MAR-10211350-1.v2

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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

CISA received one artifact which was a Microsoft Excel Open XML Format spreadsheet file (XLSX) with a protected workbook. The file contains hidden malicious code designed to download and execute a payload onto the victim’s system.

For a downloadable copy of IOCs, see MAR-10211350-1.v2.stix.

Submitted Files (1)

ce108a3810fc2b644ca65c791941f11d0c389f3dea4ba40cf276d5ac6c93d322 (2018_07_16_PO_4500612088_Difma...)

Domains (1)

urlz.fr

IPs (1)

151.106.30.115

ce108a3810fc2b644ca65c791941f11d0c389f3dea4ba40cf276d5ac6c93d322

Tags

CVE-2017-11882droppertrojan

Details

Antivirus

YARA Rules

No matches found.

ssdeep Matches

No matches found.

Relationships

Description

This file is a XLSX spreadsheet file with a protected workbook. The file contains hidden malicious code designed to download and execute a payload onto the victim’s system. Upon opening the XLSX, it attempts to download and execute a payload onto the victim’s system using the Universal Resource Identifier (URI) shortened address “hxxp://urlz.fr/7pMA”.

Displayed below is the original URI from the shortened URI:

--Begin original URI from the shortened URI--
hxxp://151.106.30.115/~winvps/3_com/putty/win32.exe
--End original URI from the shortened URI--

The payload is installed and executed from “%AppData%\Roaming\svchost.exe”.
The payload the malware attempted to download was not available at the time of analysis.

urlz.fr

URLs

• http://urlz.fr/7pMA

HTTP Sessions

• GET /7pMA HTTP/1.1
  Host: urlz.fr
  Connection: keep-alive
  Upgrade-Insecure-Requests: 1
  User-Agent: Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36
  Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8
  Accept-Encoding: gzip, deflate
  Accept-Language: en-US,en;q=0.9
  Cookie: __cfduid=d91fd5e13aae8ae89cb4fee65add758f31541801459
  
  HTTP/1.1 403 Forbidden
  Date: Fri, 09 Nov 2018 22:25:58 GMT
  Content-Type: text/html; charset=UTF-8
  Transfer-Encoding: chunked
  Connection: close
  CF-Chl-Bypass: 1
  Cache-Control: max-age=2
  Expires: Fri, 09 Nov 2018 22:26:00 GMT
  X-Frame-Options: SAMEORIGIN
  Vary: Accept-Encoding
  Server: cloudflare
  CF-RAY: 4773b2c2454c3852-ATL
  Content-Encoding: gzip

Whois

domain:     urlz.fr
status:     ACTIVE
hold:        NO
holder-c:    ANO00-FRNIC
admin-c:     ANO00-FRNIC
tech-c:     OVH5-FRNIC
zone-c:     NFC1-FRNIC
nsl-id:     NSL23278-FRNIC
dsl-id:     SIGN872881-FRNIC
registrar: OVH
Expiry Date: 14/05/2019
created:     14/05/2011
last-update: 21/12/2017
source:     FRNIC

ns-list:     NSL23278-FRNIC
nserver:     igor.ns.cloudflare.com
nserver:     nina.ns.cloudflare.com
source:     FRNIC

ds-list:     SIGN872881-FRNIC
key1-tag:    2371
key1-algo: 13 [ECDSAP256SHA256]
key1-dgst-t: 2 [SHA-256]
key1-dgst: D598F5FD1FDD37838EA09B6166792AE4322364BC2DD319C8783002BDB6BCCC05
source:     FRNIC

registrar: OVH
type:        Isp Option 1
address:     2 Rue Kellermann
address:     59100 ROUBAIX
country:     FR
phone:     +33 8 99 70 17 61
fax-no:     +33 3 20 20 09 58
e-mail:     support@ovh.net
website:     http://www.ovh.com
anonymous: NO
registered: 21/10/1999
source:     FRNIC

nic-hdl:     ANO00-FRNIC
type:        PERSON
contact:     Ano Nymous
remarks:     -------------- WARNING --------------
remarks:     While the registrar knows him/her,
remarks:     this person chose to restrict access
remarks:     to his/her personal data. So PLEASE,
remarks:     don't send emails to Ano Nymous. This
remarks:     address is bogus and there is no hope
remarks:     of a reply.
remarks:     -------------- WARNING --------------
registrar: OVH
changed:     04/06/2018 anonymous@anonymous
anonymous: YES
obsoleted: NO
eligstatus: not identified
reachstatus: not identified
source:     FRNIC

