tofsee | f6321d75861cf235291e85b0737a1dccca1dde649cfe674b48c65cfa6c45b96c

General

Target

2025-01-21_67f32bf9c47840d904272b41465fe81a_mafia.exe
Size

10.2MB
MD5

67f32bf9c47840d904272b41465fe81a
SHA1

ccd07693c4a9e4905824ab263abbcfa9c70d44fa
SHA256

f6321d75861cf235291e85b0737a1dccca1dde649cfe674b48c65cfa6c45b96c
SHA512

26bb5fde8bfeffdbb1a4e34b6d38320b9f034fc2dc15b39bbdcde7d79e9ad20cddbb7a62ec91d0a3bbd7bb6e0ea643115f59a89fe4717ac0a0a9ea340c7e6011
SSDEEP

49152:4qE0YKr3fYPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPn:4qtYc3

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
3376	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\syzvvnin\ImagePath = "C:\\Windows\\SysWOW64\\syzvvnin\\egzkrznd.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-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	2025-01-21_67f32bf9c47840d904272b41465fe81a_mafia.exe

Deletes itself 1 IoCs

pid	Process
980	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2140	egzkrznd.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2140 set thread context of 980	2140	egzkrznd.exe	96

Launches sc.exe 3 IoCs

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

pid	Process
2736	sc.exe
456	sc.exe
4824	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
1240	2140	WerFault.exe	92
1824	5064	WerFault.exe	81

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	egzkrznd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2025-01-21_67f32bf9c47840d904272b41465fe81a_mafia.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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 5064 wrote to memory of 4484	5064	2025-01-21_67f32bf9c47840d904272b41465fe81a_mafia.exe	82
PID 5064 wrote to memory of 4484	5064	2025-01-21_67f32bf9c47840d904272b41465fe81a_mafia.exe	82
PID 5064 wrote to memory of 4484	5064	2025-01-21_67f32bf9c47840d904272b41465fe81a_mafia.exe	82
PID 5064 wrote to memory of 4032	5064	2025-01-21_67f32bf9c47840d904272b41465fe81a_mafia.exe	84
PID 5064 wrote to memory of 4032	5064	2025-01-21_67f32bf9c47840d904272b41465fe81a_mafia.exe	84
PID 5064 wrote to memory of 4032	5064	2025-01-21_67f32bf9c47840d904272b41465fe81a_mafia.exe	84
PID 5064 wrote to memory of 2736	5064	2025-01-21_67f32bf9c47840d904272b41465fe81a_mafia.exe	86
PID 5064 wrote to memory of 2736	5064	2025-01-21_67f32bf9c47840d904272b41465fe81a_mafia.exe	86
PID 5064 wrote to memory of 2736	5064	2025-01-21_67f32bf9c47840d904272b41465fe81a_mafia.exe	86
PID 5064 wrote to memory of 456	5064	2025-01-21_67f32bf9c47840d904272b41465fe81a_mafia.exe	88
PID 5064 wrote to memory of 456	5064	2025-01-21_67f32bf9c47840d904272b41465fe81a_mafia.exe	88
PID 5064 wrote to memory of 456	5064	2025-01-21_67f32bf9c47840d904272b41465fe81a_mafia.exe	88
PID 5064 wrote to memory of 4824	5064	2025-01-21_67f32bf9c47840d904272b41465fe81a_mafia.exe	90
PID 5064 wrote to memory of 4824	5064	2025-01-21_67f32bf9c47840d904272b41465fe81a_mafia.exe	90
PID 5064 wrote to memory of 4824	5064	2025-01-21_67f32bf9c47840d904272b41465fe81a_mafia.exe	90
PID 5064 wrote to memory of 3376	5064	2025-01-21_67f32bf9c47840d904272b41465fe81a_mafia.exe	93
PID 5064 wrote to memory of 3376	5064	2025-01-21_67f32bf9c47840d904272b41465fe81a_mafia.exe	93
PID 5064 wrote to memory of 3376	5064	2025-01-21_67f32bf9c47840d904272b41465fe81a_mafia.exe	93
PID 2140 wrote to memory of 980	2140	egzkrznd.exe	96
PID 2140 wrote to memory of 980	2140	egzkrznd.exe	96
PID 2140 wrote to memory of 980	2140	egzkrznd.exe	96
PID 2140 wrote to memory of 980	2140	egzkrznd.exe	96
PID 2140 wrote to memory of 980	2140	egzkrznd.exe	96

C:\Users\Admin\AppData\Local\Temp\2025-01-21_67f32bf9c47840d904272b41465fe81a_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2025-01-21_67f32bf9c47840d904272b41465fe81a_mafia.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5064
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\syzvvnin\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4484
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\egzkrznd.exe" C:\Windows\SysWOW64\syzvvnin\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4032
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create syzvvnin binPath= "C:\Windows\SysWOW64\syzvvnin\egzkrznd.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-01-21_67f32bf9c47840d904272b41465fe81a_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2736
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description syzvvnin "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:456
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start syzvvnin
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4824
- 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:3376
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5064 -s 784
  2⤵
  - Program crash
  PID:1824

C:\Windows\SysWOW64\syzvvnin\egzkrznd.exe
C:\Windows\SysWOW64\syzvvnin\egzkrznd.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-01-21_67f32bf9c47840d904272b41465fe81a_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2140
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:980
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2140 -s 516
  2⤵
  - Program crash
  PID:1240

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 5064 -ip 5064
1⤵
PID:2492

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 492 -p 2140 -ip 2140
1⤵
PID:4828

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\egzkrznd.exe

Filesize
10.7MB

MD5
bffd8c5db26d1fd2963ee819b9a960f5

SHA1
45c78c56eec3ff3ea6e3c03fd26e64fd6829b8ea

SHA256
d4859bd62d301b90904668ef4f9e3588d2e20c8f5f510874cf692998f642b91a

SHA512
0c279f9873676616f6ae56acfe7ff544eac43ab37afa14333042e57d3a0533bbf7974fa5f80698db32c31cd2bd9f412dab27fe2d4be2c8084f53ec20a83f94a0

Download Submit
memory/980-8-0x0000000000370000-0x0000000000385000-memory.dmp

Filesize
84KB

Download
memory/980-14-0x0000000000370000-0x0000000000385000-memory.dmp

Filesize
84KB

Download
memory/980-15-0x0000000000370000-0x0000000000385000-memory.dmp

Filesize
84KB

Download
memory/2140-10-0x0000000000400000-0x0000000002DC3000-memory.dmp

Filesize
41.8MB

Download
memory/5064-1-0x0000000002DD0000-0x0000000002ED0000-memory.dmp

Filesize
1024KB

Download
memory/5064-2-0x0000000003210000-0x0000000003223000-memory.dmp

Filesize
76KB

Download
memory/5064-4-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/5064-13-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/5064-12-0x0000000003210000-0x0000000003223000-memory.dmp

Filesize
76KB

Download
memory/5064-11-0x0000000000400000-0x0000000002DC3000-memory.dmp

Filesize
41.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads