tofsee | 3710d6b2b408ece521c4dd9dbbaf3cb4396c10d42acbc0deb98f7f92a76de97a

Analysis

max time kernel
146s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
12/08/2024, 18:46

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General

Target
8fdee8d83874619366764213fcd3af8e_JaffaCakes118.exe
Size 14.3MB
Sample240812-xetwtaydrf
SHA256 3710d6b2b408ece521c4dd9dbbaf3cb4396c10d42acbc0deb98f7f92a76de97a
MD5 8fdee8d83874619366764213fcd3af8e
SHA1 22e413f0941c3c8b3e6c46fde20be41912c004d6
SHA512 574102f2c68a47e4c64177f90dbf1853f5fb1c8644dc33fc7c02b2c47775b1da998c348bebabdf7dd9b5d19f53a674a96b667d39e6c04cfb7a0aa9597ffbb545
SSDEEP 393216:/88888888888888888888888888888888888888888888888888888888888888b:
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

defeatwax.ru
refabyd.info

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan 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
1804	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\lajujsgy\ImagePath = "C:\\Windows\\SysWOW64\\lajujsgy\\lbwicosk.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-1-5-21-2412658365-3084825385-3340777666-1000\Control Panel\International\Geo\Nation	8fdee8d83874619366764213fcd3af8e_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
3536	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4120	lbwicosk.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4120 set thread context of 3536	4120	lbwicosk.exe	107

Launches sc.exe 3 IoCs

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

pid	Process
3252	sc.exe
4608	sc.exe
640	sc.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Event Triggered Execution: Accessibility Features 1 TTPs
Windows contains accessibility features that may be used by adversaries to establish persistence and/or elevate privileges.
persistence privilege_escalation

Accessibility Features
T1546.008

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
1648	3596	WerFault.exe	83
1388	4120	WerFault.exe	101

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	8fdee8d83874619366764213fcd3af8e_JaffaCakes118.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	lbwicosk.exe
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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3596 wrote to memory of 1652	3596	8fdee8d83874619366764213fcd3af8e_JaffaCakes118.exe	87
PID 3596 wrote to memory of 1652	3596	8fdee8d83874619366764213fcd3af8e_JaffaCakes118.exe	87
PID 3596 wrote to memory of 1652	3596	8fdee8d83874619366764213fcd3af8e_JaffaCakes118.exe	87
PID 3596 wrote to memory of 4024	3596	8fdee8d83874619366764213fcd3af8e_JaffaCakes118.exe	89
PID 3596 wrote to memory of 4024	3596	8fdee8d83874619366764213fcd3af8e_JaffaCakes118.exe	89
PID 3596 wrote to memory of 4024	3596	8fdee8d83874619366764213fcd3af8e_JaffaCakes118.exe	89
PID 3596 wrote to memory of 3252	3596	8fdee8d83874619366764213fcd3af8e_JaffaCakes118.exe	93
PID 3596 wrote to memory of 3252	3596	8fdee8d83874619366764213fcd3af8e_JaffaCakes118.exe	93
PID 3596 wrote to memory of 3252	3596	8fdee8d83874619366764213fcd3af8e_JaffaCakes118.exe	93
PID 3596 wrote to memory of 4608	3596	8fdee8d83874619366764213fcd3af8e_JaffaCakes118.exe	95
PID 3596 wrote to memory of 4608	3596	8fdee8d83874619366764213fcd3af8e_JaffaCakes118.exe	95
PID 3596 wrote to memory of 4608	3596	8fdee8d83874619366764213fcd3af8e_JaffaCakes118.exe	95
PID 3596 wrote to memory of 640	3596	8fdee8d83874619366764213fcd3af8e_JaffaCakes118.exe	99
PID 3596 wrote to memory of 640	3596	8fdee8d83874619366764213fcd3af8e_JaffaCakes118.exe	99
PID 3596 wrote to memory of 640	3596	8fdee8d83874619366764213fcd3af8e_JaffaCakes118.exe	99
PID 3596 wrote to memory of 1804	3596	8fdee8d83874619366764213fcd3af8e_JaffaCakes118.exe	102
PID 3596 wrote to memory of 1804	3596	8fdee8d83874619366764213fcd3af8e_JaffaCakes118.exe	102
PID 3596 wrote to memory of 1804	3596	8fdee8d83874619366764213fcd3af8e_JaffaCakes118.exe	102
PID 4120 wrote to memory of 3536	4120	lbwicosk.exe	107
PID 4120 wrote to memory of 3536	4120	lbwicosk.exe	107
PID 4120 wrote to memory of 3536	4120	lbwicosk.exe	107
PID 4120 wrote to memory of 3536	4120	lbwicosk.exe	107
PID 4120 wrote to memory of 3536	4120	lbwicosk.exe	107

