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 * Asia Pacific
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 * भारत गणराज्य (India)
 * Indonesia
 * 日本 (Japan)
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 * Malaysia
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 * España
 * France
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 * Nederland
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undefined



 * Definition
 * Command and Control [C&C] Server


COMMAND AND CONTROL [C&C] SERVER

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A command-and-control [C&C] server is a computer controlled by an attacker or
cybercriminal which is used to send commands to systems compromised by malware
and receive stolen data from a target network. Many campaigns have been found
using cloud-based services, such as webmail and file-sharing services, as C&C
servers to blend in with normal traffic and avoid detection.



How C&C servers are used

C&C servers serve as command centers that malware related to targeted attacks
use to store stolen data or download commands from. Establishing C&C
communications is a vital step for attackers to move laterally inside a network.

C&C servers also serve as the headquarters for compromised machines in a botnet.
It can be used to disseminate commands that can steal data, spread malware,
disrupt web services, and more.  C&C systems used by botnets may follow any of
these three models: the centralized model, the peer-to-peer [P2P] model, and the
random model.

Malicious uses of a C&C server

C&C servers are the headquarters or command centers where malware related to
targeted attacks report back to so  stolen data or download malicious commands
can be stored. Establishing C&C communications is a vital step for attackers to
move laterally inside a network.

C&C servers also serve as the headquarters for compromised machines in a botnet.
It can be used to disseminate commands that can steal data, spread malware,
disrupt web services, and more.  C&C systems used by botnets may follow any of
these three models: the centralized model, the peer-to-peer [P2P] model, and the
random model.

Aside from allowing attackers to steal data, the presence of C&C software on a
server may also disrupt legitimate applications and cause the misuse of future
resources. 


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