MAL-2026-6751: Malicious code in bytekit (PyPI)
The PyPI package 'bytekit' versions 3.4.1 and 3.4.2 are part of a malicious campaign involving the 'procwire' package, which executes harmful code during installation. This campaign uses obfuscation and steganography to hide a URL that downloads and runs a remote executable, likely an infostealer. The malicious executable is executed and then quickly removed, indicating an attempt to evade detection. The 'procwire' package is also a dependency of 'confighub', spreading the malware further through dependencies.
AI Analysis
Technical Summary
The malicious campaign '2026-07-procwire' involves multiple PyPI packages, including 'procwire', 'schemavault', and 'bytekit'. The 'procwire' package overrides the install command in setup.py to execute malicious code during installation. It uses 'schemavault' and 'bytekit' to decode and retrieve a URL hidden via steganography and encoded bytes. This URL points to a remote executable that is downloaded, executed, and then deleted. The executable likely functions as an infostealer and communicates with the domain 030502[.]xyz. The 'bytekit' package (versions 3.4.1 and 3.4.2) implements the decoding mechanism used in this process, making it part of the malicious supply chain.
Potential Impact
Installation of the affected 'bytekit' versions as part of the malicious dependency chain results in execution of a remote payload that likely steals information. The malicious executable runs on the victim's system and contacts an attacker-controlled domain, potentially compromising system confidentiality and integrity. The use of obfuscation and steganography complicates detection and analysis.
Mitigation Recommendations
No official patch or fix is currently available for the affected 'bytekit' versions 3.4.1 and 3.4.2. Users should avoid installing these versions and any packages depending on 'procwire' or 'confighub' until the issue is resolved. Monitor vendor advisories for updates. Since this is a malicious package campaign, removing the affected packages and scanning for indicators of compromise is recommended.
MAL-2026-6751: Malicious code in bytekit (PyPI)
Description
The PyPI package 'bytekit' versions 3.4.1 and 3.4.2 are part of a malicious campaign involving the 'procwire' package, which executes harmful code during installation. This campaign uses obfuscation and steganography to hide a URL that downloads and runs a remote executable, likely an infostealer. The malicious executable is executed and then quickly removed, indicating an attempt to evade detection. The 'procwire' package is also a dependency of 'confighub', spreading the malware further through dependencies.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The malicious campaign '2026-07-procwire' involves multiple PyPI packages, including 'procwire', 'schemavault', and 'bytekit'. The 'procwire' package overrides the install command in setup.py to execute malicious code during installation. It uses 'schemavault' and 'bytekit' to decode and retrieve a URL hidden via steganography and encoded bytes. This URL points to a remote executable that is downloaded, executed, and then deleted. The executable likely functions as an infostealer and communicates with the domain 030502[.]xyz. The 'bytekit' package (versions 3.4.1 and 3.4.2) implements the decoding mechanism used in this process, making it part of the malicious supply chain.
Potential Impact
Installation of the affected 'bytekit' versions as part of the malicious dependency chain results in execution of a remote payload that likely steals information. The malicious executable runs on the victim's system and contacts an attacker-controlled domain, potentially compromising system confidentiality and integrity. The use of obfuscation and steganography complicates detection and analysis.
Mitigation Recommendations
No official patch or fix is currently available for the affected 'bytekit' versions 3.4.1 and 3.4.2. Users should avoid installing these versions and any packages depending on 'procwire' or 'confighub' until the issue is resolved. Monitor vendor advisories for updates. Since this is a malicious package campaign, removing the affected packages and scanning for indicators of compromise is recommended.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- MAL-2026-6751
- Osv Schema Version
- 1.7.4
- Aliases
- []
- Ecosystems
- ["PyPI"]
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a498a8127e9c7971936fdc6
Added to database: 07/04/2026, 22:34:41 UTC
Last enriched: 07/04/2026, 22:40:02 UTC
Last updated: 07/05/2026, 02:51:10 UTC
Views: 3
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