tofsee | 87a0db19083558b7383108d51b80eb6505f25d869dfd6c36ba9e66292d74a490

General

Target

2025-02-03_99c64ff1e1f52348d4b7dbbf5a0632f9_mafia.exe
Size

12.9MB
MD5

99c64ff1e1f52348d4b7dbbf5a0632f9
SHA1

12eece8338d93ed9dd22903f4e6c64d8e6f6531a
SHA256

87a0db19083558b7383108d51b80eb6505f25d869dfd6c36ba9e66292d74a490
SHA512

7eabb767096cb2cd25a019470018f7e69a8bb75872970eea7cb5aabb4bffb84d11261df95e7f619a4c5562ab893928ef69d38d40ed87c65d360eba3594d3176e
SSDEEP

24576:W6WdLQkyQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQY:XWdLQk

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
2020	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\vkvxovcs\ImagePath = "C:\\Windows\\SysWOW64\\vkvxovcs\\ylxunafp.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-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	2025-02-03_99c64ff1e1f52348d4b7dbbf5a0632f9_mafia.exe

Deletes itself 1 IoCs

pid	Process
1840	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1220	ylxunafp.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1220 set thread context of 1840	1220	ylxunafp.exe	98

Launches sc.exe 3 IoCs

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

pid	Process
4912	sc.exe
3764	sc.exe
4816	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
2864	4564	WerFault.exe	81
2168	1220	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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2025-02-03_99c64ff1e1f52348d4b7dbbf5a0632f9_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	ylxunafp.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	netsh.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4564 wrote to memory of 4352	4564	2025-02-03_99c64ff1e1f52348d4b7dbbf5a0632f9_mafia.exe	82
PID 4564 wrote to memory of 4352	4564	2025-02-03_99c64ff1e1f52348d4b7dbbf5a0632f9_mafia.exe	82
PID 4564 wrote to memory of 4352	4564	2025-02-03_99c64ff1e1f52348d4b7dbbf5a0632f9_mafia.exe	82
PID 4564 wrote to memory of 1600	4564	2025-02-03_99c64ff1e1f52348d4b7dbbf5a0632f9_mafia.exe	84
PID 4564 wrote to memory of 1600	4564	2025-02-03_99c64ff1e1f52348d4b7dbbf5a0632f9_mafia.exe	84
PID 4564 wrote to memory of 1600	4564	2025-02-03_99c64ff1e1f52348d4b7dbbf5a0632f9_mafia.exe	84
PID 4564 wrote to memory of 3764	4564	2025-02-03_99c64ff1e1f52348d4b7dbbf5a0632f9_mafia.exe	86
PID 4564 wrote to memory of 3764	4564	2025-02-03_99c64ff1e1f52348d4b7dbbf5a0632f9_mafia.exe	86
PID 4564 wrote to memory of 3764	4564	2025-02-03_99c64ff1e1f52348d4b7dbbf5a0632f9_mafia.exe	86
PID 4564 wrote to memory of 4816	4564	2025-02-03_99c64ff1e1f52348d4b7dbbf5a0632f9_mafia.exe	88
PID 4564 wrote to memory of 4816	4564	2025-02-03_99c64ff1e1f52348d4b7dbbf5a0632f9_mafia.exe	88
PID 4564 wrote to memory of 4816	4564	2025-02-03_99c64ff1e1f52348d4b7dbbf5a0632f9_mafia.exe	88
PID 4564 wrote to memory of 4912	4564	2025-02-03_99c64ff1e1f52348d4b7dbbf5a0632f9_mafia.exe	90
PID 4564 wrote to memory of 4912	4564	2025-02-03_99c64ff1e1f52348d4b7dbbf5a0632f9_mafia.exe	90
PID 4564 wrote to memory of 4912	4564	2025-02-03_99c64ff1e1f52348d4b7dbbf5a0632f9_mafia.exe	90
PID 4564 wrote to memory of 2020	4564	2025-02-03_99c64ff1e1f52348d4b7dbbf5a0632f9_mafia.exe	93
PID 4564 wrote to memory of 2020	4564	2025-02-03_99c64ff1e1f52348d4b7dbbf5a0632f9_mafia.exe	93
PID 4564 wrote to memory of 2020	4564	2025-02-03_99c64ff1e1f52348d4b7dbbf5a0632f9_mafia.exe	93
PID 1220 wrote to memory of 1840	1220	ylxunafp.exe	98
PID 1220 wrote to memory of 1840	1220	ylxunafp.exe	98
PID 1220 wrote to memory of 1840	1220	ylxunafp.exe	98
PID 1220 wrote to memory of 1840	1220	ylxunafp.exe	98
PID 1220 wrote to memory of 1840	1220	ylxunafp.exe	98

C:\Users\Admin\AppData\Local\Temp\2025-02-03_99c64ff1e1f52348d4b7dbbf5a0632f9_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2025-02-03_99c64ff1e1f52348d4b7dbbf5a0632f9_mafia.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4564
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vkvxovcs\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4352
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ylxunafp.exe" C:\Windows\SysWOW64\vkvxovcs\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1600
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create vkvxovcs binPath= "C:\Windows\SysWOW64\vkvxovcs\ylxunafp.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-02-03_99c64ff1e1f52348d4b7dbbf5a0632f9_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3764
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description vkvxovcs "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4816
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start vkvxovcs
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4912
- 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:2020
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4564 -s 1036
  2⤵
  - Program crash
  PID:2864

C:\Windows\SysWOW64\vkvxovcs\ylxunafp.exe
C:\Windows\SysWOW64\vkvxovcs\ylxunafp.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-02-03_99c64ff1e1f52348d4b7dbbf5a0632f9_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1220
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:1840
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1220 -s 508
  2⤵
  - Program crash
  PID:2168

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 4564 -ip 4564
1⤵
PID:4432

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 1220 -ip 1220
1⤵
PID:2812

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\ylxunafp.exe

Filesize
12.1MB

MD5
aec772a7e2480bebdbc7e98474314f6e

SHA1
9b189ecef3821d45fb0bd12915db35f7a4be77fc

SHA256
b7143f9b152c8088c24decca368c2c3c3bd01e5815fbf20f6b44385d7f1ae57a

SHA512
a5edb773ebc5e6dd09d20b97a416073ca7368cdcdaab9b4b841ad40305a10b64b747f1f9ecd8f135119d813e9d7174f8ef5f4608e99374b7bd7c3f1cf522f9e1

Download Submit
memory/1220-12-0x0000000000400000-0x000000000044F000-memory.dmp

Filesize
316KB

Download
memory/1220-18-0x0000000000400000-0x000000000044F000-memory.dmp

Filesize
316KB

Download
memory/1220-13-0x0000000000400000-0x000000000044F000-memory.dmp

Filesize
316KB

Download
memory/1220-11-0x0000000000400000-0x000000000044F000-memory.dmp

Filesize
316KB

Download
memory/1840-14-0x0000000000B80000-0x0000000000B95000-memory.dmp

Filesize
84KB

Download
memory/1840-16-0x0000000000B80000-0x0000000000B95000-memory.dmp

Filesize
84KB

Download
memory/1840-17-0x0000000000B80000-0x0000000000B95000-memory.dmp

Filesize
84KB

Download
memory/4564-8-0x0000000000490000-0x00000000004A3000-memory.dmp

Filesize
76KB

Download
memory/4564-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4564-7-0x0000000000400000-0x000000000044F000-memory.dmp

Filesize
316KB

Download
memory/4564-1-0x0000000000600000-0x0000000000700000-memory.dmp

Filesize
1024KB

Download
memory/4564-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4564-2-0x0000000000490000-0x00000000004A3000-memory.dmp

Filesize
76KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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