MAR-10338868-1.v1: Pulse Connect Secure
Summary
body#cma-body {
font-family: Franklin Gothic Medium, Franklin Gothic, ITC Franklin Gothic, Arial, sans-serif;
font-size: 15px;
}
table#cma-table {
width: 900px;
margin: 2px;
table-layout: fixed;
border-collapse: collapse;
}
div#cma-exercise {
width: 900px;
height: 30px;
text-align: center;
line-height: 30px;
font-weight: bold;
font-size: 18px;
}
div.cma-header {
text-align: center;
margin-bottom: 40px;
}
div.cma-footer {
text-align: center;
margin-top: 20px;
}
h2.cma-tlp {
background-color: #000;
color: #ffffff;
width: 180px;
height: 30px;
text-align: center;
line-height: 30px;
font-weight: bold;
font-size: 18px;
float: right;
}
span.cma-fouo {
line-height: 30px;
font-weight: bold;
font-size: 16px;
}
h3.cma-section-title {
font-size: 18px;
font-weight: bold;
padding: 0 10px;
margin-top: 10px;
}
h4.cma-object-title {
font-size: 16px;
font-weight: bold;
margin-left: 20px;
}
h5.cma-data-title {
padding: 3px 0 3px 10px;
margin: 10px 0 0 20px;
background-color: #e7eef4;
font-size: 15px;
}
p.cma-text {
margin: 5px 0 0 25px !important;
word-wrap: break-word !important;
}
div.cma-section {
border-bottom: 5px solid #aaa;
margin: 5px 0;
padding-bottom: 10px;
}
div.cma-avoid-page-break {
page-break-inside: avoid;
}
div#cma-summary {
page-break-after: always;
}
div#cma-faq {
page-break-after: always;
}
table.cma-content {
border-collapse: collapse;
margin-left: 20px;
}
table.cma-hashes {
table-layout: fixed;
width: 880px;
}
table.cma-hashes td{
width: 780px;
word-wrap: break-word;
}
.cma-left th {
text-align: right;
vertical-align: top;
padding: 3px 8px 3px 20px;
background-color: #f0f0f0;
border-right: 1px solid #aaa;
}
.cma-left td {
padding-left: 8px;
}
.cma-color-title th, .cma-color-list th, .cma-color-title-only th {
text-align: left;
padding: 3px 0 3px 20px;
background-color: #f0f0f0;
}
.cma-color-title td, .cma-color-list td, .cma-color-title-only td {
padding: 3px 20px;
}
.cma-color-title tr:nth-child(odd) {
background-color: #f0f0f0;
}
.cma-color-list tr:nth-child(even) {
background-color: #f0f0f0;
}
td.cma-relationship {
max-width: 310px;
word-wrap: break-word;
}
ul.cma-ul {
margin: 5px 0 10px 0;
}
ul.cma-ul li {
line-height: 20px;
margin-bottom: 5px;
word-wrap: break-word;
}
#cma-survey {
font-weight: bold;
font-style: italic;
}
div.cma-banner-container {
position: relative;
text-align: center;
color: white;
}
img.cma-banner {
max-width: 900px;
height: auto;
}
img.cma-nccic-logo {
max-height: 60px;
width: auto;
float: left;
margin-top: -15px;
}
div.cma-report-name {
position: absolute;
bottom: 32px;
left: 12px;
font-size: 20px;
}
div.cma-report-number {
position: absolute;
bottom: 70px;
right: 100px;
font-size: 18px;
}
div.cma-report-date {
position: absolute;
bottom: 32px;
right: 100px;
font-size: 18px;
}
img.cma-thumbnail {
max-height: 100px;
width: auto;
vertical-align: top;
}
img.cma-screenshot {
margin: 10px 0 0 25px;
max-width: 800px;
height: auto;
vertical-align: top;
border: 1px solid #000;
}
div.cma-screenshot-text {
margin: 10px 0 0 25px;
}
.cma-break-word {
word-wrap: break-word;
}
.cma-tag {
border-radius: 5px;
padding: 1px 10px;
margin-right: 10px;
}
.cma-tag-info {
background: #f0f0f0;
}
.cma-tag-warning {
background: #ffdead;
}
NotificationThis report is provided "as is" for informational purposes only. The Department of Homeland Security (DHS) does not provide any warranties of any kind regarding any information contained herein. The DHS does not endorse any commercial product or service referenced in this bulletin or otherwise. This document is marked TLP:WHITE--Disclosure is not limited. Sources may use TLP:WHITE when information carries minimal or no foreseeable risk of misuse, in accordance with applicable rules and procedures for public release. Subject to standard copyright rules, TLP:WHITE information may be distributed without restriction. For more information on the Traffic Light Protocol (TLP), see http://www.cisa.gov/tlp. SummaryDescriptionThree files were submitted to CISA for analysis. One file consists of shell scripts designed to modify a Pulse Secure Perl Common Gateway Interface (CGI) script file to become a webshell. The other files are capable of allowing a remote operator to read and write files on the target system. This analysis is derived from malicious files found on Pulse Connect Secure devices. For a downloadable copy of IOCs, see: MAR-10338868-1.v1.WHITE.stix. Submitted Files (3)44a8b2187c8d181a73285379b4566ed9d39d4ed208d633dcd0dda67a0a64e2a4 (licenseserverproto.cgi) 85f74424fb4c7dba9f2e9c60a95c8a226a97f7dfc277f5ce6f34862a9f500226 (healthcheck.cgi) a3b60b4bc4a5c7af525491ba37b570f90405aa83e36655da7d91bd68acaedf85 (DSUpgrade.pm) Findingsa3b60b4bc4a5c7af525491ba37b570f90405aa83e36655da7d91bd68acaedf85Tagstrojanwebshell Details
Antivirus
YARA RulesNo matches found. ssdeep Matches
DescriptionThe file contains malicious code that was patched into the Pulse Secure application. --Begin Malicious Code-- return $status == 0; The patched in code will leverage the following SED command to patch a malicious webshell into the Pulse Secure system file “/pkg/do-install”: --Begin Malicious SED Command-- The purpose of the webshell is to accept a parameter named "id" from within an incoming web application post, and also copy another instance of the shell into the parameter '$cgi_p', which resolves to the legitimate file 'licenseserverproto.cgi'. The webshell will then process the data provided within the "id" parameter as an operating system command by executing it locally utilizing the system() function. 85f74424fb4c7dba9f2e9c60a95c8a226a97f7dfc277f5ce6f34862a9f500226Tagswebshell Details
Antivirus
YARA RulesNo matches found. ssdeep MatchesNo matches found. DescriptionThis file is a Pulse Secure CGI script that contains malicious code that was patched into the file. The modification modifies the file to become a webshell. The following code includes comments that provides information on the capabilities of this patched webshell: --Begin Malicious Code-- The webshell is capable of allowing a remote operator to read and write files on the target system. It is also capable of allowing the remote operator to pass system commands to the target system which will be executed as system commands. The data passed to and from this webshell by the remote operator will be RC4 encrypted with a hard coded RC4 key. 44a8b2187c8d181a73285379b4566ed9d39d4ed208d633dcd0dda67a0a64e2a4Tagswebshell Details
Antivirus
YARA RulesNo matches found. ssdeep MatchesNo matches found. DescriptionThis file is a Pulse Secure CGI script with malicious code patched in. This file and "healthcheck.cgi" (85f74424fb4c7dba9f2e9c60a95c8a226a97f7dfc277f5ce6f34862a9f500226) have the same malicious code patched in. This file contains a different hard-coded RC4 key for encryption. RecommendationsCISA recommends that users and administrators consider using the following best practices to strengthen the security posture of their organization's systems. Any configuration changes should be reviewed by system owners and administrators prior to implementation to avoid unwanted impacts.
Additional information on malware incident prevention and handling can be found in National Institute of Standards and Technology (NIST) Special Publication 800-83, "Guide to Malware Incident Prevention & Handling for Desktops and Laptops". Contact Information
CISA continuously strives to improve its products and services. You can help by answering a very short series of questions about this product at the following URL: https://us-cert.cisa.gov/forms/feedback/ Document FAQWhat is a MIFR? A Malware Initial Findings Report (MIFR) is intended to provide organizations with malware analysis in a timely manner. In most instances this report will provide initial indicators for computer and network defense. To request additional analysis, please contact CISA and provide information regarding the level of desired analysis. What is a MAR? A Malware Analysis Report (MAR) is intended to provide organizations with more detailed malware analysis acquired via manual reverse engineering. To request additional analysis, please contact CISA and provide information regarding the level of desired analysis. Can I edit this document? This document is not to be edited in any way by recipients. All comments or questions related to this document should be directed to the CISA at 1-888-282-0870 or CISA Service Desk. Can I submit malware to CISA? Malware samples can be submitted via three methods:
CISA encourages you to report any suspicious activity, including cybersecurity incidents, possible malicious code, software vulnerabilities, and phishing-related scams. Reporting forms can be found on CISA's homepage at www.cisa.gov. |
Revisions
July 21, 2021: Initial Version