General
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Target
9f052ffa940763ede6b28dc1ebd4757e
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Size
654KB
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Sample
231222-qkpqqafgeq
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MD5
9f052ffa940763ede6b28dc1ebd4757e
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SHA1
0a4f3e7f6a573c0fe321ebf46aee344e08a28e25
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SHA256
c2361c29db867d86c9f6d361b3d3394d0d847775ebcb84422c095369ccde5acd
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SHA512
ebc566c0794b9edd8a7373636c065e3d67ee0156b33969a30950116b984cad81c352d96290cf4607fec7d3c2bf2e7a1d87f6231db6543a74df26da63ff5cbbbc
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SSDEEP
12288:c6bJhnrd2Qsm/+/dnGz7O0Y244sMYcoFMVyMg+Yy1Wcwemn58GVuv:ckJhngpn9kNsMwbMgkK58guv
Static task
static1
Behavioral task
behavioral1
Sample
9f052ffa940763ede6b28dc1ebd4757e.exe
Resource
win7-20231129-en
Malware Config
Extracted
quasar
2.1.0.0
SEP05
23.105.131.187:7812
VNM_MUTEX_ea14HLQ5adxyrFdD2X
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encryption_key
jUWfdDb1toPE0KAlGJWH
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install_name
Windows Security.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
Windows Update Service
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subdirectory
Windows Security Update
Targets
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Target
9f052ffa940763ede6b28dc1ebd4757e
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Size
654KB
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MD5
9f052ffa940763ede6b28dc1ebd4757e
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SHA1
0a4f3e7f6a573c0fe321ebf46aee344e08a28e25
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SHA256
c2361c29db867d86c9f6d361b3d3394d0d847775ebcb84422c095369ccde5acd
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SHA512
ebc566c0794b9edd8a7373636c065e3d67ee0156b33969a30950116b984cad81c352d96290cf4607fec7d3c2bf2e7a1d87f6231db6543a74df26da63ff5cbbbc
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SSDEEP
12288:c6bJhnrd2Qsm/+/dnGz7O0Y244sMYcoFMVyMg+Yy1Wcwemn58GVuv:ckJhngpn9kNsMwbMgkK58guv
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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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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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MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Create or Modify System Process
1Windows Service
1Scheduled Task/Job
1