General
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Target
lol.exe
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Size
9.2MB
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Sample
240523-rzn86see6x
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MD5
93296816398ac7ff5fc9d91f8d2765b2
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SHA1
f5817b3d34c22d0f847028797db143d75f592536
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SHA256
1d84ff128228995c275b3e6c05cd19e4e46fcb7574cbd7fb3934abb3df3d1129
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SHA512
fef4af08ce771ffad5eb500813052b93ff3c4c71711c03e9c9314fd16212b89fa14f77ca9f648c57617600c4fb932ebb7dd5bf97685e480106f79c98ac15885c
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SSDEEP
196608:tbVYKe7PFQhn5EQ9hNQAYzA5k6cTWDn7JKObS09BBI3:pzu25EWheYkv8LlB23
Malware Config
Targets
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Target
lol.exe
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Size
9.2MB
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MD5
93296816398ac7ff5fc9d91f8d2765b2
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SHA1
f5817b3d34c22d0f847028797db143d75f592536
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SHA256
1d84ff128228995c275b3e6c05cd19e4e46fcb7574cbd7fb3934abb3df3d1129
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SHA512
fef4af08ce771ffad5eb500813052b93ff3c4c71711c03e9c9314fd16212b89fa14f77ca9f648c57617600c4fb932ebb7dd5bf97685e480106f79c98ac15885c
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SSDEEP
196608:tbVYKe7PFQhn5EQ9hNQAYzA5k6cTWDn7JKObS09BBI3:pzu25EWheYkv8LlB23
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Detect Umbral payload
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Modifies WinLogon for persistence
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Modifies visibility of file extensions in Explorer
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Modifies visiblity of hidden/system files in Explorer
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Disables RegEdit via registry modification
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Drops file in Drivers directory
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Manipulates Digital Signatures
Attackers can apply techniques such as modifying certain DLL exports to make their binary seem valid.
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.NET Reactor proctector
Detects an executable protected by an unregistered version of Eziriz's .NET Reactor.
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Executes dropped EXE
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Modifies file permissions
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Adds Run key to start application
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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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Modifies WinLogon
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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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AutoIT Executable
AutoIT scripts compiled to PE executables.
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Drops file in System32 directory
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MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
3Registry Run Keys / Startup Folder
1Winlogon Helper DLL
2Pre-OS Boot
1Bootkit
1Privilege Escalation
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Boot or Logon Autostart Execution
3Registry Run Keys / Startup Folder
1Winlogon Helper DLL
2Defense Evasion
Abuse Elevation Control Mechanism
1Bypass User Account Control
1File and Directory Permissions Modification
1Hide Artifacts
2Hidden Files and Directories
2Impair Defenses
3Disable or Modify Tools
3Modify Registry
10Pre-OS Boot
1Bootkit
1