596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2

Processes:

Winlogon.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit	Winlogon.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit\Iceberg = "\"C:\\Users\\Admin\\AppData\\Roaming\\1ceb3rg.exe\""	Winlogon.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell	Winlogon.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell\Iceberg = "\"C:\\Users\\Admin\\AppData\\Roaming\\1ceb3rg.exe\""	Winlogon.exe

Modifies security service 2 TTPs 1 IoCs
evasion

Modify Registry
T1112

Modify Existing Service
T1031

Processes:

Winlogon.exe

description ioc process

Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\wscsvc\Start = "4" Winlogon.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\wscsvc\Start = "4"	Winlogon.exe

UAC bypass 3 TTPs 2 IoCs

Bypass User Account Control

T1088

Disabling Security Tools

Modify Registry

Processes:

596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exeWinlogon.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	Winlogon.exe

Windows security bypass 2 TTPs 2 IoCs

Disabling Security Tools

Modify Registry

Processes:

596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exeWinlogon.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UACDisableNotify = "0"	596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UACDisableNotify = "0"	Winlogon.exe

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

Processes:

Winlogon.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\explorer\run	Winlogon.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\Iceberg = "\"C:\\Users\\Admin\\AppData\\Roaming\\1ceb3rg.exe\""	Winlogon.exe

Disables RegEdit via registry modification 1 IoCs

evasion

Processes:

reg.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Windows\CurrentVersion\Policies\System\disableregistrytools = "1"	reg.exe

Disables Task Manager via registry modification
evasion
Drops file in Drivers directory 1 IoCs

Processes:

Winlogon.exe

description ioc process

File opened for modification C:\Windows\system32\drivers\etc\hosts Winlogon.exe
Executes dropped EXE 3 IoCs

Processes:

Winlogon.exe24119.exemsiinst.exe

pid process

964 Winlogon.exe
1164 24119.exe
1616 msiinst.exe
Stops running service(s) 3 TTPs
evasion

Modify Existing Service
T1031

Impair Defenses
T1562

Service Stop
T1489

description	ioc	process
File opened for modification	C:\Windows\system32\drivers\etc\hosts	Winlogon.exe

pid	process
964	Winlogon.exe
1164	24119.exe
1616	msiinst.exe

UPX packed file 8 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral1/memory/1504-57-0x0000000000400000-0x0000000000451000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\Winlogon.exe	upx
C:\Users\Admin\AppData\Local\Temp\Winlogon.exe	upx
\Users\Admin\AppData\Local\Temp\Winlogon.exe	upx
C:\Users\Admin\AppData\Local\Temp\Winlogon.exe	upx
behavioral1/memory/964-71-0x0000000000400000-0x0000000000451000-memory.dmp	upx
behavioral1/memory/1504-80-0x0000000000400000-0x0000000000451000-memory.dmp	upx
behavioral1/memory/964-89-0x0000000000400000-0x0000000000451000-memory.dmp	upx

Identifies Wine through registry keys 2 TTPs 2 IoCs

Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

Processes:

596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exeWinlogon.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Wine	596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Wine	Winlogon.exe

Loads dropped DLL 10 IoCs

Processes:

596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exe24119.exemsiinst.exe

pid	process
1504	596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exe
1504	596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exe
1504	596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exe
1164	24119.exe
1164	24119.exe
1164	24119.exe
1164	24119.exe
1616	msiinst.exe
1616	msiinst.exe
1616	msiinst.exe

Windows security modification 2 TTPs 2 IoCs

Disabling Security Tools

Modify Registry

Processes:

596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exeWinlogon.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UACDisableNotify = "0"	596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UACDisableNotify = "0"	Winlogon.exe

Adds Run key to start application 2 TTPs 6 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

Processes:

24119.exeWinlogon.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\RunOnce\wextract_cleanup0 = "rundll32.exe C:\\Windows\\system32\\advpack.dll,DelNodeRunDLL32 \"C:\\Users\\Admin\\AppData\\Local\\Temp\\IXP000.TMP\\\""	24119.exe
Key created	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Windows\CurrentVersion\Run	Winlogon.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Windows\CurrentVersion\Run\Iceberg = "\"C:\\Users\\Admin\\AppData\\Roaming\\1ceb3rg.exe\""	Winlogon.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run	Winlogon.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Iceberg = "\"C:\\Users\\Admin\\AppData\\Roaming\\1ceb3rg.exe\""	Winlogon.exe
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\RunOnce	24119.exe

Checks whether UAC is enabled 1 TTPs 2 IoCs

System Information Discovery

T1082

Processes:

Winlogon.exe596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exe

description	ioc	process
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\EnableLUA = "0"	596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exe

Drops file in Program Files directory 21 IoCs

Processes:

Winlogon.exe

description	ioc	process
File created	C:\Program Files\appleJuice\incoming\PhotoshopCS6.exe	Winlogon.exe
File created	C:\Program Files\WinMX\My Shared Folder\PhotoshopCS6.exe	Winlogon.exe
File created	C:\Program Files\Swaptor\Download\PhotoshopCS6.exe	Winlogon.exe
File created	C:\Program Files\Morpheus\My Shared Folder\PhotoshopCS6.exe	Winlogon.exe
File created	C:\Program Files\BearShare\Shared\PhotoshopCS6.exe	Winlogon.exe
File created	C:\Program Files\KaZaA Lite\My Shared Folder\PhotoshopCS6.exe	Winlogon.exe
File created	C:\Program Files\Filetopia3\Files\PhotoshopCS6.exe	Winlogon.exe
File created	C:\Program Files\ICQ\shared files\PhotoshopCS6.exe	Winlogon.exe
File created	C:\Program Files\Tesla\Files\PhotoshopCS6.exe	Winlogon.exe
File created	C:\Program Files\eMule\Incoming\PhotoshopCS6.exe	Winlogon.exe
File created	C:\Program Files\LimeWire\Shared\PhotoshopCS6.exe	Winlogon.exe
File created	C:\Program Files\Ares\My Shared Folder\PhotoshopCS6.exe	Winlogon.exe
File created	C:\Program Files\Grokster\My Grokster\PhotoshopCS6.exe	Winlogon.exe
File created	C:\Program Files\KaZaA\My Shared Folder\PhotoshopCS6.exe	Winlogon.exe
File created	C:\Program Files\Direct Connect\Received Files\PhotoshopCS6.exe	Winlogon.exe
File created	C:\Program Files\Overnet\incoming\PhotoshopCS6.exe	Winlogon.exe
File created	C:\Program Files\KMD\My Shared Folder\PhotoshopCS6.exe	Winlogon.exe
File created	C:\Program Files\EDONKEY2000\incoming\PhotoshopCS6.exe	Winlogon.exe
File created	C:\Program Files\Gnucleus\Downloads\PhotoshopCS6.exe	Winlogon.exe
File created	C:\Program Files\XoloX\Downloads\PhotoshopCS6.exe	Winlogon.exe
File created	C:\Program Files\Rapigator\Share\PhotoshopCS6.exe	Winlogon.exe

Launches sc.exe 1 IoCs
Sc.exe is a Windows utlilty to control services on the system.

Processes:

sc.exe

pid process

1772 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Modifies registry key 1 TTPs 1 IoCs

Modify Registry
T1112

Processes:

reg.exe

pid process

1732 reg.exe
Runs net.exe

pid	process
1772	sc.exe

pid	process
1732	reg.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exeWinlogon.exe

pid	process
1504	596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exe
1504	596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exe
964	Winlogon.exe
964	Winlogon.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exeWinlogon.exe

description	pid	process
Token: SeBackupPrivilege	1504	596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exe
Token: SeBackupPrivilege	964	Winlogon.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exeWinlogon.exe

pid process

1504 596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exe
964 Winlogon.exe

Suspicious use of WriteProcessMemory 34 IoCs

Processes:

596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exeWinlogon.exenet.exe24119.exe

