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 2600 MsiExec.exe
13 2600 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

2600 MsiExec.exe
2600 MsiExec.exe

flow	pid	process
10	2600	MsiExec.exe
13	2600	MsiExec.exe

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

pid	process
2600	MsiExec.exe
2600	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\ÖåóÝåÚpæëÓÛÞàÓvÍ.App.Refresh.System = "C:\\ProgramData\\Exported Files\\ÖåóÝåÚpæëÓÛÞàÓvÍ.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)	\??\A:	msiexec.exe
File opened (read-only)	\??\L:	msiexec.exe
File opened (read-only)	\??\P:	msiexec.exe
File opened (read-only)	\??\F:	msiexec.exe
File opened (read-only)	\??\P:	msiexec.exe
File opened (read-only)	\??\B:	msiexec.exe
File opened (read-only)	\??\L:	msiexec.exe
File opened (read-only)	\??\U:	msiexec.exe
File opened (read-only)	\??\Y:	msiexec.exe
File opened (read-only)	\??\Z:	msiexec.exe
File opened (read-only)	\??\G:	msiexec.exe
File opened (read-only)	\??\I:	msiexec.exe
File opened (read-only)	\??\M:	msiexec.exe
File opened (read-only)	\??\T:	msiexec.exe
File opened (read-only)	\??\X:	msiexec.exe
File opened (read-only)	\??\N:	msiexec.exe
File opened (read-only)	\??\Q:	msiexec.exe
File opened (read-only)	\??\S:	msiexec.exe
File opened (read-only)	\??\T:	msiexec.exe
File opened (read-only)	\??\X:	msiexec.exe
File opened (read-only)	\??\H:	msiexec.exe
File opened (read-only)	\??\J:	msiexec.exe
File opened (read-only)	\??\Q:	msiexec.exe
File opened (read-only)	\??\U:	msiexec.exe
File opened (read-only)	\??\V:	msiexec.exe
File opened (read-only)	\??\W:	msiexec.exe
File opened (read-only)	\??\A:	msiexec.exe
File opened (read-only)	\??\G:	msiexec.exe
File opened (read-only)	\??\K:	msiexec.exe
File opened (read-only)	\??\E:	msiexec.exe
File opened (read-only)	\??\F:	msiexec.exe
File opened (read-only)	\??\K:	msiexec.exe
File opened (read-only)	\??\S:	msiexec.exe
File opened (read-only)	\??\Y:	msiexec.exe
File opened (read-only)	\??\B:	msiexec.exe
File opened (read-only)	\??\J:	msiexec.exe
File opened (read-only)	\??\M:	msiexec.exe
File opened (read-only)	\??\R:	msiexec.exe
File opened (read-only)	\??\N:	msiexec.exe
File opened (read-only)	\??\Z:	msiexec.exe
File opened (read-only)	\??\H:	msiexec.exe
File opened (read-only)	\??\O:	msiexec.exe
File opened (read-only)	\??\V:	msiexec.exe
File opened (read-only)	\??\W:	msiexec.exe
File opened (read-only)	\??\O:	msiexec.exe
File opened (read-only)	\??\R:	msiexec.exe
File opened (read-only)	\??\E:	msiexec.exe
File opened (read-only)	\??\I:	msiexec.exe

Drops file in Windows directory 9 IoCs

Processes:

msiexec.exe

description	ioc	process
File opened for modification	C:\Windows\Installer\MSI44A0.tmp	msiexec.exe
File created	C:\Windows\Installer\inprogressinstallinfo.ipi	msiexec.exe
File opened for modification	C:\Windows\Installer\MSI4E37.tmp	msiexec.exe
File created	C:\Windows\Installer\f7443c5.msi	msiexec.exe
File opened for modification	C:\Windows\Installer\f7443c5.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\MSI4BE4.tmp	msiexec.exe
File opened for modification	C:\Windows\Installer\	msiexec.exe
File created	C:\Windows\Installer\SourceHash{187B873D-9E06-4065-A278-668510B1CE94}	msiexec.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
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History	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\AccentColorMenu = "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\CurrentVersion\Explorer\Accent\StartColorMenu = "4288567808"	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\ColorizationAfterglow = "3288365271"	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\AccentColor = "4292311040"	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\ColorizationGlassAttribute = "1"	LogonUI.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

msiexec.exewlrmdr.exe

pid process

2456 msiexec.exe
2456 msiexec.exe
2596 wlrmdr.exe
2596 wlrmdr.exe

pid	process
2456	msiexec.exe
2456	msiexec.exe
2596	wlrmdr.exe
2596	wlrmdr.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

