tofsee | 0bb8c786641edd50ada305f84b274007bc53fbfd4fe1ffc25d88d5aa8c36776b

General

Target

2025-01-27_92661afbd99d23847a0d397ed66ef9f6_mafia.exe
Size

15.0MB
MD5

92661afbd99d23847a0d397ed66ef9f6
SHA1

0e788a3d9d87ee64e56f4f8c90de78e6cbf9b54f
SHA256

0bb8c786641edd50ada305f84b274007bc53fbfd4fe1ffc25d88d5aa8c36776b
SHA512

5f4a15394a8905838b129554cac1cfc83dcd164fdd68e2ab010cedb9a087bf0ffd0a5a192a30e63f3fb7a9bf27b740e551ee8d76b568b7b3ba2412170fffb55d
SSDEEP

24576:fEfmTNIkv/ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZb:cfot

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
4396	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\unmukfnp\ImagePath = "C:\\Windows\\SysWOW64\\unmukfnp\\tcwbtsnj.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-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	2025-01-27_92661afbd99d23847a0d397ed66ef9f6_mafia.exe

Deletes itself 1 IoCs

pid	Process
4276	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3132	tcwbtsnj.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3132 set thread context of 4276	3132	tcwbtsnj.exe	102

Launches sc.exe 3 IoCs

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

pid	Process
2824	sc.exe
5064	sc.exe
3740	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 queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
1216	1716	WerFault.exe	84
2072	3132	WerFault.exe	95

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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tcwbtsnj.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2025-01-27_92661afbd99d23847a0d397ed66ef9f6_mafia.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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1716 wrote to memory of 4272	1716	2025-01-27_92661afbd99d23847a0d397ed66ef9f6_mafia.exe	85
PID 1716 wrote to memory of 4272	1716	2025-01-27_92661afbd99d23847a0d397ed66ef9f6_mafia.exe	85
PID 1716 wrote to memory of 4272	1716	2025-01-27_92661afbd99d23847a0d397ed66ef9f6_mafia.exe	85
PID 1716 wrote to memory of 3104	1716	2025-01-27_92661afbd99d23847a0d397ed66ef9f6_mafia.exe	87
PID 1716 wrote to memory of 3104	1716	2025-01-27_92661afbd99d23847a0d397ed66ef9f6_mafia.exe	87
PID 1716 wrote to memory of 3104	1716	2025-01-27_92661afbd99d23847a0d397ed66ef9f6_mafia.exe	87
PID 1716 wrote to memory of 5064	1716	2025-01-27_92661afbd99d23847a0d397ed66ef9f6_mafia.exe	89
PID 1716 wrote to memory of 5064	1716	2025-01-27_92661afbd99d23847a0d397ed66ef9f6_mafia.exe	89
PID 1716 wrote to memory of 5064	1716	2025-01-27_92661afbd99d23847a0d397ed66ef9f6_mafia.exe	89
PID 1716 wrote to memory of 3740	1716	2025-01-27_92661afbd99d23847a0d397ed66ef9f6_mafia.exe	91
PID 1716 wrote to memory of 3740	1716	2025-01-27_92661afbd99d23847a0d397ed66ef9f6_mafia.exe	91
PID 1716 wrote to memory of 3740	1716	2025-01-27_92661afbd99d23847a0d397ed66ef9f6_mafia.exe	91
PID 1716 wrote to memory of 2824	1716	2025-01-27_92661afbd99d23847a0d397ed66ef9f6_mafia.exe	93
PID 1716 wrote to memory of 2824	1716	2025-01-27_92661afbd99d23847a0d397ed66ef9f6_mafia.exe	93
PID 1716 wrote to memory of 2824	1716	2025-01-27_92661afbd99d23847a0d397ed66ef9f6_mafia.exe	93
PID 1716 wrote to memory of 4396	1716	2025-01-27_92661afbd99d23847a0d397ed66ef9f6_mafia.exe	96
PID 1716 wrote to memory of 4396	1716	2025-01-27_92661afbd99d23847a0d397ed66ef9f6_mafia.exe	96
PID 1716 wrote to memory of 4396	1716	2025-01-27_92661afbd99d23847a0d397ed66ef9f6_mafia.exe	96
PID 3132 wrote to memory of 4276	3132	tcwbtsnj.exe	102
PID 3132 wrote to memory of 4276	3132	tcwbtsnj.exe	102
PID 3132 wrote to memory of 4276	3132	tcwbtsnj.exe	102
PID 3132 wrote to memory of 4276	3132	tcwbtsnj.exe	102
PID 3132 wrote to memory of 4276	3132	tcwbtsnj.exe	102

C:\Users\Admin\AppData\Local\Temp\2025-01-27_92661afbd99d23847a0d397ed66ef9f6_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2025-01-27_92661afbd99d23847a0d397ed66ef9f6_mafia.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1716
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\unmukfnp\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4272
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\tcwbtsnj.exe" C:\Windows\SysWOW64\unmukfnp\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3104
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create unmukfnp binPath= "C:\Windows\SysWOW64\unmukfnp\tcwbtsnj.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-01-27_92661afbd99d23847a0d397ed66ef9f6_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:5064
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description unmukfnp "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3740
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start unmukfnp
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2824
- 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:4396
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1716 -s 1236
  2⤵
  - Program crash
  PID:1216

C:\Windows\SysWOW64\unmukfnp\tcwbtsnj.exe
C:\Windows\SysWOW64\unmukfnp\tcwbtsnj.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-01-27_92661afbd99d23847a0d397ed66ef9f6_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3132
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4276
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3132 -s 508
  2⤵
  - Program crash
  PID:2072

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 1716 -ip 1716
1⤵
PID:3824

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 512 -p 3132 -ip 3132
1⤵
PID:2488

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\tcwbtsnj.exe

Filesize
10.8MB

MD5
403baa9cf9e56a45526eb7a5ef3e0eed

SHA1
519d1f21b288b7176d9c8effb1b4b489bf2b812a

SHA256
36eaf80d8f4c725a82682eab6cd6be24404ffd428c19776a4c18ac72c14e9666

SHA512
48ff778cb8f8bec2cc01577ebb1128ab9fe50478c51d7ee5d5580cf938c03ce6a35d00384aae9d54c4a536e0b7270f9dcbdc7d79ef903287b1776d0b13afaf25

Download Submit
memory/1716-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1716-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1716-2-0x0000000000770000-0x0000000000783000-memory.dmp

Filesize
76KB

Download
memory/1716-7-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/1716-8-0x0000000000770000-0x0000000000783000-memory.dmp

Filesize
76KB

Download
memory/1716-1-0x00000000007A0000-0x00000000008A0000-memory.dmp

Filesize
1024KB

Download
memory/3132-12-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/3132-11-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/3132-18-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/4276-13-0x00000000006B0000-0x00000000006C5000-memory.dmp

Filesize
84KB

Download
memory/4276-15-0x00000000006B0000-0x00000000006C5000-memory.dmp

Filesize
84KB

Download
memory/4276-16-0x00000000006B0000-0x00000000006C5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads