53cacd3f0415f660597b5636056c0303fb9559ce5a8d9197930ef94c273be306

Reason

Machine shutdown

General

Target

4_2342234575679328584.msi
Size

266KB
MD5

7c07a45d87cc4651a1fd84ec84a26305
SHA1

a2c9403bd3c9482cf666bfef2261e0625d1b5132
SHA256

53cacd3f0415f660597b5636056c0303fb9559ce5a8d9197930ef94c273be306
SHA512

e60e20bdd286bde8828679a8176695119c7bb4d9e679d2ba746f272e1cf868e1a35eb2afb4e0eef15e33cf3927293110e4544d111f5c5c3dbdecea4101414684

Score

8^/10

bootkit persistence ransomware

Malware Config

Signatures

Blocklisted process makes network request 2 IoCs

Processes:

MsiExec.exe

flow pid process

10 1000 MsiExec.exe
14 1000 MsiExec.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
Loads dropped DLL 2 IoCs

Processes:

MsiExec.exe

pid process

1000 MsiExec.exe
1000 MsiExec.exe

flow	pid	process
10	1000	MsiExec.exe
14	1000	MsiExec.exe

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

pid	process
1000	MsiExec.exe
1000	MsiExec.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

reg.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run\opÒïçxâv×dÞbÍæcä.App.Refresh.System = "C:\\ProgramData\\Exported Files\\opÒïçxâv×dÞbÍæcä.App.Refresh.System.exe"	reg.exe

Enumerates connected drives 3 TTPs 48 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

msiexec.exemsiexec.exe

description	ioc	process
File opened (read-only)	\??\K:	msiexec.exe
File opened (read-only)	\??\Y:	msiexec.exe
File opened (read-only)	\??\Z:	msiexec.exe
File opened (read-only)	\??\O:	msiexec.exe
File opened (read-only)	\??\R:	msiexec.exe
File opened (read-only)	\??\J:	msiexec.exe
File opened (read-only)	\??\F:	msiexec.exe
File opened (read-only)	\??\G:	msiexec.exe
File opened (read-only)	\??\N:	msiexec.exe
File opened (read-only)	\??\U:	msiexec.exe
File opened (read-only)	\??\W:	msiexec.exe
File opened (read-only)	\??\J:	msiexec.exe
File opened (read-only)	\??\Y:	msiexec.exe
File opened (read-only)	\??\Z:	msiexec.exe
File opened (read-only)	\??\N:	msiexec.exe
File opened (read-only)	\??\A:	msiexec.exe
File opened (read-only)	\??\I:	msiexec.exe
File opened (read-only)	\??\L:	msiexec.exe
File opened (read-only)	\??\O:	msiexec.exe
File opened (read-only)	\??\B:	msiexec.exe
File opened (read-only)	\??\I:	msiexec.exe
File opened (read-only)	\??\L:	msiexec.exe
File opened (read-only)	\??\S:	msiexec.exe
File opened (read-only)	\??\X:	msiexec.exe
File opened (read-only)	\??\M:	msiexec.exe
File opened (read-only)	\??\Q:	msiexec.exe
File opened (read-only)	\??\T:	msiexec.exe
File opened (read-only)	\??\E:	msiexec.exe
File opened (read-only)	\??\H:	msiexec.exe
File opened (read-only)	\??\K:	msiexec.exe
File opened (read-only)	\??\V:	msiexec.exe
File opened (read-only)	\??\A:	msiexec.exe
File opened (read-only)	\??\F:	msiexec.exe
File opened (read-only)	\??\M:	msiexec.exe
File opened (read-only)	\??\E:	msiexec.exe
File opened (read-only)	\??\H:	msiexec.exe
File opened (read-only)	\??\P:	msiexec.exe
File opened (read-only)	\??\U:	msiexec.exe
File opened (read-only)	\??\W:	msiexec.exe
File opened (read-only)	\??\R:	msiexec.exe
File opened (read-only)	\??\V:	msiexec.exe
File opened (read-only)	\??\B:	msiexec.exe
File opened (read-only)	\??\Q:	msiexec.exe
File opened (read-only)	\??\P:	msiexec.exe
File opened (read-only)	\??\T:	msiexec.exe
File opened (read-only)	\??\G:	msiexec.exe
File opened (read-only)	\??\S:	msiexec.exe
File opened (read-only)	\??\X:	msiexec.exe

Drops file in Windows directory 9 IoCs

Processes:

msiexec.exe

description	ioc	process
File created	C:\Windows\Installer\f749792.msi	msiexec.exe
File opened for modification	C:\Windows\Installer\MSI985D.tmp	msiexec.exe
File opened for modification	C:\Windows\Installer\MSI9C46.tmp	msiexec.exe
File created	C:\Windows\Installer\SourceHash{187B873D-9E06-4065-A278-668510B1CE94}	msiexec.exe
File opened for modification	C:\Windows\Installer\f749792.msi	msiexec.exe
File opened for modification	C:\Windows\Microsoft.NET\Framework64\v4.0.30319\ngen.log	msiexec.exe
File opened for modification	C:\Windows\Installer\	msiexec.exe
File created	C:\Windows\Installer\inprogressinstallinfo.ipi	msiexec.exe
File opened for modification	C:\Windows\Installer\MSI9E1C.tmp	msiexec.exe

Modifies data under HKEY_USERS 15 IoCs

Processes:

LogonUI.exe

description	ioc	process
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\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\ColorizationGlassAttribute = "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
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationBlurBalance = "1"	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\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
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\AccentColorMenu = "4292311040"	LogonUI.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

msiexec.exewlrmdr.exe

pid process

4004 msiexec.exe
4004 msiexec.exe
4036 wlrmdr.exe
4036 wlrmdr.exe

pid	process
4004	msiexec.exe
4004	msiexec.exe
4036	wlrmdr.exe
4036	wlrmdr.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

Processes:

msiexec.exemsiexec.exeshutdown.exe

description	pid	process
Token: SeShutdownPrivilege	1048	msiexec.exe
Token: SeIncreaseQuotaPrivilege	1048	msiexec.exe
Token: SeSecurityPrivilege	4004	msiexec.exe
Token: SeCreateTokenPrivilege	1048	msiexec.exe
Token: SeAssignPrimaryTokenPrivilege	1048	msiexec.exe
Token: SeLockMemoryPrivilege	1048	msiexec.exe
Token: SeIncreaseQuotaPrivilege	1048	msiexec.exe
Token: SeMachineAccountPrivilege	1048	msiexec.exe
Token: SeTcbPrivilege	1048	msiexec.exe
Token: SeSecurityPrivilege	1048	msiexec.exe
Token: SeTakeOwnershipPrivilege	1048	msiexec.exe
Token: SeLoadDriverPrivilege	1048	msiexec.exe
Token: SeSystemProfilePrivilege	1048	msiexec.exe
Token: SeSystemtimePrivilege	1048	msiexec.exe
Token: SeProfSingleProcessPrivilege	1048	msiexec.exe
Token: SeIncBasePriorityPrivilege	1048	msiexec.exe
Token: SeCreatePagefilePrivilege	1048	msiexec.exe
Token: SeCreatePermanentPrivilege	1048	msiexec.exe
Token: SeBackupPrivilege	1048	msiexec.exe
Token: SeRestorePrivilege	1048	msiexec.exe
Token: SeShutdownPrivilege	1048	msiexec.exe
Token: SeDebugPrivilege	1048	msiexec.exe
Token: SeAuditPrivilege	1048	msiexec.exe
Token: SeSystemEnvironmentPrivilege	1048	msiexec.exe
Token: SeChangeNotifyPrivilege	1048	msiexec.exe
Token: SeRemoteShutdownPrivilege	1048	msiexec.exe
Token: SeUndockPrivilege	1048	msiexec.exe
Token: SeSyncAgentPrivilege	1048	msiexec.exe
Token: SeEnableDelegationPrivilege	1048	msiexec.exe
Token: SeManageVolumePrivilege	1048	msiexec.exe
Token: SeImpersonatePrivilege	1048	msiexec.exe
Token: SeCreateGlobalPrivilege	1048	msiexec.exe
Token: SeRestorePrivilege	4004	msiexec.exe
Token: SeTakeOwnershipPrivilege	4004	msiexec.exe
Token: SeRestorePrivilege	4004	msiexec.exe
Token: SeTakeOwnershipPrivilege	4004	msiexec.exe
Token: SeRestorePrivilege	4004	msiexec.exe
Token: SeTakeOwnershipPrivilege	4004	msiexec.exe
Token: SeRestorePrivilege	4004	msiexec.exe
Token: SeTakeOwnershipPrivilege	4004	msiexec.exe
Token: SeRestorePrivilege	4004	msiexec.exe
Token: SeTakeOwnershipPrivilege	4004	msiexec.exe
Token: SeShutdownPrivilege	2240	shutdown.exe
Token: SeRemoteShutdownPrivilege	2240	shutdown.exe
Token: SeRestorePrivilege	4004	msiexec.exe
Token: SeTakeOwnershipPrivilege	4004	msiexec.exe
Token: SeRestorePrivilege	4004	msiexec.exe
Token: SeTakeOwnershipPrivilege	4004	msiexec.exe

Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

msiexec.exe

pid process

1048 msiexec.exe
1048 msiexec.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

wlrmdr.exeLogonUI.exe

pid process

4036 wlrmdr.exe
2916 LogonUI.exe

pid	process
1048	msiexec.exe
1048	msiexec.exe

pid	process
4036	wlrmdr.exe
2916	LogonUI.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

msiexec.exeMsiExec.exe

description	pid	process	target process
PID 4004 wrote to memory of 1000	4004	msiexec.exe	MsiExec.exe
PID 4004 wrote to memory of 1000	4004	msiexec.exe	MsiExec.exe
PID 4004 wrote to memory of 1000	4004	msiexec.exe	MsiExec.exe
PID 1000 wrote to memory of 2208	1000	MsiExec.exe	reg.exe
PID 1000 wrote to memory of 2208	1000	MsiExec.exe	reg.exe
PID 1000 wrote to memory of 2208	1000	MsiExec.exe	reg.exe
PID 1000 wrote to memory of 2240	1000	MsiExec.exe	shutdown.exe
PID 1000 wrote to memory of 2240	1000	MsiExec.exe	shutdown.exe
PID 1000 wrote to memory of 2240	1000	MsiExec.exe	shutdown.exe

