Malware Analysis Report

2024-10-23 19:09

Sample ID 240525-bwy17sab45
Target client.exe
SHA256 7869d203ee2ffc4d75d4d542cc2e3a970ca249d675e8bc7bd4f9cc85c80cab69
Tags
watchdog quasar spyware trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

7869d203ee2ffc4d75d4d542cc2e3a970ca249d675e8bc7bd4f9cc85c80cab69

Threat Level: Known bad

The file client.exe was found to be: Known bad.

Malicious Activity Summary

watchdog quasar spyware trojan

Quasar payload

Quasar family

Quasar RAT

Drops file in Drivers directory

Executes dropped EXE

Drops file in System32 directory

Enumerates physical storage devices

Unsigned PE

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Uses Task Scheduler COM API

Runs ping.exe

Creates scheduled task(s)

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-25 01:30

Signatures

Quasar family

quasar

Quasar payload

Description Indicator Process Target
N/A N/A N/A N/A

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-25 01:30

Reported

2024-05-25 02:00

Platform

win10-20240404-en

Max time kernel

406s

Max time network

1592s

Command Line

"C:\Users\Admin\AppData\Local\Temp\client.exe"

Signatures

Quasar RAT

trojan spyware quasar

Quasar payload

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A

Drops file in Drivers directory

Description Indicator Process Target
File created C:\Windows\system32\drivers\watchdog.exe C:\Users\Admin\AppData\Local\Temp\client.exe N/A
File opened for modification C:\Windows\system32\drivers\watchdog.exe C:\Users\Admin\AppData\Local\Temp\client.exe N/A
File opened for modification C:\Windows\system32\drivers\watchdog.exe C:\Windows\system32\drivers\watchdog.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Windows\system32\drivers\watchdog.exe N/A

Drops file in System32 directory

Description Indicator Process Target
File opened for modification C:\Windows\system32\drivers C:\Users\Admin\AppData\Local\Temp\client.exe N/A
File opened for modification C:\Windows\system32\drivers C:\Windows\system32\drivers\watchdog.exe N/A

Enumerates physical storage devices

Creates scheduled task(s)

persistence
Description Indicator Process Target
N/A N/A C:\Windows\SYSTEM32\schtasks.exe N/A
N/A N/A C:\Windows\SYSTEM32\schtasks.exe N/A

Runs ping.exe

Description Indicator Process Target
N/A N/A C:\Windows\system32\PING.EXE N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\client.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\system32\drivers\watchdog.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Windows\system32\drivers\watchdog.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4700 wrote to memory of 592 N/A C:\Users\Admin\AppData\Local\Temp\client.exe C:\Windows\SYSTEM32\schtasks.exe
PID 4700 wrote to memory of 592 N/A C:\Users\Admin\AppData\Local\Temp\client.exe C:\Windows\SYSTEM32\schtasks.exe
PID 4700 wrote to memory of 1084 N/A C:\Users\Admin\AppData\Local\Temp\client.exe C:\Windows\system32\drivers\watchdog.exe
PID 4700 wrote to memory of 1084 N/A C:\Users\Admin\AppData\Local\Temp\client.exe C:\Windows\system32\drivers\watchdog.exe
PID 1084 wrote to memory of 4260 N/A C:\Windows\system32\drivers\watchdog.exe C:\Windows\SYSTEM32\schtasks.exe
PID 1084 wrote to memory of 4260 N/A C:\Windows\system32\drivers\watchdog.exe C:\Windows\SYSTEM32\schtasks.exe
PID 1084 wrote to memory of 4156 N/A C:\Windows\system32\drivers\watchdog.exe C:\Windows\SYSTEM32\schtasks.exe
PID 1084 wrote to memory of 4156 N/A C:\Windows\system32\drivers\watchdog.exe C:\Windows\SYSTEM32\schtasks.exe
PID 1084 wrote to memory of 1896 N/A C:\Windows\system32\drivers\watchdog.exe C:\Windows\system32\cmd.exe
PID 1084 wrote to memory of 1896 N/A C:\Windows\system32\drivers\watchdog.exe C:\Windows\system32\cmd.exe
PID 1896 wrote to memory of 4420 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\chcp.com
PID 1896 wrote to memory of 4420 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\chcp.com
PID 1896 wrote to memory of 4480 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\PING.EXE
PID 1896 wrote to memory of 4480 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\PING.EXE

