saintbot | b1af67bcfaa99c369960580f86e7c1a42fc473dd85a0a4d3b1c989a6bc138a42

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\Control Panel\International\Geo\Nation	b1af67bcfaa99c369960580f86e7c1a42fc473dd85a0a4d3b1c989a6bc138a42.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\41828.exe	b1af67bcfaa99c369960580f86e7c1a42fc473dd85a0a4d3b1c989a6bc138a42.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\41828.exe	41828.exe

Executes dropped EXE 1 IoCs

pid	Process
4216	41828.exe

Loads dropped DLL 2 IoCs

pid	Process
4216	41828.exe
916	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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum	EhStorAuthn.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	EhStorAuthn.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum	b1af67bcfaa99c369960580f86e7c1a42fc473dd85a0a4d3b1c989a6bc138a42.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	b1af67bcfaa99c369960580f86e7c1a42fc473dd85a0a4d3b1c989a6bc138a42.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum	41828.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	41828.exe

Drops file in System32 directory 1 IoCs

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

Program crash 2 IoCs

pid	pid_target	Process	procid_target
3636	4592	WerFault.exe	85
448	4216	WerFault.exe	93

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

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

pid	Process
3168	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
5100	PING.EXE

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 4592 wrote to memory of 4216	4592	b1af67bcfaa99c369960580f86e7c1a42fc473dd85a0a4d3b1c989a6bc138a42.exe	93
PID 4592 wrote to memory of 4216	4592	b1af67bcfaa99c369960580f86e7c1a42fc473dd85a0a4d3b1c989a6bc138a42.exe	93
PID 4592 wrote to memory of 4216	4592	b1af67bcfaa99c369960580f86e7c1a42fc473dd85a0a4d3b1c989a6bc138a42.exe	93
PID 4592 wrote to memory of 680	4592	b1af67bcfaa99c369960580f86e7c1a42fc473dd85a0a4d3b1c989a6bc138a42.exe	94
PID 4592 wrote to memory of 680	4592	b1af67bcfaa99c369960580f86e7c1a42fc473dd85a0a4d3b1c989a6bc138a42.exe	94
PID 4592 wrote to memory of 680	4592	b1af67bcfaa99c369960580f86e7c1a42fc473dd85a0a4d3b1c989a6bc138a42.exe	94
PID 680 wrote to memory of 5100	680	cmd.exe	98
PID 680 wrote to memory of 5100	680	cmd.exe	98
PID 680 wrote to memory of 5100	680	cmd.exe	98
PID 680 wrote to memory of 1312	680	cmd.exe	101
PID 680 wrote to memory of 1312	680	cmd.exe	101
PID 680 wrote to memory of 1312	680	cmd.exe	101
PID 4216 wrote to memory of 916	4216	41828.exe	104
PID 4216 wrote to memory of 916	4216	41828.exe	104
PID 4216 wrote to memory of 916	4216	41828.exe	104
PID 4216 wrote to memory of 916	4216	41828.exe	104
PID 916 wrote to memory of 3168	916	EhStorAuthn.exe	107
PID 916 wrote to memory of 3168	916	EhStorAuthn.exe	107
PID 916 wrote to memory of 3168	916	EhStorAuthn.exe	107

C:\Users\Admin\AppData\Local\Temp\b1af67bcfaa99c369960580f86e7c1a42fc473dd85a0a4d3b1c989a6bc138a42.exe
"C:\Users\Admin\AppData\Local\Temp\b1af67bcfaa99c369960580f86e7c1a42fc473dd85a0a4d3b1c989a6bc138a42.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Maps connected drives based on registry
- Suspicious use of WriteProcessMemory
PID:4592
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\41828.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\41828.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Loads dropped DLL
  - Maps connected drives based on registry
  - Suspicious use of WriteProcessMemory
  PID:4216
- - C:\Windows\SysWOW64\EhStorAuthn.exe
    "C:\Windows\System32\EhStorAuthn.exe"
    3⤵
    - Loads dropped DLL
    - Maps connected drives based on registry
    - Drops file in System32 directory
    - Checks processor information in registry
    - Suspicious use of WriteProcessMemory
    PID:916
  - - 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:3168
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4216 -s 620
    3⤵
    - Program crash
    PID:448
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Roaming\del.bat
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:680
- - C:\Windows\SysWOW64\PING.EXE
    ping localhost -n 3
    3⤵
    - Runs ping.exe
    PID:5100
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c del "C:\Users\Admin\AppData\Roaming\del.bat"
    3⤵
    PID:1312
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4592 -s 1144
  2⤵
  - Program crash
  PID:3636

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 4592 -ip 4592
1⤵
PID:5116

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 4216 -ip 4216
1⤵
PID:2092

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

Persistence

Scheduled Task/Job

Privilege Escalation

Scheduled Task/Job

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

Remote System Discovery

T1018

System Information Discovery