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This 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.us-cert.gov/tlp.

Description

This report contains information obtained from automated analysis and is not intended to be a complete description of the submitted sample. Results may be limited due to the complexity of the samples, or due to the ability of the samples to defend against automated analysis techniques. If additional information is required, please contact the Cybersecurity and Infrastructure Security Agency (CISA) using the information provided at the end of this report.

US-CERT received two malicious RTF documents. When opened, the documents attempt to download a malicious payload associated with the Dridex banking trojan.

For a downloadable copy of IOCs, see MIFR-10121050-1.v2.stix.

Files (2)

7f2a499891a72b9f3b0923be0f9db490463639166b41a15fe3bf5387df660f1c (7f2a499891a72b9f3b0923be0f9db4…)

c98f34e4e87f041c3f19749bbb995bfcd2e3de20c2ba619ea4a0ed616ac1b629 (c98f34e4e87f041c3f19749bbb995b…)

Domains (2)

btt5sxcx90.com

rottastics36w.net

7f2a499891a72b9f3b0923be0f9db490463639166b41a15fe3bf5387df660f1c

Tags

CVE-2017-0199downloaderdroppertrojan

Details

Antivirus

YARA Rules

No matches found.

ssdeep Matches

Relationships

Description

7f2a499891a72b9f3b0923be0f9db490463639166b41a15fe3bf5387df660f1c.bin is a malicious Rich Text Format (RTF) document. When the file is opened it will display an error message to the victim (Screenshot 1) while attempting to download the file, ‘template.doc’ from the domain, rottastics36w.net. The domain did not resolve to an IP address at the time of analysis.

Screenshots

rottastics36w.net

Tags

command-and-control

URLs

• http://rottastics36w.net/template.doc

Whois

Domain name: rottastics36w.net
Registry Domain ID: 77428276_DOMAIN_COM-VRSN
Registrar WHOIS Server: whois.eranet.com
Registrar URL: http://www.tnet.hk/
Update Date: 2017-04-02T16:00:00Z
Creation Date: 2017-04-03T09:14:21Z
Registrar Registration Expiration Date: 2018-04-02T16:00:00Z
Registrar: ERANET INTERNATIONAL LIMITED
Registrar IANA ID: 1868
Registrar Abuse Contact Email: support@eranet.com
Registrar Abuse Contact Phone: +852.35685366
Reseller:    
Domain Status: clientTransferProhibited http://www.icann.org/epp#clientTransferProhibited
Domain Status: clientHold http://www.icann.org/epp#clientHold
Registry Registrant ID:
Registrant Name: Robert Ruthven
Registrant Organization: Gamblin Artists Colors
Registrant Street: 323 SE Division Pl
Registrant City: Portland
Registrant Province/state: OR
Registrant Postal Code: 97202
Registrant Country: US
Registrant Phone: +1.5034359411
Registrant Phone EXT:
Registrant Fax: +1.5034359411
Registrant Fax EXT:
Registrant Email: jenniemarc@mail.com
Registry Admin ID:
Admin Name: Robert Ruthven
Admin Organization: Gamblin Artists Colors
Admin Street: 323 SE Division Pl
Admin City: Portland
Admin Province/state: OR
Admin Postal Code: 97202
Admin Country: US
Admin Phone: +1.5034359411
Admin Phone EXT:
Admin Fax: +1.5034359411
Admin Fax EXT:
Admin Email: jenniemarc@mail.com
Registry Tech ID:
Tech Name: Robert Ruthven
Tech Organization: Gamblin Artists Colors
Tech Street: 323 SE Division Pl
Tech City: Portland
Tech Province/state: OR
Tech Postal Code: 97202
Tech Country: US
Tech Phone: +1.5034359411
Tech Phone EXT:
Tech Fax: +1.5034359411
Tech Fax EXT:
Tech Email: jenniemarc@mail.com

Relationships

Description

When the document, 7f2a499891a72b9f3b0923be0f9db490463639166b41a15fe3bf5387df660f1c.bin is opened an attempt is made to download the file ‘template.doc’ from this domain. The domain does not resolve to an IP address.

c98f34e4e87f041c3f19749bbb995bfcd2e3de20c2ba619ea4a0ed616ac1b629

Tags

CVE-2017-0199downloaderdroppertrojan

Details

Antivirus

YARA Rules

No matches found.

ssdeep Matches

Relationships

Description

c98f34e4e87f041c3f19749bbb995bfcd2e3de20c2ba619ea4a0ed616ac1b629.bin is a malicious Rich Text Format (RTF) document. When the file is opened it will display an error message to the victim (Screenshot 1) while attempting to download the file, ‘template.doc’ from the domain, btt5sxcx90.com. The domain did not resolve to an IP address at the time of analysis.

Screenshots

btt5sxcx90.com

Tags

command-and-control

URLs

• http://btt5sxcx90.com/template.doc

Whois

Domain name: btt5sxcx90.com
Registry Domain ID: 77428276_DOMAIN_COM-VRSN
Registrar WHOIS Server: whois.eranet.com
Registrar URL: http://www.tnet.hk/
Update Date: 2017-04-02T16:00:00Z
Creation Date: 2017-04-03T09:15:33Z
Registrar Registration Expiration Date: 2018-04-02T16:00:00Z
Registrar: ERANET INTERNATIONAL LIMITED
Registrar IANA ID: 1868
Registrar Abuse Contact Email: support@eranet.com
Registrar Abuse Contact Phone: +852.35685366
Reseller:    
Domain Status: clientTransferProhibited http://www.icann.org/epp#clientTransferProhibited
Domain Status: clientHold http://www.icann.org/epp#clientHold
Registry Registrant ID:
Registrant Name: Robert Ruthven
Registrant Organization: Gamblin Artists Colors
Registrant Street: 323 SE Division Pl
Registrant City: Portland
Registrant Province/state: OR
Registrant Postal Code: 97202
Registrant Country: US
Registrant Phone: +1.5034359411
Registrant Phone EXT:
Registrant Fax: +1.5034359411
Registrant Fax EXT:
Registrant Email: jenniemarc@mail.com
Registry Admin ID:
Admin Name: Robert Ruthven
Admin Organization: Gamblin Artists Colors
Admin Street: 323 SE Division Pl
Admin City: Portland
Admin Province/state: OR
Admin Postal Code: 97202
Admin Country: US
Admin Phone: +1.5034359411
Admin Phone EXT:
Admin Fax: +1.5034359411
Admin Fax EXT:
Admin Email: jenniemarc@mail.com
Registry Tech ID:
Tech Name: Robert Ruthven
Tech Organization: Gamblin Artists Colors
Tech Street: 323 SE Division Pl
Tech City: Portland
Tech Province/state: OR
Tech Postal Code: 97202
Tech Country: US
Tech Phone: +1.5034359411
Tech Phone EXT:
Tech Fax: +1.5034359411
Tech Fax EXT:
Tech Email: jenniemarc@mail.com

Relationships

Description

When the document, c98f34e4e87f041c3f19749bbb995bfcd2e3de20c2ba619ea4a0ed616ac1b629.bin is opened an attempt is made to download the file ‘template.doc’ from this domain. The domain does not resolve to an IP address.

CISA 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.

• Maintain up-to-date antivirus signatures and engines.
• Keep operating system patches up-to-date.
• Disable File and Printer sharing services. If these services are required, use strong passwords or Active Directory authentication.
• Restrict users’ ability (permissions) to install and run unwanted software applications. Do not add users to the local administrators group unless required.
• Enforce a strong password policy and implement regular password changes.
• Exercise caution when opening e-mail attachments even if the attachment is expected and the sender appears to be known.
• Enable a personal firewall on agency workstations, configured to deny unsolicited connection requests.
• Disable unnecessary services on agency workstations and servers.
• Scan for and remove suspicious e-mail attachments; ensure the scanned attachment is its “true file type” (i.e., the extension matches the file header).
• Monitor users’ web browsing habits; restrict access to sites with unfavorable content.
• Exercise caution when using removable media (e.g., USB thumb drives, external drives, CDs, etc.).
• Scan all software downloaded from the Internet prior to executing.
• Maintain situational awareness of the latest threats and implement appropriate Access Control Lists (ACLs).

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”.

• 1-888-282-0870
• NCCICCustomerService@us-cert.gov (UNCLASS)
• us-cert@dhs.sgov.gov (SIPRNET)
• us-cert@dhs.ic.gov (JWICS)

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.gov/forms/feedback/

What 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 soc@us-cert.gov.

Can I submit malware to CISA? Malware samples can be submitted via three methods:

• Web: https://malware.us-cert.gov
• E-Mail: submit@malware.us-cert.gov
• FTP: ftp.malware.us-cert.gov (anonymous)

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.us-cert.gov.