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FRAMESTING

FRAMESTING is a Python web shell that was used during Cutting Edge to embed into an Ivanti Connect Secure Python package for command execution.[1]

ID: S1120
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Type: MALWARE
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Platforms: Network
Version: 1.0
Created: 08 March 2024
Last Modified: 08 March 2024
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Enterprise Layer
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Techniques Used

Domain ID Name Use
Enterprise T1071 .001 Application Layer Protocol: Web Protocols

FRAMESTING can retrieve C2 commands from values stored in the DSID cookie from the current HTTP request or from decompressed zlib data within the request's POST data.[1]
Enterprise T1059 .006 Command and Scripting Interpreter: Python

FRAMESTING is a Python web shell that can embed in the Ivanti Connect Secure CAV Python package.[1]
Enterprise T1554 Compromise Host Software Binary

FRAMESTING can embed itself in the CAV Python package of an Ivanti Connect Secure VPN located in /home/venv3/lib/python3.6/site-packages/cav-0.1-py3.6.egg/cav/api/resources/category.py.[1]
Enterprise T1001 Data Obfuscation

FRAMESTING can send and receive zlib compressed data within POST requests.[1]
.003 Protocol or Service Impersonation

FRAMESTING uses a cookie named DSID to mimic the name of a cookie used by Ivanti Connect Secure appliances for maintaining VPN sessions.[1]
Enterprise T1140 Deobfuscate/Decode Files or Information

FRAMESTING can decompress data received within POST requests.[1]
Enterprise T1505 .003 Server Software Component: Web Shell

FRAMESTING is a web shell capable of enabling arbitrary command execution on compromised Ivanti Connect Secure VPNs.[1]

Campaigns

ID Name Description
C0029 Cutting Edge

[1]

References

  1. Lin, M. et al. (2024, January 31). Cutting Edge, Part 2: Investigating Ivanti Connect Secure VPN Zero-Day Exploitation. Retrieved February 27, 2024.