saintbot | a4b705baac8bb2c0d2bc111eae9735fb8586d6d1dab050f3c89fb12589470969

General

Target

a4b705baac8bb2c0d2bc111eae9735fb8586d6d1dab050f3c89fb12589470969.exe
Size

29KB
MD5

d2efb0b8b82576016416aacbde6c3873
SHA1

19cac454edb76d7e879598d8c7e8e032f9d006d2
SHA256

a4b705baac8bb2c0d2bc111eae9735fb8586d6d1dab050f3c89fb12589470969
SHA512

e05172a8e7b0988ecfd85833177727262448bc9730dd0b33bae2b311d95336a97399824635f2ef4a6374fe04eb46f3739f4a6cce4a46b0c04df88a915d5b2c94
SSDEEP

768:HOMiz6RkiNkf8DnpdGMXMmCp3gzr9b3j3zIXwrn:smCiE89dGM6pwzFF

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 4 IoCs

resource	yara_rule
behavioral1/files/0x0029000000015c52-5.dat	family_saintbot
behavioral1/memory/2536-20-0x0000000000080000-0x000000000008C000-memory.dmp	family_saintbot
behavioral1/memory/2536-22-0x0000000000080000-0x000000000008C000-memory.dmp	family_saintbot
behavioral1/memory/2536-23-0x0000000000080000-0x000000000008C000-memory.dmp	family_saintbot

Deletes itself 1 IoCs

pid	Process
2956	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 Proofing (English) 2010.exe	a4b705baac8bb2c0d2bc111eae9735fb8586d6d1dab050f3c89fb12589470969.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Microsoft Office Proofing (English) 2010.exe	Microsoft Office Proofing (English) 2010.exe

Executes dropped EXE 1 IoCs

pid	Process
3036	Microsoft Office Proofing (English) 2010.exe

Loads dropped DLL 3 IoCs

pid	Process
1708	a4b705baac8bb2c0d2bc111eae9735fb8586d6d1dab050f3c89fb12589470969.exe
3036	Microsoft Office Proofing (English) 2010.exe
2536	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 opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum	Microsoft Office Proofing (English) 2010.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	Microsoft Office Proofing (English) 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	a4b705baac8bb2c0d2bc111eae9735fb8586d6d1dab050f3c89fb12589470969.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	a4b705baac8bb2c0d2bc111eae9735fb8586d6d1dab050f3c89fb12589470969.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 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

T1053

pid	Process
2420	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2524	PING.EXE

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 1708 wrote to memory of 3036	1708	a4b705baac8bb2c0d2bc111eae9735fb8586d6d1dab050f3c89fb12589470969.exe	28
PID 1708 wrote to memory of 3036	1708	a4b705baac8bb2c0d2bc111eae9735fb8586d6d1dab050f3c89fb12589470969.exe	28
PID 1708 wrote to memory of 3036	1708	a4b705baac8bb2c0d2bc111eae9735fb8586d6d1dab050f3c89fb12589470969.exe	28
PID 1708 wrote to memory of 3036	1708	a4b705baac8bb2c0d2bc111eae9735fb8586d6d1dab050f3c89fb12589470969.exe	28
PID 1708 wrote to memory of 2956	1708	a4b705baac8bb2c0d2bc111eae9735fb8586d6d1dab050f3c89fb12589470969.exe	29
PID 1708 wrote to memory of 2956	1708	a4b705baac8bb2c0d2bc111eae9735fb8586d6d1dab050f3c89fb12589470969.exe	29
PID 1708 wrote to memory of 2956	1708	a4b705baac8bb2c0d2bc111eae9735fb8586d6d1dab050f3c89fb12589470969.exe	29
PID 1708 wrote to memory of 2956	1708	a4b705baac8bb2c0d2bc111eae9735fb8586d6d1dab050f3c89fb12589470969.exe	29
PID 2956 wrote to memory of 2524	2956	cmd.exe	31
PID 2956 wrote to memory of 2524	2956	cmd.exe	31
PID 2956 wrote to memory of 2524	2956	cmd.exe	31
PID 2956 wrote to memory of 2524	2956	cmd.exe	31
PID 2956 wrote to memory of 2596	2956	cmd.exe	32
PID 2956 wrote to memory of 2596	2956	cmd.exe	32
PID 2956 wrote to memory of 2596	2956	cmd.exe	32
PID 2956 wrote to memory of 2596	2956	cmd.exe	32
PID 3036 wrote to memory of 2536	3036	Microsoft Office Proofing (English) 2010.exe	33
PID 3036 wrote to memory of 2536	3036	Microsoft Office Proofing (English) 2010.exe	33
PID 3036 wrote to memory of 2536	3036	Microsoft Office Proofing (English) 2010.exe	33
PID 3036 wrote to memory of 2536	3036	Microsoft Office Proofing (English) 2010.exe	33
PID 3036 wrote to memory of 2536	3036	Microsoft Office Proofing (English) 2010.exe	33
PID 2536 wrote to memory of 2420	2536	EhStorAuthn.exe	34
PID 2536 wrote to memory of 2420	2536	EhStorAuthn.exe	34
PID 2536 wrote to memory of 2420	2536	EhStorAuthn.exe	34
PID 2536 wrote to memory of 2420	2536	EhStorAuthn.exe	34

C:\Users\Admin\AppData\Local\Temp\a4b705baac8bb2c0d2bc111eae9735fb8586d6d1dab050f3c89fb12589470969.exe
"C:\Users\Admin\AppData\Local\Temp\a4b705baac8bb2c0d2bc111eae9735fb8586d6d1dab050f3c89fb12589470969.exe"
1⤵
- Drops startup file
- Loads dropped DLL
- Maps connected drives based on registry
- Suspicious use of WriteProcessMemory
PID:1708
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Microsoft Office Proofing (English) 2010.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Microsoft Office Proofing (English) 2010.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Loads dropped DLL
  - Maps connected drives based on registry
  - Suspicious use of WriteProcessMemory
  PID:3036
- - 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:2536
  - - 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:2420
- C:\Windows\SysWOW64\cmd.exe
  cmd /c C:\Users\Admin\AppData\Roaming\del.bat
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:2956
- - C:\Windows\SysWOW64\PING.EXE
    ping localhost -n 3
    3⤵
    - Runs ping.exe
    PID:2524
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c del "C:\Users\Admin\AppData\Roaming\del.bat"
    3⤵
    PID:2596

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

3

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
170B

MD5
7fe762e20099ac6263f73e9802371684

SHA1
caee8a6e500edaa047451fee1a748c0cb02a04da

SHA256
eb1049f972679d763edd03252cbad0cc801021ca5eabe897c9cfd0142fee26a4

SHA512
eac2d0e01c18e33e6405bd76518ac1357f1040300dd9b575f84193c66aa6f152f97d8adc0598f99e0c15e418007bba4dcc2a4c54ab8b96a7c530670f3e0e6b22

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

Filesize
29KB

MD5
d2efb0b8b82576016416aacbde6c3873

SHA1
19cac454edb76d7e879598d8c7e8e032f9d006d2

SHA256
a4b705baac8bb2c0d2bc111eae9735fb8586d6d1dab050f3c89fb12589470969

SHA512
e05172a8e7b0988ecfd85833177727262448bc9730dd0b33bae2b311d95336a97399824635f2ef4a6374fe04eb46f3739f4a6cce4a46b0c04df88a915d5b2c94

Download Submit
memory/2536-20-0x0000000000080000-0x000000000008C000-memory.dmp

Filesize
48KB

Download
memory/2536-22-0x0000000000080000-0x000000000008C000-memory.dmp

Filesize
48KB

Download
memory/2536-23-0x0000000000080000-0x000000000008C000-memory.dmp

Filesize
48KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads