General
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Target
4e07acab1178209379b2f3926e63da1a3002c9640667907db610216bd6e02e72
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Size
606KB
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Sample
221130-s7f37sfh6z
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MD5
c23863e0d7186334ca69903c6653ae06
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SHA1
6040256f4dabd5ee5dee6560e04c56f699532db6
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SHA256
4e07acab1178209379b2f3926e63da1a3002c9640667907db610216bd6e02e72
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SHA512
b9a7ffaa9a01a488efd29a9f9162c95a8c50f25d2183679f4783ce900319d81f4d375518667959b89bf8df002a869736a2c47bccae3b8ec5844f8f31c2fa7759
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SSDEEP
12288:HDNN+IaAFB0OLrdd5xSx8G3cK6TsrId6dd4WCWd9nNxtSR9UcN+Pjv:HDr+FqVvL5x4RcKYd83CWd9+UPv
Static task
static1
Behavioral task
behavioral1
Sample
4e07acab1178209379b2f3926e63da1a3002c9640667907db610216bd6e02e72.exe
Resource
win7-20221111-en
Malware Config
Extracted
quasar
2.1.0.0
hacked
23.105.131.178:7812
VNM_MUTEX_cFzA15c8rYLW8gVTCh
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encryption_key
VGvtyILUmmcgl2gY0sSm
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install_name
Windows Security Health Service.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
4e07acab1178209379b2f3926e63da1a3002c9640667907db610216bd6e02e72
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Size
606KB
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MD5
c23863e0d7186334ca69903c6653ae06
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SHA1
6040256f4dabd5ee5dee6560e04c56f699532db6
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SHA256
4e07acab1178209379b2f3926e63da1a3002c9640667907db610216bd6e02e72
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SHA512
b9a7ffaa9a01a488efd29a9f9162c95a8c50f25d2183679f4783ce900319d81f4d375518667959b89bf8df002a869736a2c47bccae3b8ec5844f8f31c2fa7759
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SSDEEP
12288:HDNN+IaAFB0OLrdd5xSx8G3cK6TsrId6dd4WCWd9nNxtSR9UcN+Pjv:HDr+FqVvL5x4RcKYd83CWd9+UPv
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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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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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