target

2025-02-01_8ecbe3f21f57e180898bfdb126d5abc8_mafia.exe
Size

10.2MB
MD5

8ecbe3f21f57e180898bfdb126d5abc8
SHA1

4269353815b8b5417c0c52597b61f13df64c4a37
SHA256

1a903641c19c3ad59cab959bc483c5205e3e5dd5bf0a81656260046f1258673a
SHA512

0836d9fe5e5a5466bdbc4d6abd354d92b2d9d66201ec3d35493be6ea5ec95ea0249b0f0f4018cfb04152e441e7212cd5cbef07aa7ca4d3c3f8b64fef7ed31751
SSDEEP

24576:BpomTTN9tttttttttttttttttttttttttttttttttttttttttttttttttttttttq:booU

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
1988	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\yvhaktbl\ImagePath = "C:\\Windows\\SysWOW64\\yvhaktbl\\viurkxcm.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-1-5-21-1121399784-3202166597-3503557106-1000\Control Panel\International\Geo\Nation	2025-02-01_8ecbe3f21f57e180898bfdb126d5abc8_mafia.exe

Deletes itself 1 IoCs

pid	Process
2580	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
5088	viurkxcm.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5088 set thread context of 2580	5088	viurkxcm.exe	102

Launches sc.exe 3 IoCs

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

pid	Process
2176	sc.exe
4516	sc.exe
1660	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
4012	4916	WerFault.exe	82
2692	5088	WerFault.exe	96

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	viurkxcm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2025-02-01_8ecbe3f21f57e180898bfdb126d5abc8_mafia.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

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4916 wrote to memory of 5072	4916	2025-02-01_8ecbe3f21f57e180898bfdb126d5abc8_mafia.exe	86
PID 4916 wrote to memory of 5072	4916	2025-02-01_8ecbe3f21f57e180898bfdb126d5abc8_mafia.exe	86
PID 4916 wrote to memory of 5072	4916	2025-02-01_8ecbe3f21f57e180898bfdb126d5abc8_mafia.exe	86
PID 4916 wrote to memory of 2356	4916	2025-02-01_8ecbe3f21f57e180898bfdb126d5abc8_mafia.exe	88
PID 4916 wrote to memory of 2356	4916	2025-02-01_8ecbe3f21f57e180898bfdb126d5abc8_mafia.exe	88
PID 4916 wrote to memory of 2356	4916	2025-02-01_8ecbe3f21f57e180898bfdb126d5abc8_mafia.exe	88
PID 4916 wrote to memory of 2176	4916	2025-02-01_8ecbe3f21f57e180898bfdb126d5abc8_mafia.exe	90
PID 4916 wrote to memory of 2176	4916	2025-02-01_8ecbe3f21f57e180898bfdb126d5abc8_mafia.exe	90
PID 4916 wrote to memory of 2176	4916	2025-02-01_8ecbe3f21f57e180898bfdb126d5abc8_mafia.exe	90
PID 4916 wrote to memory of 4516	4916	2025-02-01_8ecbe3f21f57e180898bfdb126d5abc8_mafia.exe	92
PID 4916 wrote to memory of 4516	4916	2025-02-01_8ecbe3f21f57e180898bfdb126d5abc8_mafia.exe	92
PID 4916 wrote to memory of 4516	4916	2025-02-01_8ecbe3f21f57e180898bfdb126d5abc8_mafia.exe	92
PID 4916 wrote to memory of 1660	4916	2025-02-01_8ecbe3f21f57e180898bfdb126d5abc8_mafia.exe	94
PID 4916 wrote to memory of 1660	4916	2025-02-01_8ecbe3f21f57e180898bfdb126d5abc8_mafia.exe	94
PID 4916 wrote to memory of 1660	4916	2025-02-01_8ecbe3f21f57e180898bfdb126d5abc8_mafia.exe	94
PID 4916 wrote to memory of 1988	4916	2025-02-01_8ecbe3f21f57e180898bfdb126d5abc8_mafia.exe	97
PID 4916 wrote to memory of 1988	4916	2025-02-01_8ecbe3f21f57e180898bfdb126d5abc8_mafia.exe	97
PID 4916 wrote to memory of 1988	4916	2025-02-01_8ecbe3f21f57e180898bfdb126d5abc8_mafia.exe	97
PID 5088 wrote to memory of 2580	5088	viurkxcm.exe	102
PID 5088 wrote to memory of 2580	5088	viurkxcm.exe	102
PID 5088 wrote to memory of 2580	5088	viurkxcm.exe	102
PID 5088 wrote to memory of 2580	5088	viurkxcm.exe	102
PID 5088 wrote to memory of 2580	5088	viurkxcm.exe	102

C:\Users\Admin\AppData\Local\Temp\2025-02-01_8ecbe3f21f57e180898bfdb126d5abc8_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2025-02-01_8ecbe3f21f57e180898bfdb126d5abc8_mafia.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4916
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\yvhaktbl\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:5072
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\viurkxcm.exe" C:\Windows\SysWOW64\yvhaktbl\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2356
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create yvhaktbl binPath= "C:\Windows\SysWOW64\yvhaktbl\viurkxcm.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-02-01_8ecbe3f21f57e180898bfdb126d5abc8_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2176
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description yvhaktbl "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4516
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start yvhaktbl
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1660
- 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:1988
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4916 -s 888
  2⤵
  - Program crash
  PID:4012

C:\Windows\SysWOW64\yvhaktbl\viurkxcm.exe
C:\Windows\SysWOW64\yvhaktbl\viurkxcm.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-02-01_8ecbe3f21f57e180898bfdb126d5abc8_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5088
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2580
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5088 -s 512
  2⤵
  - Program crash
  PID:2692

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 4916 -ip 4916
1⤵
PID:3868

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 5088 -ip 5088
1⤵
PID:3036

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

Replay Monitor

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Downloads

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

Filesize
12.6MB

MD5
6e59ddf37ef9c74f4be8476ab96432d1

SHA1
7fa1c64e0e2b405cafb77e676efe4a1895623228

SHA256
6a9cd7c08d735710bc1d8c012aefddf1175e84ee1be1118b4c2c314f7efd48c9

SHA512
659598c4ce7ef5cbd56f8fc244a6d4130240bfdd0b65cc00a45b6fb4c9f15af9eb084fb78097549aa599a45dd34fc4b0b8600430a2eb967df770089b89826a87

Download Submit
memory/2580-16-0x0000000000660000-0x0000000000675000-memory.dmp

Filesize
84KB

Download
memory/2580-17-0x0000000000660000-0x0000000000675000-memory.dmp

Filesize
84KB

Download
memory/2580-14-0x0000000000660000-0x0000000000675000-memory.dmp

Filesize
84KB

Download
memory/4916-8-0x0000000000690000-0x00000000006A3000-memory.dmp

Filesize
76KB

Download
memory/4916-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4916-1-0x0000000000710000-0x0000000000810000-memory.dmp

Filesize
1024KB

Download
memory/4916-7-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/4916-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4916-2-0x0000000000690000-0x00000000006A3000-memory.dmp

Filesize
76KB

Download
memory/5088-11-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/5088-12-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/5088-13-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/5088-18-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads