macos malware runonly avoid detection for

MACOS MALWARE RUNONLY AVOID DETECTION FOR UPDATE
MACOS MALWARE RUNONLY AVOID DETECTION FOR SOFTWARE
MACOS MALWARE RUNONLY AVOID DETECTION FOR CODE
MACOS MALWARE RUNONLY AVOID DETECTION FOR DOWNLOAD

MACOS MALWARE RUNONLY AVOID DETECTION FOR UPDATE

The Mojave update introduced the concept of app notarization, a pre-distribution code-scanning service performed by Apple that looks for malicious content and signing problems in developer-signed apps. But it's refusal to do so makes the claim at least worth discussing, given that it's not very far from changes delivered in macOS Mojave (10.14). The last time this reporter got an immediate, unequivocal response from Apple was in 2006 when, after asking about the health of then CEO Steve Jobs (visibly frail at the time and two years after Jobs disclosed his cancer diagnosis), the company's comms chief herself sent an email insisting, 'Steve’s health is robust and we have no idea where these rumors are coming from.'Īpple, of course, has no obligation to its customers, developers or the general public to address speculation. 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.

MACOS MALWARE RUNONLY AVOID DETECTION FOR SOFTWARE

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.

MACOS MALWARE RUNONLY AVOID DETECTION FOR CODE

Since “run-only” AppleScript come in a compiled state where the source code isn’t human-readable, this made analysis harder for security researchers.

MACOS MALWARE RUNONLY AVOID DETECTION FOR DOWNLOAD

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.

Macos malware runonly avoid detection for