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Malicious package

NBitcoin.Mono.CoreNuGet

Malicious code in NBitcoin.Mono.Core (NuGet) Remove it immediately and rotate any exposed credentials.

MAL-2024-4565
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
remove NBitcoin.Mono.Core

Malicious versions

3 flagged
3.0.0.463.0.13.0.3

Indicators of compromise (SHA-256)

fafb7b2503ff5d34a5d2cab182cd76224eb37d0baa95f669eaad25761d05ef9f

Detection & response playbook

Malicious package
  1. Find it

    Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for NBitcoin.Mono.Core (3 malicious versions). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging NBitcoin.Mono.Core across your stack and pipelines.

  2. If you installed it — respond

    Remove NBitcoin.Mono.Core from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.

  3. Did it already run?

    If NBitcoin.Mono.Core 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 NBitcoin.Mono.Core 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. NBitcoin.Mono.Core on NuGet has been identified as a malicious package (versions 3.0.0.46, 3.0.1, 3.0.3 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2024-03354

Credits

  • ReversingLabs · finder

Detect & block this

O3 blocks NBitcoin.Mono.Core-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.

NBitcoin.Mono.Core (NuGet) malicious package — MAL-2024-4565 | O3 Security