Malware Analysis Report

2024-10-23 19:09

Sample ID 240525-brtwpahh36
Target client.exe
SHA256 f6fe8fbbafb40ded2572c45d74740d6aa5a7bd6149e2ec2ddedf9030b7411228
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

f6fe8fbbafb40ded2572c45d74740d6aa5a7bd6149e2ec2ddedf9030b7411228

Threat Level: Known bad

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

Malicious Activity Summary

watchdog quasar spyware trojan

Quasar RAT

Quasar family

Quasar payload

Drops file in Drivers directory

Executes dropped EXE

Drops file in System32 directory

Unsigned PE

Creates scheduled task(s)

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-25 01:23

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 01:23

Reported

2024-05-25 01:53

Platform

win11-20240426-en

Max time kernel

1794s

Max time network

1799s

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

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
CA 142.115.43.143:8080 tcp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
NL 23.62.61.194:443 www.bing.com tcp
US 8.8.8.8:53 69.31.126.40.in-addr.arpa udp
CA 142.115.43.143:8080 tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp
CA 142.115.43.143:8080 tcp

Files

memory/3312-0-0x00007FFAF1663000-0x00007FFAF1665000-memory.dmp

memory/3312-1-0x0000000000910000-0x0000000000C34000-memory.dmp

memory/3312-2-0x00007FFAF1660000-0x00007FFAF2122000-memory.dmp

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

MD5 3923567323be44b3a3955f8b69585396
SHA1 c2db51125c1d664ac02e9ea28fbe4fb6fc47e59a
SHA256 f6fe8fbbafb40ded2572c45d74740d6aa5a7bd6149e2ec2ddedf9030b7411228
SHA512 5d410bfeb594674195c46dbd228c4967e5df07bd3b6fe3d16a8be48690d58354d4448e35b9fc7a99bca720ed104d6e24be8fd8d8abc31392ccd55a556da14dca

memory/3268-9-0x00007FFAF1660000-0x00007FFAF2122000-memory.dmp

memory/3312-10-0x00007FFAF1660000-0x00007FFAF2122000-memory.dmp

memory/3268-11-0x00007FFAF1660000-0x00007FFAF2122000-memory.dmp

memory/3268-12-0x000000001BA00000-0x000000001BA50000-memory.dmp

memory/3268-13-0x000000001BB10000-0x000000001BBC2000-memory.dmp

memory/3268-14-0x00007FFAF1660000-0x00007FFAF2122000-memory.dmp