9d6163d57c9c99026b1203a475f0dac06b6a75a82a83d7c0c19442cb14ba35e5

Reason

Machine shutdown

General

Target

chthonic_2.23.18.10.vir.exe
Size

470KB
MD5

54edda43ee2e20c39fea5e2dabb6c921
SHA1

a4332ec867080ba63e3523cae84b093c0fcef902
SHA256

9d6163d57c9c99026b1203a475f0dac06b6a75a82a83d7c0c19442cb14ba35e5
SHA512

d1e8756b1980b03c98c0a0aa322277f2a38687b9e9d1ecb758d23932958248c29f9aaa6fb3a3b25581adf2852c9e61d3d76cb56f213a0f0ef5eebd22cd230bf3

Score

8^/10

persistence ransomware bootkit

Malware Config

Signatures

Suspicious use of AdjustPrivilegeToken 101 IoCs

Processes:

chthonic_2.23.18.10.vir.exe

description	pid	process
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeBackupPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeRestorePrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe
Token: SeShutdownPrivilege	3944	chthonic_2.23.18.10.vir.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

LogonUI.exe

pid process

3992 LogonUI.exe

pid	process
3992	LogonUI.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

chthonic_2.23.18.10.vir.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-1231583446-2617009595-2137880041-1000\software\microsoft\windows\currentversion\Run	chthonic_2.23.18.10.vir.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1231583446-2617009595-2137880041-1000\Software\Microsoft\Windows\CurrentVersion\Run\WindowsSidebarS = "C:\\Users\\Admin\\AppData\\Roaming\\WindowsSidebarS\\WindowsSidebarS.exe"	chthonic_2.23.18.10.vir.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

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\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
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColorBalance = "89"	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\StartColorMenu = "4288567808"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationBlurBalance = "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\ColorizationAfterglowBalance = "10"	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 (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentPalette = a6d8ff0076b9ed00429ce3000078d700005a9e000042750000264200f7630c00	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\CurrentVersion\Themes\History\AutoColor = "0"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationGlassAttribute = "1"	LogonUI.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

chthonic_2.23.18.10.vir.exe

pid process

3944 chthonic_2.23.18.10.vir.exe

Loads dropped DLL 6 IoCs

Processes:

chthonic_2.23.18.10.vir.exe

pid	process
3944	chthonic_2.23.18.10.vir.exe
3944	chthonic_2.23.18.10.vir.exe
3944	chthonic_2.23.18.10.vir.exe
3944	chthonic_2.23.18.10.vir.exe
3944	chthonic_2.23.18.10.vir.exe
3944	chthonic_2.23.18.10.vir.exe

C:\Users\Admin\AppData\Local\Temp\chthonic_2.23.18.10.vir.exe
"C:\Users\Admin\AppData\Local\Temp\chthonic_2.23.18.10.vir.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Adds Run key to start application
- Suspicious behavior: GetForegroundWindowSpam
- Loads dropped DLL
PID:3944

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x0 /state0:0xa3ac6055 /state1:0x41c64e6d
1⤵
- Suspicious use of SetWindowsHookEx
- Modifies WinLogon to allow AutoLogon
- Modifies data under HKEY_USERS
PID:3992

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Winlogon Helper DLL

1

T1004

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

\Users\Admin\AppData\Local\Temp\31416D35.tmp

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\Users\Admin\AppData\Local\Temp\396A6536.tmp

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\Users\Admin\AppData\Local\Temp\41327968.tmp

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\Users\Admin\AppData\Local\Temp\4A4E347A.tmp

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\Users\Admin\AppData\Local\Temp\52353572.tmp

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\Users\Admin\AppData\Local\Temp\584F3849.tmp

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Analysis

Sharing

Errors

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads