thepostmaster wants to raise $2 billion to cover a budget shortfall. investigators are closing in shortfall. investigators are closing in security breach that affected millions of target customers. here's abc. >> reporter: the man who break the news of the massive target hacking may be zeroing in on the culpr culprits. cybersecurity expert brian krebs showed us this black market website known as a card dump where he says criminals are selling stolen data from target customers right now. you can see how the cards are advertised. by expiration date. the cardholder's zip code, issuing bank, and the prices -- between $26 and $45. now krebs says he's traced the site to cyber-criminals in the ukraine. he also says that people who stole the target data may have gotten ahead of themselves. >> the bad guys are stealing so much information, they're having a hard time charging what they want for this information. and they're having a hard time offloading it to people -- enough people who want to buy it. >> reporter: and victims of the security breach are being hit again. this time, scam artists posing as target representatives, sending sham messages to