General
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Target
vcac.exe
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Size
41.6MB
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Sample
240115-jh96bachc6
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MD5
0fb2af6afdbdaf9206a5505264f0bf71
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SHA1
2a6a04694b83ac2d4d0c207951fc838072804b6a
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SHA256
65af8761b34d50026541f9607547c27fb40af28dabbe3f705fe69b551faf8496
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SHA512
f5edebf5a9d4d0d4e5c11285febace0c65cf998573267da4016af563920de76f970b41661e2888de06cae737b56bc31a19c7f588993fc3e16828cb99c96ef7d7
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SSDEEP
393216:Q/joxiIE7YoPQtsTTp7Lk3meBcGfd0vYM2krlFk1mX1eq44:Ijoe7rPQts/RLaT5F0vYvXFg
Behavioral task
behavioral1
Sample
vcac.exe
Resource
win10v2004-20231222-en
Malware Config
Extracted
quasar
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reconnect_delay
1
Extracted
quasar
1.4.1
user
192.168.0.13:3440
elpepemanca.ddns.net:3440
5950a87d-00d0-4fc0-a953-61143318e6d1
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encryption_key
1A866C514D7B8C5F02AAA72B847C1F305295B74C
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install_name
Windows.exe
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log_directory
Logs
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reconnect_delay
1
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startup_key
Discord.exe
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subdirectory
System
Targets
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Target
vcac.exe
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Size
41.6MB
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MD5
0fb2af6afdbdaf9206a5505264f0bf71
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SHA1
2a6a04694b83ac2d4d0c207951fc838072804b6a
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SHA256
65af8761b34d50026541f9607547c27fb40af28dabbe3f705fe69b551faf8496
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SHA512
f5edebf5a9d4d0d4e5c11285febace0c65cf998573267da4016af563920de76f970b41661e2888de06cae737b56bc31a19c7f588993fc3e16828cb99c96ef7d7
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SSDEEP
393216:Q/joxiIE7YoPQtsTTp7Lk3meBcGfd0vYM2krlFk1mX1eq44:Ijoe7rPQts/RLaT5F0vYvXFg
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Quasar payload
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Disables Task Manager via registry modification
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Drops file in Drivers directory
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Modifies Windows Firewall
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Possible privilege escalation attempt
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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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Executes dropped EXE
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Loads dropped DLL
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Modifies file permissions
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Accesses Microsoft Outlook profiles
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Accesses cryptocurrency files/wallets, possible credential harvesting
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Adds Run key to start application
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Drops desktop.ini file(s)
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Legitimate hosting services abused for malware hosting/C2
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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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Writes to the Master Boot Record (MBR)
Bootkits write to the MBR to gain persistence at a level below the operating system.
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Drops file in System32 directory
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MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Create or Modify System Process
1Windows Service
1Pre-OS Boot
1Bootkit
1Scheduled Task/Job
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Create or Modify System Process
1Windows Service
1Scheduled Task/Job
1