Processes:

msiexec.exemsiexec.exeshutdown.exe

description	pid	process
Token: SeShutdownPrivilege	1160	msiexec.exe
Token: SeIncreaseQuotaPrivilege	1160	msiexec.exe
Token: SeSecurityPrivilege	2456	msiexec.exe
Token: SeCreateTokenPrivilege	1160	msiexec.exe
Token: SeAssignPrimaryTokenPrivilege	1160	msiexec.exe
Token: SeLockMemoryPrivilege	1160	msiexec.exe
Token: SeIncreaseQuotaPrivilege	1160	msiexec.exe
Token: SeMachineAccountPrivilege	1160	msiexec.exe
Token: SeTcbPrivilege	1160	msiexec.exe
Token: SeSecurityPrivilege	1160	msiexec.exe
Token: SeTakeOwnershipPrivilege	1160	msiexec.exe
Token: SeLoadDriverPrivilege	1160	msiexec.exe
Token: SeSystemProfilePrivilege	1160	msiexec.exe
Token: SeSystemtimePrivilege	1160	msiexec.exe
Token: SeProfSingleProcessPrivilege	1160	msiexec.exe
Token: SeIncBasePriorityPrivilege	1160	msiexec.exe
Token: SeCreatePagefilePrivilege	1160	msiexec.exe
Token: SeCreatePermanentPrivilege	1160	msiexec.exe
Token: SeBackupPrivilege	1160	msiexec.exe
Token: SeRestorePrivilege	1160	msiexec.exe
Token: SeShutdownPrivilege	1160	msiexec.exe
Token: SeDebugPrivilege	1160	msiexec.exe
Token: SeAuditPrivilege	1160	msiexec.exe
Token: SeSystemEnvironmentPrivilege	1160	msiexec.exe
Token: SeChangeNotifyPrivilege	1160	msiexec.exe
Token: SeRemoteShutdownPrivilege	1160	msiexec.exe
Token: SeUndockPrivilege	1160	msiexec.exe
Token: SeSyncAgentPrivilege	1160	msiexec.exe
Token: SeEnableDelegationPrivilege	1160	msiexec.exe
Token: SeManageVolumePrivilege	1160	msiexec.exe
Token: SeImpersonatePrivilege	1160	msiexec.exe
Token: SeCreateGlobalPrivilege	1160	msiexec.exe
Token: SeRestorePrivilege	2456	msiexec.exe
Token: SeTakeOwnershipPrivilege	2456	msiexec.exe
Token: SeRestorePrivilege	2456	msiexec.exe
Token: SeTakeOwnershipPrivilege	2456	msiexec.exe
Token: SeRestorePrivilege	2456	msiexec.exe
Token: SeTakeOwnershipPrivilege	2456	msiexec.exe
Token: SeRestorePrivilege	2456	msiexec.exe
Token: SeTakeOwnershipPrivilege	2456	msiexec.exe
Token: SeRestorePrivilege	2456	msiexec.exe
Token: SeTakeOwnershipPrivilege	2456	msiexec.exe
Token: SeRestorePrivilege	2456	msiexec.exe
Token: SeTakeOwnershipPrivilege	2456	msiexec.exe
Token: SeRestorePrivilege	2456	msiexec.exe
Token: SeTakeOwnershipPrivilege	2456	msiexec.exe
Token: SeShutdownPrivilege	3872	shutdown.exe
Token: SeRemoteShutdownPrivilege	3872	shutdown.exe

Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

msiexec.exe

pid process

1160 msiexec.exe
1160 msiexec.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

wlrmdr.exeLogonUI.exe

pid process

2596 wlrmdr.exe
3988 LogonUI.exe

pid	process
1160	msiexec.exe
1160	msiexec.exe

pid	process
2596	wlrmdr.exe
3988	LogonUI.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

msiexec.exeMsiExec.exe

description	pid	process	target process
PID 2456 wrote to memory of 2600	2456	msiexec.exe	MsiExec.exe
PID 2456 wrote to memory of 2600	2456	msiexec.exe	MsiExec.exe
PID 2456 wrote to memory of 2600	2456	msiexec.exe	MsiExec.exe
PID 2600 wrote to memory of 516	2600	MsiExec.exe	reg.exe
PID 2600 wrote to memory of 516	2600	MsiExec.exe	reg.exe
PID 2600 wrote to memory of 516	2600	MsiExec.exe	reg.exe
PID 2600 wrote to memory of 3872	2600	MsiExec.exe	shutdown.exe
PID 2600 wrote to memory of 3872	2600	MsiExec.exe	shutdown.exe
PID 2600 wrote to memory of 3872	2600	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:1160