C:\Windows\system32\msiexec.exe
msiexec.exe /I C:\Users\Admin\AppData\Local\Temp\4_2342234575679328584.msi
1⤵
- Enumerates connected drives
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
PID:1048

C:\Windows\system32\msiexec.exe
C:\Windows\system32\msiexec.exe /V
1⤵
- Enumerates connected drives
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4004
- C:\Windows\syswow64\MsiExec.exe
  C:\Windows\syswow64\MsiExec.exe -Embedding 9B6FEEBE00BD27425EE64848CACE31E6
  2⤵
  - Blocklisted process makes network request
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1000
- - C:\Windows\SysWOW64\reg.exe
    "C:\Windows\System32\reg.exe" ADD "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /V "opÒïçxâv×dÞbÍæcä.App.Refresh.System" /t REG_SZ /F /D "C:\ProgramData\Exported Files\opÒïçxâv×dÞbÍæcä.App.Refresh.System.exe"
    3⤵
    - Adds Run key to start application
    PID:2208
- - C:\WINDOWS\SysWOW64\shutdown.exe
    "C:\WINDOWS\system32\shutdown.exe" -r -t 1 -f
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:2240

C:\Windows\system32\wlrmdr.exe
-s -1 -f 2 -t You're about to be signed out -m Windows will shut down in less than a minute. -a 3
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
PID:4036

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x0 /state0:0xa3ad5055 /state1:0x41c64e6d
1⤵
- Modifies WinLogon to allow AutoLogon
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:2916

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

Winlogon Helper DLL

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\MSI49187.LOG

MD5
95d330507f3cacb11f08180c442beac8

SHA1
d773cd0f4681d4d99dbc0424fd88164c6b4cc11a

SHA256
7bcab511606440647b62888cc7b435ecb09bd6e87d87dbe3fcaefcd64f842306

SHA512
5c9fa261e20e16a9ba61b695a5c7fc53118afd35ce2aad7442fe257dc3b815671f7ae642c7ae026d88f6571268cc226a029dccef666fe9b4c5f5e5ad8d886772

Download Submit
C:\Windows\Installer\MSI985D.tmp

MD5
5c5bef05b6f3806106f8f3ce13401cc1

SHA1
6005fbe17f6e917ac45317552409d7a60976db14

SHA256
f2f3ae8ca06f5cf320ca1d234a623bf55cf2b84c1d6dea3d85d5392e29aaf437

SHA512
97933227b6002127385ace025f85a26358e47ee79c883f03180d474c15dbaf28a88492c8e53aefc0d305872edd27db0b4468da13e6f0337988f58d2ee35fd797

Download Submit
C:\Windows\Installer\MSI9C46.tmp

MD5
5c5bef05b6f3806106f8f3ce13401cc1

SHA1
6005fbe17f6e917ac45317552409d7a60976db14

SHA256
f2f3ae8ca06f5cf320ca1d234a623bf55cf2b84c1d6dea3d85d5392e29aaf437

SHA512
97933227b6002127385ace025f85a26358e47ee79c883f03180d474c15dbaf28a88492c8e53aefc0d305872edd27db0b4468da13e6f0337988f58d2ee35fd797

Download Submit
\Windows\Installer\MSI985D.tmp

MD5
5c5bef05b6f3806106f8f3ce13401cc1

SHA1
6005fbe17f6e917ac45317552409d7a60976db14

SHA256
f2f3ae8ca06f5cf320ca1d234a623bf55cf2b84c1d6dea3d85d5392e29aaf437

SHA512
97933227b6002127385ace025f85a26358e47ee79c883f03180d474c15dbaf28a88492c8e53aefc0d305872edd27db0b4468da13e6f0337988f58d2ee35fd797

Download Submit
\Windows\Installer\MSI9C46.tmp

MD5
5c5bef05b6f3806106f8f3ce13401cc1

SHA1
6005fbe17f6e917ac45317552409d7a60976db14

SHA256
f2f3ae8ca06f5cf320ca1d234a623bf55cf2b84c1d6dea3d85d5392e29aaf437

SHA512
97933227b6002127385ace025f85a26358e47ee79c883f03180d474c15dbaf28a88492c8e53aefc0d305872edd27db0b4468da13e6f0337988f58d2ee35fd797

Download Submit
memory/1000-6-0x0000000000000000-mapping.dmp

Download
memory/2208-11-0x0000000000000000-mapping.dmp

Download
memory/2240-12-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

Errors

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads