betabot | 4d850649831a4cad6dd9d2a6b67fbacc70933c15dd4bd56ff6ffdb27da7aa4a8

Windows Service

T1543.003

Processes:

explorer.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile	explorer.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\EnableFirewall = "0"	explorer.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\PublicProfile	explorer.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\PublicProfile\EnableFirewall = "0"	explorer.exe

SmokeLoader
Modular backdoor trojan in use since 2014.
trojan backdoor smokeloader

Sets file execution options in registry 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

Modify Registry

Processes:

DE4A.exeexplorer.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\37ayq53k.exe\DisableExceptionChainValidation	DE4A.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\rstrui.exe	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\rstrui.exe\Debugger = "sml.exe"	explorer.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\37ayq53k.exe	DE4A.exe

Checks BIOS information in registry 2 TTPs 1 IoCs
BIOS information is often read in order to detect sandboxing environments.

Query Registry
T1012

System Information Discovery
T1082

Processes:

explorer.exe

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion explorer.exe
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.

Query Registry
T1012

System Information Discovery
T1082

Processes:

E5FC.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-3336304223-2978740688-3645194410-1000\Control Panel\International\Geo\Nation E5FC.exe
Deletes itself 1 IoCs

Processes:

pid process

3412
Executes dropped EXE 4 IoCs

Processes:

DE4A.exeE5FC.exeWindowsUpdater.exedbjcuws

pid process

464 DE4A.exe
564 E5FC.exe
3424 WindowsUpdater.exe
1564 dbjcuws
Loads dropped DLL 4 IoCs

Processes:

07ceef005d2626297437e3289872bf40.exeWindowsUpdater.exedbjcuws

pid process

4792 07ceef005d2626297437e3289872bf40.exe
3424 WindowsUpdater.exe
3424 WindowsUpdater.exe
1564 dbjcuws

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	explorer.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3336304223-2978740688-3645194410-1000\Control Panel\International\Geo\Nation	E5FC.exe

pid	process
3412

pid	process
464	DE4A.exe
564	E5FC.exe
3424	WindowsUpdater.exe
1564	dbjcuws

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

Modify Registry

Processes:

explorer.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3336304223-2978740688-3645194410-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Java Updater = "C:\\ProgramData\\Java Updater\\37ayq53k.exe"	explorer.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3336304223-2978740688-3645194410-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Java Updater = "\"C:\\ProgramData\\Java Updater\\37ayq53k.exe\""	explorer.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs
evasion trojan

System Information Discovery
T1082

Processes:

DE4A.exe

description ioc process

Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA DE4A.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 8 IoCs

Processes:

DE4A.exeexplorer.exe

pid process

464 DE4A.exe
2992 explorer.exe
2992 explorer.exe
2992 explorer.exe
2992 explorer.exe
2992 explorer.exe
2992 explorer.exe
2992 explorer.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

868 2992 WerFault.exe explorer.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	DE4A.exe

pid	process
464	DE4A.exe
2992	explorer.exe
2992	explorer.exe
2992	explorer.exe
2992	explorer.exe
2992	explorer.exe
2992	explorer.exe
2992	explorer.exe

pid	pid_target	process	target process
868	2992	WerFault.exe	explorer.exe

NSIS installer 8 IoCs

installer

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\E5FC.exe	nsis_installer_2
C:\Users\Admin\AppData\Local\Temp\E5FC.exe	nsis_installer_2
C:\Users\Admin\AppData\Local\Temp\WindowsUpdater.exe	nsis_installer_1
C:\Users\Admin\AppData\Local\Temp\WindowsUpdater.exe	nsis_installer_2
C:\Users\Admin\AppData\Local\Temp\WindowsUpdater.exe	nsis_installer_1
C:\Users\Admin\AppData\Local\Temp\WindowsUpdater.exe	nsis_installer_2
C:\Users\Admin\AppData\Local\Temp\WindowsUpdater.exe	nsis_installer_1
C:\Users\Admin\AppData\Local\Temp\WindowsUpdater.exe	nsis_installer_2

Checks SCSI registry key(s) 3 TTPs 6 IoCs

SCSI information is often read in order to detect sandboxing environments.

Query Registry

Peripheral Device Discovery

T1120

System Information Discovery

Processes:

dbjcuws07ceef005d2626297437e3289872bf40.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	dbjcuws
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	dbjcuws
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	dbjcuws
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	07ceef005d2626297437e3289872bf40.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	07ceef005d2626297437e3289872bf40.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	07ceef005d2626297437e3289872bf40.exe

Checks processor information in registry 2 TTPs 4 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

System Information Discovery

Processes:

DE4A.exeexplorer.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	DE4A.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	DE4A.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	explorer.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	explorer.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

System Information Discovery

Processes:

explorer.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS	explorer.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemManufacturer	explorer.exe

Modifies Internet Explorer Protected Mode 1 TTPs 4 IoCs

Modify Registry

Processes:

explorer.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-3336304223-2978740688-3645194410-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\1\2500 = "3"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3336304223-2978740688-3645194410-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\2\2500 = "3"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3336304223-2978740688-3645194410-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3\2500 = "3"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3336304223-2978740688-3645194410-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\4\2500 = "3"	explorer.exe

Modifies Internet Explorer Protected Mode Banner 1 TTPs 1 IoCs

Modify Registry

Processes:

explorer.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-3336304223-2978740688-3645194410-1000\SOFTWARE\Microsoft\Internet Explorer\Main\NoProtectedModeBanner = "1"	explorer.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs
adware spyware

Modify Registry
T1112

Processes:

explorer.exe

description ioc process

Key created \REGISTRY\USER\S-1-5-21-3336304223-2978740688-3645194410-1000\Software\Microsoft\Internet Explorer\Main explorer.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3336304223-2978740688-3645194410-1000\Software\Microsoft\Internet Explorer\Main	explorer.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

07ceef005d2626297437e3289872bf40.exe

pid	process
4792	07ceef005d2626297437e3289872bf40.exe
4792	07ceef005d2626297437e3289872bf40.exe
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412
3412

Suspicious behavior: MapViewOfSection 4 IoCs

Processes:

07ceef005d2626297437e3289872bf40.exeDE4A.exedbjcuws

pid process

4792 07ceef005d2626297437e3289872bf40.exe
464 DE4A.exe
464 DE4A.exe
1564 dbjcuws

Suspicious use of AdjustPrivilegeToken 30 IoCs

Processes:

DE4A.exeexplorer.exe

description	pid	process
Token: SeDebugPrivilege	464	DE4A.exe
Token: SeRestorePrivilege	464	DE4A.exe
Token: SeBackupPrivilege	464	DE4A.exe
Token: SeLoadDriverPrivilege	464	DE4A.exe
Token: SeCreatePagefilePrivilege	464	DE4A.exe
Token: SeShutdownPrivilege	464	DE4A.exe
Token: SeTakeOwnershipPrivilege	464	DE4A.exe
Token: SeChangeNotifyPrivilege	464	DE4A.exe
Token: SeCreateTokenPrivilege	464	DE4A.exe
Token: SeMachineAccountPrivilege	464	DE4A.exe
Token: SeSecurityPrivilege	464	DE4A.exe
Token: SeAssignPrimaryTokenPrivilege	464	DE4A.exe
Token: SeCreateGlobalPrivilege	464	DE4A.exe
Token: 33	464	DE4A.exe
Token: SeDebugPrivilege	2992	explorer.exe
Token: SeRestorePrivilege	2992	explorer.exe
Token: SeBackupPrivilege	2992	explorer.exe
Token: SeLoadDriverPrivilege	2992	explorer.exe
Token: SeCreatePagefilePrivilege	2992	explorer.exe
Token: SeShutdownPrivilege	2992	explorer.exe
Token: SeTakeOwnershipPrivilege	2992	explorer.exe
Token: SeChangeNotifyPrivilege	2992	explorer.exe
Token: SeCreateTokenPrivilege	2992	explorer.exe
Token: SeMachineAccountPrivilege	2992	explorer.exe
Token: SeSecurityPrivilege	2992	explorer.exe
Token: SeAssignPrimaryTokenPrivilege	2992	explorer.exe
Token: SeCreateGlobalPrivilege	2992	explorer.exe
Token: 33	2992	explorer.exe
Token: SeShutdownPrivilege	3412
Token: SeCreatePagefilePrivilege	3412

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

DE4A.exeE5FC.exe

description	pid	process	target process
PID 3412 wrote to memory of 464	3412		DE4A.exe
PID 3412 wrote to memory of 464	3412		DE4A.exe
PID 3412 wrote to memory of 464	3412		DE4A.exe
PID 3412 wrote to memory of 564	3412		E5FC.exe
PID 3412 wrote to memory of 564	3412		E5FC.exe
PID 3412 wrote to memory of 564	3412		E5FC.exe
PID 464 wrote to memory of 2992	464	DE4A.exe	explorer.exe
PID 464 wrote to memory of 2992	464	DE4A.exe	explorer.exe
PID 464 wrote to memory of 2992	464	DE4A.exe	explorer.exe
PID 564 wrote to memory of 3424	564	E5FC.exe	WindowsUpdater.exe
PID 564 wrote to memory of 3424	564	E5FC.exe	WindowsUpdater.exe
PID 564 wrote to memory of 3424	564	E5FC.exe	WindowsUpdater.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\07ceef005d2626297437e3289872bf40.exe
"C:\Users\Admin\AppData\Local\Temp\07ceef005d2626297437e3289872bf40.exe"
1⤵
- Loads dropped DLL
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
PID:4792

C:\Users\Admin\AppData\Local\Temp\DE4A.exe
C:\Users\Admin\AppData\Local\Temp\DE4A.exe
1⤵
- Sets file execution options in registry
- Executes dropped EXE
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Checks processor information in registry
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:464

C:\Windows\SysWOW64\explorer.exe
C:\Windows\SysWOW64\explorer.exe
2⤵
- Modifies firewall policy service
- Sets file execution options in registry
- Checks BIOS information in registry
- Adds Run key to start application
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Checks processor information in registry
- Enumerates system info in registry
- Modifies Internet Explorer Protected Mode
- Modifies Internet Explorer Protected Mode Banner
- Modifies Internet Explorer settings
- Suspicious use of AdjustPrivilegeToken
PID:2992

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2992 -s 1108
3⤵
- Program crash
PID:868

C:\Users\Admin\AppData\Local\Temp\E5FC.exe
C:\Users\Admin\AppData\Local\Temp\E5FC.exe
1⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:564

C:\Users\Admin\AppData\Local\Temp\WindowsUpdater.exe
"C:\Users\Admin\AppData\Local\Temp\WindowsUpdater.exe"
2⤵
- Executes dropped EXE
- Loads dropped DLL
PID:3424

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2992 -ip 2992
1⤵
PID:4904

C:\Users\Admin\AppData\Roaming\dbjcuws
C:\Users\Admin\AppData\Roaming\dbjcuws
1⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks SCSI registry key(s)
- Suspicious behavior: MapViewOfSection
PID:1564

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Create or Modify System Process

T1543

Windows Service

T1543.003

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

Privilege Escalation

Create or Modify System Process

T1543

Windows Service

T1543.003

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

Defense Evasion

Modify Registry

Credential Access

Discovery

Query Registry

System Information Discovery