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analyzing-cryptominer-malware

Analyzes cryptojacking/coinminer malware by extracting mining pool endpoints (stratum), wallet addresses, algorithm and miner identifiers (XMRig and forks), and persistence or resource-control settings from static strings and config. Activates for requests to analyze a cryptominer, extract mining pool and wallet IOCs, or identify coinminer configuration.

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See how to install

Files included (4)

  • SKILL.md2.7 KB
  • LICENSE340 B
  • references/api-reference.md1.3 KB
  • scripts/analyst.py2.5 KB

SKILL.md (original)

Review the instructions the agent will receive before you install.

Analyzing Cryptominer Malware

When to Use

  • You have a suspected coinminer (often an XMRig fork) and need to extract its pool, wallet, algorithm, and resource-control configuration for IOCs and attribution.
  • You are confirming a host's high CPU/GPU usage is malicious mining.

Do not use this to run the miner — extract its configuration statically.

Prerequisites

  • The miner sample or its extracted config/strings, read inertly.

Safety & Handling

  • Read bytes statically; defang pool endpoints; never start the miner.

Workflow

Step 1: Extract mining configuration

python scripts/analyst.py profile sample.bin

Extracts stratum+tcp:///stratum+ssl:// pool URLs, wallet addresses (Monero and common formats), algorithm names (rx/0, cn/r, etc.), and the XMRig/miner identifier strings.

Step 2: Identify resource and stealth controls

Surface max-cpu-usage, --background, idle-detection, and donate-level settings, plus watchdog/persistence indicators.

Step 3: Build IOCs

Record defanged pool endpoints, wallet addresses, and the miner family for detection and takedown referral.

Step 4: Document

Summarize the campaign's pool/wallet and the resource-control posture.

Validation

  • Pool URLs use a recognized stratum scheme and resolve to plausible hosts.
  • Wallet addresses match a known coin's format/length.
  • The miner family is identified from its config keys/strings.

Pitfalls

  • Legitimate mining software shares the same config keys — context (deployment, stealth) matters.
  • Encrypted/packed config requiring decryption first.
  • Proxy pools masking the true upstream pool.

References

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