tofsee | b4dd7e958b282c99443e852936d95871d0cf9646870203656bf2d19a97eee09b

General

Target

2025-02-01_98cdee498f8d5733b1c652d8cf791cf1_mafia.exe
Size

11.2MB
MD5

98cdee498f8d5733b1c652d8cf791cf1
SHA1

80bb484e8eb3bbcd1b45f46594094def3cb2b599
SHA256

b4dd7e958b282c99443e852936d95871d0cf9646870203656bf2d19a97eee09b
SHA512

2dce27d3172ed2bdc64fc35bfdb63074e90fd56c04a5ca99586262c38b40c35cd12603b26769fd3ecaf1dacf9f974da2823023fa57e4c7550c0a7b4715860355
SSDEEP

24576:kEfmTNIkv/ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZV:Bfot

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
3800	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\xndiklen\ImagePath = "C:\\Windows\\SysWOW64\\xndiklen\\nnozuvtb.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-1-5-21-805940606-1861219160-370298170-1000\Control Panel\International\Geo\Nation	2025-02-01_98cdee498f8d5733b1c652d8cf791cf1_mafia.exe

Deletes itself 1 IoCs

pid	Process
4804	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4672	nnozuvtb.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4672 set thread context of 4804	4672	nnozuvtb.exe	102

Launches sc.exe 3 IoCs

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

pid	Process
2900	sc.exe
1028	sc.exe
3016	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
1648	3192	WerFault.exe	82
4788	4672	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	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	nnozuvtb.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2025-02-01_98cdee498f8d5733b1c652d8cf791cf1_mafia.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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	netsh.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3192 wrote to memory of 2884	3192	2025-02-01_98cdee498f8d5733b1c652d8cf791cf1_mafia.exe	86
PID 3192 wrote to memory of 2884	3192	2025-02-01_98cdee498f8d5733b1c652d8cf791cf1_mafia.exe	86
PID 3192 wrote to memory of 2884	3192	2025-02-01_98cdee498f8d5733b1c652d8cf791cf1_mafia.exe	86
PID 3192 wrote to memory of 2068	3192	2025-02-01_98cdee498f8d5733b1c652d8cf791cf1_mafia.exe	88
PID 3192 wrote to memory of 2068	3192	2025-02-01_98cdee498f8d5733b1c652d8cf791cf1_mafia.exe	88
PID 3192 wrote to memory of 2068	3192	2025-02-01_98cdee498f8d5733b1c652d8cf791cf1_mafia.exe	88
PID 3192 wrote to memory of 3016	3192	2025-02-01_98cdee498f8d5733b1c652d8cf791cf1_mafia.exe	90
PID 3192 wrote to memory of 3016	3192	2025-02-01_98cdee498f8d5733b1c652d8cf791cf1_mafia.exe	90
PID 3192 wrote to memory of 3016	3192	2025-02-01_98cdee498f8d5733b1c652d8cf791cf1_mafia.exe	90
PID 3192 wrote to memory of 2900	3192	2025-02-01_98cdee498f8d5733b1c652d8cf791cf1_mafia.exe	92
PID 3192 wrote to memory of 2900	3192	2025-02-01_98cdee498f8d5733b1c652d8cf791cf1_mafia.exe	92
PID 3192 wrote to memory of 2900	3192	2025-02-01_98cdee498f8d5733b1c652d8cf791cf1_mafia.exe	92
PID 3192 wrote to memory of 1028	3192	2025-02-01_98cdee498f8d5733b1c652d8cf791cf1_mafia.exe	94
PID 3192 wrote to memory of 1028	3192	2025-02-01_98cdee498f8d5733b1c652d8cf791cf1_mafia.exe	94
PID 3192 wrote to memory of 1028	3192	2025-02-01_98cdee498f8d5733b1c652d8cf791cf1_mafia.exe	94
PID 3192 wrote to memory of 3800	3192	2025-02-01_98cdee498f8d5733b1c652d8cf791cf1_mafia.exe	97
PID 3192 wrote to memory of 3800	3192	2025-02-01_98cdee498f8d5733b1c652d8cf791cf1_mafia.exe	97
PID 3192 wrote to memory of 3800	3192	2025-02-01_98cdee498f8d5733b1c652d8cf791cf1_mafia.exe	97
PID 4672 wrote to memory of 4804	4672	nnozuvtb.exe	102
PID 4672 wrote to memory of 4804	4672	nnozuvtb.exe	102
PID 4672 wrote to memory of 4804	4672	nnozuvtb.exe	102
PID 4672 wrote to memory of 4804	4672	nnozuvtb.exe	102
PID 4672 wrote to memory of 4804	4672	nnozuvtb.exe	102

C:\Users\Admin\AppData\Local\Temp\2025-02-01_98cdee498f8d5733b1c652d8cf791cf1_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2025-02-01_98cdee498f8d5733b1c652d8cf791cf1_mafia.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3192
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\xndiklen\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2884
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\nnozuvtb.exe" C:\Windows\SysWOW64\xndiklen\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2068
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create xndiklen binPath= "C:\Windows\SysWOW64\xndiklen\nnozuvtb.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-02-01_98cdee498f8d5733b1c652d8cf791cf1_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3016
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description xndiklen "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2900
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start xndiklen
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1028
- 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:3800
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3192 -s 1184
  2⤵
  - Program crash
  PID:1648

C:\Windows\SysWOW64\xndiklen\nnozuvtb.exe
C:\Windows\SysWOW64\xndiklen\nnozuvtb.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-02-01_98cdee498f8d5733b1c652d8cf791cf1_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4672
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4804
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4672 -s 560
  2⤵
  - Program crash
  PID:4788

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 3192 -ip 3192
1⤵
PID:4832

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 4672 -ip 4672
1⤵
PID:4844

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\nnozuvtb.exe

Filesize
14.7MB

MD5
fee4acdd84aba9b73dfba736ced52073

SHA1
e6865b42d0c7eab0ca3d4740528196122bee9cff

SHA256
394f2311a3540f5c20abda736891029b4680c180ece2eed429bd95da846abaa3

SHA512
a5066c1662fb5317269afd712150999173984dfb74687c7373ecfcc3fc65f89241225d0152e9d628a3d6814ba8e548da8443ef38ae028d181fb30e46b317467f

Download Submit
memory/3192-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3192-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3192-2-0x0000000000890000-0x00000000008A3000-memory.dmp

Filesize
76KB

Download
memory/3192-7-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/3192-8-0x0000000000890000-0x00000000008A3000-memory.dmp

Filesize
76KB

Download
memory/3192-1-0x0000000000690000-0x0000000000790000-memory.dmp

Filesize
1024KB

Download
memory/4672-12-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/4672-11-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/4672-13-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/4672-18-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/4804-14-0x00000000003C0000-0x00000000003D5000-memory.dmp

Filesize
84KB

Download
memory/4804-16-0x00000000003C0000-0x00000000003D5000-memory.dmp

Filesize
84KB

Download
memory/4804-17-0x00000000003C0000-0x00000000003D5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads