596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2

Processes:

Winlogon.exe

description	ioc	process
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
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

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-1-5-21-2295526160-1155304984-640977766-1000\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.exe41125.exemsiinst.exe

pid process

3256 Winlogon.exe
5100 41125.exe
4572 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
3256	Winlogon.exe
5100	41125.exe
4572	msiinst.exe

UPX packed file 7 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/388-132-0x0000000000400000-0x0000000000451000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\Winlogon.exe	upx
C:\Users\Admin\AppData\Local\Temp\Winlogon.exe	upx
behavioral2/memory/3256-140-0x0000000000400000-0x0000000000451000-memory.dmp	upx
behavioral2/memory/3256-145-0x0000000000400000-0x0000000000451000-memory.dmp	upx
behavioral2/memory/388-146-0x0000000000400000-0x0000000000451000-memory.dmp	upx
behavioral2/memory/388-150-0x0000000000400000-0x0000000000451000-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

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:

Winlogon.exe41125.exe

description	ioc	process
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	41125.exe
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\\\""	41125.exe
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows\CurrentVersion\Run	Winlogon.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\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

Checks whether UAC is enabled 1 TTPs 2 IoCs

System Information Discovery

T1082

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

Drops file in Program Files directory 21 IoCs

Processes:

Winlogon.exe

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

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

Processes:

sc.exe

pid process

2108 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

3876 reg.exe
Runs net.exe

pid	process
2108	sc.exe

pid	process
3876	reg.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

Processes:

596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exeWinlogon.exe

pid	process
388	596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exe
388	596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exe
388	596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exe
388	596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exe
3256	Winlogon.exe
3256	Winlogon.exe
3256	Winlogon.exe
3256	Winlogon.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exeWinlogon.exe

description	pid	process
Token: SeBackupPrivilege	388	596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exe
Token: SeBackupPrivilege	3256	Winlogon.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exeWinlogon.exe

pid process

388 596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exe
3256 Winlogon.exe

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exeWinlogon.exenet.exe41125.exe

description	pid	process	target process
PID 388 wrote to memory of 3256	388	596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exe	Winlogon.exe
PID 388 wrote to memory of 3256	388	596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exe	Winlogon.exe
PID 388 wrote to memory of 3256	388	596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exe	Winlogon.exe
PID 3256 wrote to memory of 3876	3256	Winlogon.exe	reg.exe
PID 3256 wrote to memory of 3876	3256	Winlogon.exe	reg.exe
PID 3256 wrote to memory of 3876	3256	Winlogon.exe	reg.exe
PID 3256 wrote to memory of 2108	3256	Winlogon.exe	sc.exe
PID 3256 wrote to memory of 2108	3256	Winlogon.exe	sc.exe
PID 3256 wrote to memory of 2108	3256	Winlogon.exe	sc.exe
PID 3256 wrote to memory of 856	3256	Winlogon.exe	net.exe
PID 3256 wrote to memory of 856	3256	Winlogon.exe	net.exe
PID 3256 wrote to memory of 856	3256	Winlogon.exe	net.exe
PID 856 wrote to memory of 4432	856	net.exe	net1.exe
PID 856 wrote to memory of 4432	856	net.exe	net1.exe
PID 856 wrote to memory of 4432	856	net.exe	net1.exe
PID 388 wrote to memory of 5100	388	596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exe	41125.exe
PID 388 wrote to memory of 5100	388	596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exe	41125.exe
PID 388 wrote to memory of 5100	388	596d29b8563a1382954a5f845fe17e324b940e5a02d2f3d4c3d9782b8561d0a2.exe	41125.exe
PID 5100 wrote to memory of 4572	5100	41125.exe	msiinst.exe
PID 5100 wrote to memory of 4572	5100	41125.exe	msiinst.exe
PID 5100 wrote to memory of 4572	5100	41125.exe	msiinst.exe

System policy modification 1 TTPs 2 IoCs

evasion

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

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
- 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:388

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:3256

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:3876

C:\Windows\SysWOW64\sc.exe
sc stop SharedAccess
3⤵
- Launches sc.exe
PID:2108

C:\Windows\SysWOW64\net.exe
net stop wscsvc
3⤵
- Suspicious use of WriteProcessMemory
PID:856

C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop wscsvc
4⤵
PID:4432

C:\Users\Admin\AppData\Local\Temp\41125.exe
C:\Users\Admin\AppData\Local\Temp\41125.exe
2⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:5100

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
PID:4572

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

T1031

Registry Run Keys / Startup Folder

T1060

Winlogon Helper DLL

T1004

Privilege Escalation

Bypass User Account Control

T1088

Defense Evasion

Bypass User Account Control

T1088

Disabling Security Tools

Impair Defenses

T1562

Modify Registry