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AntiScam Checks #2

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62825bd
Antiscam Checks
zrodevkaan Dec 7, 2025
541bdb0
Error handling
zrodevkaan Dec 7, 2025
62b594a
Guh
zrodevkaan Dec 7, 2025
75201e6
Remove log
zrodevkaan Dec 7, 2025
0864ae0
Fix lint
zrodevkaan Dec 7, 2025
2c69b94
Revamp
zrodevkaan Dec 11, 2025
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128 changes: 96 additions & 32 deletions src/events/detectspam.ts
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Original file line number Diff line number Diff line change
@@ -1,12 +1,61 @@
import {EmbedBuilder, Events, Message, PermissionFlagsBits} from "discord.js";
import {guildDB} from "../db";
import { EmbedBuilder, Events, Message, PermissionFlagsBits } from "discord.js";
import { guildDB } from "../db";
import Colors from "../util/colors";
import Messages from "../util/messages";


const fakeDiscordRegex = new RegExp(`([a-zA-Z-\\.]+)?d[il][il]?scorr?(cl|[ldb])([a-zA-Z-\\.]+)?\\.(com|net|app|gift|ru|uk)`, "ig");
const okayDiscordRegex = new RegExp(`([a-zA-Z-\\.]+\\.)?discord((?:app)|(?:status))?\\.(com|net|app)`, "i");
const fakeSteamRegex = new RegExp(`str?e[ea]?mcomm?m?un[un]?[un]?[tl]?[il][tl]?ty\\.(com|net|ru|us)`, "ig");
const sketchyRuRegex = new RegExp(`([a-zA-Z-\\.]+).ru.com`, "ig");
type Patterns = {
regex: RegExp,
whitelist: string[],
mute: boolean,
predicate: (links: [], self: Patterns) => boolean,
reason: string,
}

const phishingPatterns = [
{
regex: /([a-zA-Z-\\.]+)?d[il][il]?scorr?(cl|[ldb])([a-zA-Z-\\.]+)?\.(com|net|app|gift|ru|uk)/ig,
whitelist: ['discord.com', 'discordapp.com'],
mute: true,
predicate: (links, self) => {
const hosts = links.map(match => {
const url = match[0];
return URL.parse(url)?.host;
}).filter(Boolean);
return hosts.some(host => !self.whitelist.includes(host));
},
reason: 'Fake Discord Domain'
},
{
regex: /str?e[ea]?mcomm?m?un[un]?[un]?[tl]?[il][tl]?ty\.(com|net|ru|us)/ig,
whitelist: ['steamcommunity.com'],
mute: true,
predicate: (links, self) => {
const hosts = links.map(match => {
const url = match[0];
return URL.parse(url)?.host;
});

return hosts.some(host => !self.whitelist.includes(host));
},
reason: 'Fake Steam Link'
},
{
regex: /([a-zA-Z-\\.]+)\.ru\.com/ig,
whitelist: [],
mute: true,
predicate: (links, self) => links.length > 0,
reason: 'Suspicious .ru.com Domain'
},
{
regex: /(?:http[s]?:\/\/.)?(?:www\.)?[-a-zA-Z0-9@%._\+~#=]{2,256}\.[a-z]{2,6}\b(?:[-a-zA-Z0-9@:%_\+.~#?&\/\/=]*)/ig,
whitelist: [],
mute: true,
predicate: (links, self) => links.length == self.maxCount, // this should probably be more than 4 later on.
reason: 'Potential Scam Message',
maxCount: 4
}
] as Patterns[]

// TODO: consider de-duping with invitefilter event
export default {
Expand All @@ -22,29 +71,44 @@ export default {
const current = await guildDB.get(message.guild.id) ?? {};
if (!current?.detectspam) return;

/*
const fakeDiscordMatches = message.content.match(fakeDiscordRegex) || [];
const fakeSteamMatches = message.content.match(fakeSteamRegex) || [];
const isFakeDiscord = fakeDiscordMatches.some(s => {
if (okayDiscordRegex.test(s)) return false;
else if (s.toLowerCase() === "betterdiscord.app") return false;
return true;
});
const isFakeSteam = fakeSteamMatches.some(s => s.toLowerCase() !== "steamcommunity.com");
const isSketchy = sketchyRuRegex.test(message.content);
if (!isFakeDiscord && !isFakeSteam && !isSketchy) return; // Not spam, let's get out of here

let reason = "Sketchy Link";
if (isFakeDiscord) reason = "Fake Discord Link";
if (isFakeSteam) reason = "Fake Steam Link";

try {
await message.delete();
}
catch {
// TODO: logging?
console.error("Could not delete detect spam message. Likely permissions.");
}*/

const fakeDiscordMatches = message.content.match(fakeDiscordRegex) || [];
const fakeSteamMatches = message.content.match(fakeSteamRegex) || [];
const isFakeDiscord = fakeDiscordMatches.some(s => {
if (okayDiscordRegex.test(s)) return false;
else if (s.toLowerCase() === "betterdiscord.app") return false;
return true;
});
const isFakeSteam = fakeSteamMatches.some(s => s.toLowerCase() !== "steamcommunity.com");
const isSketchy = sketchyRuRegex.test(message.content);
if (!isFakeDiscord && !isFakeSteam && !isSketchy) return; // Not spam, let's get out of here
let reasons: string[] = [];

let reason = "Sketchy Link";
if (isFakeDiscord) reason = "Fake Discord Link";
if (isFakeSteam) reason = "Fake Steam Link";
for (var pattern of phishingPatterns) {
const links = Array.from(message.content.matchAll(pattern.regex))
const shouldReason = pattern.predicate(links, pattern)
if (shouldReason) {
reasons.push(pattern.reason)
}
}

try {
if (reasons.length > 0) {
await message.delete();
}
catch {
// TODO: logging?
console.error("Could not delete detect spam message. Likely permissions.");
}


let didMute = false;
const muteRoleId = message.guild.roles.cache.findKey(r => r.name.toLowerCase().includes("mute"));
Expand All @@ -67,21 +131,21 @@ export default {
if (!modlogId || !modlogChannel || !modlogChannel.isTextBased()) return; // Can't log

const dEmbed = new EmbedBuilder().setColor(Colors.Info)
.setAuthor({name: message.author.username, iconURL: message.author.displayAvatarURL()})
.setAuthor({ name: message.author.username, iconURL: message.author.displayAvatarURL() })
.setDescription(`Message sent by ${message.author.username} in ${message.channel.name}\n\n` + message.content)
.addFields({name: "Reason", value: reason})
.setFooter({text: `ID: ${message.author.id}`}).setTimestamp(message.createdTimestamp);
await modlogChannel.send({embeds: [dEmbed]});
.addFields({ name: "Reason(s)", value: reasons.join(', ') })
.setFooter({ text: `ID: ${message.author.id}` }).setTimestamp(message.createdTimestamp);
await modlogChannel.send({ embeds: [dEmbed] });


if (didMute) {
const mEmbed = new EmbedBuilder().setColor(Colors.Info)
.setAuthor({name: "Member Muted", iconURL: message.author.displayAvatarURL()})
.setAuthor({ name: "Member Muted", iconURL: message.author.displayAvatarURL() })
.setDescription(`${message.author.displayName} ${message.author.tag}`)
.addFields({name: "Reason", value: reason})
.setFooter({text: `ID: ${message.author.id}`}).setTimestamp(message.createdTimestamp);
.addFields({ name: "Reason(s)", value: reasons.join(', ') })
.setFooter({ text: `ID: ${message.author.id}` }).setTimestamp(message.createdTimestamp);

await modlogChannel.send({embeds: [mEmbed]});
await modlogChannel.send({ embeds: [mEmbed] });
}
},
};