Ransomware has grown into a serious problem that has affected millions of users and netted millions of dollars in profit. The earlier entries in this series discussed the entry vectors of ransomware and their encryption behavior. In this post, we examine ransomware’s use of network communication and the possible solutions to address its effects.Read More
In a span of one to two weeks, three new open source ransomware strains have emerged, which are based on Hidden Tear and EDA2. These new ransomware families specifically look for files related to web servers and databases, which could suggest that they are targeting businesses.
Both Hidden Tear and EDA2 are considered as the first open source ransomware created for educational purposes. However, these were quickly abused by cybercriminals. RANSOM_CRYPTEAR.B is one of the many Hidden Tear spinoffs that infect systems when users access a hacked website from Paraguay. Magic ransomware (detected as RANSOM_MEMEKAP.A), based on EDA2, came soon after CRYPTEAR.B’s discovery.Read More
Like a game of cat and mouse, the perpetrators behind the Locky ransomware had updated their arsenal yet again with a new tactic—using Windows Scripting File (WSF) for the arrival method. WSF is a file that allows the combination of multiple scripting languages within a single file. Using WSF makes the detection and analysis of ransomware challenging since WSF files are not among the list of typical files that traditional endpoint solutions monitor for malicious activity.
However, the use of WSF files is no longer a novel idea since the same tactic was used in Cerber’s email campaign in May 2016. It would seem that the attackers behind Locky followed Cerber in using WSF files after seeing how such a tactic was successful in bypassing security measures like sandbox and blacklisting technologies.Read More
Perhaps emboldened by the success of their peers, attackers have been releasing more ransomware families and variants with alarming frequency. The latest one added to the list is R980 (detected by Trend Micro as RANSOM_CRYPBEE.A).
R980 has been found to arrive via spam emails, or through compromised websites. Like Locky, Cerber and MIRCOP, spam emails carrying this ransomware contain documents embedded with a malicious macro (detected as W2KM_CRYPBEE.A) that is programmed to download R980 through a particular URL. From the time R980 was detected, there have been active connections to that URL since July 26th of this year.Read More