tofsee | 100ee4981f26fb5d937441fbc068f06a17ebb68fe2deab706772d847079ff834

General

Target

2025-02-02_a2984597331a8be73f5238c6e4072277_mafia.exe
Size

14.4MB
MD5

a2984597331a8be73f5238c6e4072277
SHA1

8b2c2040bbf391c2eace6251dc7f41c3fcc147de
SHA256

100ee4981f26fb5d937441fbc068f06a17ebb68fe2deab706772d847079ff834
SHA512

4e838fafd0ff617ddb7c9b7d8135133576b04b31734da4a24864cefc65b35ceac546fc766615eed87fe5f05630feb9b816272506d16bac71eccccf8da726e16b
SSDEEP

24576:wEfmTNIkv/ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZl:tfot

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
540	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\wnctosut\ImagePath = "C:\\Windows\\SysWOW64\\wnctosut\\wjvslydn.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-1-5-21-70482961-775596374-3727440602-1000\Control Panel\International\Geo\Nation	2025-02-02_a2984597331a8be73f5238c6e4072277_mafia.exe

Deletes itself 1 IoCs

pid	Process
2836	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1924	wjvslydn.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1924 set thread context of 2836	1924	wjvslydn.exe	105

Launches sc.exe 3 IoCs

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

pid	Process
1056	sc.exe
5096	sc.exe
2536	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
3848	908	WerFault.exe	82
2816	1924	WerFault.exe	99

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	2025-02-02_a2984597331a8be73f5238c6e4072277_mafia.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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wjvslydn.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

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 908 wrote to memory of 1416	908	2025-02-02_a2984597331a8be73f5238c6e4072277_mafia.exe	89
PID 908 wrote to memory of 1416	908	2025-02-02_a2984597331a8be73f5238c6e4072277_mafia.exe	89
PID 908 wrote to memory of 1416	908	2025-02-02_a2984597331a8be73f5238c6e4072277_mafia.exe	89
PID 908 wrote to memory of 5052	908	2025-02-02_a2984597331a8be73f5238c6e4072277_mafia.exe	91
PID 908 wrote to memory of 5052	908	2025-02-02_a2984597331a8be73f5238c6e4072277_mafia.exe	91
PID 908 wrote to memory of 5052	908	2025-02-02_a2984597331a8be73f5238c6e4072277_mafia.exe	91
PID 908 wrote to memory of 2536	908	2025-02-02_a2984597331a8be73f5238c6e4072277_mafia.exe	93
PID 908 wrote to memory of 2536	908	2025-02-02_a2984597331a8be73f5238c6e4072277_mafia.exe	93
PID 908 wrote to memory of 2536	908	2025-02-02_a2984597331a8be73f5238c6e4072277_mafia.exe	93
PID 908 wrote to memory of 1056	908	2025-02-02_a2984597331a8be73f5238c6e4072277_mafia.exe	95
PID 908 wrote to memory of 1056	908	2025-02-02_a2984597331a8be73f5238c6e4072277_mafia.exe	95
PID 908 wrote to memory of 1056	908	2025-02-02_a2984597331a8be73f5238c6e4072277_mafia.exe	95
PID 908 wrote to memory of 5096	908	2025-02-02_a2984597331a8be73f5238c6e4072277_mafia.exe	97
PID 908 wrote to memory of 5096	908	2025-02-02_a2984597331a8be73f5238c6e4072277_mafia.exe	97
PID 908 wrote to memory of 5096	908	2025-02-02_a2984597331a8be73f5238c6e4072277_mafia.exe	97
PID 908 wrote to memory of 540	908	2025-02-02_a2984597331a8be73f5238c6e4072277_mafia.exe	100
PID 908 wrote to memory of 540	908	2025-02-02_a2984597331a8be73f5238c6e4072277_mafia.exe	100
PID 908 wrote to memory of 540	908	2025-02-02_a2984597331a8be73f5238c6e4072277_mafia.exe	100
PID 1924 wrote to memory of 2836	1924	wjvslydn.exe	105
PID 1924 wrote to memory of 2836	1924	wjvslydn.exe	105
PID 1924 wrote to memory of 2836	1924	wjvslydn.exe	105
PID 1924 wrote to memory of 2836	1924	wjvslydn.exe	105
PID 1924 wrote to memory of 2836	1924	wjvslydn.exe	105

C:\Users\Admin\AppData\Local\Temp\2025-02-02_a2984597331a8be73f5238c6e4072277_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2025-02-02_a2984597331a8be73f5238c6e4072277_mafia.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:908
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\wnctosut\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1416
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\wjvslydn.exe" C:\Windows\SysWOW64\wnctosut\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:5052
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create wnctosut binPath= "C:\Windows\SysWOW64\wnctosut\wjvslydn.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-02-02_a2984597331a8be73f5238c6e4072277_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2536
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description wnctosut "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1056
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start wnctosut
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:5096
- 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:540
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 908 -s 1044
  2⤵
  - Program crash
  PID:3848

C:\Windows\SysWOW64\wnctosut\wjvslydn.exe
C:\Windows\SysWOW64\wnctosut\wjvslydn.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-02-02_a2984597331a8be73f5238c6e4072277_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1924
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2836
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1924 -s 512
  2⤵
  - Program crash
  PID:2816

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 908 -ip 908
1⤵
PID:4180

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 1924 -ip 1924
1⤵
PID:2272

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\wjvslydn.exe

Filesize
11.5MB

MD5
7ce7abcccd964aa33983c069f6d16bba

SHA1
9e753b8c8706934a7d6e78a983663b3efd3ba105

SHA256
6cf3fec2fb78b3a07068de501879b840eeeea632b5ec7502a702dbe252ee9694

SHA512
916b558809f17c3f74f4306b6471c45fcc39243cdf9d1b6b546139b159459bd9ec75dea2eae1f2697717ec8ba9c17172da41b2d49c3eba38ad42d859bb5ffc59

Download Submit
memory/908-7-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/908-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/908-1-0x0000000000820000-0x0000000000920000-memory.dmp

Filesize
1024KB

Download
memory/908-8-0x0000000000770000-0x0000000000783000-memory.dmp

Filesize
76KB

Download
memory/908-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/908-2-0x0000000000770000-0x0000000000783000-memory.dmp

Filesize
76KB

Download
memory/1924-12-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/1924-11-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/1924-13-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/1924-18-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/2836-14-0x0000000000E30000-0x0000000000E45000-memory.dmp

Filesize
84KB

Download
memory/2836-16-0x0000000000E30000-0x0000000000E45000-memory.dmp

Filesize
84KB

Download
memory/2836-17-0x0000000000E30000-0x0000000000E45000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads