tofsee | df903842e22291df470826cae9a31ff44e2293ebd012c28a682f6ebfc214c1cd

General

Target

2024-09-21_f178952f1644818d0c1e3e334b749c46_mafia.exe
Size

14.5MB
MD5

f178952f1644818d0c1e3e334b749c46
SHA1

b650ad19d57033a81b344177935f447f08ab5bfe
SHA256

df903842e22291df470826cae9a31ff44e2293ebd012c28a682f6ebfc214c1cd
SHA512

3001563ad672b8c15304772002412556ba1644f0cc0fe1a983f14f4a213e90245e84fe261b1ad12c1be2c8674cf34bac92494226c7ef0d25290eee7d6079b149
SSDEEP

12288:8Vbj7zJB99tzBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBJ:8JzXd

Score

10^/10

tofsee discovery evasion 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
Creates new service(s) 2 TTPs
persistence execution

Windows Service
T1543.003

Service Execution
T1569.002
Modifies Windows Firewall 2 TTPs 1 IoCs
evasion

Windows Service
T1543.003

Disable or Modify System Firewall
T1562.004

Processes:

netsh.exe

pid process

4364 netsh.exe

pid	process
4364	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\ykksfmf\ImagePath = "C:\\Windows\\SysWOW64\\ykksfmf\\neahyxbf.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

Processes:

2024-09-21_f178952f1644818d0c1e3e334b749c46_mafia.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\Control Panel\International\Geo\Nation	2024-09-21_f178952f1644818d0c1e3e334b749c46_mafia.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

1720 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

neahyxbf.exe

pid process

3088 neahyxbf.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

neahyxbf.exe

description pid process target process

PID 3088 set thread context of 1720 3088 neahyxbf.exe svchost.exe
Launches sc.exe 3 IoCs
Sc.exe is a Windows utlilty to control services on the system.

Processes:

sc.exesc.exesc.exe

pid process

3920 sc.exe
2060 sc.exe
1172 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
1720	svchost.exe

pid	process
3088	neahyxbf.exe

description	pid	process	target process
PID 3088 set thread context of 1720	3088	neahyxbf.exe	svchost.exe

pid	process
3920	sc.exe
2060	sc.exe
1172	sc.exe

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

Processes:

netsh.exe

description	ioc	process
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

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

Processes:

2024-09-21_f178952f1644818d0c1e3e334b749c46_mafia.exenetsh.exeneahyxbf.exesvchost.execmd.execmd.exesc.exesc.exesc.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2024-09-21_f178952f1644818d0c1e3e334b749c46_mafia.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	neahyxbf.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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

2024-09-21_f178952f1644818d0c1e3e334b749c46_mafia.exeneahyxbf.exe

description	pid	process	target process
PID 4400 wrote to memory of 3836	4400	2024-09-21_f178952f1644818d0c1e3e334b749c46_mafia.exe	cmd.exe
PID 4400 wrote to memory of 3836	4400	2024-09-21_f178952f1644818d0c1e3e334b749c46_mafia.exe	cmd.exe
PID 4400 wrote to memory of 3836	4400	2024-09-21_f178952f1644818d0c1e3e334b749c46_mafia.exe	cmd.exe
PID 4400 wrote to memory of 968	4400	2024-09-21_f178952f1644818d0c1e3e334b749c46_mafia.exe	cmd.exe
PID 4400 wrote to memory of 968	4400	2024-09-21_f178952f1644818d0c1e3e334b749c46_mafia.exe	cmd.exe
PID 4400 wrote to memory of 968	4400	2024-09-21_f178952f1644818d0c1e3e334b749c46_mafia.exe	cmd.exe
PID 4400 wrote to memory of 3920	4400	2024-09-21_f178952f1644818d0c1e3e334b749c46_mafia.exe	sc.exe
PID 4400 wrote to memory of 3920	4400	2024-09-21_f178952f1644818d0c1e3e334b749c46_mafia.exe	sc.exe
PID 4400 wrote to memory of 3920	4400	2024-09-21_f178952f1644818d0c1e3e334b749c46_mafia.exe	sc.exe
PID 4400 wrote to memory of 2060	4400	2024-09-21_f178952f1644818d0c1e3e334b749c46_mafia.exe	sc.exe
PID 4400 wrote to memory of 2060	4400	2024-09-21_f178952f1644818d0c1e3e334b749c46_mafia.exe	sc.exe
PID 4400 wrote to memory of 2060	4400	2024-09-21_f178952f1644818d0c1e3e334b749c46_mafia.exe	sc.exe
PID 4400 wrote to memory of 1172	4400	2024-09-21_f178952f1644818d0c1e3e334b749c46_mafia.exe	sc.exe
PID 4400 wrote to memory of 1172	4400	2024-09-21_f178952f1644818d0c1e3e334b749c46_mafia.exe	sc.exe
PID 4400 wrote to memory of 1172	4400	2024-09-21_f178952f1644818d0c1e3e334b749c46_mafia.exe	sc.exe
PID 4400 wrote to memory of 4364	4400	2024-09-21_f178952f1644818d0c1e3e334b749c46_mafia.exe	netsh.exe
PID 4400 wrote to memory of 4364	4400	2024-09-21_f178952f1644818d0c1e3e334b749c46_mafia.exe	netsh.exe
PID 4400 wrote to memory of 4364	4400	2024-09-21_f178952f1644818d0c1e3e334b749c46_mafia.exe	netsh.exe
PID 3088 wrote to memory of 1720	3088	neahyxbf.exe	svchost.exe
PID 3088 wrote to memory of 1720	3088	neahyxbf.exe	svchost.exe
PID 3088 wrote to memory of 1720	3088	neahyxbf.exe	svchost.exe
PID 3088 wrote to memory of 1720	3088	neahyxbf.exe	svchost.exe
PID 3088 wrote to memory of 1720	3088	neahyxbf.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\2024-09-21_f178952f1644818d0c1e3e334b749c46_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2024-09-21_f178952f1644818d0c1e3e334b749c46_mafia.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4400

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ykksfmf\
2⤵
- System Location Discovery: System Language Discovery
PID:3836

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\neahyxbf.exe" C:\Windows\SysWOW64\ykksfmf\
2⤵
- System Location Discovery: System Language Discovery
PID:968

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create ykksfmf binPath= "C:\Windows\SysWOW64\ykksfmf\neahyxbf.exe /d\"C:\Users\Admin\AppData\Local\Temp\2024-09-21_f178952f1644818d0c1e3e334b749c46_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
- System Location Discovery: System Language Discovery
PID:3920

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description ykksfmf "wifi internet conection"
2⤵
- Launches sc.exe
- System Location Discovery: System Language Discovery
PID:2060

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start ykksfmf
2⤵
- Launches sc.exe
- System Location Discovery: System Language Discovery
PID:1172

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:4364

C:\Windows\SysWOW64\ykksfmf\neahyxbf.exe
C:\Windows\SysWOW64\ykksfmf\neahyxbf.exe /d"C:\Users\Admin\AppData\Local\Temp\2024-09-21_f178952f1644818d0c1e3e334b749c46_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3088

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
- Deletes itself
- System Location Discovery: System Language Discovery
PID:1720

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

Loading Replay Monitor...

Downloads

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

Filesize
13.5MB

MD5
2a741e3373a4f445aff4360c626554da

SHA1
af3e27224d77bead3ec769826fdf72bb5754b412

SHA256
62d44782ee4142b81b8423f183be2d527b221cae1f0922c591f18296607abaec

SHA512
fc2ab6c3d92810d131e5bd15697447be9cde1431118fad16b9591739a6dafab7a58b5696d6b63dcb692a01c59d343884f3d384b13786544811fc427990a82265

Download Submit
memory/1720-14-0x0000000000960000-0x0000000000975000-memory.dmp

Filesize
84KB

Download
memory/1720-19-0x0000000000960000-0x0000000000975000-memory.dmp

Filesize
84KB

Download
memory/1720-18-0x0000000000960000-0x0000000000975000-memory.dmp

Filesize
84KB

Download
memory/3088-13-0x0000000000400000-0x000000000045D000-memory.dmp

Filesize
372KB

Download
memory/3088-12-0x0000000000400000-0x000000000045D000-memory.dmp

Filesize
372KB

Download
memory/3088-11-0x0000000000400000-0x000000000045D000-memory.dmp

Filesize
372KB

Download
memory/3088-16-0x0000000000400000-0x000000000045D000-memory.dmp

Filesize
372KB

Download
memory/4400-8-0x0000000000600000-0x0000000000613000-memory.dmp

Filesize
76KB

Download
memory/4400-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4400-1-0x0000000000640000-0x0000000000740000-memory.dmp

Filesize
1024KB

Download
memory/4400-7-0x0000000000400000-0x000000000045D000-memory.dmp

Filesize
372KB

Download
memory/4400-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4400-2-0x0000000000600000-0x0000000000613000-memory.dmp

Filesize
76KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads