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Java Chains

Java-Chains is a Java payload generation platform for security researchers. Its web interface supports common Java payload generation and JNDI, FakeMySQL, and JRMP testing.

Standing on the shoulders of giants

Quick start

Docs: https://java-chains.github.io/en/docs/guide

Plugin development reference: https://github.com/Java-Chains/chains-plugin-demo

Docker Compose

# Extract the release package and place its chains-config directory next to docker-compose.yml
# If chains-config is empty, the container will start but cannot access the image's bundled configuration and plugins
docker compose up -d
# After startup, find the login credentials on the "Auth" line in the logs
docker logs -f java-chains | grep -i auth

Open http://your-ip:8011

Docker run

docker run -d \
  --name java-chains \
  --restart=unless-stopped \
  -p 8011:8011 \
  -p 58080:58080 \
  -p 50389:50389 \
  -p 50388:50388 \
  -p 3308:3308 \
  -p 13999:13999 \
  -p 50000:50000 \
  -p 11527:11527 \
  -e CHAINS_AUTH=true \
  -e CHAINS_PASS= \
  javachains/javachains:2.0.0-beta7

Empty CHAINS_PASS → a random password is generated at startup (see the Auth line in logs).
CHAINS_AUTH=false also requires CHAINS_ALLOW_AUTH_DISABLED=true (explicit acknowledgement).

Jar

Requires OpenJDK / Temurin / Zulu JDK 8 (Oracle JDK 8 is not recommended for BCEL chains).

tar -xzf java-chains-2.0.0-beta7.tar.gz
cd java-chains-2.0.0-beta7   # or unpack layout with java-chains.jar + chains-config/
java -jar java-chains.jar

References and acknowledgments

For personal research and learning only. Never use for illegal activity.

The developers, providers and maintainers are not responsible for actions or consequences of using this tool; users assume all risk.

Acknowledgments:

• https://github.com/ReaJason/MemShellParty
• https://github.com/wh1t3p1g/ysomap
• https://github.com/qi4L/JYso
• https://github.com/X1r0z/JNDIMap
• https://github.com/Whoopsunix/PPPYSO
• https://github.com/jar-analyzer/class-obf
• https://github.com/4ra1n/mysql-fake-server
• https://github.com/mbechler/marshalsec
• https://github.com/frohoff/ysoserial
• https://github.com/H4cking2theGate/ysogate
• https://github.com/Bl0omZ/JNDIEXP
• https://github.com/kezibei/Urldns
• https://github.com/rebeyond/JNDInjector
• https://github.dev/LxxxSec/CTF-Java-Gadget
• https://github.com/pen4uin/java-memshell-generator
• https://github.com/pen4uin/java-echo-generator
• https://github.com/NickstaDB/SerializationDumper
• https://xz.aliyun.com/t/5381
• http://rui0.cn/archives/1408

Communication

If you have any questions, please open an issue or join Discord.

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