saintbot | b6e34665dd0d045c2c79bf3148f34da0b877514a6b083b7c8c7e2577362463b3

System Information Discovery

Processes:

b6e34665dd0d045c2c79bf3148f34da0b877514a6b083b7c8c7e2577362463b3.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-399997616-3400990511-967324271-1000\Control Panel\International\Geo\Nation	b6e34665dd0d045c2c79bf3148f34da0b877514a6b083b7c8c7e2577362463b3.exe

Drops startup file 2 IoCs

Processes:

b6e34665dd0d045c2c79bf3148f34da0b877514a6b083b7c8c7e2577362463b3.exe37798.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\37798.exe	b6e34665dd0d045c2c79bf3148f34da0b877514a6b083b7c8c7e2577362463b3.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\37798.exe	37798.exe

Executes dropped EXE 1 IoCs

Processes:

37798.exe

pid process

2908 37798.exe
Loads dropped DLL 2 IoCs

Processes:

37798.exeEhStorAuthn.exe

pid process

2908 37798.exe
1804 EhStorAuthn.exe

pid	process
2908	37798.exe

pid	process
2908	37798.exe
1804	EhStorAuthn.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

EhStorAuthn.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-399997616-3400990511-967324271-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ = "C:\\Users\\Admin\\AppData\\Local\\z_Admin\\Admin.vbs"	EhStorAuthn.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Maps connected drives based on registry 3 TTPs 6 IoCs

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

Query Registry

Peripheral Device Discovery

T1120

System Information Discovery

Processes:

b6e34665dd0d045c2c79bf3148f34da0b877514a6b083b7c8c7e2577362463b3.exe37798.exeEhStorAuthn.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum	b6e34665dd0d045c2c79bf3148f34da0b877514a6b083b7c8c7e2577362463b3.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	b6e34665dd0d045c2c79bf3148f34da0b877514a6b083b7c8c7e2577362463b3.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum	37798.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	37798.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum	EhStorAuthn.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	EhStorAuthn.exe

Drops file in System32 directory 1 IoCs

Processes:

EhStorAuthn.exe

description ioc process

File opened for modification C:\Windows\SysWOW64\EhStorAuthn.exe EhStorAuthn.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\EhStorAuthn.exe	EhStorAuthn.exe

Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid	pid_target	process	target process
2488	3980	WerFault.exe	b6e34665dd0d045c2c79bf3148f34da0b877514a6b083b7c8c7e2577362463b3.exe
1808	2908	WerFault.exe	37798.exe

Checks processor information in registry 2 TTPs 2 IoCs

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

Query Registry

System Information Discovery

Processes:

EhStorAuthn.exe

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

Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task/Job
T1053

Processes:

schtasks.exe

pid process

4988 schtasks.exe
Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery
T1018

Processes:

PING.EXE

pid process

4692 PING.EXE
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

37798.exe

pid process

2908 37798.exe
2908 37798.exe

pid	process
4988	schtasks.exe

pid	process
4692	PING.EXE

pid	process
2908	37798.exe
2908	37798.exe

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

b6e34665dd0d045c2c79bf3148f34da0b877514a6b083b7c8c7e2577362463b3.execmd.exe37798.exeEhStorAuthn.exe

description	pid	process	target process
PID 3980 wrote to memory of 2908	3980	b6e34665dd0d045c2c79bf3148f34da0b877514a6b083b7c8c7e2577362463b3.exe	37798.exe
PID 3980 wrote to memory of 2908	3980	b6e34665dd0d045c2c79bf3148f34da0b877514a6b083b7c8c7e2577362463b3.exe	37798.exe
PID 3980 wrote to memory of 2908	3980	b6e34665dd0d045c2c79bf3148f34da0b877514a6b083b7c8c7e2577362463b3.exe	37798.exe
PID 3980 wrote to memory of 2916	3980	b6e34665dd0d045c2c79bf3148f34da0b877514a6b083b7c8c7e2577362463b3.exe	cmd.exe
PID 3980 wrote to memory of 2916	3980	b6e34665dd0d045c2c79bf3148f34da0b877514a6b083b7c8c7e2577362463b3.exe	cmd.exe
PID 3980 wrote to memory of 2916	3980	b6e34665dd0d045c2c79bf3148f34da0b877514a6b083b7c8c7e2577362463b3.exe	cmd.exe
PID 2916 wrote to memory of 4692	2916	cmd.exe	PING.EXE
PID 2916 wrote to memory of 4692	2916	cmd.exe	PING.EXE
PID 2916 wrote to memory of 4692	2916	cmd.exe	PING.EXE
PID 2916 wrote to memory of 4352	2916	cmd.exe	cmd.exe
PID 2916 wrote to memory of 4352	2916	cmd.exe	cmd.exe
PID 2916 wrote to memory of 4352	2916	cmd.exe	cmd.exe
PID 2908 wrote to memory of 1804	2908	37798.exe	EhStorAuthn.exe
PID 2908 wrote to memory of 1804	2908	37798.exe	EhStorAuthn.exe
PID 2908 wrote to memory of 1804	2908	37798.exe	EhStorAuthn.exe
PID 2908 wrote to memory of 1804	2908	37798.exe	EhStorAuthn.exe
PID 1804 wrote to memory of 4988	1804	EhStorAuthn.exe	schtasks.exe
PID 1804 wrote to memory of 4988	1804	EhStorAuthn.exe	schtasks.exe
PID 1804 wrote to memory of 4988	1804	EhStorAuthn.exe	schtasks.exe

C:\Users\Admin\AppData\Local\Temp\b6e34665dd0d045c2c79bf3148f34da0b877514a6b083b7c8c7e2577362463b3.exe
"C:\Users\Admin\AppData\Local\Temp\b6e34665dd0d045c2c79bf3148f34da0b877514a6b083b7c8c7e2577362463b3.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Maps connected drives based on registry
- Suspicious use of WriteProcessMemory
PID:3980

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\37798.exe
"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\37798.exe"
2⤵
- Drops startup file
- Executes dropped EXE
- Loads dropped DLL
- Maps connected drives based on registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2908

C:\Windows\SysWOW64\EhStorAuthn.exe
"C:\Windows\System32\EhStorAuthn.exe"
3⤵
- Loads dropped DLL
- Adds Run key to start application
- Maps connected drives based on registry
- Drops file in System32 directory
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:1804

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 5 /tn "Maintenance" /tr "C:\Users\%USERNAME%\AppData\Local\z_%USERNAME%\%USERNAME%.vbs" /F
4⤵
- Creates scheduled task(s)
PID:4988

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2908 -s 616
3⤵
- Program crash
PID:1808

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Roaming\del.bat
2⤵
- Suspicious use of WriteProcessMemory
PID:2916

C:\Windows\SysWOW64\PING.EXE
ping localhost -n 3
3⤵
- Runs ping.exe
PID:4692

C:\Windows\SysWOW64\cmd.exe
cmd /c del "C:\Users\Admin\AppData\Roaming\del.bat"
3⤵
PID:4352

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3980 -s 896
2⤵
- Program crash
PID:2488

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3980 -ip 3980
1⤵
PID:1432

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 2908 -ip 2908
1⤵
PID:4724

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

4

System Information Discovery

4

Peripheral Device Discovery

T1120

Remote System Discovery