stealergram

A Telegram-based credential exposure monitor for threat intelligence teams. Watches channels for combo/stealer log files and alerts you when your organization's credentials appear in them.

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How it works

User session (Telethon)
  └─ watches N channels
       └─ detects file attachments (.txt, .zip, .7z, .rar)
            └─ downloads → extracts → searches line by line
                 └─ hit? → writes to data/ + sends bot alert
                 └─ no hit? → deletes file, moves on

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Project structure

stealergram/
├── main.py           Entry point
├── config.py         All settings (keywords, channels, paths)
│
├── core/             Telegram I/O pipeline
│   ├── scraper.py        Live listener + backfill
│   ├── tdl_downloader.py Fast downloads via tdl (Go MTProto)
│   ├── bot_downloader.py Inline button / bot-dispatched file flows
│   ├── processor.py      Archive extraction + line-by-line search
│   └── notifier.py       hits.txt / hits.csv writer + bot alerts
│
├── utils/            Pure logic - no Telegram dependencies
│   ├── scorer.py         Hit severity scoring
│   ├── cache.py          Seen-file deduplication
│   └── database.py       SQLite persistence layer
│
├── tui/              Textual TUI frontend
│   ├── app.py            MonitorApp + all Screen classes
│   └── events.py         Thread-safe event bus (bot thread → TUI)
│
└── data/             Runtime-generated (gitignored)
    ├── hits.db           SQLite database
    ├── hits.txt          Human-readable hit log
    ├── hits.csv          CSV hit log (importable into Excel / pandas)
    ├── dedup.json        Deduplication hashes
    ├── cache.json        Seen file-ID cache
    └── logs/monitor.log

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Setup

1. Get Telegram API credentials

• Go to https://my.telegram.org → API development tools
• Create an app → note your api_id and api_hash

2. Create a bot

• Message @BotFather → /newbot
• Start a chat with your new bot before running

3. Get your chat ID

• Message @userinfobot

4. Configure

cp .env.example .env
# fill in API_ID, API_HASH, BOT_TOKEN, NOTIFY_CHAT_ID

Open config.py and set:

• TARGET_KEYWORDS - your org's domains and email patterns. Keywords with @ (e.g. r"@myorg\.cl") are employee email domains → CRITICAL. Keywords without @ are plain domain matches → LOW baseline.
• WATCHED_CHANNELS - channel usernames or numeric IDs
• BACKFILL_LIMIT - past messages to scan per channel on startup

5. Install dependencies

pip install -r requirements.txt
# rarfile needs the unrar binary:
# Ubuntu/Debian: sudo apt install unrar
# macOS:         brew install rar

5a. Install tdl (strongly recommended)

curl -sSL https://raw.githubusercontent.com/iyear/tdl/main/scripts/install.sh | bash
tdl login -n monitor_session

6. First run - complete Telegram auth

python main.py --no-tui
# follow the phone + 2FA prompts once

7. Run

python main.py          # TUI mode (recommended)
python main.py --no-tui # plain CLI

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TUI keybindings

Key	Action
s	Search hits database
h	Browse hits by severity
k	Edit keyword patterns live
c	Clear logs
r	Refresh stats
q	Quit

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Output

File	Description
data/hits.db	SQLite - all hits with scores, severity, dedup flag
data/hits.txt	Human-readable grouped log
data/hits.csv	CSV - easy to pull into Excel / pandas
data/logs/monitor.log	Full run log

Telegram alerts fire for CRITICAL / HIGH / MEDIUM only. LOW is stored silently.

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Notes

• Session files are sensitive - equivalent to a logged-in account. Gitignored, never share.
• Flood limits - FloodWaitError is handled automatically.
• Private channels - your user account must already be a member.