Make sure your computer has an active connection to the internet.Step by step, do this now for all Windows computers: Then use Windows Sysinternals Process Explorer or Autoruns to test currently running executables against VirusTotal’s 67 antivirus engines, which offers the best accuracy you can ever get (with a small percentage of false positives). Here's what you should do: Install an antivirus product that does a decent job, has a long history of stability and decent success, and doesn’t slow down your system (unless you don't mind a little sluggishness). No product is going to be super-accurate over the course of an entire year. But again, no AV product is 100 percent accurate. Overall accuracy rates go up and down all the time, though some products score better than others. While antivirus engines eventually sniff out millions of malware variants, they're always one generation behind, failing to spot the stuff that has been self-modified to avoid discovery. This is because professional malware writers design their malware and botnet ecosystems to self-update whenever they start getting detected. "Antimalware" is more accurate and is my preferred term, but since the world knows it as "antivirus", that's the term I'll be using here.)Īll antivirus software misses a significant percentage of malware. (Note that while "antivirus" isn't exactly a misnomer, it's also not the most precise term for this type of software since computer viruses make up a very small percentage of detections these days. 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. Since "run-only" AppleScript come in a compiled state where the source code isn't human-readable, this made analysis harder for security researchers. 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. 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. Nested run-only AppleScripts, for the win!īut the cryptominer did not go entirely unnoticed. "From what data we have it appears to be mostly targeted at Chineses/Asia-Pacific communities," the spokesperson added. "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. 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. 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.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |