Topology

1 Explorers

                 They are curious about making of logic bomb. Due to  this they result in making a logic bomb

2 Good Samaritans 

                 Dictionary meaning of “Samaritans” is people who are helpful and charitable. So unknowing they become a part in creating a logic bomb as they are unaware of rule violations.

3 Hackers

                 This is a group of people who are selfish and so they create a logic bomb for ego boost.

.4 Machiavellians

                 To advance their personal and career goals.

5 Avengers  

                 For revenge many employee have done this crime.ther can be a huge list of employee who tried to plant a logic bomb in his own company as he was not statisfied with company and wanted to take revenge from company.

For example:

                   In one case, a foreigner who had been residing in Simla, India for almost thirty years wanted to avail of a scheme introduced by the Simla Housing Board to buy land at lower rates. When he made an application it was rejected on the grounds that the 169 schemes was available only for citizens of India. He decided to take his revenge. Consequently he sent thousands of mails to the Simla Housing Board and repeatedly kept sending e-mails till their servers crashed.

.6 Career Thieves

                         An employee of a bank in USA was dismissed from his job. Disgruntled at having been supposedly mistreated by his employers the man first introduced a logic bomb into the bank’s systems.   

                   The logic bomb was programmed to take ten cents from all the accounts in the bank and put them into the account of the person whose name was alphabetically the last in the bank’s rosters. Then he went and opened an account in the name of Ziegler. The amount being withdrawn from each of the accounts in the bank was so insignificant that neither any of the account holders nor the bank officials noticed the fault.

                   It was brought to their notice when a person by the name of Zygler opened his account in that bank. He was surprised to find a sizable amount of money being transferred into his account every Saturday.

.7 Salami attacks:           

                  These attacks are used for the commission of financial crimes. The key here is to make the alteration so insignificant that in a single case it would go completely unnoticed. E.g. a bank employee inserts a program, into the bank’s servers, that deducts a small amount of money (say Rs. 5 a month) from the account of every customer. No account holder will probably notice this unauthorized debit, but the bank employee will make a sizable amount of money every month.