39 lines
1.3 KiB
Text
39 lines
1.3 KiB
Text
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rule MAL_Fortinet_COATHANGER_Beacon {
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meta:
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description = "Detects COATHANGER beaconing code"
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malware = "COATHANGER"
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author = "NLD MIVD - JSCU"
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date = "2024-02-06"
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reference = "https://www.ncsc.nl/documenten/publicaties/2024/februari/6/mivd-aivd-advisory-coathanger-tlp-clear"
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id = "0c84e6e4-afae-5150-82e2-8de528cd11fc"
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strings:
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$chunk_1 = { 48 B8 47 45 54 20 2F 20 48 54 48 89 45 B0 48 B8 54 50 2F 32 0A 48 6F 73 48 89 45 B8 48 B8 74 3A 20 77 77 77 2E 67 48 89 45 C0 48 B8 6F 6F 67 6C 65 2E 63 6F }
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condition:
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uint32(0) == 0x464c457f and filesize < 5MB and
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any of them
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}
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rule MAL_Fortinet_COATHANGER_Files {
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meta:
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description = "Detects COATHANGER files by used filenames"
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malware = "COATHANGER"
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author = "NLD MIVD - JSCU"
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date = "2024-02-06"
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reference = "https://www.ncsc.nl/documenten/publicaties/2024/februari/6/mivd-aivd-advisory-coathanger-tlp-clear"
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id = "0aa2f266-247b-5510-9fd9-4c7940fb80e8"
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strings:
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$1 = "/data2/"
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$2 = "/httpsd"
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$3 = "/preload.so"
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$4 = "/authd"
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$5 = "/tmp/packfile"
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$6 = "/smartctl"
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$7 = "/etc/ld.so.preload"
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$8 = "/newcli"
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$9 = "/bin/busybox"
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condition:
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(uint32(0) == 0x464c457f or uint32(4) == 0x464c457f)
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and filesize < 5MB and 4 of them
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}
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