tofsee | 48de4e638be5651ff2e3248b56e4bd338986f8822dc7e91c67a427e8aa535781

General

Target

2025-02-02_478e4f65654044f1fb361af997fedafa_mafia.exe
Size

14.5MB
MD5

478e4f65654044f1fb361af997fedafa
SHA1

261bbfc11b55391d2107065c054ce1573154395d
SHA256

48de4e638be5651ff2e3248b56e4bd338986f8822dc7e91c67a427e8aa535781
SHA512

1f0c147ba46e951fc66c931cadcac7d5632127dda0cecd5c3f124a2f6d1e6b11eaeae0ddb9199196c33471c0fd53b27b979ab8ae14cc14d252ec763ea58b6d06
SSDEEP

24576:bpomTTN9tttttttttttttttttttttttttttttttttttttttttttttttttttttttO:tooc

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
2304	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\bzxnvwjp\ImagePath = "C:\\Windows\\SysWOW64\\bzxnvwjp\\nemkupwk.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_478e4f65654044f1fb361af997fedafa_mafia.exe

Deletes itself 1 IoCs

pid	Process
1812	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4836	nemkupwk.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4836 set thread context of 1812	4836	nemkupwk.exe	102

Launches sc.exe 3 IoCs

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

pid	Process
3992	sc.exe
2864	sc.exe
2352	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
1532	2512	WerFault.exe	82
1040	4836	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	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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	nemkupwk.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2025-02-02_478e4f65654044f1fb361af997fedafa_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

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2512 wrote to memory of 3420	2512	2025-02-02_478e4f65654044f1fb361af997fedafa_mafia.exe	86
PID 2512 wrote to memory of 3420	2512	2025-02-02_478e4f65654044f1fb361af997fedafa_mafia.exe	86
PID 2512 wrote to memory of 3420	2512	2025-02-02_478e4f65654044f1fb361af997fedafa_mafia.exe	86
PID 2512 wrote to memory of 2064	2512	2025-02-02_478e4f65654044f1fb361af997fedafa_mafia.exe	88
PID 2512 wrote to memory of 2064	2512	2025-02-02_478e4f65654044f1fb361af997fedafa_mafia.exe	88
PID 2512 wrote to memory of 2064	2512	2025-02-02_478e4f65654044f1fb361af997fedafa_mafia.exe	88
PID 2512 wrote to memory of 3992	2512	2025-02-02_478e4f65654044f1fb361af997fedafa_mafia.exe	90
PID 2512 wrote to memory of 3992	2512	2025-02-02_478e4f65654044f1fb361af997fedafa_mafia.exe	90
PID 2512 wrote to memory of 3992	2512	2025-02-02_478e4f65654044f1fb361af997fedafa_mafia.exe	90
PID 2512 wrote to memory of 2864	2512	2025-02-02_478e4f65654044f1fb361af997fedafa_mafia.exe	92
PID 2512 wrote to memory of 2864	2512	2025-02-02_478e4f65654044f1fb361af997fedafa_mafia.exe	92
PID 2512 wrote to memory of 2864	2512	2025-02-02_478e4f65654044f1fb361af997fedafa_mafia.exe	92
PID 2512 wrote to memory of 2352	2512	2025-02-02_478e4f65654044f1fb361af997fedafa_mafia.exe	94
PID 2512 wrote to memory of 2352	2512	2025-02-02_478e4f65654044f1fb361af997fedafa_mafia.exe	94
PID 2512 wrote to memory of 2352	2512	2025-02-02_478e4f65654044f1fb361af997fedafa_mafia.exe	94
PID 2512 wrote to memory of 2304	2512	2025-02-02_478e4f65654044f1fb361af997fedafa_mafia.exe	97
PID 2512 wrote to memory of 2304	2512	2025-02-02_478e4f65654044f1fb361af997fedafa_mafia.exe	97
PID 2512 wrote to memory of 2304	2512	2025-02-02_478e4f65654044f1fb361af997fedafa_mafia.exe	97
PID 4836 wrote to memory of 1812	4836	nemkupwk.exe	102
PID 4836 wrote to memory of 1812	4836	nemkupwk.exe	102
PID 4836 wrote to memory of 1812	4836	nemkupwk.exe	102
PID 4836 wrote to memory of 1812	4836	nemkupwk.exe	102
PID 4836 wrote to memory of 1812	4836	nemkupwk.exe	102

C:\Users\Admin\AppData\Local\Temp\2025-02-02_478e4f65654044f1fb361af997fedafa_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2025-02-02_478e4f65654044f1fb361af997fedafa_mafia.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2512
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\bzxnvwjp\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3420
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\nemkupwk.exe" C:\Windows\SysWOW64\bzxnvwjp\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2064
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create bzxnvwjp binPath= "C:\Windows\SysWOW64\bzxnvwjp\nemkupwk.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-02-02_478e4f65654044f1fb361af997fedafa_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3992
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description bzxnvwjp "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2864
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start bzxnvwjp
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2352
- 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:2304
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2512 -s 1044
  2⤵
  - Program crash
  PID:1532

C:\Windows\SysWOW64\bzxnvwjp\nemkupwk.exe
C:\Windows\SysWOW64\bzxnvwjp\nemkupwk.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-02-02_478e4f65654044f1fb361af997fedafa_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4836
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:1812
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4836 -s 508
  2⤵
  - Program crash
  PID:1040

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 2512 -ip 2512
1⤵
PID:3440

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4836 -ip 4836
1⤵
PID:452

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\nemkupwk.exe

Filesize
10.0MB

MD5
50b698e84d12e40ff24d8fdea1cc9333

SHA1
9001ad23a671983d2acbc465a7399f132b797a13

SHA256
e487fa73dfebf06670b27ecbdd8c77d67c806f1a68b80e8aa0c11dbcd522a9ee

SHA512
e8abfc8ba55baf8346db5814fc0dc04b0547c4296cacbf64e46ca697087a854f9e22d3b80612b7b765b40b16d7f2bf57482e33f913b2aeaa5c18632c0ca94286

Download Submit
memory/1812-14-0x0000000001220000-0x0000000001235000-memory.dmp

Filesize
84KB

Download
memory/1812-17-0x0000000001220000-0x0000000001235000-memory.dmp

Filesize
84KB

Download
memory/1812-16-0x0000000001220000-0x0000000001235000-memory.dmp

Filesize
84KB

Download
memory/2512-7-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/2512-8-0x0000000000770000-0x0000000000783000-memory.dmp

Filesize
76KB

Download
memory/2512-1-0x00000000007F0000-0x00000000008F0000-memory.dmp

Filesize
1024KB

Download
memory/2512-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2512-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2512-2-0x0000000000770000-0x0000000000783000-memory.dmp

Filesize
76KB

Download
memory/4836-12-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/4836-11-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/4836-13-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/4836-18-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads