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High Severity

Link: JavaScript obfuscation with Telegram bot integration

Description

Detects links containing obfuscated JavaScript code with embedded Telegram bot tokens or API references, indicating potential data exfiltration or command and control infrastructure.

References

No references.

Sublime Security
Created Feb 25th, 2026 • Last updated Feb 25th, 2026
Source
type.inbound
and 0 < length(body.links) < 15
and length(recipients.to) == 1
and recipients.to[0].email.domain.valid
and any(body.links,
        // javascript obfuscator code - https://obfuscator.io/
        regex.icontains(ml.link_analysis(.).final_dom.raw,
                        '(?:(?:return|function|var|let|const|parseInt)\(?\s*_0x[a-f0-9]{6}.{0,50}){5}'
        )
        and regex.icontains(ml.link_analysis(.).final_dom.raw,
                            // telegram bot token struct
                            '[\x22\x27][0-9]{10}:[a-z0-9_-]{20,35}[\x22\x27]',
                            // telegram strings
                            '(?:telegram(?:chatid|BotToken)|TELEGRAM_(?:BOT_TOKENS|CHAT_IDS)|api\.telegram\.org/bot|telegramToken)'
        )
)
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