description	pid	process	target process
PID 1504 wrote to memory of 964	1504	596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exe	Winlogon.exe
PID 1504 wrote to memory of 964	1504	596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exe	Winlogon.exe
PID 1504 wrote to memory of 964	1504	596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exe	Winlogon.exe
PID 1504 wrote to memory of 964	1504	596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exe	Winlogon.exe
PID 964 wrote to memory of 1732	964	Winlogon.exe	reg.exe
PID 964 wrote to memory of 1732	964	Winlogon.exe	reg.exe
PID 964 wrote to memory of 1732	964	Winlogon.exe	reg.exe
PID 964 wrote to memory of 1732	964	Winlogon.exe	reg.exe
PID 964 wrote to memory of 1772	964	Winlogon.exe	sc.exe
PID 964 wrote to memory of 1772	964	Winlogon.exe	sc.exe
PID 964 wrote to memory of 1772	964	Winlogon.exe	sc.exe
PID 964 wrote to memory of 1772	964	Winlogon.exe	sc.exe
PID 964 wrote to memory of 468	964	Winlogon.exe	net.exe
PID 964 wrote to memory of 468	964	Winlogon.exe	net.exe
PID 964 wrote to memory of 468	964	Winlogon.exe	net.exe
PID 964 wrote to memory of 468	964	Winlogon.exe	net.exe
PID 468 wrote to memory of 1916	468	net.exe	net1.exe
PID 468 wrote to memory of 1916	468	net.exe	net1.exe
PID 468 wrote to memory of 1916	468	net.exe	net1.exe
PID 468 wrote to memory of 1916	468	net.exe	net1.exe
PID 1504 wrote to memory of 1164	1504	596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exe	24119.exe
PID 1504 wrote to memory of 1164	1504	596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exe	24119.exe
PID 1504 wrote to memory of 1164	1504	596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exe	24119.exe
PID 1504 wrote to memory of 1164	1504	596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exe	24119.exe
PID 1504 wrote to memory of 1164	1504	596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exe	24119.exe
PID 1504 wrote to memory of 1164	1504	596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exe	24119.exe
PID 1504 wrote to memory of 1164	1504	596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exe	24119.exe
PID 1164 wrote to memory of 1616	1164	24119.exe	msiinst.exe
PID 1164 wrote to memory of 1616	1164	24119.exe	msiinst.exe
PID 1164 wrote to memory of 1616	1164	24119.exe	msiinst.exe
PID 1164 wrote to memory of 1616	1164	24119.exe	msiinst.exe
PID 1164 wrote to memory of 1616	1164	24119.exe	msiinst.exe
PID 1164 wrote to memory of 1616	1164	24119.exe	msiinst.exe
PID 1164 wrote to memory of 1616	1164	24119.exe	msiinst.exe

System policy modification 1 TTPs 2 IoCs

evasion

Modify Registry

Processes:

Winlogon.exe596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exe

description	ioc	process
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\EnableLUA = "0"	596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exe

C:\Users\Admin\AppData\Local\Temp\596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exe
"C:\Users\Admin\AppData\Local\Temp\596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exe"
1⤵
- UAC bypass
- Windows security bypass
- Identifies Wine through registry keys
- Loads dropped DLL
- Windows security modification
- Checks whether UAC is enabled
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
- System policy modification
PID:1504

C:\Users\Admin\AppData\Local\Temp\Winlogon.exe
C:\Users\Admin\AppData\Local\Temp\Winlogon.exe
2⤵
- Modifies WinLogon for persistence
- Modifies security service
- UAC bypass
- Windows security bypass
- Adds policy Run key to start application
- Drops file in Drivers directory
- Executes dropped EXE
- Identifies Wine through registry keys
- Windows security modification
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
- System policy modification
PID:964

C:\Windows\SysWOW64\reg.exe
reg add hkcu\software\microsoft\windows\currentversion\policies\system /v disableregistrytools /t reg_dword /d "1" /f
3⤵
- Disables RegEdit via registry modification
- Modifies registry key
PID:1732

C:\Windows\SysWOW64\sc.exe
sc stop SharedAccess
3⤵
- Launches sc.exe
PID:1772

C:\Windows\SysWOW64\net.exe
net stop wscsvc
3⤵
- Suspicious use of WriteProcessMemory
PID:468

C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop wscsvc
4⤵
PID:1916

C:\Users\Admin\AppData\Local\Temp\24119.exe
C:\Users\Admin\AppData\Local\Temp\24119.exe
2⤵
- Executes dropped EXE
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1164

C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\msiinst.exe
C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\msiinst.exe /i instmsi.msi MSIEXECREG=1 /m /qb+!
3⤵
- Executes dropped EXE
- Loads dropped DLL
PID:1616

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

T1004

Modify Existing Service

T1031

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Bypass User Account Control

T1088

Defense Evasion

Modify Registry

Bypass User Account Control

T1088

Disabling Security Tools