General
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Target
http://tinyurl.com/4ypskr89
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Sample
250207-q6zg2ssqgv
Static task
static1
URLScan task
urlscan1
Behavioral task
behavioral1
Sample
http://tinyurl.com/4ypskr89
Resource
win11-20241007-en
Malware Config
Extracted
quasar
1.3.0.0
loomis5
jungsystem.zapto.org:4444
QSR_MUTEX_wEhsbPnhWYH1QahVH5
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encryption_key
mnw0PrBTAfzdFHZMkkIU
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install_name
svhostt.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
svhostt
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subdirectory
SubDir
Targets
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Target
http://tinyurl.com/4ypskr89
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Quasar family
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Quasar payload
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Uses browser remote debugging
Can be used control the browser and steal sensitive information such as credentials and session cookies.
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Executes dropped EXE
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Loads dropped DLL
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Adds Run key to start application
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Checks installed software on the system
Looks up Uninstall key entries in the registry to enumerate software on the system.
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Looks up external IP address via web service
Uses a legitimate IP lookup service to find the infected system's external IP.
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Checks system information in the registry
System information is often read in order to detect sandboxing environments.
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MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Modify Authentication Process
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Defense Evasion
Modify Authentication Process
1Modify Registry
2Subvert Trust Controls
1Install Root Certificate
1