The group, which has been in operation for quite sometime, even sought duplicate SIM cards of the mobile phones used by the persons whose accounts they hacked through Internet to disable them getting text alerts on the transaction.
Internet banking is a highly-secured mode of transaction, but these technically-sound persons managed to crack the passwords of accounts of a few people and withdrew money from their accounts, police said.
But Ajay Kumar Mishra, Binay Kumar, Ravi Shankar Pandey and Jitender Kumar ran out of luck when police caught them.
The action came on a complaint filed by Ravi Gupta that Rs 15 lakh have been transferred from his account illegally through electronic transferring system.
Police arrested Jitender and Binay last week when they were trying to withdraw the remaining amount cheated from the account of accused Jitender Kumar.
Based on their interrogation, Ajay and Ravi Pandey were arrested and Rs 30,000 was recovered from them.
"The members of the gang have thorough knowledge and understanding of Internet banking. They used to hack the computers of different companies having their current accounts in multi national banks," a senior police official said.