tofsee | ac37be5711de20cc3dc8083e7cb353a3b142c49855d407a95d7492c44c59aa74

General

Target

2025-01-22_479a4e5f3194140652f6aed2b1b8d282_mafia.exe
Size

12.5MB
MD5

479a4e5f3194140652f6aed2b1b8d282
SHA1

3c76a31492c9ff4018bfb79bc93d83eaf347ba68
SHA256

ac37be5711de20cc3dc8083e7cb353a3b142c49855d407a95d7492c44c59aa74
SHA512

cadd328420e04973fb536a2a9d9c463dadffb4a73398ad5826aa6b21065fc205724b2e023358e47668d7ee11519cccb1f624432dd552b277f831025ba2264adc
SSDEEP

49152:1qE0YKr3fYPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPn:1qtYc3

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
1288	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\clevkrsz\ImagePath = "C:\\Windows\\SysWOW64\\clevkrsz\\yxlnbyzr.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-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	2025-01-22_479a4e5f3194140652f6aed2b1b8d282_mafia.exe

Deletes itself 1 IoCs

pid	Process
2696	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2484	yxlnbyzr.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2484 set thread context of 2696	2484	yxlnbyzr.exe	98

Launches sc.exe 3 IoCs

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

pid	Process
2108	sc.exe
3724	sc.exe
972	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
4744	2484	WerFault.exe	94
2624	1104	WerFault.exe	82

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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	yxlnbyzr.exe
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	2025-01-22_479a4e5f3194140652f6aed2b1b8d282_mafia.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1104 wrote to memory of 3512	1104	2025-01-22_479a4e5f3194140652f6aed2b1b8d282_mafia.exe	83
PID 1104 wrote to memory of 3512	1104	2025-01-22_479a4e5f3194140652f6aed2b1b8d282_mafia.exe	83
PID 1104 wrote to memory of 3512	1104	2025-01-22_479a4e5f3194140652f6aed2b1b8d282_mafia.exe	83
PID 1104 wrote to memory of 4624	1104	2025-01-22_479a4e5f3194140652f6aed2b1b8d282_mafia.exe	85
PID 1104 wrote to memory of 4624	1104	2025-01-22_479a4e5f3194140652f6aed2b1b8d282_mafia.exe	85
PID 1104 wrote to memory of 4624	1104	2025-01-22_479a4e5f3194140652f6aed2b1b8d282_mafia.exe	85
PID 1104 wrote to memory of 2108	1104	2025-01-22_479a4e5f3194140652f6aed2b1b8d282_mafia.exe	87
PID 1104 wrote to memory of 2108	1104	2025-01-22_479a4e5f3194140652f6aed2b1b8d282_mafia.exe	87
PID 1104 wrote to memory of 2108	1104	2025-01-22_479a4e5f3194140652f6aed2b1b8d282_mafia.exe	87
PID 1104 wrote to memory of 3724	1104	2025-01-22_479a4e5f3194140652f6aed2b1b8d282_mafia.exe	89
PID 1104 wrote to memory of 3724	1104	2025-01-22_479a4e5f3194140652f6aed2b1b8d282_mafia.exe	89
PID 1104 wrote to memory of 3724	1104	2025-01-22_479a4e5f3194140652f6aed2b1b8d282_mafia.exe	89
PID 1104 wrote to memory of 972	1104	2025-01-22_479a4e5f3194140652f6aed2b1b8d282_mafia.exe	92
PID 1104 wrote to memory of 972	1104	2025-01-22_479a4e5f3194140652f6aed2b1b8d282_mafia.exe	92
PID 1104 wrote to memory of 972	1104	2025-01-22_479a4e5f3194140652f6aed2b1b8d282_mafia.exe	92
PID 1104 wrote to memory of 1288	1104	2025-01-22_479a4e5f3194140652f6aed2b1b8d282_mafia.exe	95
PID 1104 wrote to memory of 1288	1104	2025-01-22_479a4e5f3194140652f6aed2b1b8d282_mafia.exe	95
PID 1104 wrote to memory of 1288	1104	2025-01-22_479a4e5f3194140652f6aed2b1b8d282_mafia.exe	95
PID 2484 wrote to memory of 2696	2484	yxlnbyzr.exe	98
PID 2484 wrote to memory of 2696	2484	yxlnbyzr.exe	98
PID 2484 wrote to memory of 2696	2484	yxlnbyzr.exe	98
PID 2484 wrote to memory of 2696	2484	yxlnbyzr.exe	98
PID 2484 wrote to memory of 2696	2484	yxlnbyzr.exe	98

C:\Users\Admin\AppData\Local\Temp\2025-01-22_479a4e5f3194140652f6aed2b1b8d282_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2025-01-22_479a4e5f3194140652f6aed2b1b8d282_mafia.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1104
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\clevkrsz\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3512
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\yxlnbyzr.exe" C:\Windows\SysWOW64\clevkrsz\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4624
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create clevkrsz binPath= "C:\Windows\SysWOW64\clevkrsz\yxlnbyzr.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-01-22_479a4e5f3194140652f6aed2b1b8d282_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2108
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description clevkrsz "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3724
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start clevkrsz
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:972
- 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:1288
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1104 -s 1036
  2⤵
  - Program crash
  PID:2624

C:\Windows\SysWOW64\clevkrsz\yxlnbyzr.exe
C:\Windows\SysWOW64\clevkrsz\yxlnbyzr.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-01-22_479a4e5f3194140652f6aed2b1b8d282_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2484
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2696
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2484 -s 532
  2⤵
  - Program crash
  PID:4744

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 2484 -ip 2484
1⤵
PID:312

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 1104 -ip 1104
1⤵
PID:944

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\yxlnbyzr.exe

Filesize
14.4MB

MD5
898f8b76a4b79853b2483f0d96d55db8

SHA1
18d283e2c9076d72a2f218517d83aedf04ca031f

SHA256
764de042f5f83bc6e5b7f9e4843b783a4e1aebe7e0d9bc4a3eb6ae9f849607f0

SHA512
bda64aa2d29ca562d5fcb4b164a42f989b6dbad288b93c979d54f6b96c9db7cf8ee4e7b9222f74100d000ba47e63ae4119c9bddf3bfe711539e93510fe996c4e

Download Submit
memory/1104-1-0x0000000002E50000-0x0000000002F50000-memory.dmp

Filesize
1024KB

Download
memory/1104-2-0x0000000002E10000-0x0000000002E23000-memory.dmp

Filesize
76KB

Download
memory/1104-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1104-13-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1104-12-0x0000000002E10000-0x0000000002E23000-memory.dmp

Filesize
76KB

Download
memory/1104-11-0x0000000000400000-0x0000000002DC3000-memory.dmp

Filesize
41.8MB

Download
memory/2484-10-0x0000000000400000-0x0000000002DC3000-memory.dmp

Filesize
41.8MB

Download
memory/2696-8-0x0000000000D40000-0x0000000000D55000-memory.dmp

Filesize
84KB

Download
memory/2696-14-0x0000000000D40000-0x0000000000D55000-memory.dmp

Filesize
84KB

Download
memory/2696-15-0x0000000000D40000-0x0000000000D55000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads