apt_gamaredon_powerrevshell

YARA detection rule by Sekoia.io · GPL-2.0

Detects Powershell reverse shell

rule apt_gamaredon_powerrevshell {
  meta:
    id             = "b5161c23-c607-4096-9f4a-1be516a0a614"
    version        = "1.0"
    description    = "Detects Powershell reverse shell"
    author         = "Sekoia.io"
    creation_date  = "2023-02-08"
    classification = "TLP:CLEAR"

  strings:
    $ = "iex $enc.GetString("
    $ = "$stream.Write"
    $ = ".).FullName"
    $ = "Sockets.TcpClient"
    $ = "\">\";"

  condition:
    all of them and filesize < 3000
}

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

64142f3e-cbb2-4902-8b3b-af996eebf2c2

Propose edits, view related rules, and engage with the community through comments.

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 ]]

Community Discussion