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Malicious package

aiogram-msgeffectPyPI

Malicious code in aiogram-msgeffect (PyPI) Remove it immediately and rotate any exposed credentials.

MAL-2025-191674
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
pip uninstall aiogram-msgeffect

What this malware does

Importing the module starts obfuscated code which then look for data related to some Telegram clients and attempt to exfiltrate them

Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.

Campaign: 2025-11-tgeffect

Reasons (based on the campaign):

  • obfuscation

  • target:telegram

  • exfiltration-credentials

Malicious versions

2 flagged
1.1.41.2.1

Indicators of compromise (SHA-256)

41de8b9061c97a329f2c0c212b774e139752834b73fdd5683104f56385965a1a
edd5a99e6d1cebb47e713991f08b50dee4b5bf93ae487f6adc446318ccdba6e7
98351a28d67c948095d0be173cefde8d82e298a8788fb6ad61cc5ffdfc0bf904
08bd452a81a13506c01ddc1ea26c6291567708e60b1498ec105f80c442169064
bdd09ae6ee2f772195d3aec2a7d5e30b94fac0a2e360230ba9c53c78a65f8c5f

Detection & response playbook

Credential / info stealer
  1. Find it

    Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for aiogram-msgeffect (2 malicious versions). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging aiogram-msgeffect across your stack and pipelines.

  2. If you installed it — respond

    aiogram-msgeffect is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.

  3. Did it already run?

    If aiogram-msgeffect was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.

  4. How O3 protects you

    O3 blocks aiogram-msgeffect before install through its supply-chain scanner, and if it has already run, detects and severs the exfiltration or C2 callback at runtime through L7 egress monitoring and eBPF.

Frequently asked questions

No. aiogram-msgeffect on PyPI has been identified as a malicious package (versions 1.1.4, 1.2.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

2025-11-tgeffectRLMA-2025-06549RLUA-2026-00040

References

Credits

  • Kamil Mańkowski (kam193)
  • ReversingLabs · finder

Detect & block this

O3 blocks aiogram-msgeffect-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.

aiogram-msgeffect (PyPI) malicious package — MAL-2025-191674 | O3 Security