dcrat | e10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab

Analysis

max time kernel
101s
max time network
141s
platform
windows10-2004_x64
resource
win10v2004-20260130-en
resource tags

arch:x64arch:x86image:win10v2004-20260130-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
11/05/2026, 00:55

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General

Target
xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
Size 1.7MB
Sample260511-a96grscs8q
SHA256 e10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab
MD5 0fa7cdd56a17f7b3751f4cea01cb65fb
SHA1 7de502f555eb504be45bd6594bf91a148fcddfba
SHA512 ca614f8087ebdddc328438c7b42440f9f92a69d9bb27a9f687fb635724631e36ae7d9904eee98d578067917ebe915094c5268ca28d000194aafa749a779ac0aa
SSDEEP 49152:ckQzAkIwMtuvMDVPG4JdXeR4aT6LQ+d3mY/4qxTsx3scq:c6suRD9JdOR4m+lmY/4rx8cq
TLSH
T1CF8523197181D333C2FB003085C58FB55A2566224F7566EFFBE89B662F202F4BB661C9
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

defense_evasion discovery execution dcrat infostealer persistence rat trojan

Malware Config

Signatures

Family: DcRat
DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.
rat infostealer dcrat

Modifies WinLogon for persistence 2 TTPs 3 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\Users\\Admin\\Documents\\OneNote Notebooks\\winlogon.exe\""	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\Users\\Admin\\Documents\\OneNote Notebooks\\winlogon.exe\", \"C:\\Users\\Default User\\dllhost.exe\""	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\Users\\Admin\\Documents\\OneNote Notebooks\\winlogon.exe\", \"C:\\Users\\Default User\\dllhost.exe\", \"C:\\Program Files (x86)\\MSBuild\\Microsoft\\winlogon.exe\""	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe

Process spawned unexpected child process 9 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

description	pid	pid_target	Process	procid_target
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	5796	4220	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2604	4220	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	5028	4220	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	972	4220	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1740	4220	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3540	4220	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	6032	4220	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	5560	4220	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4940	4220	schtasks.exe	85

UAC bypass 3 TTPs 6 IoCs

defense_evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	winlogon.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	winlogon.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	winlogon.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 11 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
3280	powershell.exe
6032	powershell.exe
3164	powershell.exe
3540	powershell.exe
4812	powershell.exe
4464	powershell.exe
4172	powershell.exe
1296	powershell.exe
968	powershell.exe
704	powershell.exe
6008	powershell.exe

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-643422742-1162610606-620613169-1000\Control Panel\International\Geo\Nation	winlogon.exe
Key value queried	\REGISTRY\USER\S-1-5-21-643422742-1162610606-620613169-1000\Control Panel\International\Geo\Nation	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe

Executes dropped EXE 3 IoCs

pid	Process
5316	winlogon.exe
2668	dllhost.exe
4636	winlogon.exe

Adds Run key to start application 2 TTPs 6 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-643422742-1162610606-620613169-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winlogon = "\"C:\\Users\\Admin\\Documents\\OneNote Notebooks\\winlogon.exe\""	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\winlogon = "\"C:\\Users\\Admin\\Documents\\OneNote Notebooks\\winlogon.exe\""	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-643422742-1162610606-620613169-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\dllhost = "\"C:\\Users\\Default User\\dllhost.exe\""	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\dllhost = "\"C:\\Users\\Default User\\dllhost.exe\""	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-643422742-1162610606-620613169-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winlogon = "\"C:\\Program Files (x86)\\MSBuild\\Microsoft\\winlogon.exe\""	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\winlogon = "\"C:\\Program Files (x86)\\MSBuild\\Microsoft\\winlogon.exe\""	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe

Checks whether UAC is enabled 1 TTPs 4 IoCs

defense_evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	winlogon.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	winlogon.exe

SmartAssembly .NET packer 5 IoCs

Detects SmartAssembly .NET packer.

resource	yara_rule
behavioral1/memory/4728-5232-0x0000000006070000-0x0000000006080000-memory.dmp	SmartAssembly
behavioral1/memory/4728-5236-0x00000000069D0000-0x00000000069DA000-memory.dmp	SmartAssembly
behavioral1/memory/4728-5242-0x0000000006AE0000-0x0000000006AEA000-memory.dmp	SmartAssembly
behavioral1/memory/4728-5241-0x0000000006AB0000-0x0000000006ABC000-memory.dmp	SmartAssembly
behavioral1/memory/4728-5244-0x00000000073D0000-0x00000000073DC000-memory.dmp	SmartAssembly

Drops file in Program Files directory 5 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\MSBuild\Microsoft\winlogon.exe	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
File created	C:\Program Files (x86)\MSBuild\Microsoft\cc11b995f2a76d	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
File opened for modification	C:\Program Files (x86)\MSBuild\Microsoft\RCXD35E.tmp	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
File opened for modification	C:\Program Files (x86)\MSBuild\Microsoft\RCXD35F.tmp	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
File opened for modification	C:\Program Files (x86)\MSBuild\Microsoft\winlogon.exe	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 17 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	winlogon.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	dllhost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	winlogon.exe

Modifies registry class 2 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
Key created	\REGISTRY\USER\S-1-5-21-643422742-1162610606-620613169-1000_Classes\Local Settings	winlogon.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 9 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2604	schtasks.exe
1740	schtasks.exe
5560	schtasks.exe
5796	schtasks.exe
5028	schtasks.exe
972	schtasks.exe
3540	schtasks.exe
6032	schtasks.exe
4940	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
3280	powershell.exe
3280	powershell.exe
3540	powershell.exe
3540	powershell.exe
968	powershell.exe
968	powershell.exe
4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
4172	powershell.exe
4172	powershell.exe
6008	powershell.exe
1296	powershell.exe
6008	powershell.exe
1296	powershell.exe
6032	powershell.exe
3164	powershell.exe
6032	powershell.exe
3164	powershell.exe
4464	powershell.exe
4464	powershell.exe
4812	powershell.exe
4812	powershell.exe
704	powershell.exe
704	powershell.exe
3280	powershell.exe
3280	powershell.exe
704	powershell.exe
1296	powershell.exe
4172	powershell.exe
6032	powershell.exe
4812	powershell.exe
6008	powershell.exe
3164	powershell.exe
968	powershell.exe

Suspicious use of AdjustPrivilegeToken 15 IoCs

description	pid	Process
Token: SeDebugPrivilege	4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
Token: SeDebugPrivilege	5316	winlogon.exe
Token: SeDebugPrivilege	2668	dllhost.exe
Token: SeDebugPrivilege	3280	powershell.exe
Token: SeDebugPrivilege	3540	powershell.exe
Token: SeDebugPrivilege	704	powershell.exe
Token: SeDebugPrivilege	968	powershell.exe
Token: SeDebugPrivilege	4172	powershell.exe
Token: SeDebugPrivilege	1296	powershell.exe
Token: SeDebugPrivilege	6008	powershell.exe
Token: SeDebugPrivilege	4636	winlogon.exe
Token: SeDebugPrivilege	3164	powershell.exe
Token: SeDebugPrivilege	6032	powershell.exe
Token: SeDebugPrivilege	4464	powershell.exe
Token: SeDebugPrivilege	4812	powershell.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 4728 wrote to memory of 968	4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe	104
PID 4728 wrote to memory of 3540	4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe	105
PID 4728 wrote to memory of 1296	4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe	106
PID 4728 wrote to memory of 4172	4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe	107
PID 4728 wrote to memory of 3164	4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe	108
PID 4728 wrote to memory of 6032	4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe	109
PID 4728 wrote to memory of 4464	4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe	110
PID 4728 wrote to memory of 3280	4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe	111
PID 4728 wrote to memory of 4812	4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe	112
PID 4728 wrote to memory of 6008	4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe	113
PID 4728 wrote to memory of 704	4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe	114
PID 4728 wrote to memory of 4636	4728	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe	126
PID 5316 wrote to memory of 6256	5316	winlogon.exe	127
PID 5316 wrote to memory of 6016	5316	winlogon.exe	128

System policy modification 1 TTPs 6 IoCs

defense_evasion

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	winlogon.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	winlogon.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	winlogon.exe

