saintbot | 933131c3dcbcb3bcebbec74e2b66c6793136ede4808d89019b7edf908e6343c8

General

Target

Update-AV.exe
Size

223KB
MD5

893b17ed65ecffa8376063349f22d2bc
SHA1

50c556277899d6b9da5ec125c0a58650a14a08a7
SHA256

ebbf30e06de3a25f76cf43c72c521d14a27053e4d9be566b41f50c41bea3a7a9
SHA512

e61a215547991592a204868a979ec513198a6ba192a692a97ccba352c427dc1721a433c0aaaa98107f2d91ae5d2b0aad57ea9ea86ca48a0d61b8a48ecef6b787
SSDEEP

3072:EwA6vAcT6agXrIISqRIYrCNrACDJi7kX9ne6uDxj5AiOhtSvLt2b:6cT6PXrI/qRIZrACGkX9niILtUt2b

Score

10^/10

saintbot discovery dropper persistence

Malware Config

Signatures

SaintBot
Saint Bot is a malware dropper being used to deliver secondary payloads such as information stealers.
dropper saintbot

SaintBot payload 11 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1340-2-0x0000000002D50000-0x0000000002D59000-memory.dmp	family_saintbot
behavioral2/memory/1340-3-0x0000000000400000-0x0000000002BA9000-memory.dmp	family_saintbot
behavioral2/memory/1340-19-0x0000000000400000-0x0000000002BA9000-memory.dmp	family_saintbot
behavioral2/memory/1340-20-0x0000000002D50000-0x0000000002D59000-memory.dmp	family_saintbot
behavioral2/memory/4508-21-0x0000000002C60000-0x0000000002D60000-memory.dmp	family_saintbot
behavioral2/memory/4508-22-0x0000000000400000-0x0000000002BA9000-memory.dmp	family_saintbot
behavioral2/memory/4508-25-0x0000000000400000-0x0000000002BA9000-memory.dmp	family_saintbot
behavioral2/memory/1564-26-0x0000000000750000-0x000000000075B000-memory.dmp	family_saintbot
behavioral2/memory/4508-27-0x0000000000400000-0x0000000002BA9000-memory.dmp	family_saintbot
behavioral2/memory/1564-29-0x0000000000750000-0x000000000075B000-memory.dmp	family_saintbot
behavioral2/memory/1564-30-0x0000000000750000-0x000000000075B000-memory.dmp	family_saintbot

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:

Update-AV.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	Update-AV.exe

Drops startup file 2 IoCs

Processes:

Update-AV.exe17424.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\17424.exe	Update-AV.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\17424.exe	17424.exe

Executes dropped EXE 1 IoCs

Processes:

17424.exe

pid process

4508 17424.exe
Loads dropped DLL 2 IoCs

Processes:

17424.exeEhStorAuthn.exe

pid process

4508 17424.exe
1564 EhStorAuthn.exe

pid	process
4508	17424.exe

pid	process
4508	17424.exe
1564	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-1-5-21-1497073144-2389943819-3385106915-1000\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

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

EhStorAuthn.exeUpdate-AV.exe17424.exe

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	Update-AV.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	Update-AV.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum	17424.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	17424.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
Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid pid_target process target process

1236 1340 WerFault.exe Update-AV.exe
2232 4508 WerFault.exe 17424.exe

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

pid	pid_target	process	target process
1236	1340	WerFault.exe	Update-AV.exe
2232	4508	WerFault.exe	17424.exe

Checks processor information in registry 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

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

1288 schtasks.exe
Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery
T1018

Processes:

PING.EXE

pid process

3716 PING.EXE
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

17424.exe

pid process

4508 17424.exe
4508 17424.exe

pid	process
1288	schtasks.exe

pid	process
3716	PING.EXE

pid	process
4508	17424.exe
4508	17424.exe

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

Update-AV.execmd.exe17424.exeEhStorAuthn.exe

description	pid	process	target process
PID 1340 wrote to memory of 4508	1340	Update-AV.exe	17424.exe
PID 1340 wrote to memory of 4508	1340	Update-AV.exe	17424.exe
PID 1340 wrote to memory of 4508	1340	Update-AV.exe	17424.exe
PID 1340 wrote to memory of 4232	1340	Update-AV.exe	cmd.exe
PID 1340 wrote to memory of 4232	1340	Update-AV.exe	cmd.exe
PID 1340 wrote to memory of 4232	1340	Update-AV.exe	cmd.exe
PID 4232 wrote to memory of 3716	4232	cmd.exe	PING.EXE
PID 4232 wrote to memory of 3716	4232	cmd.exe	PING.EXE
PID 4232 wrote to memory of 3716	4232	cmd.exe	PING.EXE
PID 4232 wrote to memory of 3472	4232	cmd.exe	cmd.exe
PID 4232 wrote to memory of 3472	4232	cmd.exe	cmd.exe
PID 4232 wrote to memory of 3472	4232	cmd.exe	cmd.exe
PID 4508 wrote to memory of 1564	4508	17424.exe	EhStorAuthn.exe
PID 4508 wrote to memory of 1564	4508	17424.exe	EhStorAuthn.exe
PID 4508 wrote to memory of 1564	4508	17424.exe	EhStorAuthn.exe
PID 4508 wrote to memory of 1564	4508	17424.exe	EhStorAuthn.exe
PID 1564 wrote to memory of 1288	1564	EhStorAuthn.exe	schtasks.exe
PID 1564 wrote to memory of 1288	1564	EhStorAuthn.exe	schtasks.exe
PID 1564 wrote to memory of 1288	1564	EhStorAuthn.exe	schtasks.exe

C:\Users\Admin\AppData\Local\Temp\Update-AV.exe
"C:\Users\Admin\AppData\Local\Temp\Update-AV.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Maps connected drives based on registry
- Suspicious use of WriteProcessMemory
PID:1340
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\17424.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\17424.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:4508
- - 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:1564
  - - 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:1288
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4508 -s 628
    3⤵
    - Program crash
    PID:2232
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Roaming\del.bat
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4232
- - C:\Windows\SysWOW64\PING.EXE
    ping localhost -n 3
    3⤵
    - Runs ping.exe
    PID:3716
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c del "C:\Users\Admin\AppData\Roaming\del.bat"
    3⤵
    PID:3472
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1340 -s 1240
  2⤵
  - Program crash
  PID:1236

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 1340 -ip 1340
1⤵
PID:1104

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 4508 -ip 4508
1⤵
PID:1188

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

Remote System Discovery

1

T1018

System Information Discovery

4

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\z_Admin\wallpaper.mp4

Filesize
1.6MB

MD5
4f3387277ccbd6d1f21ac5c07fe4ca68

SHA1
e16506f662dc92023bf82def1d621497c8ab5890

SHA256
767a3fc4a7a6818cdc3f0b99aaa95db694f6bcde719d2057a88b3d4df3d74fac

SHA512
9da199ac69e3c0d4e0c6307e0ab8178f12cc25cb2f14c3511f6b64e6e60a925c860f3263cb38353a97b55a71ef4d27f8cb7fa3cfc08e7c1a349fd8d209dfa219

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\17424.exe

Filesize
223KB

MD5
893b17ed65ecffa8376063349f22d2bc

SHA1
50c556277899d6b9da5ec125c0a58650a14a08a7

SHA256
ebbf30e06de3a25f76cf43c72c521d14a27053e4d9be566b41f50c41bea3a7a9

SHA512
e61a215547991592a204868a979ec513198a6ba192a692a97ccba352c427dc1721a433c0aaaa98107f2d91ae5d2b0aad57ea9ea86ca48a0d61b8a48ecef6b787

Download Submit
C:\Users\Admin\AppData\Roaming\del.bat

Filesize
115B

MD5
46452764fc9de6ac55fde1e0b8c5c7e4

SHA1
5cad2dd721e69564b9651cad7c58c743d0e279f3

SHA256
2ab012ddb11a5934e3a0082f1fe59fb723898678b022447b3794692f72e95ebc

SHA512
38d57bec9d536c8d808b1d02c497a61815ad17d6dee9f9c12e21787230e657c64a0fb337cb6f0283c6bb9dc424f402d530ade3fcaa3164b0deae53dbf7ec7bf3

Download Submit
memory/1340-2-0x0000000002D50000-0x0000000002D59000-memory.dmp

Filesize
36KB

Download
memory/1340-1-0x0000000002D90000-0x0000000002E90000-memory.dmp

Filesize
1024KB

Download
memory/1340-19-0x0000000000400000-0x0000000002BA9000-memory.dmp

Filesize
39.7MB

Download
memory/1340-20-0x0000000002D50000-0x0000000002D59000-memory.dmp

Filesize
36KB

Download
memory/1340-3-0x0000000000400000-0x0000000002BA9000-memory.dmp

Filesize
39.7MB

Download
memory/1564-26-0x0000000000750000-0x000000000075B000-memory.dmp

Filesize
44KB

Download
memory/1564-29-0x0000000000750000-0x000000000075B000-memory.dmp

Filesize
44KB

Download
memory/1564-30-0x0000000000750000-0x000000000075B000-memory.dmp

Filesize
44KB

Download
memory/4508-22-0x0000000000400000-0x0000000002BA9000-memory.dmp

Filesize
39.7MB

Download
memory/4508-25-0x0000000000400000-0x0000000002BA9000-memory.dmp

Filesize
39.7MB

Download
memory/4508-21-0x0000000002C60000-0x0000000002D60000-memory.dmp

Filesize
1024KB

Download
memory/4508-27-0x0000000000400000-0x0000000002BA9000-memory.dmp

Filesize
39.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads