Linux_Trojan_Metasploit_5d26689f

YARA detection rule by Elastic Security · Elastic License v2

Detects x86 msfvenom bind TCP random port payloads

rule Linux_Trojan_Metasploit_5d26689f {
    meta:
        author = "Elastic Security"
        id = "5d26689f-3d3a-41f1-ac32-161b3b312b74"
        fingerprint = "b78fda9794dc24507405fc04bdc0a3e8abfcdc5c757787b7d9822f4ea2190120"
        creation_date = "2024-05-07"
        last_modified = "2024-05-21"
        description = "Detects x86 msfvenom bind TCP random port payloads"
        threat_name = "Linux.Trojan.Metasploit"
        reference_sample = "dafefb4d79d848384442a697b1316d93fef2741fca854be744896ce1d7f82073"
        severity = 100
        arch_context = "x86"
        scan_context = "file, memory"
        license = "Elastic License v2"
        os = "linux"
    strings:
        $tiny_bind = { 31 D2 52 68 2F 2F 73 68 68 2F 62 69 6E 68 2D 6C 65 2F 89 E7 52 68 2F 2F 6E 63 68 2F 62 69 6E 89 E3 52 57 53 89 E1 31 C0 B0 0B CD 80 }
        $reg_bind_setup = { 31 DB F7 E3 B0 66 43 52 53 6A 02 89 E1 CD 80 52 50 89 E1 B0 66 B3 04 CD 80 B0 66 43 CD 80 59 93 }
        $reg_bind_dup_loop = { 6A 3F 58 CD 80 49 79 }
        $reg_bind_execve = { B0 0B 68 2F 2F 73 68 68 2F 62 69 6E 89 E3 41 CD 80 }
    condition:
        ($tiny_bind) or (all of ($reg_bind*))
}

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

b1bdb212-5317-4c6c-b417-a95541583859

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Executable code, not a declarative rule

This submission is arbitrary [[ currentRule.format ? currentRule.format.toUpperCase() : '' ]] code, not a declarative detection rule — review it as you would any script before running it, and note that it cannot be safely aggregated or auto-executed alongside YARA/Sigma/Suricata/CRS rules.

Rejected pattern present

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Format & documentation suggestions

Not a security issue — this rule is valid and was accepted as-is. These are optional fields/conventions its own format recommends, mainly affecting its quality score and how well it documents itself for other reviewers.

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[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

[[ currentRule.title ]]

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