C:\Users\Admin\AppData\Local\Temp\8fdee8d83874619366764213fcd3af8e_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\8fdee8d83874619366764213fcd3af8e_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3596
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\lajujsgy\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1652
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\lbwicosk.exe" C:\Windows\SysWOW64\lajujsgy\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4024
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create lajujsgy binPath= "C:\Windows\SysWOW64\lajujsgy\lbwicosk.exe /d\"C:\Users\Admin\AppData\Local\Temp\8fdee8d83874619366764213fcd3af8e_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3252
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description lajujsgy "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4608
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start lajujsgy
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:640
- 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:1804
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3596 -s 1044
  2⤵
  - Program crash
  PID:1648

C:\Windows\SysWOW64\lajujsgy\lbwicosk.exe
C:\Windows\SysWOW64\lajujsgy\lbwicosk.exe /d"C:\Users\Admin\AppData\Local\Temp\8fdee8d83874619366764213fcd3af8e_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4120
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:3536
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4120 -s 532
  2⤵
  - Program crash
  PID:1388

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3596 -ip 3596
1⤵
PID:2572

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4120 -ip 4120
1⤵
PID:4272

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

T1569

Service Execution

T1569.002

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Accessibility Features

T1546.008

Netsh Helper DLL

T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Accessibility Features

T1546.008

Netsh Helper DLL

T1546.007

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

lbwicosk.exe

Path C:\Users\Admin\AppData\Local\Temp\lbwicosk.exe
Size 10.8MB
SHA256 1c965853af0c049a323329049cfe053b858e183cb4abb77d546bfbb749958206
MD5 4d7db47c359454fddc6ff40232d8499b
SHA1 a5e6fbca4b49defe4b80742aff85b0584f7e4ea3
SHA512 3158ac6697205126db8728f13b3804635be3f4ac4dbab65e9ab01c115bc37307124d8c7c12138a4b8d9b5f2fe2b3d4265e8f1154ccaf9191c4c36eec57d876b7
SSDEEP 196608:BV8888888888888888888888888888888888888888888888888888888888888c:r888888888888888888888888888888H
MD5 SHA1 SHA512 SSDEEP

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memory/3536-12-0x0000000000380000-0x0000000000395000-memory.dmp

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memory/3536-15-0x0000000000380000-0x0000000000395000-memory.dmp

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memory/3536-16-0x0000000000380000-0x0000000000395000-memory.dmp

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memory/3596-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

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memory/3596-1-0x0000000000710000-0x0000000000810000-memory.dmp

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memory/3596-4-0x0000000000400000-0x0000000000415000-memory.dmp

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memory/3596-8-0x0000000000400000-0x0000000000459000-memory.dmp

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memory/3596-10-0x0000000000400000-0x0000000000415000-memory.dmp

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memory/3596-9-0x00000000001C0000-0x00000000001D3000-memory.dmp

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memory/4120-11-0x0000000000400000-0x0000000000459000-memory.dmp

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memory/4120-13-0x0000000000400000-0x0000000000459000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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