Applicants at a labour market in Xi'an, China on February 27, 2016. VCG | Getty Images

In Russia, one organization is looking for "long-term, quality employees" from telecommunications providers with the promise of "fair, on-time" pay. Another group promises experienced bankers around $2,000 per month for "one hour of work per day." In Mexico, another ad promises employees from well-known banks high pay with little risk, on the condition of "absolute discretion." This is today's competitive job market for criminal corporate insiders. This week, Amazon said it is investigating claims that company insiders across Asia were making money by selling retail secrets. In their case, corporate insiders may have been trading in proprietary information to help Amazon marketplace sellers based in the region get an unfair sales advantage.

But Amazon is far from the only company facing pervasive insider threats, especially in locations in Eastern Europe, Russia, Asia and North Africa. There, employees can sometimes quadruple their salaries or more by working with a criminal enterprise to sabotage their own employer.

'Employees of any bank needed'

According to Ziv Mador, vice president of research for cybersecurity and compliance management company Trustwave, global corporations are facing this problem more requently, as even trusted employees may find themselves on the receiving end of unwanted solicitations to take part in simple, but illegal, "side work." In monitoring the dark web — parts of the internet accessible only with specific search engines, software or configurations — Mador has observed numerous postings seeking very specific types of employees at big-name employers. Examples shown here come from Russia and Mexico.

"The salaries listed are quite high, sometimes 10 times what the average salary for an average job at a bank would be," he said. Insider threats proliferate, he said, in areas where salaries may below and law enforcement is lax in looking for employees who might be participating in insider crimes. "[Criminal recruiters] are looking for many different tasks: increasing withdrawal limits on bank accounts, getting more information about people who they want to target. They are looking for people who work in tax offices, or in other cases, they look for people who can tell them how to log in and how to connect to certain accounts," Mador said.