Malware Analysis Report

2025-04-14 05:07

Sample ID 230117-vn4q9sfg6s
Target svchost.exe
SHA256 1fc3469378a92b852065e463b99e5b0cab8d8ba9d2fde12c05baa1454673b616
Tags
office04 quasar spyware trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

1fc3469378a92b852065e463b99e5b0cab8d8ba9d2fde12c05baa1454673b616

Threat Level: Known bad

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

Malicious Activity Summary

office04 quasar spyware trojan

Quasar family

Quasar RAT

Quasar payload

Executes dropped EXE

Loads dropped DLL

Looks up external IP address via web service

Drops file in System32 directory

Creates scheduled task(s)

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Suspicious use of SetWindowsHookEx

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-01-17 17:09

Signatures

Quasar family

quasar

Quasar payload

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

Analysis: behavioral1

Detonation Overview

Submitted

2023-01-17 17:09

Reported

2023-01-17 17:11

Platform

win7-20221111-en

Max time kernel

141s

Max time network

148s

Command Line

"C:\Users\Admin\AppData\Local\Temp\svchost.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
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\SubDir\svchost.exe N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\svchost.exe N/A

Looks up external IP address via web service

Description Indicator Process Target
N/A ip-api.com N/A N/A

Drops file in System32 directory

Description Indicator Process Target
File opened for modification C:\Windows\SysWOW64\SubDir C:\Windows\SysWOW64\SubDir\svchost.exe N/A
File created C:\Windows\SysWOW64\SubDir\svchost.exe C:\Users\Admin\AppData\Local\Temp\svchost.exe N/A
File opened for modification C:\Windows\SysWOW64\SubDir\svchost.exe C:\Users\Admin\AppData\Local\Temp\svchost.exe N/A
File opened for modification C:\Windows\SysWOW64\SubDir\svchost.exe C:\Windows\SysWOW64\SubDir\svchost.exe N/A

Creates scheduled task(s)

persistence
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\schtasks.exe N/A
N/A N/A C:\Windows\SysWOW64\schtasks.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\svchost.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\SubDir\svchost.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\SubDir\svchost.exe N/A

Processes

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

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

C:\Windows\SysWOW64\schtasks.exe

"schtasks" /create /tn "svchost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\svchost.exe" /rl HIGHEST /f

C:\Windows\SysWOW64\SubDir\svchost.exe

"C:\Windows\SysWOW64\SubDir\svchost.exe"

C:\Windows\SysWOW64\schtasks.exe

"schtasks" /create /tn "svchost" /sc ONLOGON /tr "C:\Windows\SysWOW64\SubDir\svchost.exe" /rl HIGHEST /f

Network

Country Destination Domain Proto
N/A 8.8.8.8:53 ip-api.com udp
N/A 208.95.112.1:80 ip-api.com tcp
N/A 208.95.112.1:80 ip-api.com tcp
N/A 188.119.45.143:9896 tcp
N/A 8.8.8.8:53 microsoftstolewindows.duckdns.org udp
N/A 212.154.86.214:9896 microsoftstolewindows.duckdns.org tcp
N/A 192.168.1.52:9896 tcp
N/A 188.119.45.143:9896 tcp
N/A 8.8.8.8:53 microsoftstolewindows.duckdns.org udp
N/A 212.154.86.214:9896 microsoftstolewindows.duckdns.org tcp
N/A 192.168.1.52:9896 tcp
N/A 188.119.45.143:9896 tcp
N/A 8.8.8.8:53 microsoftstolewindows.duckdns.org udp
N/A 212.154.86.214:9896 microsoftstolewindows.duckdns.org tcp

Files

memory/1264-54-0x0000000000CF0000-0x0000000000D4E000-memory.dmp

memory/1264-55-0x0000000075A31000-0x0000000075A33000-memory.dmp

memory/584-56-0x0000000000000000-mapping.dmp

\Windows\SysWOW64\SubDir\svchost.exe

MD5 99a2e914bbf4c8410c8c57bf24901919
SHA1 8af5cc6ebba0bd365fa8accd92610c71380d93f7
SHA256 1fc3469378a92b852065e463b99e5b0cab8d8ba9d2fde12c05baa1454673b616
SHA512 f3b667faecf82c2b0528be0febcb9d2c21f54725fc2b9be03616c8398d849664571f04dda5364af6dc63d3351f51f5906f9f31fcec8e4b99ea18189d55d824cc

memory/540-58-0x0000000000000000-mapping.dmp

C:\Windows\SysWOW64\SubDir\svchost.exe

MD5 99a2e914bbf4c8410c8c57bf24901919
SHA1 8af5cc6ebba0bd365fa8accd92610c71380d93f7
SHA256 1fc3469378a92b852065e463b99e5b0cab8d8ba9d2fde12c05baa1454673b616
SHA512 f3b667faecf82c2b0528be0febcb9d2c21f54725fc2b9be03616c8398d849664571f04dda5364af6dc63d3351f51f5906f9f31fcec8e4b99ea18189d55d824cc

C:\Windows\SysWOW64\SubDir\svchost.exe

MD5 99a2e914bbf4c8410c8c57bf24901919
SHA1 8af5cc6ebba0bd365fa8accd92610c71380d93f7
SHA256 1fc3469378a92b852065e463b99e5b0cab8d8ba9d2fde12c05baa1454673b616
SHA512 f3b667faecf82c2b0528be0febcb9d2c21f54725fc2b9be03616c8398d849664571f04dda5364af6dc63d3351f51f5906f9f31fcec8e4b99ea18189d55d824cc

memory/540-61-0x00000000012A0000-0x00000000012FE000-memory.dmp

memory/1728-63-0x0000000000000000-mapping.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-01-17 17:09

Reported

2023-01-17 17:11

Platform

win10v2004-20220812-en

Max time kernel

133s

Max time network

152s

Command Line

"C:\Users\Admin\AppData\Local\Temp\svchost.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
N/A N/A N/A N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\SubDir\svchost.exe N/A

Looks up external IP address via web service

Description Indicator Process Target
N/A ip-api.com N/A N/A

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\SubDir\svchost.exe C:\Users\Admin\AppData\Local\Temp\svchost.exe N/A
File opened for modification C:\Windows\SysWOW64\SubDir\svchost.exe C:\Users\Admin\AppData\Local\Temp\svchost.exe N/A
File opened for modification C:\Windows\SysWOW64\SubDir\svchost.exe C:\Windows\SysWOW64\SubDir\svchost.exe N/A
File opened for modification C:\Windows\SysWOW64\SubDir C:\Windows\SysWOW64\SubDir\svchost.exe N/A

Creates scheduled task(s)

persistence
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\schtasks.exe N/A
N/A N/A C:\Windows\SysWOW64\schtasks.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\svchost.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\SubDir\svchost.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\SubDir\svchost.exe N/A

Processes

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

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

C:\Windows\SysWOW64\schtasks.exe

"schtasks" /create /tn "svchost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\svchost.exe" /rl HIGHEST /f

C:\Windows\SysWOW64\SubDir\svchost.exe

"C:\Windows\SysWOW64\SubDir\svchost.exe"

C:\Windows\SysWOW64\schtasks.exe

"schtasks" /create /tn "svchost" /sc ONLOGON /tr "C:\Windows\SysWOW64\SubDir\svchost.exe" /rl HIGHEST /f

Network

Country Destination Domain Proto
N/A 8.8.8.8:53 ip-api.com udp
N/A 208.95.112.1:80 ip-api.com tcp
N/A 208.95.112.1:80 ip-api.com tcp
N/A 188.119.45.143:9896 tcp
N/A 8.8.8.8:53 microsoftstolewindows.duckdns.org udp
N/A 212.154.86.214:9896 microsoftstolewindows.duckdns.org tcp
N/A 13.69.239.74:443 tcp
N/A 93.184.220.29:80 tcp
N/A 93.184.220.29:80 tcp
N/A 8.247.211.254:80 tcp
N/A 8.247.211.254:80 tcp
N/A 209.197.3.8:80 tcp
N/A 192.168.1.52:9896 tcp
N/A 8.247.211.254:80 tcp
N/A 8.247.211.254:80 tcp
N/A 188.119.45.143:9896 tcp
N/A 212.154.86.214:9896 microsoftstolewindows.duckdns.org tcp
N/A 192.168.1.52:9896 tcp
N/A 188.119.45.143:9896 tcp
N/A 8.8.8.8:53 microsoftstolewindows.duckdns.org udp
N/A 212.154.86.214:9896 microsoftstolewindows.duckdns.org tcp

Files

memory/1684-132-0x00000000004D0000-0x000000000052E000-memory.dmp

memory/1684-133-0x0000000005BB0000-0x0000000006154000-memory.dmp

memory/1684-134-0x0000000005600000-0x0000000005692000-memory.dmp

memory/1684-135-0x00000000056A0000-0x0000000005706000-memory.dmp

memory/1684-136-0x0000000005B40000-0x0000000005B52000-memory.dmp

memory/1684-137-0x0000000006920000-0x000000000695C000-memory.dmp

memory/4892-138-0x0000000000000000-mapping.dmp

memory/5024-139-0x0000000000000000-mapping.dmp

C:\Windows\SysWOW64\SubDir\svchost.exe

MD5 99a2e914bbf4c8410c8c57bf24901919
SHA1 8af5cc6ebba0bd365fa8accd92610c71380d93f7
SHA256 1fc3469378a92b852065e463b99e5b0cab8d8ba9d2fde12c05baa1454673b616
SHA512 f3b667faecf82c2b0528be0febcb9d2c21f54725fc2b9be03616c8398d849664571f04dda5364af6dc63d3351f51f5906f9f31fcec8e4b99ea18189d55d824cc

C:\Windows\SysWOW64\SubDir\svchost.exe

MD5 99a2e914bbf4c8410c8c57bf24901919
SHA1 8af5cc6ebba0bd365fa8accd92610c71380d93f7
SHA256 1fc3469378a92b852065e463b99e5b0cab8d8ba9d2fde12c05baa1454673b616
SHA512 f3b667faecf82c2b0528be0febcb9d2c21f54725fc2b9be03616c8398d849664571f04dda5364af6dc63d3351f51f5906f9f31fcec8e4b99ea18189d55d824cc

memory/1476-142-0x0000000000000000-mapping.dmp

memory/5024-143-0x0000000006A50000-0x0000000006A5A000-memory.dmp