General
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Target
https://github.com/enginestein/Virus-Collection
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Sample
240809-t2tmsawhlf
Static task
static1
URLScan task
urlscan1
Behavioral task
behavioral1
Sample
https://github.com/enginestein/Virus-Collection
Resource
win10-20240404-en
Malware Config
Extracted
crimsonrat
185.136.161.124
Targets
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Target
https://github.com/enginestein/Virus-Collection
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CrimsonRAT main payload
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Modifies WinLogon for persistence
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Suspicious use of NtCreateUserProcessOtherParentProcess
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Contacts a large (33792) amount of remote hosts
This may indicate a network scan to discover remotely running services.
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Creates a large amount of network flows
This may indicate a network scan to discover remotely running services.
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Downloads MZ/PE file
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Drops file in Drivers directory
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Modifies RDP port number used by Windows
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Sets service image path in registry
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Checks BIOS information in registry
BIOS information is often read in order to detect sandboxing environments.
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Credentials from Password Stores: Windows Credential Manager
Suspicious access to Credentials History.
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Event Triggered Execution: Component Object Model Hijacking
Adversaries may establish persistence by executing malicious content triggered by hijacked references to Component Object Model (COM) objects.
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Executes dropped EXE
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Impair Defenses: Safe Mode Boot
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Loads dropped DLL
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Obfuscated with Agile.Net obfuscator
Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.
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Adds Run key to start application
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Checks installed software on the system
Looks up Uninstall key entries in the registry to enumerate software on the system.
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Enumerates connected drives
Attempts to read the root path of hard drives other than the default C: drive.
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Legitimate hosting services abused for malware hosting/C2
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Boot or Logon Autostart Execution: Authentication Package
Suspicious Windows Authentication Registry Modification.
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Drops file in System32 directory
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MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
4Authentication Package
1Registry Run Keys / Startup Folder
2Winlogon Helper DLL
1Event Triggered Execution
1Component Object Model Hijacking
1Privilege Escalation
Boot or Logon Autostart Execution
4Authentication Package
1Registry Run Keys / Startup Folder
2Winlogon Helper DLL
1Event Triggered Execution
1Component Object Model Hijacking
1Defense Evasion
Impair Defenses
1Safe Mode Boot
1Modify Registry
5Subvert Trust Controls
1Install Root Certificate
1Credential Access
Credentials from Password Stores
1Windows Credential Manager
1Unsecured Credentials
1Credentials In Files
1