rule SUSP_MacOS_Plist_Suspicious { meta: description = "Suspicious PLIST files in MacOS (possible malware persistence)" author = "John Lambert @JohnLaTwC" date = "2018-12-14" modified = "2023-10-19" old_rule_name = "gen_malware_MacOS_plist_suspicious" reference = "https://objective-see.com/blog/blog_0x3A.html" hash1 = "0541fc6a11f4226d52ae3d4158deb8f50ed61b25bb5f889d446102e1ee57b76d" hash2 = "6cc6abec7d203f99c43ce16630edc39451428d280b02739757f17fd01fc7dca3" hash3 = "76eb97aba93979be06dbf0a872518f9514d0bb20b680c887d6fd5cc79dce3681" hash4 = "8921e3f1955f7141d1231f8cfd95230143525f259e578fdc1dd98494f62ec4a1" hash5 = "9a3fd0d2b0bca7d2f7e3c70cb15a7005a1afa1ce78371fd3fa9c526a288b64ce" hash6 = "737355121685afc38854413d8a1657886f9aa24f54673953749386defe843017" hash7 = "9b77622653934995ee8bb5562df311f5bb6d6719933e2671fe231a664da76d30" hash8 = "c449f8115b4b939271cb92008a497457e1ab1cf2cbd8f4b58f7ba955cf5624f0" hash9 = "cdb2fb9c8e84f0140824403ec32a2431fb357cd0f184c1790152834cc3ad3c1b" id = "61b5986d-35c9-5e1a-a077-14cecdbed36f" strings: $sr1 = "PropertyList-" $sr2 = "<plist" $p1 = "python" ascii $p2 = "<string>-c" ascii // possible bitcoin wallet. could be coinminer config $v0 = /\<string\>[\/|\w]{0,20}\+[\/|\+|=|\w]{59,80}\<\/string\>/ //see 0541fc6a11f4226d52ae3d4158deb8f50ed61b25bb5f889d446102e1ee57b76d $v1 = "curl " fullword // see 9a3fd0d2b0bca7d2f7e3c70cb15a7005a1afa1ce78371fd3fa9c526a288b64ce $v2 = "PAYLOAD_DATA" $v3 = "base64" // see 9a3fd0d2b0bca7d2f7e3c70cb15a7005a1afa1ce78371fd3fa9c526a288b64ce //PAYLOAD_BASE64 $vb640 = /(AAQQBZAEwATwBBAEQAXwBCAEEAUwBFADYANA|AEEAWQBMAE8AQQBEAF8AQgBBAFMARQA2ADQA|BBWUxPQURfQkFTRTY0|QVlMT0FEX0JBU0U2N|UABBAFkATABPAEEARABfAEIAQQBTAEUANgA0A|UEFZTE9BRF9CQVNFNj)/ //subprocess $vb641 = /(AHUAYgBwAHIAbwBjAGUAcwBzA|c3VicHJvY2Vzc|cwB1AGIAcAByAG8AYwBlAHMAcw|dWJwcm9jZXNz|MAdQBiAHAAcgBvAGMAZQBzAHMA|N1YnByb2Nlc3)/ // #!/usr $vb642 = "IyEvdXNy" // # -*- $vb643 = "IyAtKi0" //add_header $vb644 = /(AGQAZABfAGgAZQBhAGQAZQByA|EAZABkAF8AaABlAGEAZABlAHIA|FkZF9oZWFkZX|YQBkAGQAXwBoAGUAYQBkAGUAcg|YWRkX2hlYWRlc|ZGRfaGVhZGVy)/ $fp1 = " do 	echo" // Shells.plist $fp2 = "<string>com.cisco.base64</string>" // Webex $fp3 = "video/mp4;base64" $fp4 = "<key>Content-Length</key>" $fp5 = "<string>yara</string>" $fp6 = "<key>Frameworks/base64.framework</key>" ascii /* Webex */ $fp7 = "<key>Headers/base64.h</key>" ascii /* Webex */ $fp8 = "database64" ascii fullword $fp9 = "<!-- last arg will be replaced by the installer script -->" ascii $fp10 = "<key>/usr/local/bin/python</key>" $fp11 = "<key>/usr/bin/ruby</key>" condition: filesize < 20KB and uint32be(0) == 0x3c3f786d and all of ($sr*) and @sr2[1] < 0x100 and ( 1 of ($v*) or all of ($p*) ) and not 1 of ($fp*) }