saintbot | c66dae5fe5a7550df3c3cb51bdf3235e7c16c54c9fedb385af59887a48134d1f

Analysis

max time kernel
120s
max time network
125s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
10-04-2024 14:05

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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 8 IoCs

resource	yara_rule
behavioral1/memory/2168-2-0x0000000000340000-0x0000000000349000-memory.dmp	family_saintbot
behavioral1/memory/2168-3-0x0000000000400000-0x0000000002BA9000-memory.dmp	family_saintbot
behavioral1/memory/2168-23-0x0000000000400000-0x0000000002BA9000-memory.dmp	family_saintbot
behavioral1/memory/2900-31-0x0000000000400000-0x0000000002BA9000-memory.dmp	family_saintbot
behavioral1/memory/2900-34-0x0000000000400000-0x0000000002BA9000-memory.dmp	family_saintbot
behavioral1/memory/2560-36-0x00000000000D0000-0x00000000000DB000-memory.dmp	family_saintbot
behavioral1/memory/2560-38-0x00000000000D0000-0x00000000000DB000-memory.dmp	family_saintbot
behavioral1/memory/2560-39-0x00000000000D0000-0x00000000000DB000-memory.dmp	family_saintbot

Deletes itself 1 IoCs

pid	Process
2660	cmd.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Microsoft Office Proof (French) 2010.exe	Update-AV.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Microsoft Office Proof (French) 2010.exe	Microsoft Office Proof (French) 2010.exe

Executes dropped EXE 1 IoCs

pid	Process
2900	Microsoft Office Proof (French) 2010.exe

Loads dropped DLL 7 IoCs

pid	Process
2168	Update-AV.exe
2168	Update-AV.exe
2900	Microsoft Office Proof (French) 2010.exe
2900	Microsoft Office Proof (French) 2010.exe
2900	Microsoft Office Proof (French) 2010.exe
2900	Microsoft Office Proof (French) 2010.exe
2560	EhStorAuthn.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\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

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	Microsoft Office Proof (French) 2010.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
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	Microsoft Office Proof (French) 2010.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

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

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

pid	Process
392	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2592	PING.EXE

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2900	Microsoft Office Proof (French) 2010.exe

Suspicious use of WriteProcessMemory 43 IoCs

description	pid	Process	procid_target
PID 2168 wrote to memory of 2900	2168	Update-AV.exe	28
PID 2168 wrote to memory of 2900	2168	Update-AV.exe	28
PID 2168 wrote to memory of 2900	2168	Update-AV.exe	28
PID 2168 wrote to memory of 2900	2168	Update-AV.exe	28
PID 2168 wrote to memory of 2900	2168	Update-AV.exe	28
PID 2168 wrote to memory of 2900	2168	Update-AV.exe	28
PID 2168 wrote to memory of 2900	2168	Update-AV.exe	28
PID 2168 wrote to memory of 2660	2168	Update-AV.exe	29
PID 2168 wrote to memory of 2660	2168	Update-AV.exe	29
PID 2168 wrote to memory of 2660	2168	Update-AV.exe	29
PID 2168 wrote to memory of 2660	2168	Update-AV.exe	29
PID 2168 wrote to memory of 2660	2168	Update-AV.exe	29
PID 2168 wrote to memory of 2660	2168	Update-AV.exe	29
PID 2168 wrote to memory of 2660	2168	Update-AV.exe	29
PID 2660 wrote to memory of 2592	2660	cmd.exe	31
PID 2660 wrote to memory of 2592	2660	cmd.exe	31
PID 2660 wrote to memory of 2592	2660	cmd.exe	31
PID 2660 wrote to memory of 2592	2660	cmd.exe	31
PID 2660 wrote to memory of 2592	2660	cmd.exe	31
PID 2660 wrote to memory of 2592	2660	cmd.exe	31
PID 2660 wrote to memory of 2592	2660	cmd.exe	31
PID 2660 wrote to memory of 2120	2660	cmd.exe	32
PID 2660 wrote to memory of 2120	2660	cmd.exe	32
PID 2660 wrote to memory of 2120	2660	cmd.exe	32
PID 2660 wrote to memory of 2120	2660	cmd.exe	32
PID 2660 wrote to memory of 2120	2660	cmd.exe	32
PID 2660 wrote to memory of 2120	2660	cmd.exe	32
PID 2660 wrote to memory of 2120	2660	cmd.exe	32
PID 2900 wrote to memory of 2560	2900	Microsoft Office Proof (French) 2010.exe	33
PID 2900 wrote to memory of 2560	2900	Microsoft Office Proof (French) 2010.exe	33
PID 2900 wrote to memory of 2560	2900	Microsoft Office Proof (French) 2010.exe	33
PID 2900 wrote to memory of 2560	2900	Microsoft Office Proof (French) 2010.exe	33
PID 2900 wrote to memory of 2560	2900	Microsoft Office Proof (French) 2010.exe	33
PID 2900 wrote to memory of 2560	2900	Microsoft Office Proof (French) 2010.exe	33
PID 2900 wrote to memory of 2560	2900	Microsoft Office Proof (French) 2010.exe	33
PID 2900 wrote to memory of 2560	2900	Microsoft Office Proof (French) 2010.exe	33
PID 2560 wrote to memory of 392	2560	EhStorAuthn.exe	36
PID 2560 wrote to memory of 392	2560	EhStorAuthn.exe	36
PID 2560 wrote to memory of 392	2560	EhStorAuthn.exe	36
PID 2560 wrote to memory of 392	2560	EhStorAuthn.exe	36
PID 2560 wrote to memory of 392	2560	EhStorAuthn.exe	36
PID 2560 wrote to memory of 392	2560	EhStorAuthn.exe	36
PID 2560 wrote to memory of 392	2560	EhStorAuthn.exe	36

C:\Users\Admin\AppData\Local\Temp\Update-AV.exe
"C:\Users\Admin\AppData\Local\Temp\Update-AV.exe"
1⤵
- Drops startup file
- Loads dropped DLL
- Maps connected drives based on registry
- Suspicious use of WriteProcessMemory
PID:2168
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Microsoft Office Proof (French) 2010.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Microsoft Office Proof (French) 2010.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:2900
- - 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:2560
  - - 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:392
- C:\Windows\SysWOW64\cmd.exe
  cmd /c C:\Users\Admin\AppData\Roaming\del.bat
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:2660
- - C:\Windows\SysWOW64\PING.EXE
    ping localhost -n 3
    3⤵
    - Runs ping.exe
    PID:2592
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c del "C:\Users\Admin\AppData\Roaming\del.bat"
    3⤵
    PID:2120

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
1.2MB

MD5
d124f55b9393c976963407dff51ffa79

SHA1
2c7bbedd79791bfb866898c85b504186db610b5d

SHA256
ea1e16247c848c8c171c4cd1fa17bc5a018a1fcb0c0dac25009066b6667b8eef

SHA512
278fe3a4b1fbbe700e4f4483b610133e975e36e101455661d5197bd892a68839b9d555499040d200c92aefa9e3819380e395c0cd85d5fc845c6364d128a8cf06

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

Filesize
115B

MD5
46452764fc9de6ac55fde1e0b8c5c7e4

SHA1
5cad2dd721e69564b9651cad7c58c743d0e279f3

SHA256
2ab012ddb11a5934e3a0082f1fe59fb723898678b022447b3794692f72e95ebc

SHA512
38d57bec9d536c8d808b1d02c497a61815ad17d6dee9f9c12e21787230e657c64a0fb337cb6f0283c6bb9dc424f402d530ade3fcaa3164b0deae53dbf7ec7bf3

Download Submit
\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Microsoft Office Proof (French) 2010.exe

Filesize
223KB

MD5
893b17ed65ecffa8376063349f22d2bc

SHA1
50c556277899d6b9da5ec125c0a58650a14a08a7

SHA256
ebbf30e06de3a25f76cf43c72c521d14a27053e4d9be566b41f50c41bea3a7a9

SHA512
e61a215547991592a204868a979ec513198a6ba192a692a97ccba352c427dc1721a433c0aaaa98107f2d91ae5d2b0aad57ea9ea86ca48a0d61b8a48ecef6b787

Download Submit
memory/2168-2-0x0000000000340000-0x0000000000349000-memory.dmp

Filesize
36KB

Download
memory/2168-3-0x0000000000400000-0x0000000002BA9000-memory.dmp

Filesize
39.7MB

Download
memory/2168-23-0x0000000000400000-0x0000000002BA9000-memory.dmp

Filesize
39.7MB

Download
memory/2168-1-0x0000000002D40000-0x0000000002E40000-memory.dmp

Filesize
1024KB

Download
memory/2560-36-0x00000000000D0000-0x00000000000DB000-memory.dmp

Filesize
44KB

Download
memory/2560-39-0x00000000000D0000-0x00000000000DB000-memory.dmp

Filesize
44KB

Download
memory/2560-38-0x00000000000D0000-0x00000000000DB000-memory.dmp

Filesize
44KB

Download
memory/2900-30-0x0000000000240000-0x0000000000340000-memory.dmp

Filesize
1024KB

Download
memory/2900-34-0x0000000000400000-0x0000000002BA9000-memory.dmp

Filesize
39.7MB

Download
memory/2900-31-0x0000000000400000-0x0000000002BA9000-memory.dmp

Filesize
39.7MB

Download