e6cd1af91356aeab2550acec945681ed5e82eb9660936b4f4e73509c0c602aae

Resubmissions

17-01-2021 17:17

210117-b2cpxhh15x 8

07-01-2021 16:41

210107-w4e2crkbb6 8

Analysis

max time kernel
39s
max time network
42s
platform
windows10_x64
resource
win10v20201028
submitted
17-01-2021 17:17

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Reason

Machine shutdown

Report Analysis Logs

General

Target

VTPatcher.exe
Size

123KB
MD5

887f4256e86487df513fc0f91f5e6cb7
SHA1

892ca49a0108af495a31fd6d225915d62ec2d136
SHA256

e6cd1af91356aeab2550acec945681ed5e82eb9660936b4f4e73509c0c602aae
SHA512

123c19f36c19b93f216a56b394fd4c4ffaf1ae18438b8d916e5278d5355b7b20a9a7f12f56dacd6d741932ef5d036304b966aa93f540578f177961453e229915

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

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

Modifies data under HKEY_USERS 15 IoCs

Processes:

LogonUI.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationBlurBalance = "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\CurrentVersion\Themes\History\AutoColor = "0"	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\AccentColor = "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\ColorizationAfterglowBalance = "10"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\EnableWindowColorization = "1"	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\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\ColorizationColor = "3288365271"	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

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

VTPatcher.exe

description pid process

Token: SeDebugPrivilege 2092 VTPatcher.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

LogonUI.exe

pid process

2812 LogonUI.exe
2812 LogonUI.exe

description	pid	process
Token: SeDebugPrivilege	2092	VTPatcher.exe

pid	process
2812	LogonUI.exe
2812	LogonUI.exe

C:\Users\Admin\AppData\Local\Temp\VTPatcher.exe
"C:\Users\Admin\AppData\Local\Temp\VTPatcher.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2092

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x0 /state0:0xa3ad1855 /state1:0x41c64e6d
1⤵
- Modifies WinLogon to allow AutoLogon
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:2812

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

T1004

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/2092-2-0x00007FFFD26D0000-0x00007FFFD30BC000-memory.dmp

Filesize
9.9MB

Download
memory/2092-3-0x0000000000400000-0x0000000000401000-memory.dmp

Filesize
4KB

Download
memory/2092-5-0x0000000000840000-0x0000000000841000-memory.dmp

Filesize
4KB

Download
memory/2092-6-0x00000000026D0000-0x00000000026D2000-memory.dmp

Filesize
8KB

Download