A computer worm is a type of malicious software program that replicates itself to spread across computers and networks without needing to attach itself to other files. Unlike viruses, worms can spread independently and often exploit vulnerabilities in software to infect systems. They can cause damage by consuming system resources, slowing down or crashing systems, or creating security vulnerabilities.

Its a process that is underlying between fake and authenticity. First identification the seller will first request for upfront to purchase ( skip this first red flag), Second seller will complain and requires more money to buy whatever ( 2nd red flag). Two counts is good enough to proof is fake.

A genuine seller will never be in need of a buyer. A buyer is always in need of a genuine seller. ( Both show and conduct proof being mutual )

A genuine situation, buyer proof its capability to buy, seller will initiate the works and proof its capability. Once proven, it all depends on the negotiation between both parties their next move which varies over the amount and the works. Ideology behind this is buyer see the result and pay provided capability to pay is proven. ( a buyer with money is genuine once they have the result). Seller with genuine solutions will be at advantage. So its easy to identify.