tofsee | 63438e509a8a7f7123a45b73eed3ffe053ccf822bb846c910489aaa09cf4ff5c

General

Target

2025-01-13_1f4a4a6b40d626bd540eb7d712674869_mafia.exe
Size

10.7MB
MD5

1f4a4a6b40d626bd540eb7d712674869
SHA1

50d3ab9cd6af07bb228319c1b11bd2880d6c2a61
SHA256

63438e509a8a7f7123a45b73eed3ffe053ccf822bb846c910489aaa09cf4ff5c
SHA512

da9e39aaeebb6c3029cdccf4781545f833b41351560f8e22311c21d84503f958e2d9c5a4e28504b01ac7952d1423da14b0b93ccadacd2c5bbc1f65cce61a29d8
SSDEEP

24576:HpomTTN9tttttttttttttttttttttttttttttttttttttttttttttttttttttttv:Joo

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
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

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
3844	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\rctugvtf\ImagePath = "C:\\Windows\\SysWOW64\\rctugvtf\\sunyfnbr.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-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	2025-01-13_1f4a4a6b40d626bd540eb7d712674869_mafia.exe

Deletes itself 1 IoCs

pid	Process
1248	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1904	sunyfnbr.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1904 set thread context of 1248	1904	sunyfnbr.exe	102

Launches sc.exe 3 IoCs

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

pid	Process
3720	sc.exe
4812	sc.exe
2908	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
4868	972	WerFault.exe	81
4948	1904	WerFault.exe	92

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	svchost.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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sunyfnbr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2025-01-13_1f4a4a6b40d626bd540eb7d712674869_mafia.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 972 wrote to memory of 4676	972	2025-01-13_1f4a4a6b40d626bd540eb7d712674869_mafia.exe	82
PID 972 wrote to memory of 4676	972	2025-01-13_1f4a4a6b40d626bd540eb7d712674869_mafia.exe	82
PID 972 wrote to memory of 4676	972	2025-01-13_1f4a4a6b40d626bd540eb7d712674869_mafia.exe	82
PID 972 wrote to memory of 2824	972	2025-01-13_1f4a4a6b40d626bd540eb7d712674869_mafia.exe	84
PID 972 wrote to memory of 2824	972	2025-01-13_1f4a4a6b40d626bd540eb7d712674869_mafia.exe	84
PID 972 wrote to memory of 2824	972	2025-01-13_1f4a4a6b40d626bd540eb7d712674869_mafia.exe	84
PID 972 wrote to memory of 3720	972	2025-01-13_1f4a4a6b40d626bd540eb7d712674869_mafia.exe	86
PID 972 wrote to memory of 3720	972	2025-01-13_1f4a4a6b40d626bd540eb7d712674869_mafia.exe	86
PID 972 wrote to memory of 3720	972	2025-01-13_1f4a4a6b40d626bd540eb7d712674869_mafia.exe	86
PID 972 wrote to memory of 4812	972	2025-01-13_1f4a4a6b40d626bd540eb7d712674869_mafia.exe	88
PID 972 wrote to memory of 4812	972	2025-01-13_1f4a4a6b40d626bd540eb7d712674869_mafia.exe	88
PID 972 wrote to memory of 4812	972	2025-01-13_1f4a4a6b40d626bd540eb7d712674869_mafia.exe	88
PID 972 wrote to memory of 2908	972	2025-01-13_1f4a4a6b40d626bd540eb7d712674869_mafia.exe	90
PID 972 wrote to memory of 2908	972	2025-01-13_1f4a4a6b40d626bd540eb7d712674869_mafia.exe	90
PID 972 wrote to memory of 2908	972	2025-01-13_1f4a4a6b40d626bd540eb7d712674869_mafia.exe	90
PID 972 wrote to memory of 3844	972	2025-01-13_1f4a4a6b40d626bd540eb7d712674869_mafia.exe	93
PID 972 wrote to memory of 3844	972	2025-01-13_1f4a4a6b40d626bd540eb7d712674869_mafia.exe	93
PID 972 wrote to memory of 3844	972	2025-01-13_1f4a4a6b40d626bd540eb7d712674869_mafia.exe	93
PID 1904 wrote to memory of 1248	1904	sunyfnbr.exe	102
PID 1904 wrote to memory of 1248	1904	sunyfnbr.exe	102
PID 1904 wrote to memory of 1248	1904	sunyfnbr.exe	102
PID 1904 wrote to memory of 1248	1904	sunyfnbr.exe	102
PID 1904 wrote to memory of 1248	1904	sunyfnbr.exe	102

C:\Users\Admin\AppData\Local\Temp\2025-01-13_1f4a4a6b40d626bd540eb7d712674869_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2025-01-13_1f4a4a6b40d626bd540eb7d712674869_mafia.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:972
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\rctugvtf\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4676
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\sunyfnbr.exe" C:\Windows\SysWOW64\rctugvtf\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2824
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create rctugvtf binPath= "C:\Windows\SysWOW64\rctugvtf\sunyfnbr.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-01-13_1f4a4a6b40d626bd540eb7d712674869_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3720
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description rctugvtf "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4812
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start rctugvtf
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2908
- 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:3844
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 972 -s 1272
  2⤵
  - Program crash
  PID:4868

C:\Windows\SysWOW64\rctugvtf\sunyfnbr.exe
C:\Windows\SysWOW64\rctugvtf\sunyfnbr.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-01-13_1f4a4a6b40d626bd540eb7d712674869_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1904
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:1248
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1904 -s 512
  2⤵
  - Program crash
  PID:4948

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 972 -ip 972
1⤵
PID:5068

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 1904 -ip 1904
1⤵
PID:1868

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\sunyfnbr.exe

Filesize
12.0MB

MD5
c637089ab54314c90986ec81a304e0dc

SHA1
014dc7831a4f8177e5fc23937859b89e0de2de6b

SHA256
4940b64d036adb8a281feeb4976cbf45c0e465ac4ee72f0c37a7a1e1ff56de2c

SHA512
914a2fdade109e75eefc435498d23a1a72f6b27ae146432bbab4c125f0d98429e9fb93982607714c2a9c011138c46d7d70188f4385fd684c1cd89a5cc82a1acd

Download Submit
memory/972-8-0x0000000000490000-0x00000000004A3000-memory.dmp

Filesize
76KB

Download
memory/972-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/972-2-0x0000000000490000-0x00000000004A3000-memory.dmp

Filesize
76KB

Download
memory/972-7-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/972-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/972-1-0x00000000004D0000-0x00000000005D0000-memory.dmp

Filesize
1024KB

Download
memory/1248-14-0x0000000000ED0000-0x0000000000EE5000-memory.dmp

Filesize
84KB

Download
memory/1248-16-0x0000000000ED0000-0x0000000000EE5000-memory.dmp

Filesize
84KB

Download
memory/1248-17-0x0000000000ED0000-0x0000000000EE5000-memory.dmp

Filesize
84KB

Download
memory/1904-11-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/1904-12-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/1904-13-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/1904-18-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads