Malware Analysis Report

2024-10-23 19:11

Sample ID 240525-bvvx6ahf9y
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 family

Quasar payload

Quasar RAT

Drops file in Drivers directory

Executes dropped EXE

Drops file in System32 directory

Unsigned PE

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Uses Task Scheduler COM API

Creates scheduled task(s)

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-25 01:28

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 01:28

Reported

2024-05-25 01:29

Platform

win10v2004-20240426-en

Max time kernel

30s

Max time network

31s

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 opened for modification C:\Windows\system32\drivers\watchdog.exe C:\Windows\system32\drivers\watchdog.exe N/A
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

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

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

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 64.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
CA 142.115.43.39:8080 tcp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
NL 23.62.61.194:443 www.bing.com tcp
US 8.8.8.8:53 ipwho.is udp
DE 195.201.57.90:443 ipwho.is tcp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 39.43.115.142.in-addr.arpa udp
US 8.8.8.8:53 194.61.62.23.in-addr.arpa udp
US 8.8.8.8:53 90.57.201.195.in-addr.arpa udp
NL 23.62.61.194:443 www.bing.com tcp

Files

memory/2864-0-0x00007FF8C0683000-0x00007FF8C0685000-memory.dmp

memory/2864-1-0x0000000000750000-0x0000000000A74000-memory.dmp

memory/2864-2-0x00007FF8C0680000-0x00007FF8C1141000-memory.dmp

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

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

memory/2000-10-0x00007FF8C0680000-0x00007FF8C1141000-memory.dmp

memory/2864-9-0x00007FF8C0680000-0x00007FF8C1141000-memory.dmp

memory/2000-11-0x00007FF8C0680000-0x00007FF8C1141000-memory.dmp

memory/2000-12-0x0000000001AC0000-0x0000000001B10000-memory.dmp

memory/2000-13-0x000000001C5A0000-0x000000001C652000-memory.dmp

memory/2000-16-0x0000000003350000-0x0000000003362000-memory.dmp

memory/2000-17-0x000000001BDA0000-0x000000001BDDC000-memory.dmp

memory/2000-18-0x00007FF8C0680000-0x00007FF8C1141000-memory.dmp