The LockBit gang is building ransomware for new architectures, forgoing Windows and potentially posing entirely new problems for their victims along the way.
In a blog published June 22, researchers from Kaspersky describe having “stumbled on” a .ZIP file with a trove of LockBit malware samples inside. The samples appear to have derived from LockBit’s previous encryptor variations targeting VMWare ESXi hypervisors.
The samples targeted FreeBSD and Linux — a growing trend among ransomware actors — plus various embedded technologies, including instruction set architecture (ISA) firmware for CPUs, like ARM, MIPS, ESA/390, and PowerPC, as well as Apple M1, an ARM-based system-on-chip (SoC) used in Mac and iPad devices.
The samples were clearly a work in progress, Kaspersky noted, since “for instance, the macOS sample was unsigned, so it could not be executed as is. Also, the string encryption method was simple: one-byte XOR.”
Should they eventually make it to the wild, however, these new ransomware variants could prove useful to LockBit as it tries to stay relevant, says Jason Baker, threat intelligence analyst at GuidePoint Security. “In an increasingly crowded RaaS marketplace competing for talent and targets, this kind of differentiating behavior may ultimately benefit LockBit despite the additional costs and lower volume of targets.”
Can LockBit Deliver Embedded Ransomware?
Especially after the breakup of Conti, LockBit arguably took up the mantle as the world’s premier ransomware gang. Last month brought a notable decline in its activity, however. While the ransomware industry rose as a whole, LockBit claimed 30% fewer victims than the month prior.
Perhaps, in retrospect, it was dedicating extra time and resources to developing its new malware. Or, perhaps, the new malware is a response to its decline.
Either way, its new direction is a cause for concern for defenders. Security analysts already raised the alarm on Android SoCs in 2021, Apple M1 in 2022, and multiple vulnerabilities in popular AMI SoCs were revealed earlier this year.
“We’re seeing increased reporting lately related to embedded devices being used for persistence,” reports Adam Pennington, project leader for…