Sliver_Implant_32bit

YARA detection rule by gssincla@google.com · Apache-2.0

Sliver 32-bit implant (with and without --debug flag at compile)

rule Sliver_Implant_32bit
{
  meta:
    description = "Sliver 32-bit implant (with and without --debug flag at compile)"
    hash =  "911f4106350871ddb1396410d36f2d2eadac1166397e28a553b28678543a9357"
    author = "gssincla@google.com"
    reference = "https://cloud.google.com/blog/products/identity-security/making-cobalt-strike-harder-for-threat-actors-to-abuse"
    date = "2022-11-18"
    modified = "2022-11-19"

  strings:
    
        
    $s_tcppivot = { 81 ?? 74 63 70 70 [2-20] 81 ?? 04 69 76 6F 74  }

        
    $s_wg = { 66 81 ?? 77 67 }

        
    $s_dns = { 66 81 ?? 64 6E [2-20] 80 ?? 02 73 }

        
    $s_http = { 81 ?? 68 74 74 70 }

        
    $s_https = { 81 ?? 68 74 74 70 [2-20] 80 ?? 04 73 }

        
    $s_mtls = { 81 ?? 6D 74 6C 73 }

    $fp1 = "cloudfoundry" ascii fullword
  condition:
    4 of ($s*) and not 1 of ($fp*)
}

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

d53675e8-f508-430d-8469-b9c687689462

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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

[[ reason ]]

What does this mean?

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.

[[ reason ]]

What do these messages mean?

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

[[ currentRule.title ]]

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