General
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Target
.
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Size
147KB
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Sample
240514-r7pjxabe3t
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MD5
ae16c0e6b3a18a28bf0a0974f1622568
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SHA1
106a2deebd06e2931be677b09d4f818d68c76d74
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SHA256
b941e34ee71c1eb4c2bb473adc99c62643c9be13bb6c67b0aa3308d61cbdbddd
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SHA512
407ac0936b5e5890c6e4f213e410cdb3fda8efec318128de1b3068b7626cd144ba27ee2ce7c381a6013760bd5964ee4c9e321251d50e6c3b94c7b24d80d63867
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SSDEEP
1536:olkud8TPV9vK4DNvGR4Dbll1qKf+30vD932Os4DjHhqiS:2kPT3V+CllQHKNHhqiS
Static task
static1
Behavioral task
behavioral1
Sample
.html
Resource
win10v2004-20240426-en
Malware Config
Extracted
crimsonrat
185.136.161.124
Targets
-
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Target
.
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Size
147KB
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MD5
ae16c0e6b3a18a28bf0a0974f1622568
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SHA1
106a2deebd06e2931be677b09d4f818d68c76d74
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SHA256
b941e34ee71c1eb4c2bb473adc99c62643c9be13bb6c67b0aa3308d61cbdbddd
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SHA512
407ac0936b5e5890c6e4f213e410cdb3fda8efec318128de1b3068b7626cd144ba27ee2ce7c381a6013760bd5964ee4c9e321251d50e6c3b94c7b24d80d63867
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SSDEEP
1536:olkud8TPV9vK4DNvGR4Dbll1qKf+30vD932Os4DjHhqiS:2kPT3V+CllQHKNHhqiS
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CrimsonRAT main payload
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Modifies WinLogon for persistence
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Modifies boot configuration data using bcdedit
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Downloads MZ/PE file
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Drops file in Drivers directory
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Modifies Installed Components in the registry
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Modifies Windows Firewall
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Office macro that triggers on suspicious action
Office document macro which triggers in special circumstances - often malicious.
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Sets service image path in registry
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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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Loads dropped DLL
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Modifies system executable filetype association
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Registers COM server for autorun
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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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Checks for any installed AV software in registry
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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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Drops desktop.ini file(s)
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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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Writes to the Master Boot Record (MBR)
Bootkits write to the MBR to gain persistence at a level below the operating system.
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Drops file in System32 directory
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MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
5Registry Run Keys / Startup Folder
4Winlogon Helper DLL
1Create or Modify System Process
1Windows Service
1Event Triggered Execution
1Change Default File Association
1Pre-OS Boot
1Bootkit
1Privilege Escalation
Boot or Logon Autostart Execution
5Registry Run Keys / Startup Folder
4Winlogon Helper DLL
1Create or Modify System Process
1Windows Service
1Event Triggered Execution
1Change Default File Association
1Defense Evasion
Hide Artifacts
2Hidden Files and Directories
2Impair Defenses
1Disable or Modify System Firewall
1Modify Registry
6Pre-OS Boot
1Bootkit
1Subvert Trust Controls
1Install Root Certificate
1