2a17e3086c909b6f21fc681ded7cad0f85c308118691899b181948cb4a11d81c

Reason

Machine shutdown

General

Target

Wolfteam/python27.dll
Size

2.4MB
MD5

da8b71b282bb2c3e0ac3e0465e592e5d
SHA1

f3eaa7956a42dd65dc008d5621263ae4155eb204
SHA256

6c771faf75ac68d28f83509fc113288035978122dc49de8936d9011e0a9b20ab
SHA512

aa5c9c305b7d01eed4ed90afde0e4964071279ba64d0c5fa5743c70ecc039a841e437c6f850b5fdd770e61907aa55a98643545b1615829d4e420aac3eb133663

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 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid pid_target process target process

1868 1420 WerFault.exe rundll32.exe
3980 1420 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
1868	1420	WerFault.exe	rundll32.exe
3980	1420	WerFault.exe	rundll32.exe

Modifies data under HKEY_USERS 15 IoCs

Processes:

LogonUI.exe

description	ioc	process
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\CurrentVersion\Explorer\Accent\AccentColorMenu = "4292311040"	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\ColorizationGlassAttribute = "1"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM	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
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History	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\ColorizationColorBalance = "89"	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\Themes\History\AutoColor = "0"	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\ColorizationAfterglowBalance = "10"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationBlurBalance = "1"	LogonUI.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

Processes:

WerFault.exe

pid	process
1868	WerFault.exe
1868	WerFault.exe
1868	WerFault.exe
1868	WerFault.exe
1868	WerFault.exe
1868	WerFault.exe
1868	WerFault.exe
1868	WerFault.exe
1868	WerFault.exe
1868	WerFault.exe
1868	WerFault.exe
1868	WerFault.exe
1868	WerFault.exe
1868	WerFault.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

WerFault.exe

description pid process

Token: SeRestorePrivilege 1868 WerFault.exe
Token: SeBackupPrivilege 1868 WerFault.exe
Token: SeDebugPrivilege 1868 WerFault.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

LogonUI.exe

pid process

2072 LogonUI.exe
2072 LogonUI.exe

description	pid	process
Token: SeRestorePrivilege	1868	WerFault.exe
Token: SeBackupPrivilege	1868	WerFault.exe
Token: SeDebugPrivilege	1868	WerFault.exe

pid	process
2072	LogonUI.exe
2072	LogonUI.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

rundll32.exe

description	pid	process	target process
PID 1144 wrote to memory of 1420	1144	rundll32.exe	rundll32.exe
PID 1144 wrote to memory of 1420	1144	rundll32.exe	rundll32.exe
PID 1144 wrote to memory of 1420	1144	rundll32.exe	rundll32.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\Wolfteam\python27.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1144

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\Wolfteam\python27.dll,#1
2⤵
PID:1420

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1420 -s 628
3⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1868

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1420 -s 628
3⤵
- Program crash
PID:3980

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x0 /state0:0xa3ad4055 /state1:0x41c64e6d
1⤵
- Modifies WinLogon to allow AutoLogon
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:2072

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/1420-2-0x0000000000000000-mapping.dmp

Download
memory/1868-3-0x0000000004BD0000-0x0000000004BD1000-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