d91912b4b945e88e881e54573390e6723cfc41916b6546453b59e60f9beee337

Analysis

max time kernel
110s
max time network
127s
platform
windows10_x64
resource
win10v20201028
submitted
20-11-2020 14:34

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Reason

Machine shutdown

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General

Target

WSHSetup[1].exe
Size

898KB
MD5

cb2b4cd74c7b57a12bd822a168e4e608
SHA1

f2182062719f0537071545b77ca75f39c2922bf5
SHA256

5987a6e42c3412086b7c9067dc25f1aaa659b2b123581899e9df92cb7907a3ed
SHA512

7a38be8c1270b1224be4975ad442a964b2523c849f748e5356156cdce39e494c64ca80b0d99c1d989d77f072902de8972e0b113894c9791fb0cabf856dbba348

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

60 1156 WerFault.exe WSHSetup[1].exe

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

pid	pid_target	process	target process
60	1156	WerFault.exe	WSHSetup[1].exe

Modifies data under HKEY_USERS 15 IoCs

Processes:

LogonUI.exe

description	ioc	process
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\ColorizationAfterglow = "3288365271"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationGlassAttribute = "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\DWM\ColorizationColorBalance = "89"	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\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\AccentColor = "4292311040"	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\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\CurrentVersion\Themes\History\AutoColor = "0"	LogonUI.exe

NTFS ADS 1 IoCs

Processes:

WSHSetup[1].exe

description ioc process

File opened for modification C:\Users\Admin\AppData\Local\Temp\򰃏C:\Windows\SysWOW64 WSHSetup[1].exe

description	ioc	process
File opened for modification	C:\Users\Admin\AppData\Local\Temp\򰃏C:\Windows\SysWOW64	WSHSetup[1].exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

Processes:

WerFault.exe

pid	process
60	WerFault.exe
60	WerFault.exe
60	WerFault.exe
60	WerFault.exe
60	WerFault.exe
60	WerFault.exe
60	WerFault.exe
60	WerFault.exe
60	WerFault.exe
60	WerFault.exe
60	WerFault.exe
60	WerFault.exe
60	WerFault.exe
60	WerFault.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

WerFault.exe

description pid process

Token: SeRestorePrivilege 60 WerFault.exe
Token: SeBackupPrivilege 60 WerFault.exe
Token: SeDebugPrivilege 60 WerFault.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

LogonUI.exe

pid process

3472 LogonUI.exe
3472 LogonUI.exe

description	pid	process
Token: SeRestorePrivilege	60	WerFault.exe
Token: SeBackupPrivilege	60	WerFault.exe
Token: SeDebugPrivilege	60	WerFault.exe

pid	process
3472	LogonUI.exe
3472	LogonUI.exe

C:\Users\Admin\AppData\Local\Temp\WSHSetup[1].exe
"C:\Users\Admin\AppData\Local\Temp\WSHSetup[1].exe"
1⤵
- NTFS ADS
PID:1156

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1156 -s 1524
2⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:60

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:3472

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/60-0-0x0000000004300000-0x0000000004301000-memory.dmp

Filesize
4KB

Download
memory/60-1-0x0000000004300000-0x0000000004301000-memory.dmp

Filesize
4KB

Download
memory/60-3-0x0000000004B30000-0x0000000004B31000-memory.dmp

Filesize
4KB

Download