General
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Target
https://gofile.io/d/B2iUtm
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Sample
241104-alp5waygjl
Static task
static1
URLScan task
urlscan1
Behavioral task
behavioral1
Sample
https://gofile.io/d/B2iUtm
Resource
win7-20240729-en
Behavioral task
behavioral2
Sample
https://gofile.io/d/B2iUtm
Resource
win10v2004-20241007-en
Malware Config
Extracted
quasar
1.3.0.0
Office04
192.168.1.11:4782
QSR_MUTEX_f39lWqYnYtP5YngtM5
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encryption_key
c5q7P5jsfrwN6nB5c3mG
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install_name
SystemUpdate.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
WindowsUpdate
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subdirectory
SubDir
Targets
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Target
https://gofile.io/d/B2iUtm
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Quasar family
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Quasar payload
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Command and Scripting Interpreter: PowerShell
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
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Downloads MZ/PE file
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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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Drops startup file
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Event Triggered Execution: Component Object Model Hijacking
Adversaries may establish persistence by executing malicious content triggered by hijacked references to Component Object Model (COM) objects.
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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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Drops desktop.ini file(s)
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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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MITRE ATT&CK Enterprise v15
Execution
Command and Scripting Interpreter
1PowerShell
1Scheduled Task/Job
1Scheduled Task
1Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Event Triggered Execution
1Component Object Model Hijacking
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Event Triggered Execution
1Component Object Model Hijacking
1Scheduled Task/Job
1Scheduled Task
1