tofsee | 65744d1fc2a6e583258dd9134447c94053c2fc875058b4e98e7c3b562b5597cb

General

Target

2025-02-03_57d27b6113c97e0701143f9b74c6b251_mafia.exe
Size

13.7MB
MD5

57d27b6113c97e0701143f9b74c6b251
SHA1

0b1e6f6725283c90b092f0407c1b26a8d06b7327
SHA256

65744d1fc2a6e583258dd9134447c94053c2fc875058b4e98e7c3b562b5597cb
SHA512

f519efd94de05de0186191ed54a9ea3876ca2ae81431b5aafc675a5ece29d3bb87a7afcdb418cf750142d3aaa89a3903f84a2a74827c961d6ae4661e4c642acd
SSDEEP

3072:zLBgXOXcdW8tar7vGdq8c7YMl2b8anmMXnb58XuDP9het3Zv1oSW1za2E+w5C2/Y:6OMdRQr7OB0ypmMXnl8XEPM3noSWOC

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
1248	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\onsflwoc\ImagePath = "C:\\Windows\\SysWOW64\\onsflwoc\\ucrvigpp.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_57d27b6113c97e0701143f9b74c6b251_mafia.exe

Deletes itself 1 IoCs

pid	Process
4848	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3556	ucrvigpp.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3556 set thread context of 4848	3556	ucrvigpp.exe	100

Launches sc.exe 3 IoCs

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

pid	Process
3460	sc.exe
2904	sc.exe
3600	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
1484	3168	WerFault.exe	81
2908	3556	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	cmd.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	2025-02-03_57d27b6113c97e0701143f9b74c6b251_mafia.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ucrvigpp.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3168 wrote to memory of 2428	3168	2025-02-03_57d27b6113c97e0701143f9b74c6b251_mafia.exe	82
PID 3168 wrote to memory of 2428	3168	2025-02-03_57d27b6113c97e0701143f9b74c6b251_mafia.exe	82
PID 3168 wrote to memory of 2428	3168	2025-02-03_57d27b6113c97e0701143f9b74c6b251_mafia.exe	82
PID 3168 wrote to memory of 624	3168	2025-02-03_57d27b6113c97e0701143f9b74c6b251_mafia.exe	84
PID 3168 wrote to memory of 624	3168	2025-02-03_57d27b6113c97e0701143f9b74c6b251_mafia.exe	84
PID 3168 wrote to memory of 624	3168	2025-02-03_57d27b6113c97e0701143f9b74c6b251_mafia.exe	84
PID 3168 wrote to memory of 3460	3168	2025-02-03_57d27b6113c97e0701143f9b74c6b251_mafia.exe	86
PID 3168 wrote to memory of 3460	3168	2025-02-03_57d27b6113c97e0701143f9b74c6b251_mafia.exe	86
PID 3168 wrote to memory of 3460	3168	2025-02-03_57d27b6113c97e0701143f9b74c6b251_mafia.exe	86
PID 3168 wrote to memory of 2904	3168	2025-02-03_57d27b6113c97e0701143f9b74c6b251_mafia.exe	88
PID 3168 wrote to memory of 2904	3168	2025-02-03_57d27b6113c97e0701143f9b74c6b251_mafia.exe	88
PID 3168 wrote to memory of 2904	3168	2025-02-03_57d27b6113c97e0701143f9b74c6b251_mafia.exe	88
PID 3168 wrote to memory of 3600	3168	2025-02-03_57d27b6113c97e0701143f9b74c6b251_mafia.exe	90
PID 3168 wrote to memory of 3600	3168	2025-02-03_57d27b6113c97e0701143f9b74c6b251_mafia.exe	90
PID 3168 wrote to memory of 3600	3168	2025-02-03_57d27b6113c97e0701143f9b74c6b251_mafia.exe	90
PID 3168 wrote to memory of 1248	3168	2025-02-03_57d27b6113c97e0701143f9b74c6b251_mafia.exe	93
PID 3168 wrote to memory of 1248	3168	2025-02-03_57d27b6113c97e0701143f9b74c6b251_mafia.exe	93
PID 3168 wrote to memory of 1248	3168	2025-02-03_57d27b6113c97e0701143f9b74c6b251_mafia.exe	93
PID 3556 wrote to memory of 4848	3556	ucrvigpp.exe	100
PID 3556 wrote to memory of 4848	3556	ucrvigpp.exe	100
PID 3556 wrote to memory of 4848	3556	ucrvigpp.exe	100
PID 3556 wrote to memory of 4848	3556	ucrvigpp.exe	100
PID 3556 wrote to memory of 4848	3556	ucrvigpp.exe	100

C:\Users\Admin\AppData\Local\Temp\2025-02-03_57d27b6113c97e0701143f9b74c6b251_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2025-02-03_57d27b6113c97e0701143f9b74c6b251_mafia.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3168
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\onsflwoc\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2428
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ucrvigpp.exe" C:\Windows\SysWOW64\onsflwoc\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:624
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create onsflwoc binPath= "C:\Windows\SysWOW64\onsflwoc\ucrvigpp.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-02-03_57d27b6113c97e0701143f9b74c6b251_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3460
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description onsflwoc "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2904
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start onsflwoc
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3600
- 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:1248
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3168 -s 1264
  2⤵
  - Program crash
  PID:1484

C:\Windows\SysWOW64\onsflwoc\ucrvigpp.exe
C:\Windows\SysWOW64\onsflwoc\ucrvigpp.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-02-03_57d27b6113c97e0701143f9b74c6b251_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3556
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4848
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3556 -s 556
  2⤵
  - Program crash
  PID:2908

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3168 -ip 3168
1⤵
PID:2688

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 3556 -ip 3556
1⤵
PID:432

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\ucrvigpp.exe

Filesize
14.5MB

MD5
fb5e347a7f72b8e2387d6bed2d513aa8

SHA1
a05f978100a23685599ec91d29da0cdedb9250bf

SHA256
30a6c437aa251a5ab2437b6c3b7c18c34540958c67cf8ac86a186afda3f606f0

SHA512
ab11c42049f2c07f155273133f34295a37b2c1f01866d82696f81d4027378aa727e6f8251fe93d61652b94609a64b540083cd28a767e2563d935701a609b1c41

Download Submit
memory/3168-7-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/3168-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3168-2-0x0000000000450000-0x0000000000463000-memory.dmp

Filesize
76KB

Download
memory/3168-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3168-8-0x0000000000450000-0x0000000000463000-memory.dmp

Filesize
76KB

Download
memory/3168-1-0x0000000000480000-0x0000000000580000-memory.dmp

Filesize
1024KB

Download
memory/3556-12-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/3556-11-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/3556-13-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/3556-19-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/4848-14-0x0000000000A40000-0x0000000000A55000-memory.dmp

Filesize
84KB

Download
memory/4848-16-0x0000000000A40000-0x0000000000A55000-memory.dmp

Filesize
84KB

Download
memory/4848-17-0x0000000000A40000-0x0000000000A55000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads