Our Using threat intelligence, our team has observed several different email addresses, but the same BTC addresses across multiple Ryuk executables. The ransom email used by Ryuk appears to be unique for each compiled executable. Ryuk Ransom Note Bearing Strong Resemblance to BitPaymer As of this writing, it remains unclear if WIZARD SPIDER is copying the TTPs (tactics, techniques and procedures) and ransom notes of BitPaymer, or whether the groups may share information with each other.įigure 3. Interestingly, the ransom note in Figure 3 is remarkably similar to the BitPaymer ransom notes. The email names typically are esoteric actors and directors, but Instagram models have also been observed. The email addresses usually contain one address at and another address at. The body of the template is static with the exception of the email address and the Bitcoin (BTC) wallet address, which may change. A number of different ransom note templates have been observed. The Ryuk ransom note is written to a file named RyukReadMe.txt.
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Want the latest insights on the cyber threat landscape? Download the 2021 Global Threat Report Since Ryuk’s appearance in August, the threat actors operating it have netted over 705.80 BTC across 52 transactions for a total current value of $3,701,893.98 USD. However, Ryuk is only used by WIZARD SPIDER and, unlike Hermes, Ryuk has only been used to target enterprise environments. Hermes is commodity ransomware that has been observed for sale on forums and used by multiple threat actors.
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Code comparison between versions of Ryuk and Hermes ransomware indicates that Ryuk was derived from the Hermes source code and has been under steady development since its release. Similar to Samas and BitPaymer, Ryuk is specifically used to target enterprise environments. The GRIM SPIDER actor name has been deprecated. However, in June 2019, further evidence emerged that allowed CrowdStrike to assess with high confidence that Ryuk is in fact operated as part of the core WIZARD SPIDER actor group.ĬrowdStrike Intelligence will now solely use the actor name WIZARD SPIDER in association with TrickBot and Ryuk. The actor name GRIM SPIDER was introduced into CrowdStrike’s nomenclature in September 2018 for the group that operates the Ryuk ransomware as a distinct sub-group of the WIZARD SPIDER criminal enterprise. This actor is a Russia-based criminal group known for the operation of the TrickBot banking malware that had focused primarily on wire fraud in the past. This methodology, known as “ big game hunting,” signals a shift in operations for WIZARD SPIDER. WIZARD SPIDER is a sophisticated eCrime group that has been operating the Ryuk ransomware since August 2018, targeting large organizations for a high-ransom return.