tofsee | 0a00b714c94abdf3cf1a85956440a74e31fe3887f561d5627d8c7511672bb7a9

General

Target

2025-02-03_29b1f7c9d6998f93ca26325b82a59f24_mafia.exe
Size

11.2MB
MD5

29b1f7c9d6998f93ca26325b82a59f24
SHA1

2d46160cf171e7e8f4704e94438e2a5072554369
SHA256

0a00b714c94abdf3cf1a85956440a74e31fe3887f561d5627d8c7511672bb7a9
SHA512

2289ae285a4a8e812cd7726a42cbce67e3afb8cacf966508b6058d5cc89258ae08edca5e6030110a73fdb53c50666ff80e7f2428caf4cf2f8f7a73ce94702951
SSDEEP

3072:mLBgXOXcdW8tar7vGdq8c7YMl2b8anmMXnb58XuDP9het3Zv1oSW1za2E+w5C2/g:POMdRQr7OB0ypmMXnl8XEPM3noSWOCF

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
3544	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\ikvxifsx\ImagePath = "C:\\Windows\\SysWOW64\\ikvxifsx\\nvkobzii.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-1-5-21-4174397412-4125106315-2776226590-1000\Control Panel\International\Geo\Nation	2025-02-03_29b1f7c9d6998f93ca26325b82a59f24_mafia.exe

Deletes itself 1 IoCs

pid	Process
4048	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4292	nvkobzii.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4292 set thread context of 4048	4292	nvkobzii.exe	102

Launches sc.exe 3 IoCs

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

pid	Process
728	sc.exe
4084	sc.exe
1316	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
4668	2740	WerFault.exe	82
3472	4292	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	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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2025-02-03_29b1f7c9d6998f93ca26325b82a59f24_mafia.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	nvkobzii.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2740 wrote to memory of 2776	2740	2025-02-03_29b1f7c9d6998f93ca26325b82a59f24_mafia.exe	86
PID 2740 wrote to memory of 2776	2740	2025-02-03_29b1f7c9d6998f93ca26325b82a59f24_mafia.exe	86
PID 2740 wrote to memory of 2776	2740	2025-02-03_29b1f7c9d6998f93ca26325b82a59f24_mafia.exe	86
PID 2740 wrote to memory of 2736	2740	2025-02-03_29b1f7c9d6998f93ca26325b82a59f24_mafia.exe	88
PID 2740 wrote to memory of 2736	2740	2025-02-03_29b1f7c9d6998f93ca26325b82a59f24_mafia.exe	88
PID 2740 wrote to memory of 2736	2740	2025-02-03_29b1f7c9d6998f93ca26325b82a59f24_mafia.exe	88
PID 2740 wrote to memory of 728	2740	2025-02-03_29b1f7c9d6998f93ca26325b82a59f24_mafia.exe	90
PID 2740 wrote to memory of 728	2740	2025-02-03_29b1f7c9d6998f93ca26325b82a59f24_mafia.exe	90
PID 2740 wrote to memory of 728	2740	2025-02-03_29b1f7c9d6998f93ca26325b82a59f24_mafia.exe	90
PID 2740 wrote to memory of 4084	2740	2025-02-03_29b1f7c9d6998f93ca26325b82a59f24_mafia.exe	92
PID 2740 wrote to memory of 4084	2740	2025-02-03_29b1f7c9d6998f93ca26325b82a59f24_mafia.exe	92
PID 2740 wrote to memory of 4084	2740	2025-02-03_29b1f7c9d6998f93ca26325b82a59f24_mafia.exe	92
PID 2740 wrote to memory of 1316	2740	2025-02-03_29b1f7c9d6998f93ca26325b82a59f24_mafia.exe	94
PID 2740 wrote to memory of 1316	2740	2025-02-03_29b1f7c9d6998f93ca26325b82a59f24_mafia.exe	94
PID 2740 wrote to memory of 1316	2740	2025-02-03_29b1f7c9d6998f93ca26325b82a59f24_mafia.exe	94
PID 2740 wrote to memory of 3544	2740	2025-02-03_29b1f7c9d6998f93ca26325b82a59f24_mafia.exe	97
PID 2740 wrote to memory of 3544	2740	2025-02-03_29b1f7c9d6998f93ca26325b82a59f24_mafia.exe	97
PID 2740 wrote to memory of 3544	2740	2025-02-03_29b1f7c9d6998f93ca26325b82a59f24_mafia.exe	97
PID 4292 wrote to memory of 4048	4292	nvkobzii.exe	102
PID 4292 wrote to memory of 4048	4292	nvkobzii.exe	102
PID 4292 wrote to memory of 4048	4292	nvkobzii.exe	102
PID 4292 wrote to memory of 4048	4292	nvkobzii.exe	102
PID 4292 wrote to memory of 4048	4292	nvkobzii.exe	102

C:\Users\Admin\AppData\Local\Temp\2025-02-03_29b1f7c9d6998f93ca26325b82a59f24_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2025-02-03_29b1f7c9d6998f93ca26325b82a59f24_mafia.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2740
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ikvxifsx\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2776
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\nvkobzii.exe" C:\Windows\SysWOW64\ikvxifsx\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2736
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create ikvxifsx binPath= "C:\Windows\SysWOW64\ikvxifsx\nvkobzii.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-02-03_29b1f7c9d6998f93ca26325b82a59f24_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:728
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description ikvxifsx "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4084
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start ikvxifsx
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1316
- 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:3544
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2740 -s 1184
  2⤵
  - Program crash
  PID:4668

C:\Windows\SysWOW64\ikvxifsx\nvkobzii.exe
C:\Windows\SysWOW64\ikvxifsx\nvkobzii.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-02-03_29b1f7c9d6998f93ca26325b82a59f24_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4292
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4048
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4292 -s 556
  2⤵
  - Program crash
  PID:3472

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2740 -ip 2740
1⤵
PID:644

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 4292 -ip 4292
1⤵
PID:2732

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\nvkobzii.exe

Filesize
12.7MB

MD5
1ce6e5c4f608e43857fa84411e656e7a

SHA1
fa636af8fa2a71c057c163d37f0380e4b98ae8c3

SHA256
073217ee649b4003b39df11451fca87c37e0325c7aeca28131639b8b8a1ac262

SHA512
c3716596b5de15e0712e4eab075458a245fcaa8f6d486cdf38c4a4c8624a502cc3a729588cd192f858cb8d2455125cb87ef9a87dc518d3502aaa8a420c1cc38b

Download Submit
memory/2740-8-0x00000000009B0000-0x00000000009C3000-memory.dmp

Filesize
76KB

Download
memory/2740-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2740-1-0x00000000005B0000-0x00000000006B0000-memory.dmp

Filesize
1024KB

Download
memory/2740-7-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/2740-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2740-2-0x00000000009B0000-0x00000000009C3000-memory.dmp

Filesize
76KB

Download
memory/4048-14-0x0000000000850000-0x0000000000865000-memory.dmp

Filesize
84KB

Download
memory/4048-16-0x0000000000850000-0x0000000000865000-memory.dmp

Filesize
84KB

Download
memory/4048-17-0x0000000000850000-0x0000000000865000-memory.dmp

Filesize
84KB

Download
memory/4292-12-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/4292-11-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/4292-13-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/4292-19-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads