tofsee | 123df46c13877e2d95b175eb0dbcc81575e88ac10e977b9908d006b3d5112b6d

General

Target

2025-01-26_a68c1be1027f4baebdbddb4f8e96237a_mafia.exe
Size

12.7MB
MD5

a68c1be1027f4baebdbddb4f8e96237a
SHA1

5f8a6c663aff8f3759cfba2cbccb607685b13ab1
SHA256

123df46c13877e2d95b175eb0dbcc81575e88ac10e977b9908d006b3d5112b6d
SHA512

b99adaeeffabb56637a5a5718ce348f9f6cb45c163d45bd08e1d18dc28b31a9446fe605b48edd94515e1d0500b0ed519cac7680630ea34d56084a964fe222195
SSDEEP

24576:GEfmTNIkv/ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZB:/fot

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
1140	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\guhcsvjt\ImagePath = "C:\\Windows\\SysWOW64\\guhcsvjt\\sstezayg.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-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	2025-01-26_a68c1be1027f4baebdbddb4f8e96237a_mafia.exe

Deletes itself 1 IoCs

pid	Process
448	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
5012	sstezayg.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5012 set thread context of 448	5012	sstezayg.exe	106

Launches sc.exe 3 IoCs

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

pid	Process
4928	sc.exe
1192	sc.exe
2728	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
2936	4916	WerFault.exe	82
4620	5012	WerFault.exe	94

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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sstezayg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2025-01-26_a68c1be1027f4baebdbddb4f8e96237a_mafia.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4916 wrote to memory of 2300	4916	2025-01-26_a68c1be1027f4baebdbddb4f8e96237a_mafia.exe	84
PID 4916 wrote to memory of 2300	4916	2025-01-26_a68c1be1027f4baebdbddb4f8e96237a_mafia.exe	84
PID 4916 wrote to memory of 2300	4916	2025-01-26_a68c1be1027f4baebdbddb4f8e96237a_mafia.exe	84
PID 4916 wrote to memory of 2460	4916	2025-01-26_a68c1be1027f4baebdbddb4f8e96237a_mafia.exe	86
PID 4916 wrote to memory of 2460	4916	2025-01-26_a68c1be1027f4baebdbddb4f8e96237a_mafia.exe	86
PID 4916 wrote to memory of 2460	4916	2025-01-26_a68c1be1027f4baebdbddb4f8e96237a_mafia.exe	86
PID 4916 wrote to memory of 4928	4916	2025-01-26_a68c1be1027f4baebdbddb4f8e96237a_mafia.exe	88
PID 4916 wrote to memory of 4928	4916	2025-01-26_a68c1be1027f4baebdbddb4f8e96237a_mafia.exe	88
PID 4916 wrote to memory of 4928	4916	2025-01-26_a68c1be1027f4baebdbddb4f8e96237a_mafia.exe	88
PID 4916 wrote to memory of 1192	4916	2025-01-26_a68c1be1027f4baebdbddb4f8e96237a_mafia.exe	90
PID 4916 wrote to memory of 1192	4916	2025-01-26_a68c1be1027f4baebdbddb4f8e96237a_mafia.exe	90
PID 4916 wrote to memory of 1192	4916	2025-01-26_a68c1be1027f4baebdbddb4f8e96237a_mafia.exe	90
PID 4916 wrote to memory of 2728	4916	2025-01-26_a68c1be1027f4baebdbddb4f8e96237a_mafia.exe	92
PID 4916 wrote to memory of 2728	4916	2025-01-26_a68c1be1027f4baebdbddb4f8e96237a_mafia.exe	92
PID 4916 wrote to memory of 2728	4916	2025-01-26_a68c1be1027f4baebdbddb4f8e96237a_mafia.exe	92
PID 4916 wrote to memory of 1140	4916	2025-01-26_a68c1be1027f4baebdbddb4f8e96237a_mafia.exe	97
PID 4916 wrote to memory of 1140	4916	2025-01-26_a68c1be1027f4baebdbddb4f8e96237a_mafia.exe	97
PID 4916 wrote to memory of 1140	4916	2025-01-26_a68c1be1027f4baebdbddb4f8e96237a_mafia.exe	97
PID 5012 wrote to memory of 448	5012	sstezayg.exe	106
PID 5012 wrote to memory of 448	5012	sstezayg.exe	106
PID 5012 wrote to memory of 448	5012	sstezayg.exe	106
PID 5012 wrote to memory of 448	5012	sstezayg.exe	106
PID 5012 wrote to memory of 448	5012	sstezayg.exe	106

C:\Users\Admin\AppData\Local\Temp\2025-01-26_a68c1be1027f4baebdbddb4f8e96237a_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2025-01-26_a68c1be1027f4baebdbddb4f8e96237a_mafia.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4916
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\guhcsvjt\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2300
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\sstezayg.exe" C:\Windows\SysWOW64\guhcsvjt\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2460
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create guhcsvjt binPath= "C:\Windows\SysWOW64\guhcsvjt\sstezayg.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-01-26_a68c1be1027f4baebdbddb4f8e96237a_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4928
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description guhcsvjt "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1192
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start guhcsvjt
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2728
- 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:1140
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4916 -s 1148
  2⤵
  - Program crash
  PID:2936

C:\Windows\SysWOW64\guhcsvjt\sstezayg.exe
C:\Windows\SysWOW64\guhcsvjt\sstezayg.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-01-26_a68c1be1027f4baebdbddb4f8e96237a_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5012
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:448
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5012 -s 512
  2⤵
  - Program crash
  PID:4620

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4916 -ip 4916
1⤵
PID:4580

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 5012 -ip 5012
1⤵
PID:212

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\sstezayg.exe

Filesize
13.8MB

MD5
57618018bff11f4fb21a705b277663ba

SHA1
f9ea0bb9cf42702a4e7aabc1a415a05a6aa40e6c

SHA256
3f097bb69dffafcfd2eb6c2d865b2a654801858fd065a4c075dd8db0225733b1

SHA512
78745bbcc0106bfce49035b6bd1aa754f561bc00fb25866c04e078a7a20e3643c147f0744369dbab2ac4df5615132147a7b685d8fd87a16c7d01428e08c8e0ee

Download Submit
memory/448-14-0x00000000008E0000-0x00000000008F5000-memory.dmp

Filesize
84KB

Download
memory/448-17-0x00000000008E0000-0x00000000008F5000-memory.dmp

Filesize
84KB

Download
memory/448-16-0x00000000008E0000-0x00000000008F5000-memory.dmp

Filesize
84KB

Download
memory/4916-8-0x0000000000520000-0x0000000000533000-memory.dmp

Filesize
76KB

Download
memory/4916-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4916-1-0x00000000006F0000-0x00000000007F0000-memory.dmp

Filesize
1024KB

Download
memory/4916-7-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/4916-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4916-2-0x0000000000520000-0x0000000000533000-memory.dmp

Filesize
76KB

Download
memory/5012-12-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/5012-13-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/5012-11-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/5012-19-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads