MAR-10337802-1.v1: DarkSide Ransomware
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. SummaryDescriptionThis Malware Analysis Report (MAR) is the result of analytic efforts by the Cybersecurity and Infrastructure Security Agency (CISA). CISA processed three (3) files associated with a variant of DarkSide ransomware. NOTE: CISA has no evidence that this variant is related to the pipeline incident, referred to in Joint Cybersecurity Advisory AA21-131A: DarkSide Ransomware: Best Practices for Preventing Business Disruption from Ransomware Attacks. Ransomware is designed to encrypt the victim's files to extort and ransom for their recovery. DarkSide is a ransomware-as-a-service (RaaS)--the developers of the ransomware received a share of the proceeds from the cybercriminal actors who deploy it, known as "affiliates." This DarkSide ransomware variant executes a dynamic-link library (DLL) program used to delete Volume Shadow copies available on the system. The malware collects, encrypts, and send system information to the threat actor's command and control (C2) domains and generates a ransom note to the victim. CISA is distributing this MAR, which includes suggested response actions and recommended mitigation techniques, to help network defenders identify and mitigate risks. For a downloadable copy of IOCs, see: MAR-10337802-1.v1.WHITE.stix. Click here for a PDF version of this report. Submitted Files (3)156335b95ba216456f1ac0894b7b9d6ad95404ac7df447940f21646ca0090673 (156335b95ba216456f1ac0894b7b9d...) 3ba456cafcb31e0710626170c3565aae305bc7c32a948a54f0331d0939e0fe8a (045621d9.BMP) f6fba207c71d1f53f82d96a87c25c4fa3c020dca58d9b8a266137f33597a0b0e (README.045621d9.TXT) Domains (2)baroquetees.com rumahsia.com IPs (2)176.103.62.217 99.83.154.118 Findings156335b95ba216456f1ac0894b7b9d6ad95404ac7df447940f21646ca0090673Tagsdownloaderloaderransomwaretrojan Details
Antivirus
YARA RulesNo matches found. ssdeep MatchesNo matches found. PE Metadata
PE Sections
Packers/Compilers/Cryptors
Relationships
DescriptionThis artifact is a 32-bit DLL that is a Darkside ransomware variant. The program is called ‘encryptor2.dll’. When it is executed, it will invoke the Volume Shadow service (vssvc.exe) to delete any Volume Shadow copies available on the system. The malware collects information on the system to include the operating system, default language, username, hostname, domain, and operating system (OS) architecture. This information is encrypted and sent to one of the following command-and-control (C2) domains: ---Begin C2 Domains--- The malware reads the system GUID and uses the value to generate a unique eight character hexadecimal extension that it appends to the encrypted files. This extension is also used as the name of the running service the program uses to encrypt the user’s data. ---Begin Service Example--- This variant of the malware contains a hard-coded key ‘_M8607761bf3212d6’ that it uses to decrypt an embedded base64 encoded configuration that runs the ransomware program. The program is configured to avoid encrypting any files located in directories that contain the following strings: ---Begin Avoided Directories--- Any files with the following extensions will not be encrypted: ---Begin File Extensions--- Before the encryption routine starts, the program will check to determine if any of the following processes are running, and shut them down: ---Begin Running Processes--- The following services will also be terminated: ---Begin Terminated Services--- After the encryption routine runs, a bitmap image file is created in the path C:\ProgramData with the same name as the encryption extension, e.g. ‘045621d9.BMP’. The following registry keys are created that generate a ransom note wallpaper on the user’s desktop: ---Begin Wallpaper Registry Keys--- The .BMP file contains instructions to the victim for recovering data (Figure 1). In each directory that the program has encrypted files, a ransom note is dropped with the naming format ‘README.<UniqueID>.TXT’. The file contains instructions for the victim to follow to recover files. The following is an example of the recovery instructions: ---Begin Recovery Instructions--- ----------- [ Welcome to DarkSide ] -------------> What happend? What guarantees? How to get access on website? When you open our website, put the following data in the input form: 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 !!! DANGER !!! ---End Recovery Instructions--- Screenshots Figure 1. - baroquetees.comTagscommand-and-control Ports
WhoisDomain Name: BAROQUETEES.COM Domain name: baroquetees.com Relationships
DescriptionThe ransomware collects system information and sends it to this domain. 176.103.62.217Tagscommand-and-control Relationships
DescriptionAt the time of analysis the domain baroquetees[.]com resolved to this Internet protocol (IP) address. rumahsia.comTagscommand-and-control WhoisDomain Name: RUMAHSIA.COM Domain name: rumahsia.com Relationships
DescriptionThe ransomware collects system information and sends it to this domain. 99.83.154.118Tagscommand-and-control Relationships
DescriptionAt the time of analysis the domain rumahsia[.]com resolved to this IP address. 3ba456cafcb31e0710626170c3565aae305bc7c32a948a54f0331d0939e0fe8aTagsransomware Details
AntivirusNo matches found. YARA RulesNo matches found. ssdeep MatchesNo matches found. Relationships
DescriptionThis bitmap image is the wallpaper used by the ransomware. f6fba207c71d1f53f82d96a87c25c4fa3c020dca58d9b8a266137f33597a0b0eTagsransomwaretrojan Details
Antivirus
YARA RulesNo matches found. ssdeep MatchesNo matches found. Relationships
DescriptionThis is the ransom note created by the Darkside ransomware variant. The note contains the .onion address and the preshared key to be sent to decrypt one file for free. Screenshots Figure 2. - Relationship Summary
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. |
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TLP: WHITE |
Revisions
July 8, 2021: Initital Version
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