MALICIOUS (1) campaign cataloged at 2026-11-01(2).
- The campaign has clearly malicious intent, like infostealers.
- This is just the date of creating the catalog entry. It may not reflect the date of creation of the campaign itself.
2026-11-pystr-codec¶
Package embeds a malicious PTH file that on every Python startup executes obfuscated JavaScript code, using a Bun engine. It then exfiltrates credentials to a public Github repository, establishes persistence awaiting remote commands, attempts spreading using discovered credentials as well as periodically checks if discovered credentials are valid. Once they are invalidated, it performs destructive actions on the local machine. It seems to be part of the Miasma-family worm (also known under testmetest).
Abuse categories¶
abuses-pth
The package uses .pth files, sitecustomize or usercustomize modules to execute malicious code during Python startup, even without importing the package code manually.
backdoor
Campaign uses backdoor.
destructive-actions
Campaign uses destructive-actions.
exfiltration_credentials
The package attempts to steal credentials, like passwords or API keys.
infostealer
Activity is typical for information stealers, i.e. by exfiltrate various sensitive data from the victim's environment.
obfuscation
Code uses obfuscation techniques to hide its true purpose.
persistence
Campaign uses persistence.
worm
Campaign uses worm.
References¶
Referenced resources may include blog posts about the campaign, malware analysis, sandbox reports, or other relevant information.
IoCs & related URLs¶
URLs with payloads, characteristic domains, C&C IPs, repositories with malicious code, etc.
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hxxps://paleasbest.top/v1/api -
paleasbest.top