The US Federal Bureau of Investigation (FBI) published a joint cybersecurity advisory with the US Secret Services which revealed that the BlackByte ransomware group has breached at least three organizations from US critical infrastructure sectors in the last three months.
“This joint Cybersecurity Advisory was developed by the Federal Bureau of Investigation (FBI) and the U.S. Secret Service (USSS) to provide information on BlackByte ransomware. As of November 2021, BlackByte ransomware had compromised multiple US and foreign businesses, including entities in at least three US critical infrastructure sectors (government facilities, financial, and food & agriculture).” reads the advisory. “BlackByte is a Ransomware as a Service (RaaS) group that encrypts files on compromised Windows host systems, including physical and virtual servers.”
The BlackByte ransomware operation has been active since September 2021, in October 2021 researchers from Trustwave’s SpiderLabs released a decryptor that can allow victims of early versions of BlackByte ransomware to restore their files for free.
Government experts reported that the gang exploited a known Microsoft Exchange Server vulnerability to gain access to some victims’ networks. Once gained access to the network, threat actors deployed tools to perform lateral movements and escalate privileges before exfiltrating and encrypting files.
The advisory includes indicators of compromise (IOCs) for the BlackByte ransomware operation that could allow defenders to detect the threat. The report includes MD5 hashes of suspicious ASPX files discovered on compromised Microsoft Internet Information Services (IIS) servers and a list of commands used by ransomware operators observed by the researchers.
The advisory also provides mitigations:
Recently the San Francisco 49ers NFL team has fallen victim to a BlackByte ransomware attack, the news was reported by The Record.
The team disclosed the attack after that the ransomware gang added the team to the list of its victims on its dark web leak site.
The team told The Record that it immediately launched an investigation into the attack and took steps to contain the incident with the help of third-party cybersecurity firms, it also notified law enforcement.
(SecurityAffairs – hacking, ransomware)