nic-hdl:     ANO00-FRNIC
type:        PERSON
contact:     Ano Nymous
remarks:     -------------- WARNING --------------
remarks:     While the registrar knows him/her,
remarks:     this person chose to restrict access
remarks:     to his/her personal data. So PLEASE,
remarks:     don't send emails to Ano Nymous. This
remarks:     address is bogus and there is no hope
remarks:     of a reply.
remarks:     -------------- WARNING --------------
registrar: OVH
changed:     04/06/2018 anonymous@anonymous
anonymous: YES
obsoleted: NO
eligstatus: not identified
reachstatus: not identified
source:     FRNIC

nic-hdl:     OVH5-FRNIC
type:        ROLE
contact:     OVH NET
address:     OVH
address:     140, quai du Sartel
address:     59100 Roubaix
country:     FR
phone:     +33 8 99 70 17 61
e-mail:     tech@ovh.net
trouble:     Information: http://www.ovh.fr
trouble:     Questions: mailto:tech@ovh.net
trouble:     Spam: mailto:abuse@ovh.net
admin-c:     OK217-FRNIC
tech-c:     OK217-FRNIC
notify:     tech@ovh.net
registrar: OVH
changed:     11/10/2006 tech@ovh.net
anonymous: NO
obsoleted: NO
eligstatus: not identified
reachstatus: not identified
source:     FRNIC

Relationships

Description

The spreadsheet connects to the shortened URI. The domain urlz.fr appears to be a free URL shortening service.

151.106.30.115

Tags

command-and-control

URLs

• http://151.106.30.115/~winvps/3_com/putty/win32.exe

HTTP Sessions

• GET /~winvps/3_com/putty/win32.exe HTTP/1.1
  Host: 151.106.30.115
  Connection: keep-alive
  Upgrade-Insecure-Requests: 1
  User-Agent: Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36
  Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8
  Accept-Encoding: gzip, deflate
  Accept-Language: en-US,en;q=0.9

Whois

IP Location: France Strasbourg Velia.net Internetdienste Gmbh
ASN: AS29066 VELIANET-AS velia.net Internetdienste GmbH, DE (registered May 23, 2003)
Whois Server: whois.ripe.net
IP Address: 151.106.30.115

Whois Server
whois.ripe.net
IP Address
151.106.30.115

inetnum:        151.106.30.0 - 151.106.30.255
netname:        VELIANET-FR-PINETLLC
descr:          Pi NET, LLC
country:        FR
org:            ORG-PNL20-RIPE
admin-c:        PNL16-RIPE
tech-c:         PNL16-RIPE
status:         LEGACY
remarks:        ticket.velia.net 110128
notify:         
mnt-by:         FGK-MNT
created:        2018-04-24T19:17:51Z
last-modified:  2018-04-24T19:17:51Z
source:         RIPE

organisation:   ORG-PNL20-RIPE
org-name:       Pi NET, LLC
org-type:       OTHER
address:        No 74, Tang Thiet Giap, Co Nhue
address:        Tu Liem
address:        100000 Hanoi
address:        Viet Nam
phone:          +84 977471775
e-mail:         
admin-c:        PNL16-RIPE
tech-c:         PNL16-RIPE
abuse-c:        PNL16-RIPE
mnt-ref:        FGK-MNT
mnt-by:         FGK-MNT
created:        2017-09-07T11:08:29Z
last-modified:  2017-09-07T11:08:29Z
source:         RIPE

role:           Pi NET, LLC
address:        No 74, Tang Thiet Giap, Co Nhue
address:        Tu Liem
address:        100000 Hanoi
address:        Viet Nam
phone:          +84 977471775
e-mail:         
nic-hdl:        PNL16-RIPE
mnt-by:         FGK-MNT
created:        2017-09-07T11:08:29Z
last-modified:  2017-09-07T11:08:29Z
source:         RIPE
abuse-mailbox:  

route:          151.106.0.0/19
descr:          velia.net
origin:         AS29066
notify:         
mnt-by:         FGK-MNT
created:        2017-11-03T11:55:17Z
last-modified:  2017-11-03T11:55:17Z
source:         RIPE
 

Relationships

Description

The shortened URI "hxxp://urlz.fr/7pMA" expands to the 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".

• 1-844-Say-CISA
• SayCISA@cisa.dhs.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 1-844-Say-CISA or contact@mail.cisa.dhs.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.