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:2456

C:\Windows\syswow64\MsiExec.exe
C:\Windows\syswow64\MsiExec.exe -Embedding 0B257856F760571B6F98CF3D598577D1
2⤵
- Blocklisted process makes network request
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2600

C:\Windows\SysWOW64\reg.exe
"C:\Windows\System32\reg.exe" ADD "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /V "ÖåóÝåÚpæëÓÛÞàÓvÍ.App.Refresh.System" /t REG_SZ /F /D "C:\ProgramData\Exported Files\ÖåóÝåÚpæëÓÛÞàÓvÍ.App.Refresh.System.exe"
3⤵
- Adds Run key to start application
PID:516

C:\WINDOWS\SysWOW64\shutdown.exe
"C:\WINDOWS\system32\shutdown.exe" -r -t 1 -f
3⤵
- Suspicious use of AdjustPrivilegeToken
PID:3872

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:2596

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:3988

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

1

T1004

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Query Registry

1

T1012

Peripheral Device Discovery

1

T1120

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\MSI43f70.LOG
MD5
bb536a18eb2148c14247d9fdd5469e38

SHA1
06d138afe0faedc2f980c838ce6eea19d3c07899

SHA256
48e66b5a1cb1e80ab1bf8d05c0f825512b0486884853fcfd81a30af0cb493771

SHA512
f5f76d585ef42d1d81de803613d35e8b9e3493cf64a42370d945e8955221957f0c9569da1397b37fa61b4eaf844d06311a7cb937a07ab9424c973c61ef3d09e1

Download Submit
C:\Windows\Installer\MSI44A0.tmp
MD5
5c5bef05b6f3806106f8f3ce13401cc1

SHA1
6005fbe17f6e917ac45317552409d7a60976db14

SHA256
f2f3ae8ca06f5cf320ca1d234a623bf55cf2b84c1d6dea3d85d5392e29aaf437

SHA512
97933227b6002127385ace025f85a26358e47ee79c883f03180d474c15dbaf28a88492c8e53aefc0d305872edd27db0b4468da13e6f0337988f58d2ee35fd797

Download Submit
C:\Windows\Installer\MSI4BE4.tmp
MD5
5c5bef05b6f3806106f8f3ce13401cc1

SHA1
6005fbe17f6e917ac45317552409d7a60976db14

SHA256
f2f3ae8ca06f5cf320ca1d234a623bf55cf2b84c1d6dea3d85d5392e29aaf437

SHA512
97933227b6002127385ace025f85a26358e47ee79c883f03180d474c15dbaf28a88492c8e53aefc0d305872edd27db0b4468da13e6f0337988f58d2ee35fd797

Download Submit
\Windows\Installer\MSI44A0.tmp
MD5
5c5bef05b6f3806106f8f3ce13401cc1

SHA1
6005fbe17f6e917ac45317552409d7a60976db14

SHA256
f2f3ae8ca06f5cf320ca1d234a623bf55cf2b84c1d6dea3d85d5392e29aaf437

SHA512
97933227b6002127385ace025f85a26358e47ee79c883f03180d474c15dbaf28a88492c8e53aefc0d305872edd27db0b4468da13e6f0337988f58d2ee35fd797

Download Submit
\Windows\Installer\MSI4BE4.tmp
MD5
5c5bef05b6f3806106f8f3ce13401cc1

SHA1
6005fbe17f6e917ac45317552409d7a60976db14

SHA256
f2f3ae8ca06f5cf320ca1d234a623bf55cf2b84c1d6dea3d85d5392e29aaf437

SHA512
97933227b6002127385ace025f85a26358e47ee79c883f03180d474c15dbaf28a88492c8e53aefc0d305872edd27db0b4468da13e6f0337988f58d2ee35fd797

Download Submit
memory/516-11-0x0000000000000000-mapping.dmp

Download
memory/2600-6-0x0000000000000000-mapping.dmp

Download
memory/3872-12-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

Errors

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads