Malware Analysis Report

2025-04-14 04:54

Sample ID 241213-lyx7ssvkcw
Target Registry.exe
SHA256 bf901de5b54a593b3d90a2bcfdf0a963ba52381f542bf33299bdfcc3b5b2afff
Tags
office04 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: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

bf901de5b54a593b3d90a2bcfdf0a963ba52381f542bf33299bdfcc3b5b2afff

Threat Level: Known bad

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

Malicious Activity Summary

office04 quasar spyware trojan

Quasar payload

Quasar RAT

Quasar family

Executes dropped EXE

Unsigned PE

Enumerates physical storage devices

Scheduled Task/Job: Scheduled Task

Suspicious use of AdjustPrivilegeToken

Suspicious use of FindShellTrayWindow

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

Suspicious use of SendNotifyMessage

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-12-13 09:57

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

2024-12-13 09:57

Reported

2024-12-13 09:59

Platform

win7-20240903-en

Max time kernel

126s

Max time network

137s

Command Line

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

Signatures

Quasar RAT

trojan spyware quasar

Quasar family

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:\Users\Admin\AppData\Roaming\SubDir\Runtime Broker.exe N/A

Enumerates physical storage devices

Scheduled Task/Job: Scheduled Task

persistence execution
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\Registry.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\SubDir\Runtime Broker.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\SubDir\Runtime Broker.exe N/A

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\SubDir\Runtime Broker.exe N/A

Uses Task Scheduler COM API

persistence

Processes

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

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

C:\Windows\system32\schtasks.exe

"schtasks" /create /tn "Runtime Broker" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Runtime Broker.exe" /rl HIGHEST /f

C:\Users\Admin\AppData\Roaming\SubDir\Runtime Broker.exe

"C:\Users\Admin\AppData\Roaming\SubDir\Runtime Broker.exe"

C:\Windows\system32\schtasks.exe

"schtasks" /create /tn "Runtime Broker" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Runtime Broker.exe" /rl HIGHEST /f

Network

Country Destination Domain Proto
VN 14.243.221.170:2654 tcp
VN 14.243.221.170:2654 tcp
VN 14.243.221.170:2654 tcp
VN 14.243.221.170:2654 tcp
VN 14.243.221.170:2654 tcp
VN 14.243.221.170:2654 tcp

Files

memory/2748-0-0x000007FEF6033000-0x000007FEF6034000-memory.dmp

memory/2748-1-0x00000000012A0000-0x00000000015C4000-memory.dmp

memory/2748-2-0x000007FEF6030000-0x000007FEF6A1C000-memory.dmp

C:\Users\Admin\AppData\Roaming\SubDir\Runtime Broker.exe

MD5 6f154cc5f643cc4228adf17d1ff32d42
SHA1 10efef62da024189beb4cd451d3429439729675b
SHA256 bf901de5b54a593b3d90a2bcfdf0a963ba52381f542bf33299bdfcc3b5b2afff
SHA512 050fc8a9a852d87f22296be8fe4067d6fabefc2dec408da3684a0deb31983617e8ba42494d3dbe75207d0810dec7ae1238b17b23ed71668cc099a31e1f6539d1

memory/2956-8-0x0000000001200000-0x0000000001524000-memory.dmp

memory/2748-7-0x000007FEF6030000-0x000007FEF6A1C000-memory.dmp

memory/2956-10-0x000007FEF6030000-0x000007FEF6A1C000-memory.dmp

memory/2956-9-0x000007FEF6030000-0x000007FEF6A1C000-memory.dmp

memory/2956-11-0x000007FEF6030000-0x000007FEF6A1C000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-12-13 09:57

Reported

2024-12-13 09:59

Platform

win10v2004-20241007-en

Max time kernel

126s

Max time network

147s

Command Line

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

Signatures

Quasar RAT

trojan spyware quasar

Quasar family

quasar

Quasar payload

Description Indicator Process Target
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:\Users\Admin\AppData\Roaming\SubDir\Runtime Broker.exe N/A

Enumerates physical storage devices

Scheduled Task/Job: Scheduled Task

persistence execution
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\Registry.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\SubDir\Runtime Broker.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\SubDir\Runtime Broker.exe N/A

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\SubDir\Runtime Broker.exe N/A

Uses Task Scheduler COM API

persistence

Processes

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

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

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "Runtime Broker" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Runtime Broker.exe" /rl HIGHEST /f

C:\Users\Admin\AppData\Roaming\SubDir\Runtime Broker.exe

"C:\Users\Admin\AppData\Roaming\SubDir\Runtime Broker.exe"

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "Runtime Broker" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Runtime Broker.exe" /rl HIGHEST /f

Network

Country Destination Domain Proto
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
VN 14.243.221.170:2654 tcp
US 8.8.8.8:53 133.130.81.91.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 22.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
VN 14.243.221.170:2654 tcp
US 8.8.8.8:53 200.163.202.172.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 134.130.81.91.in-addr.arpa udp
VN 14.243.221.170:2654 tcp
VN 14.243.221.170:2654 tcp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp
VN 14.243.221.170:2654 tcp
VN 14.243.221.170:2654 tcp

Files

memory/4964-0-0x00007FFA38393000-0x00007FFA38395000-memory.dmp

memory/4964-1-0x0000000000CF0000-0x0000000001014000-memory.dmp

memory/4964-2-0x00007FFA38390000-0x00007FFA38E51000-memory.dmp

C:\Users\Admin\AppData\Roaming\SubDir\Runtime Broker.exe

MD5 6f154cc5f643cc4228adf17d1ff32d42
SHA1 10efef62da024189beb4cd451d3429439729675b
SHA256 bf901de5b54a593b3d90a2bcfdf0a963ba52381f542bf33299bdfcc3b5b2afff
SHA512 050fc8a9a852d87f22296be8fe4067d6fabefc2dec408da3684a0deb31983617e8ba42494d3dbe75207d0810dec7ae1238b17b23ed71668cc099a31e1f6539d1

memory/4964-8-0x00007FFA38390000-0x00007FFA38E51000-memory.dmp

memory/4256-9-0x00007FFA38390000-0x00007FFA38E51000-memory.dmp

memory/4256-10-0x00007FFA38390000-0x00007FFA38E51000-memory.dmp

memory/4256-11-0x000000001C560000-0x000000001C5B0000-memory.dmp

memory/4256-12-0x000000001C670000-0x000000001C722000-memory.dmp

memory/4256-13-0x00007FFA38390000-0x00007FFA38E51000-memory.dmp