PULSECHECK
PULSECHECK is a web shell written in Perl that was used by APT5 as early as 2020 including against Pulse Secure VPNs at US Defense Industrial Base (DIB) companies.[1]
ID: S1108
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Type: MALWARE
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Platforms: Network, Linux
Version: 1.0
Created: 08 February 2024
Last Modified: 10 April 2024
Techniques Used
| Domain | ID | Name | Use | |
|---|---|---|---|---|
| Enterprise | T1071 | .001 | Application Layer Protocol: Web Protocols |
PULSECHECK can check HTTP request headers for a specific backdoor key and if found will output the result of the command in the variable |
| Enterprise | T1059 | .004 | Command and Scripting Interpreter: Unix Shell |
PULSECHECK can use Unix shell script for command execution.[1] |
| Enterprise | T1132 | .001 | Data Encoding: Standard Encoding |
PULSECHECK can base-64 encode encrypted data sent through C2.[1] |
| Enterprise | T1505 | .003 | Server Software Component: Web Shell |
PULSECHECK is a web shell that can enable command execution on compromised servers.[1] |