136732bcc1eb394bab3187dbaa0bb1093d200e1351dae7f8f863c5aa3b07874b

Reason

Machine shutdown

General

Target

memedora.dll
Size

8.6MB
MD5

5a0808d43c4f049810a752ebf1298d6c
SHA1

7a08df0595fe3142b4a95391743c09e43feb60e1
SHA256

136732bcc1eb394bab3187dbaa0bb1093d200e1351dae7f8f863c5aa3b07874b
SHA512

7db49ed728b4a740911391f91bfcf4c2cbd96a4c9124d52d4d46065694bd93d2c414c8d77d66ee83aa69f22160169cb67b76c0c290e508917164323e77328103

Score

10^/10

bootkit ransomware

Malware Config

Signatures

Suspicious use of NtCreateProcessExOtherParentProcess 1 IoCs

Processes:

WerFault.exe

description pid process target process

PID 676 created 1228 676 WerFault.exe rundll32.exe
Modifies WinLogon to allow AutoLogon 2 TTPs 1 IoCs
Enables rebooting of the machine without requiring login credentials.
ransomware bootkit

Winlogon Helper DLL
T1004

Modify Registry
T1112

Processes:

LogonUI.exe

description ioc process

Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\AutoLogonChecked LogonUI.exe
Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

Processes:

rundll32.exe

pid process

1228 rundll32.exe
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

676 1228 WerFault.exe rundll32.exe

description	pid	process	target process
PID 676 created 1228	676	WerFault.exe	rundll32.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\AutoLogonChecked	LogonUI.exe

pid	process
1228	rundll32.exe

pid	pid_target	process	target process
676	1228	WerFault.exe	rundll32.exe

Modifies data under HKEY_USERS 15 IoCs

Processes:

LogonUI.exe

description	ioc	process
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\AccentColor = "4292311040"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglow = "3288365271"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationBlurBalance = "1"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\EnableWindowColorization = "1"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\StartColorMenu = "4288567808"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentColorMenu = "4292311040"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColorBalance = "89"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationGlassAttribute = "1"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglowBalance = "10"	LogonUI.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentPalette = a6d8ff0076b9ed00429ce3000078d700005a9e000042750000264200f7630c00	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History\AutoColor = "0"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColor = "3288365271"	LogonUI.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

Processes:

WerFault.exe

pid	process
676	WerFault.exe
676	WerFault.exe
676	WerFault.exe
676	WerFault.exe
676	WerFault.exe
676	WerFault.exe
676	WerFault.exe
676	WerFault.exe
676	WerFault.exe
676	WerFault.exe
676	WerFault.exe
676	WerFault.exe
676	WerFault.exe
676	WerFault.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

WerFault.exe

description pid process

Token: SeRestorePrivilege 676 WerFault.exe
Token: SeBackupPrivilege 676 WerFault.exe
Token: SeDebugPrivilege 676 WerFault.exe
Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

WerFault.exe

pid process

676 WerFault.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

LogonUI.exe

pid process

2632 LogonUI.exe
2632 LogonUI.exe

description	pid	process
Token: SeRestorePrivilege	676	WerFault.exe
Token: SeBackupPrivilege	676	WerFault.exe
Token: SeDebugPrivilege	676	WerFault.exe

pid	process
2632	LogonUI.exe
2632	LogonUI.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

rundll32.exe

description	pid	process	target process
PID 492 wrote to memory of 1228	492	rundll32.exe	rundll32.exe
PID 492 wrote to memory of 1228	492	rundll32.exe	rundll32.exe
PID 492 wrote to memory of 1228	492	rundll32.exe	rundll32.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\memedora.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:492

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\memedora.dll,#1
2⤵
- Suspicious use of NtCreateThreadExHideFromDebugger
PID:1228

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1228 -s 1372
3⤵
- Suspicious use of NtCreateProcessExOtherParentProcess
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
PID:676

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x0 /state0:0xa3ad2855 /state1:0x41c64e6d
1⤵
- Modifies WinLogon to allow AutoLogon
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:2632

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

1

T1004

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

memory/676-5-0x00000000043E0000-0x00000000043E1000-memory.dmp

Filesize
4KB

Download
memory/1228-2-0x0000000000000000-mapping.dmp

Download
memory/1228-3-0x0000000005A80000-0x0000000005A81000-memory.dmp

Filesize
4KB

Download
memory/1228-4-0x0000000005A80000-0x0000000005A81000-memory.dmp

Filesize
4KB

Download
memory/1228-6-0x0000000004DC0000-0x00000000055A2000-memory.dmp

Filesize
7.9MB

Download
memory/1228-7-0x00000000055C0000-0x00000000055C1000-memory.dmp

Filesize
4KB

Download
memory/1228-8-0x00000000055B0000-0x00000000055B1000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

Errors

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads