General
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Target
XClientB.exe
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Size
85KB
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Sample
241205-hkh9yatjcz
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MD5
a95c8560300ac51832c9baeca525230f
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SHA1
a04977f02be0dfd0a9af69a093f795468c1a7e30
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SHA256
1155ac9e41e46a3a870453570101bee1cfa164435847972c46ebfa70bc336a55
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SHA512
c53ea3ec545f4bde2828866fb96c61490c4a28bec0c01310a252f21908063f7a46b69f76f8327fa96234f04a9c661ad7f1fca3fc16f3b2bad68c0f64f96958be
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SSDEEP
1536:2inzt6mDiPKA7AIBdUZlouGQ68btAIzGNcrOlAy6TR7OybKExKN7:2ih7wX0vl68bOImcr9R7OaKES7
Malware Config
Extracted
xworm
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Install_directory
%Temp%
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install_file
svchost.exe
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pastebin_url
https://pastebin.com/raw/vJmE27fr
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telegram
https://api.telegram.org/bot7414557379:AAHJMIrSP_hoR0jelLf8igel3SZxGY860qU/sendMessage?chat_id=2076906822
Extracted
xworm
3.0
plus-loves.gl.at.ply.gg:59327
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Install_directory
%AppData%
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install_file
USB.exe
Extracted
gurcu
https://api.telegram.org/bot7414557379:AAHJMIrSP_hoR0jelLf8igel3SZxGY860qU/sendMessage?chat_id=2076906822
Targets
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Target
XClientB.exe
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Size
85KB
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MD5
a95c8560300ac51832c9baeca525230f
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SHA1
a04977f02be0dfd0a9af69a093f795468c1a7e30
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SHA256
1155ac9e41e46a3a870453570101bee1cfa164435847972c46ebfa70bc336a55
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SHA512
c53ea3ec545f4bde2828866fb96c61490c4a28bec0c01310a252f21908063f7a46b69f76f8327fa96234f04a9c661ad7f1fca3fc16f3b2bad68c0f64f96958be
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SSDEEP
1536:2inzt6mDiPKA7AIBdUZlouGQ68btAIzGNcrOlAy6TR7OybKExKN7:2ih7wX0vl68bOImcr9R7OaKES7
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DcRat
DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.
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Dcrat family
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Detect Xworm Payload
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Gurcu family
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Modifies WinLogon for persistence
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Process spawned unexpected child process
This typically indicates the parent process was compromised via an exploit or macro.
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Xworm family
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Command and Scripting Interpreter: PowerShell
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
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Downloads MZ/PE file
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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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Drops startup file
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Executes dropped EXE
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Adds Run key to start application
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Legitimate hosting services abused for malware hosting/C2
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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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Drops file in System32 directory
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MITRE ATT&CK Enterprise v15
Execution
Command and Scripting Interpreter
1PowerShell
1Scheduled Task/Job
1Scheduled Task
1Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Scheduled Task/Job
1Scheduled Task
1Credential Access
Credentials from Password Stores
1Credentials from Web Browsers
1Unsecured Credentials
1Credentials In Files
1