andromeda_bot

YARA detection rule by https://github.com/reed1713 · GPL-2.0

IOC looks for the creation or termination of a process associated with the Andromeda Trojan. The malware will execute the msiexec.exe within the suspicious directory. Shortly after, it creates and injects itself into the wuauctl.exe (windows update) process. It then attempts to beacon to its C2.

rule andromeda_bot
{ 
    meta:
        maltype = "Andromeda bot"
        author = "https://github.com/reed1713"
        description = "IOC looks for the creation or termination of a process associated with the Andromeda Trojan. The malware will execute the msiexec.exe within the suspicious directory. Shortly after, it creates and injects itself into the wuauctl.exe (windows update) process. It then attempts to beacon to its C2."
   
    strings:
        $type="Microsoft-Windows-Security-Auditing"
        $eventid="4688"
        $data="AppData\\Local\\Temp\\_.net_\\msiexec.exe"

    condition:
        all of them
}

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

eee4b7b8-f99a-4cfc-8455-ddb3735a3cc7

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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 ]]

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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.

[[ 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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