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It used nested run-only AppleScript files to retrieve its malicious code across different stages at the time.

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The reason was that the researchers were unable to retrieve the malware’s full code.

However, the reports written after this were not very detailed and did not capture the full extent of OSAMiner’s capabilities. Back in 2018 August and September, two Chinese security firms analyzed an older version of the Malware. However, the crypto miner did not completely avoid detection. Not too invisibleįrom the data collected, it seems that it attacked people in Chinese and Asian Pacific communities mostly. OSAMiner has been active for a while and has evolved in recent times, according to a SentinelOne spokesperson. According to SentinelOne, a security firm, which published a report this week.

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It is disguised in pirated (cracked) games and software like League of Legends and Microsoft Office for Mac. The malware has been distributed in the wild since at least 2015 and has been named OSAMiner. For more than five years, macOS users have been the targets of a sneaky malware operation that used a clever trick to avoid detection and hijacked the hardware resources of infected users to mine cryptocurrency behind their backs.In the last five years (perhaps more), macOS users have been targeted by a sneaky malware operation, which used a clever trick, making it virtually invisible, while hijacking hardware resources on infected machines to mine cryptocurrency. Named OSAMiner, the malware has been distributed in the wild since at least 2015 disguised in pirated (cracked) games and software such as League of Legends and Microsoft Office for Mac, security firm SentinelOne said in a report published this week. “OSAMiner has been active for a long time and has evolved in recent months,” a SentinelOne spokesperson told ZDNet in an email interview on Monday. “From what data we have it appears to be mostly targeted at Chineses/Asia-Pacific communities,” the spokesperson added. Nested run-only AppleScripts, for the win!īut the cryptominer did not go entirely unnoticed. SentinelOne said that two Chinese security firms spotted and analyzed older versions of the OSAMiner in August and September 2018, respectively.īut their reports only scratched the surface of what OSAMiner was capable of, SentinelOne macOS malware researcher Phil Stokes said yesterday.

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The primary reason was that security researchers weren’t able to retrieve the malware’s entire code at the time, which used nested run-only AppleScript files to retrieve its malicious code across different stages.Īs users installed the pirated software, the boobytrapped installers would download and run a run-only AppleScript, which would download and run a second run-only AppleScript, and then another final third run-only AppleScript. #MALWARE YEARS USED RUNONLY AVOID FIVE DOWNLOAD# Since “run-only” AppleScript come in a compiled state where the source code isn’t human-readable, this made analysis harder for security researchers. #MALWARE YEARS USED RUNONLY AVOID FIVE CODE# Yesterday, Stokes published the full-chain of this attack, along with indicators of compromise (IOCs) of past and newer OSAMiner campaigns. Stokes and the SentinelOne team hope that by finally cracking the mystery surrounding this campaign and by publishing IOCs, other macOS security software providers would now be able to detect OSAMiner attacks and help protect macOS users. “In this case, we have not seen the actor use any of the more powerful features of AppleScript that we’ve discussed elsewhere, but that is an attack vector that remains wide open and which many defensive tools are not equipped to handle.” “Run-only AppleScripts are surprisingly rare in the macOS malware world, but both the longevity of and the lack of attention to the macOS.OSAMiner campaign, which has likely been running for at least 5 years, shows exactly how powerful run-only AppleScripts can be for evasion and anti-analysis,” Stokes concluded in his report yesterday.

The IOCs are available in the SentinelOne OSAMiner report, here. Spyware is software that resides on a computer and sends information to its creator. That information may include surfing habits, system details or, in its most dangerous form, passwords and login information for critical applications such as online banking. Many spyware programs are more annoying than dangerous, serving up pop-up ads or gathering e-mail addresses for use in spam campaigns. Even those programs, however, can cost you valuable time and computing resources.

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Often, spyware comes along with a free software application, such as a game or a supposed productivity booster. #MALWARE YEARS USED RUNONLY AVOID FIVE DOWNLOAD#.#MALWARE YEARS USED RUNONLY AVOID FIVE CODE#.#MALWARE YEARS USED RUNONLY AVOID FIVE SOFTWARE#.