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\client.exe

"C:\Users\Admin\AppData\Local\Temp\client.exe"

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "watchdog" /sc ONLOGON /tr "C:\Windows\system32\drivers\watchdog.exe" /rl HIGHEST /f

C:\Windows\system32\drivers\watchdog.exe

"C:\Windows\system32\drivers\watchdog.exe"

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "watchdog" /sc ONLOGON /tr "C:\Windows\system32\drivers\watchdog.exe" /rl HIGHEST /f

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /delete /tn "watchdog" /f

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\DgaxBjQgXIR0.bat" "

C:\Windows\system32\chcp.com

chcp 65001

C:\Windows\system32\PING.EXE

ping -n 10 localhost

Network

Country Destination Domain Proto
CA 142.115.43.39:8080 tcp
US 8.8.8.8:53 ipwho.is udp
DE 195.201.57.90:443 ipwho.is tcp
US 8.8.8.8:53 39.43.115.142.in-addr.arpa udp
US 8.8.8.8:53 82.90.14.23.in-addr.arpa udp
US 8.8.8.8:53 90.57.201.195.in-addr.arpa udp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 211.143.182.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 91.90.14.23.in-addr.arpa udp

Files

memory/4700-0-0x00007FFDC0CF3000-0x00007FFDC0CF4000-memory.dmp

memory/4700-1-0x0000000000290000-0x00000000005B4000-memory.dmp

memory/4700-2-0x00007FFDC0CF0000-0x00007FFDC16DC000-memory.dmp

C:\Windows\System32\drivers\watchdog.exe

MD5 4dfff8420e0d2f3a0e30a3ae8e005830
SHA1 379546834fa347bdcf6a4aa1a9d956b540d33b55
SHA256 7869d203ee2ffc4d75d4d542cc2e3a970ca249d675e8bc7bd4f9cc85c80cab69
SHA512 6f4de859019a9ed236f6ddcbb03737c9e643368ae74fea3b36f7254a1b691448fb5f5befe4997554ed96f099309908f6b0a42d46161d3727d07620b1ecca94cb

memory/4700-9-0x00007FFDC0CF0000-0x00007FFDC16DC000-memory.dmp

memory/1084-10-0x00007FFDC0CF0000-0x00007FFDC16DC000-memory.dmp

memory/1084-11-0x00007FFDC0CF0000-0x00007FFDC16DC000-memory.dmp

memory/1084-12-0x000000001B760000-0x000000001B7B0000-memory.dmp

memory/1084-13-0x000000001B870000-0x000000001B922000-memory.dmp

memory/1084-16-0x000000001B810000-0x000000001B822000-memory.dmp

memory/1084-17-0x000000001BF60000-0x000000001BF9E000-memory.dmp

memory/1084-18-0x000000001C7D0000-0x000000001CCF6000-memory.dmp

memory/1084-20-0x00007FFDC0CF0000-0x00007FFDC16DC000-memory.dmp

memory/1084-29-0x00007FFDC0CF0000-0x00007FFDC16DC000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\DgaxBjQgXIR0.bat

MD5 f4e2e62945b1d8cd38c15e9ddca594a4
SHA1 48ea069f686c869bb1ea53ba8bfd6eb344d183b1
SHA256 bc4932e210ebd8a2f3745339933ac68330ccdc2eeb24ad2dba37aadf7da9afae
SHA512 f163ba72e6c6fa461ef0f4e77324aa5f876967ec05e41bebd18704defaeeb2043c844a64006840f47b4626eefca926be27f2b38757656bb066afdc5aa914fbdf