General
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Target
4f99850bfde0c6703b4f2c8420b9dc8f_JaffaCakes118
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Size
680KB
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Sample
240716-xjtrlsybjb
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MD5
4f99850bfde0c6703b4f2c8420b9dc8f
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SHA1
c60d92f1e0529b2e770858e180906bf9fae631a9
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SHA256
94dc30c7b03813bb558ec30577f0761dc2bfcedd3aa0dea665a88ab84f08aa33
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SHA512
0d311592bc2dc5ececb3afae6dee5842b9f6a37710d29f5f1a3fe8a27d3e43a625a57039bef92044744d8a0225c52260cc9757b148deb9e0c4e72781e1a89aec
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SSDEEP
12288:75393whFOBbQVXQsI6f9fqAPzzEeEZchCBywRiaxJDj8DkIonQmP0Ove/diuHc:753uhF7VAibzzEe9wRiaLSkI8QhOQ18
Static task
static1
Behavioral task
behavioral1
Sample
4f99850bfde0c6703b4f2c8420b9dc8f_JaffaCakes118.exe
Resource
win7-20240704-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
4f99850bfde0c6703b4f2c8420b9dc8f_JaffaCakes118
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Size
680KB
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MD5
4f99850bfde0c6703b4f2c8420b9dc8f
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SHA1
c60d92f1e0529b2e770858e180906bf9fae631a9
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SHA256
94dc30c7b03813bb558ec30577f0761dc2bfcedd3aa0dea665a88ab84f08aa33
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SHA512
0d311592bc2dc5ececb3afae6dee5842b9f6a37710d29f5f1a3fe8a27d3e43a625a57039bef92044744d8a0225c52260cc9757b148deb9e0c4e72781e1a89aec
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SSDEEP
12288:75393whFOBbQVXQsI6f9fqAPzzEeEZchCBywRiaxJDj8DkIonQmP0Ove/diuHc:753uhF7VAibzzEe9wRiaLSkI8QhOQ18
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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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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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Deletes itself
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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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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
1Scheduled Task
1