General
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Target
4be9a02e54e86920ed2bcaef3d28253ad0f4f3b005a14c656d74966589ca2039
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Size
648KB
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Sample
221130-xch2jahc6w
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MD5
763dd9b7f2a5183a1380bee36889f936
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SHA1
cdc7f9911a853973fc83d0e1a51ee5e82da347c9
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SHA256
4be9a02e54e86920ed2bcaef3d28253ad0f4f3b005a14c656d74966589ca2039
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SHA512
7ce621d758a7e12d026d669a5a9827e4dbec130baf05c51e8937227b9f35f5ef7ecfc4e60202f1e3d2f7aa67d665f612bfa0db92cd1ec3d2420a8207b152e37c
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SSDEEP
12288:Z8iNlD5ZS/1WEJOAqRSEM3Sy21LVbK89elrrJ56:vKIDAEQSy2TbKuKN
Static task
static1
Behavioral task
behavioral1
Sample
4be9a02e54e86920ed2bcaef3d28253ad0f4f3b005a14c656d74966589ca2039.exe
Resource
win7-20221111-en
Malware Config
Extracted
quasar
2.1.0.0
ajith
23.105.131.178:7812
VNM_MUTEX_NdVd2sPSSqFdo7I35g
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encryption_key
jyerms3KOWmt3C9DBFuq
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install_name
Windows Defender Security.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
Windows Update
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subdirectory
SubDir
Targets
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Target
4be9a02e54e86920ed2bcaef3d28253ad0f4f3b005a14c656d74966589ca2039
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Size
648KB
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MD5
763dd9b7f2a5183a1380bee36889f936
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SHA1
cdc7f9911a853973fc83d0e1a51ee5e82da347c9
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SHA256
4be9a02e54e86920ed2bcaef3d28253ad0f4f3b005a14c656d74966589ca2039
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SHA512
7ce621d758a7e12d026d669a5a9827e4dbec130baf05c51e8937227b9f35f5ef7ecfc4e60202f1e3d2f7aa67d665f612bfa0db92cd1ec3d2420a8207b152e37c
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SSDEEP
12288:Z8iNlD5ZS/1WEJOAqRSEM3Sy21LVbK89elrrJ56:vKIDAEQSy2TbKuKN
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Contains code to disable Windows Defender
A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.
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Quasar payload
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Executes dropped EXE
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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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Loads dropped DLL
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Adds Run key to start application
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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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Suspicious use of SetThreadContext
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