tofsee | 17afeb97d4656c3c6543c32937673c8d0996e2b852811995f998bb44811fc393

General

Target

2024-12-25_40de753ae75251c4ba1910408ad71dfc_mafia.exe
Size

13.5MB
MD5

40de753ae75251c4ba1910408ad71dfc
SHA1

7842fa9f32079e5b5525d77d1c1d7a87da02b340
SHA256

17afeb97d4656c3c6543c32937673c8d0996e2b852811995f998bb44811fc393
SHA512

39ef9e23243ad5489a253457fa77f02a6695cea351f8a63b66e36dff76c5dfc198253decf7268f1b28bd8e296ea4d484f7d6aac4eed5b0cc05629a36f2c1cd58
SSDEEP

3072:vLBgXOXcdW8tar7vGdq8c7YMl2b8anmMXnb58XuDP9het3Zv1oSW1za2E+w5C2/Y:mOMdRQr7OB0ypmMXnl8XEPM3noSWOC

Score

10^/10

tofsee discovery evasion 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

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
2692	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\kfjleopz\ImagePath = "C:\\Windows\\SysWOW64\\kfjleopz\\ktnskjea.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-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation	2024-12-25_40de753ae75251c4ba1910408ad71dfc_mafia.exe

Deletes itself 1 IoCs

pid	Process
2056	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4500	ktnskjea.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4500 set thread context of 2056	4500	ktnskjea.exe	98

Launches sc.exe 3 IoCs

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

pid	Process
404	sc.exe
3728	sc.exe
1044	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
1864	2888	WerFault.exe	81
4404	4500	WerFault.exe	92

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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ktnskjea.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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2024-12-25_40de753ae75251c4ba1910408ad71dfc_mafia.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 2888 wrote to memory of 1400	2888	2024-12-25_40de753ae75251c4ba1910408ad71dfc_mafia.exe	82
PID 2888 wrote to memory of 1400	2888	2024-12-25_40de753ae75251c4ba1910408ad71dfc_mafia.exe	82
PID 2888 wrote to memory of 1400	2888	2024-12-25_40de753ae75251c4ba1910408ad71dfc_mafia.exe	82
PID 2888 wrote to memory of 2452	2888	2024-12-25_40de753ae75251c4ba1910408ad71dfc_mafia.exe	84
PID 2888 wrote to memory of 2452	2888	2024-12-25_40de753ae75251c4ba1910408ad71dfc_mafia.exe	84
PID 2888 wrote to memory of 2452	2888	2024-12-25_40de753ae75251c4ba1910408ad71dfc_mafia.exe	84
PID 2888 wrote to memory of 404	2888	2024-12-25_40de753ae75251c4ba1910408ad71dfc_mafia.exe	86
PID 2888 wrote to memory of 404	2888	2024-12-25_40de753ae75251c4ba1910408ad71dfc_mafia.exe	86
PID 2888 wrote to memory of 404	2888	2024-12-25_40de753ae75251c4ba1910408ad71dfc_mafia.exe	86
PID 2888 wrote to memory of 3728	2888	2024-12-25_40de753ae75251c4ba1910408ad71dfc_mafia.exe	88
PID 2888 wrote to memory of 3728	2888	2024-12-25_40de753ae75251c4ba1910408ad71dfc_mafia.exe	88
PID 2888 wrote to memory of 3728	2888	2024-12-25_40de753ae75251c4ba1910408ad71dfc_mafia.exe	88
PID 2888 wrote to memory of 1044	2888	2024-12-25_40de753ae75251c4ba1910408ad71dfc_mafia.exe	90
PID 2888 wrote to memory of 1044	2888	2024-12-25_40de753ae75251c4ba1910408ad71dfc_mafia.exe	90
PID 2888 wrote to memory of 1044	2888	2024-12-25_40de753ae75251c4ba1910408ad71dfc_mafia.exe	90
PID 2888 wrote to memory of 2692	2888	2024-12-25_40de753ae75251c4ba1910408ad71dfc_mafia.exe	93
PID 2888 wrote to memory of 2692	2888	2024-12-25_40de753ae75251c4ba1910408ad71dfc_mafia.exe	93
PID 2888 wrote to memory of 2692	2888	2024-12-25_40de753ae75251c4ba1910408ad71dfc_mafia.exe	93
PID 4500 wrote to memory of 2056	4500	ktnskjea.exe	98
PID 4500 wrote to memory of 2056	4500	ktnskjea.exe	98
PID 4500 wrote to memory of 2056	4500	ktnskjea.exe	98
PID 4500 wrote to memory of 2056	4500	ktnskjea.exe	98
PID 4500 wrote to memory of 2056	4500	ktnskjea.exe	98

C:\Users\Admin\AppData\Local\Temp\2024-12-25_40de753ae75251c4ba1910408ad71dfc_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2024-12-25_40de753ae75251c4ba1910408ad71dfc_mafia.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2888
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\kfjleopz\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1400
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ktnskjea.exe" C:\Windows\SysWOW64\kfjleopz\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2452
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create kfjleopz binPath= "C:\Windows\SysWOW64\kfjleopz\ktnskjea.exe /d\"C:\Users\Admin\AppData\Local\Temp\2024-12-25_40de753ae75251c4ba1910408ad71dfc_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:404
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description kfjleopz "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3728
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start kfjleopz
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1044
- 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:2692
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2888 -s 1288
  2⤵
  - Program crash
  PID:1864

C:\Windows\SysWOW64\kfjleopz\ktnskjea.exe
C:\Windows\SysWOW64\kfjleopz\ktnskjea.exe /d"C:\Users\Admin\AppData\Local\Temp\2024-12-25_40de753ae75251c4ba1910408ad71dfc_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4500
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2056
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4500 -s 560
  2⤵
  - Program crash
  PID:4404

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 2888 -ip 2888
1⤵
PID:2308

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 4500 -ip 4500
1⤵
PID:1144

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\ktnskjea.exe

Filesize
10.7MB

MD5
ede0c377951c2147c1754b3d164e1589

SHA1
2cdaa5d37b952b90a43e890dd5159342e1fac819

SHA256
a46ee6539a28820654579eea5a8260fe64fb5b388317577982da2f079db492f3

SHA512
46d1ecd34887cbd731e9e7db7b0aa31ecaad262466b36d2e00ab95203627b65e5969e48cf10921b4d00fbf9ffa04abbe1ad78e872d77bc177819fc9b7d48acbc

Download Submit
memory/2056-16-0x0000000000550000-0x0000000000565000-memory.dmp

Filesize
84KB

Download
memory/2056-17-0x0000000000550000-0x0000000000565000-memory.dmp

Filesize
84KB

Download
memory/2056-14-0x0000000000550000-0x0000000000565000-memory.dmp

Filesize
84KB

Download
memory/2888-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2888-8-0x0000000000490000-0x00000000004A3000-memory.dmp

Filesize
76KB

Download
memory/2888-1-0x00000000005F0000-0x00000000006F0000-memory.dmp

Filesize
1024KB

Download
memory/2888-7-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/2888-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2888-2-0x0000000000490000-0x00000000004A3000-memory.dmp

Filesize
76KB

Download
memory/4500-11-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/4500-12-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/4500-13-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/4500-19-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads