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