tofsee | 23be3499b2b9a7e01237488f80243a36b9be5d528a0ec85a717cd4b0104ddbe8

General

Target

2025-01-21_6a397c7bc04ae63117f5925e9b9fd54f_mafia.exe
Size

12.9MB
MD5

6a397c7bc04ae63117f5925e9b9fd54f
SHA1

940657256af629fa51b70bc05779ef0976c63637
SHA256

23be3499b2b9a7e01237488f80243a36b9be5d528a0ec85a717cd4b0104ddbe8
SHA512

4dfb4f3e74ed91757bed613051d5cca3ed2b844e0eb72aa074d8540c01711d18e6707c93d5245f0bc685a2f6b5c3f5af1b75b0df38298f79b3e39312260eac83
SSDEEP

24576:WEfmTNIkv/ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZT:Pfot

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
5116	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\eixxthj\ImagePath = "C:\\Windows\\SysWOW64\\eixxthj\\cwwnyhya.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-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	2025-01-21_6a397c7bc04ae63117f5925e9b9fd54f_mafia.exe

Deletes itself 1 IoCs

pid	Process
2812	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2104	cwwnyhya.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2104 set thread context of 2812	2104	cwwnyhya.exe	98

Launches sc.exe 3 IoCs

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

pid	Process
3132	sc.exe
2820	sc.exe
60	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 queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
2056	4732	WerFault.exe	81
5112	2104	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	2025-01-21_6a397c7bc04ae63117f5925e9b9fd54f_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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cwwnyhya.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4732 wrote to memory of 4736	4732	2025-01-21_6a397c7bc04ae63117f5925e9b9fd54f_mafia.exe	82
PID 4732 wrote to memory of 4736	4732	2025-01-21_6a397c7bc04ae63117f5925e9b9fd54f_mafia.exe	82
PID 4732 wrote to memory of 4736	4732	2025-01-21_6a397c7bc04ae63117f5925e9b9fd54f_mafia.exe	82
PID 4732 wrote to memory of 3584	4732	2025-01-21_6a397c7bc04ae63117f5925e9b9fd54f_mafia.exe	84
PID 4732 wrote to memory of 3584	4732	2025-01-21_6a397c7bc04ae63117f5925e9b9fd54f_mafia.exe	84
PID 4732 wrote to memory of 3584	4732	2025-01-21_6a397c7bc04ae63117f5925e9b9fd54f_mafia.exe	84
PID 4732 wrote to memory of 2820	4732	2025-01-21_6a397c7bc04ae63117f5925e9b9fd54f_mafia.exe	86
PID 4732 wrote to memory of 2820	4732	2025-01-21_6a397c7bc04ae63117f5925e9b9fd54f_mafia.exe	86
PID 4732 wrote to memory of 2820	4732	2025-01-21_6a397c7bc04ae63117f5925e9b9fd54f_mafia.exe	86
PID 4732 wrote to memory of 60	4732	2025-01-21_6a397c7bc04ae63117f5925e9b9fd54f_mafia.exe	88
PID 4732 wrote to memory of 60	4732	2025-01-21_6a397c7bc04ae63117f5925e9b9fd54f_mafia.exe	88
PID 4732 wrote to memory of 60	4732	2025-01-21_6a397c7bc04ae63117f5925e9b9fd54f_mafia.exe	88
PID 4732 wrote to memory of 3132	4732	2025-01-21_6a397c7bc04ae63117f5925e9b9fd54f_mafia.exe	90
PID 4732 wrote to memory of 3132	4732	2025-01-21_6a397c7bc04ae63117f5925e9b9fd54f_mafia.exe	90
PID 4732 wrote to memory of 3132	4732	2025-01-21_6a397c7bc04ae63117f5925e9b9fd54f_mafia.exe	90
PID 4732 wrote to memory of 5116	4732	2025-01-21_6a397c7bc04ae63117f5925e9b9fd54f_mafia.exe	93
PID 4732 wrote to memory of 5116	4732	2025-01-21_6a397c7bc04ae63117f5925e9b9fd54f_mafia.exe	93
PID 4732 wrote to memory of 5116	4732	2025-01-21_6a397c7bc04ae63117f5925e9b9fd54f_mafia.exe	93
PID 2104 wrote to memory of 2812	2104	cwwnyhya.exe	98
PID 2104 wrote to memory of 2812	2104	cwwnyhya.exe	98
PID 2104 wrote to memory of 2812	2104	cwwnyhya.exe	98
PID 2104 wrote to memory of 2812	2104	cwwnyhya.exe	98
PID 2104 wrote to memory of 2812	2104	cwwnyhya.exe	98

C:\Users\Admin\AppData\Local\Temp\2025-01-21_6a397c7bc04ae63117f5925e9b9fd54f_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2025-01-21_6a397c7bc04ae63117f5925e9b9fd54f_mafia.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4732
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\eixxthj\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4736
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\cwwnyhya.exe" C:\Windows\SysWOW64\eixxthj\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3584
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create eixxthj binPath= "C:\Windows\SysWOW64\eixxthj\cwwnyhya.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-01-21_6a397c7bc04ae63117f5925e9b9fd54f_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2820
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description eixxthj "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:60
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start eixxthj
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3132
- 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:5116
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4732 -s 1200
  2⤵
  - Program crash
  PID:2056

C:\Windows\SysWOW64\eixxthj\cwwnyhya.exe
C:\Windows\SysWOW64\eixxthj\cwwnyhya.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-01-21_6a397c7bc04ae63117f5925e9b9fd54f_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2104
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2812
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2104 -s 512
  2⤵
  - Program crash
  PID:5112

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4732 -ip 4732
1⤵
PID:5012

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 2104 -ip 2104
1⤵
PID:2960

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\cwwnyhya.exe

Filesize
11.8MB

MD5
73772d05117227fc1e44335763fff970

SHA1
b96cd576bf8bd3d8c43a6db5c6efcc320cd703d0

SHA256
8368f1ab79fc278fd67f0d9df6fa51dec38029a7ba1b9cca5c00d26cc13bda21

SHA512
8ff32842ada8e19f7decbefb512d398cf8ffb3c7d7bf63b6c982465b30db6a1a539009d15bbcdbdfa7ce637b77994effd0017fb6806e75fdf742ad389e0e171c

Download Submit
memory/2104-13-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/2104-12-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/2104-11-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/2104-18-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/2812-14-0x0000000000A50000-0x0000000000A65000-memory.dmp

Filesize
84KB

Download
memory/2812-16-0x0000000000A50000-0x0000000000A65000-memory.dmp

Filesize
84KB

Download
memory/2812-17-0x0000000000A50000-0x0000000000A65000-memory.dmp

Filesize
84KB

Download
memory/4732-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4732-2-0x0000000000870000-0x0000000000883000-memory.dmp

Filesize
76KB

Download
memory/4732-7-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/4732-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4732-8-0x0000000000870000-0x0000000000883000-memory.dmp

Filesize
76KB

Download
memory/4732-1-0x0000000000450000-0x0000000000550000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads