2a17e3086c909b6f21fc681ded7cad0f85c308118691899b181948cb4a11d81c

Reason

Machine shutdown

General

Target

Wolfteam/api_ms_win_core_interlocked_l1_1_0.dll
Size

19KB
MD5

aebb266ad5e92fdfabb4b21ce973ff51
SHA1

018a5ebf9dc68cfe243d6ab2a2ec6f9371804110
SHA256

7e58e8c6140bb8108e284b364261842a5fd19fa37c30e5dd3501669d8fd5108a
SHA512

d9fe0a673128bcb289ffb5f7799afb79e642997acb7ca3a3cfd165b9dd029ce40d98e7659eaa94cef39964d3d89af3bd1d44a220c246d73f08ba9642ec0b06d9

Score

8^/10

bootkit ransomware

Malware Config

Signatures

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
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

3604 1236 WerFault.exe rundll32.exe

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

pid	pid_target	process	target process
3604	1236	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\CurrentVersion\Explorer\Accent	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\CurrentVersion\Explorer\Accent\AccentColorMenu = "4292311040"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglowBalance = "10"	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\DWM\ColorizationBlurBalance = "1"	LogonUI.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentPalette = a6d8ff0076b9ed00429ce3000078d700005a9e000042750000264200f7630c00	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColor = "3288365271"	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\EnableWindowColorization = "1"	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\AccentColor = "4292311040"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColorBalance = "89"	LogonUI.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

Processes:

WerFault.exe

pid	process
3604	WerFault.exe
3604	WerFault.exe
3604	WerFault.exe
3604	WerFault.exe
3604	WerFault.exe
3604	WerFault.exe
3604	WerFault.exe
3604	WerFault.exe
3604	WerFault.exe
3604	WerFault.exe
3604	WerFault.exe
3604	WerFault.exe
3604	WerFault.exe
3604	WerFault.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

WerFault.exe

description pid process

Token: SeRestorePrivilege 3604 WerFault.exe
Token: SeBackupPrivilege 3604 WerFault.exe
Token: SeDebugPrivilege 3604 WerFault.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

LogonUI.exe

pid process

3828 LogonUI.exe
3828 LogonUI.exe

description	pid	process
Token: SeRestorePrivilege	3604	WerFault.exe
Token: SeBackupPrivilege	3604	WerFault.exe
Token: SeDebugPrivilege	3604	WerFault.exe

pid	process
3828	LogonUI.exe
3828	LogonUI.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

rundll32.exe

description	pid	process	target process
PID 3116 wrote to memory of 1236	3116	rundll32.exe	rundll32.exe
PID 3116 wrote to memory of 1236	3116	rundll32.exe	rundll32.exe
PID 3116 wrote to memory of 1236	3116	rundll32.exe	rundll32.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\Wolfteam\api_ms_win_core_interlocked_l1_1_0.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3116

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\Wolfteam\api_ms_win_core_interlocked_l1_1_0.dll,#1
2⤵
PID:1236

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1236 -s 616
3⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3604

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x0 /state0:0xa3ad4855 /state1:0x41c64e6d
1⤵
- Modifies WinLogon to allow AutoLogon
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:3828

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

1

T1004

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1236-2-0x0000000000000000-mapping.dmp

Download
memory/3604-3-0x0000000004B40000-0x0000000004B41000-memory.dmp

Filesize
4KB

Download
memory/3604-4-0x0000000004F40000-0x0000000004F41000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

Errors

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads