Malware Analysis Report (AR20-133E)

MAR-10211350-1.v2

 

Notification

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.

Summary

Description

NCCIC 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

Findings

ce108a3810fc2b644ca65c791941f11d0c389f3dea4ba40cf276d5ac6c93d322

Tags

CVE-2017-11882droppertrojan

Details
Name 2018_07_16_PO_4500612088_Difmal_.xlsx
Size 48344 bytes
Type CDFV2 Encrypted
MD5 3eae562fd6a0232eb874914364b6ca8a
SHA1 b704762f817556f82a6addc3f11a45089d92ba18
SHA256 ce108a3810fc2b644ca65c791941f11d0c389f3dea4ba40cf276d5ac6c93d322
SHA512 4119a3ce3032c937a2a4c5c95c786a25c0bbba6ad44593eeb71546d0097fcf1052d39c3a9e5fcbcf53fdfb87a3e18603f8741d304fab927ed717f3eb98eb49aa
ssdeep 768:gj16EyKQ09a/kk9mqmBsUN/KMXXSpdiZBVJeUXXXnu7UJHdJ7JNU:7Ua/Qs3wwlEHdlJNU
Entropy 7.714565
Antivirus
BitDefender Trojan.Agent.DBOV
ClamAV Doc.Dropper.Agent-6614040-0
ESET Win32/Exploit.Agent.LS trojan
Emsisoft Trojan.Agent.DBOV (B)
Ikarus Trojan.Office.Doc
McAfee RDN/Generic Exploit
Microsoft Security Essentials Exploit:O97M/CVE-2017-11882
NetGate Exploit.Win32.Agent
Sophos Exp/20180802-B
Symantec Trojan.Mdropper
TACHYON Suspicious/W97.CVE-2017-11882
TrendMicro TROJ_FR.1405EAFC
TrendMicro House Call TROJ_FR.1405EAFC
YARA Rules

No matches found.

ssdeep Matches

No matches found.

Relationships
ce108a3810... Connected_To urlz.fr
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
urlz.fr Connected_From ce108a3810fc2b644ca65c791941f11d0c389f3dea4ba40cf276d5ac6c93d322
urlz.fr Related_To 151.106.30.115
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
151.106.30.115 Related_To urlz.fr
Description

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

Relationship Summary

ce108a3810... Connected_To urlz.fr
urlz.fr Connected_From ce108a3810fc2b644ca65c791941f11d0c389f3dea4ba40cf276d5ac6c93d322
urlz.fr Related_To 151.106.30.115
151.106.30.115 Related_To urlz.fr

Recommendations

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".

Contact Information

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Document FAQ

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:

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.

Revisions

May 12, 2020: Initial Version

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