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe
"C:\Users\Admin\AppData\Local\Temp\xe10529e91e36451bf73975ec7d0559599f4c1f778f015ee6f90da6090a33ffab.exe"
1⤵
- Modifies WinLogon for persistence
- UAC bypass
- Checks computer location settings
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
PID:4728
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell" -Command Add-MpPreference -ExclusionPath 'C:/'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:968
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell" -Command Add-MpPreference -ExclusionPath 'C:/$Recycle.Bin/'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3540
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell" -Command Add-MpPreference -ExclusionPath 'C:/Documents and Settings/'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1296
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell" -Command Add-MpPreference -ExclusionPath 'C:/PerfLogs/'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4172
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell" -Command Add-MpPreference -ExclusionPath 'C:/Program Files/'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3164
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell" -Command Add-MpPreference -ExclusionPath 'C:/Program Files (x86)/'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:6032
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell" -Command Add-MpPreference -ExclusionPath 'C:/ProgramData/'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4464
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell" -Command Add-MpPreference -ExclusionPath 'C:/Recovery/'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3280
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell" -Command Add-MpPreference -ExclusionPath 'C:/System Volume Information/'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4812
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell" -Command Add-MpPreference -ExclusionPath 'C:/Users/'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:6008
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell" -Command Add-MpPreference -ExclusionPath 'C:/Windows/'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:704
- C:\Program Files (x86)\MSBuild\Microsoft\winlogon.exe
  "C:\Program Files (x86)\MSBuild\Microsoft\winlogon.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:4636

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 5 /tr "'C:\Users\Admin\Documents\OneNote Notebooks\winlogon.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:5796

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\Users\Admin\Documents\OneNote Notebooks\winlogon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2604

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 9 /tr "'C:\Users\Admin\Documents\OneNote Notebooks\winlogon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:5028

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 12 /tr "'C:\Users\Default User\dllhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:972

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Users\Default User\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1740

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 12 /tr "'C:\Users\Default User\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3540

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\MSBuild\Microsoft\winlogon.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:6032

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\Program Files (x86)\MSBuild\Microsoft\winlogon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:5560

C:\Users\Admin\Documents\OneNote Notebooks\winlogon.exe
"C:\Users\Admin\Documents\OneNote Notebooks\winlogon.exe"
1⤵
- UAC bypass
- Checks computer location settings
- Executes dropped EXE
- Checks whether UAC is enabled
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
PID:5316
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\a3c0f640-5ea9-4721-8546-f454bdafa4bb.vbs"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:6256
- - C:\Users\Admin\Documents\OneNote Notebooks\winlogon.exe
    "C:\Users\Admin\Documents\OneNote Notebooks\winlogon.exe"
    3⤵
    PID:2044
  - - C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\c587f6e8-682f-41eb-b656-f26455d90639.vbs"
      4⤵
      PID:6300
    - - C:\Users\Admin\Documents\OneNote Notebooks\winlogon.exe
        
        "C:\Users\Admin\Documents\OneNote Notebooks\winlogon.exe"
        5⤵
        
        PID:1096
  - - C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\30df67e7-3a94-4fb2-841c-94a1b15050af.vbs"
      4⤵
      PID:1180
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\c2a35d7b-23c4-4990-8277-6f7d37d5ab23.vbs"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:6016

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\MSBuild\Microsoft\winlogon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4940

C:\Users\Default User\dllhost.exe
"C:\Users\Default User\dllhost.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:2668

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

powershell.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log
Size 2KB
SHA256 6f8fd1b8d9788ad54eaeee329232187e24b7b43393a01aeba2d6e9675231fb69
MD5 3d086a433708053f9bf9523e1d87a4e8
SHA1 b3ab5d4f282a4c8fe8c3005b8a557ed5a0e37f28
SHA512 931ae42b4c68a4507ff2342332b08eb407050d47cf4176137ea022d0f6e513c689e998445a04c6d18d4877391705c586bfce0234632b898d41aaed0957996dfd
TLSH
T1A8417C303261A9D84D435B0215286ED5E3EF478AAFAC5F5CB569231DCE2A44BD7221F3
MD5 SHA1 SHA512 TLSH

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winlogon.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\winlogon.exe.log
Size 1KB
SHA256 aaac00dacd37c23d8f6d509d918fb51aed021ae042e0ada9c366f07dfeb5c536
MD5 ba603bf22cafea7ad3a7e4d067710be1
SHA1 c08a4f87f62773d797e0bc161ff1e901c0c24840
SHA512 3f1c98c837ab22a7e067af1d55b50fa5148773fbb0fc6d2e70233f24e8b07ecda866b80cbc4dda616f34786a54a069491bdf5047a074cf565b5194e673d82d7d
TLSH
T1BE218E303222B5D84D022F53085869C513FF4759BA64EE2CB999225EDD2A45BAB321E3
MD5 SHA1 SHA512 TLSH

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