tofsee | ed98b31af733799ca5a4b743a628943249659438e24e73b4ea807b28ded5c550

General

Target

2025-02-02_7baf89bfa4b189fa487b389f45d22c0b_mafia.exe
Size

13.3MB
MD5

7baf89bfa4b189fa487b389f45d22c0b
SHA1

09ab6a993e1c0f7ee013fbea1d10edddeb96ee4d
SHA256

ed98b31af733799ca5a4b743a628943249659438e24e73b4ea807b28ded5c550
SHA512

b528858aeb2de36ee2ae79d3e332f4059519ad70d0a19dd6179035c82854734cc4f8ccf277477bdd7929ee9f9157392a6227a3fb7a68ce97f6b11b9c087bc41e
SSDEEP

24576:uEfmTNIkv/ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZx:Hfot

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
2468	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\fvjowgnu\ImagePath = "C:\\Windows\\SysWOW64\\fvjowgnu\\reqngtyi.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-1-5-21-4003209913-3868522715-854928974-1000\Control Panel\International\Geo\Nation	2025-02-02_7baf89bfa4b189fa487b389f45d22c0b_mafia.exe

Deletes itself 1 IoCs

pid	Process
4172	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3616	reqngtyi.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3616 set thread context of 4172	3616	reqngtyi.exe	102

Launches sc.exe 3 IoCs

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

pid	Process
3840	sc.exe
3636	sc.exe
2136	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
4600	3680	WerFault.exe	82
4412	3616	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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reqngtyi.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2025-02-02_7baf89bfa4b189fa487b389f45d22c0b_mafia.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3680 wrote to memory of 4880	3680	2025-02-02_7baf89bfa4b189fa487b389f45d22c0b_mafia.exe	86
PID 3680 wrote to memory of 4880	3680	2025-02-02_7baf89bfa4b189fa487b389f45d22c0b_mafia.exe	86
PID 3680 wrote to memory of 4880	3680	2025-02-02_7baf89bfa4b189fa487b389f45d22c0b_mafia.exe	86
PID 3680 wrote to memory of 3968	3680	2025-02-02_7baf89bfa4b189fa487b389f45d22c0b_mafia.exe	88
PID 3680 wrote to memory of 3968	3680	2025-02-02_7baf89bfa4b189fa487b389f45d22c0b_mafia.exe	88
PID 3680 wrote to memory of 3968	3680	2025-02-02_7baf89bfa4b189fa487b389f45d22c0b_mafia.exe	88
PID 3680 wrote to memory of 3840	3680	2025-02-02_7baf89bfa4b189fa487b389f45d22c0b_mafia.exe	90
PID 3680 wrote to memory of 3840	3680	2025-02-02_7baf89bfa4b189fa487b389f45d22c0b_mafia.exe	90
PID 3680 wrote to memory of 3840	3680	2025-02-02_7baf89bfa4b189fa487b389f45d22c0b_mafia.exe	90
PID 3680 wrote to memory of 3636	3680	2025-02-02_7baf89bfa4b189fa487b389f45d22c0b_mafia.exe	92
PID 3680 wrote to memory of 3636	3680	2025-02-02_7baf89bfa4b189fa487b389f45d22c0b_mafia.exe	92
PID 3680 wrote to memory of 3636	3680	2025-02-02_7baf89bfa4b189fa487b389f45d22c0b_mafia.exe	92
PID 3680 wrote to memory of 2136	3680	2025-02-02_7baf89bfa4b189fa487b389f45d22c0b_mafia.exe	94
PID 3680 wrote to memory of 2136	3680	2025-02-02_7baf89bfa4b189fa487b389f45d22c0b_mafia.exe	94
PID 3680 wrote to memory of 2136	3680	2025-02-02_7baf89bfa4b189fa487b389f45d22c0b_mafia.exe	94
PID 3680 wrote to memory of 2468	3680	2025-02-02_7baf89bfa4b189fa487b389f45d22c0b_mafia.exe	97
PID 3680 wrote to memory of 2468	3680	2025-02-02_7baf89bfa4b189fa487b389f45d22c0b_mafia.exe	97
PID 3680 wrote to memory of 2468	3680	2025-02-02_7baf89bfa4b189fa487b389f45d22c0b_mafia.exe	97
PID 3616 wrote to memory of 4172	3616	reqngtyi.exe	102
PID 3616 wrote to memory of 4172	3616	reqngtyi.exe	102
PID 3616 wrote to memory of 4172	3616	reqngtyi.exe	102
PID 3616 wrote to memory of 4172	3616	reqngtyi.exe	102
PID 3616 wrote to memory of 4172	3616	reqngtyi.exe	102

C:\Users\Admin\AppData\Local\Temp\2025-02-02_7baf89bfa4b189fa487b389f45d22c0b_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2025-02-02_7baf89bfa4b189fa487b389f45d22c0b_mafia.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3680
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\fvjowgnu\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4880
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\reqngtyi.exe" C:\Windows\SysWOW64\fvjowgnu\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3968
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create fvjowgnu binPath= "C:\Windows\SysWOW64\fvjowgnu\reqngtyi.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-02-02_7baf89bfa4b189fa487b389f45d22c0b_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3840
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description fvjowgnu "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3636
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start fvjowgnu
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2136
- 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:2468
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3680 -s 1148
  2⤵
  - Program crash
  PID:4600

C:\Windows\SysWOW64\fvjowgnu\reqngtyi.exe
C:\Windows\SysWOW64\fvjowgnu\reqngtyi.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-02-02_7baf89bfa4b189fa487b389f45d22c0b_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3616
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4172
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3616 -s 512
  2⤵
  - Program crash
  PID:4412

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 3680 -ip 3680
1⤵
PID:2828

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 3616 -ip 3616
1⤵
PID:2708

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\reqngtyi.exe

Filesize
11.5MB

MD5
1f76dd780dccc81d86b158baf6995833

SHA1
e743e3eb416e14fd084acf083215c2f8e9039b2a

SHA256
25568db1d8800cca7a35017a3f07dc426041af62bd618ebec17ececea30f2f3c

SHA512
63c242fea334334e03d21a75b8c1689804d5a5889dcf46a28311220c65f12ba21043f45138de7389f6032358bd1899028a2dcefda15cc9ebb2d8c8dac7dd7a1d

Download Submit
memory/3616-13-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/3616-11-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/3616-12-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/3616-17-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/3680-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3680-2-0x0000000000520000-0x0000000000533000-memory.dmp

Filesize
76KB

Download
memory/3680-7-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/3680-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3680-8-0x0000000000520000-0x0000000000533000-memory.dmp

Filesize
76KB

Download
memory/3680-1-0x00000000005B0000-0x00000000006B0000-memory.dmp

Filesize
1024KB

Download
memory/4172-16-0x0000000000B40000-0x0000000000B55000-memory.dmp

Filesize
84KB

Download
memory/4172-14-0x0000000000B40000-0x0000000000B55000-memory.dmp

Filesize
84KB

Download
memory/4172-18-0x0000000000B40000-0x0000000000B55000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads