General
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Target
1dd754f56411c6768ac2ed928c2290271f24fb0758361afe398064896ed1a4bf
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Size
741KB
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Sample
230824-fejbmsab56
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MD5
2c5b7495fa40d1f393950d73ba52b4e7
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SHA1
4f6cbe160a02842b1822f7f2cac082910277613b
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SHA256
1dd754f56411c6768ac2ed928c2290271f24fb0758361afe398064896ed1a4bf
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SHA512
e8cfb5623d95b1ff010da2d209fd6f70da428bb1c03bf6bbabf2c9163e326387fafa3fd79ebdec27d6066e1b1710a802a5e39bb9ea1bb490b5a6bfca8eae2410
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SSDEEP
12288:aRZ+IoG/n9IQxW3OBsee2X+t4RbBy3vY65Ba/5ailWmpBlOIvhGCcSjopvtcWFQy:U2G/nvxW3Ww0tBy3vJ5MWuDTvhGCc/HN
Static task
static1
Behavioral task
behavioral1
Sample
1dd754f56411c6768ac2ed928c2290271f24fb0758361afe398064896ed1a4bf.exe
Resource
win7-20230712-en
Behavioral task
behavioral2
Sample
1dd754f56411c6768ac2ed928c2290271f24fb0758361afe398064896ed1a4bf.exe
Resource
win10-20230703-en
Malware Config
Extracted
quasar
1.3.0.0
NEW KLIENT
94.131.105.161:12344
QSR_MUTEX_UEgITWnMKnRP3EZFzK
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encryption_key
asrHpA9A9vqonUR95oQ6
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install_name
lient.exe
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log_directory
Lugs
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reconnect_delay
3000
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startup_key
itartup
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subdirectory
SubDir
Targets
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Target
1dd754f56411c6768ac2ed928c2290271f24fb0758361afe398064896ed1a4bf
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Size
741KB
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MD5
2c5b7495fa40d1f393950d73ba52b4e7
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SHA1
4f6cbe160a02842b1822f7f2cac082910277613b
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SHA256
1dd754f56411c6768ac2ed928c2290271f24fb0758361afe398064896ed1a4bf
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SHA512
e8cfb5623d95b1ff010da2d209fd6f70da428bb1c03bf6bbabf2c9163e326387fafa3fd79ebdec27d6066e1b1710a802a5e39bb9ea1bb490b5a6bfca8eae2410
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SSDEEP
12288:aRZ+IoG/n9IQxW3OBsee2X+t4RbBy3vY65Ba/5ailWmpBlOIvhGCcSjopvtcWFQy:U2G/nvxW3Ww0tBy3vJ5MWuDTvhGCc/HN
Score10/10-
Modifies WinLogon for persistence
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Quasar payload
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Modifies Windows Firewall
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Executes dropped EXE
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Loads dropped DLL
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Unexpected DNS network traffic destination
Network traffic to other servers than the configured DNS servers was detected on the DNS port.
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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
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Create or Modify System Process
1Windows Service
1Privilege Escalation
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Create or Modify System Process
1Windows Service
1