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1. YEARS RUNONLY APPLESCRIPTS AVOID DETECTION FOR FULL
2. YEARS RUNONLY APPLESCRIPTS AVOID DETECTION FOR SOFTWARE
3. YEARS RUNONLY APPLESCRIPTS AVOID DETECTION FOR CODE

YEARS RUNONLY APPLESCRIPTS AVOID DETECTION FOR SOFTWARE

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.įor 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.

Used runonly applescripts to avoid detection software# “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.

YEARS RUNONLY APPLESCRIPTS AVOID DETECTION FOR CODE

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. Since “run-only” AppleScript come in a compiled state where the source code isn’t human-readable, this made analysis harder for security researchers. Used runonly applescripts to avoid detection software#.The IOCs are available in the SentinelOne OSAMiner report, here. “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. 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. Yesterday, Stokes published the full-chain of this attack, along with indicators of compromise (IOCs) of past and newer OSAMiner campaigns.

YEARS RUNONLY APPLESCRIPTS AVOID DETECTION FOR FULL

Malware used runonly applescripts avoid detection full The malware has been researched in the past 1, 2 but the run-only AppleScript file hindered full analysis, limiting it to observing the behavior of the sample. 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. the VM and sandbox detection techniques that malware authors use to avoid.

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.