Learn How to Thwart Cyber Attackers with Training in San Antonio. Save $200 thru 4/24.

Newsletters: @RISK

Subscribe to SANS Newsletters

Join the SANS Community to receive the latest curated cyber security news, vulnerabilities and mitigations, training opportunities, and our webcast schedule.

SANS NewsBites
@Risk: Security Alert
OUCH! Security Awareness
Case Leads DFIR Digest
Industrial Control Systems
Industrials & Infrastructure

@RISK provides a reliable weekly summary of (1) newly discovered attack vectors, (2) vulnerabilities with active new exploits, (3) insightful explanations of how recent attacks worked, and other valuable data

A key purpose of the @RISK is to provide the data that will ensure that the 20 Critical Controls (the US and UK benchmark for effective protection of networked systems) continue to be the most effective defenses for all known attack vectors. But since it is also valuable for security practitioners, SANS is making it available to the 145,000 security practitioners who have completed SANS security training and others at their organizations who hope to stay current with the offensive methods in use.

May 18, 2017

@RISK: The Consensus Security Vulnerability Alert

Vol. 17, Num. 20

Providing a reliable, weekly summary of newly discovered attack vectors, vulnerabilities with active exploits, and explanations of how recent attacks worked

Archived issues may be found at http://www.sans.org/newsletters/at-risk



MOST PREVALENT MALWARE FILES 2017-05-09 - 2017-05-16


TOP VULNERABILITY THIS WEEK: WannaCry Ransomware Compromises Hosts Around The World Via Worm-like Activity

******************** Sponsored By Splunk ********************

WhatWorks Webcast: Join SANS Director of Emerging Security Trends John Pescatore and Ryan Niemes, Lead Security Analyst at Illumina, who will share details on the selection, deployment and experience using Splunk Enterprise Security and Splunk Cloud. Hear about lessons learned and best practices as well as detail the metrics used to demonstrate the value of Splunk. http://www.sans.org/info/194865



-- SANS San Francisco Summer 2017 | June 5-10 |

-- SANS Security Operations Center Summit & Training | Washington, DC | June 5-12 |
Build more effective security operations. Two days of in-depth Summit talks, 5 SANS courses, exclusive networking opportunities, & more!

-- SANS Secure Europe 2017 | Amsterdam, NL | June 12-20 |

-- Digital Forensics & Incident Response Summit & Training | Austin, TX | June 22-29 |
Two days of in-depth Summit talks, 9 SANS courses, DFIR NetWars, Night Out in Austin!, and @Night talks! http://www.sans.org/u/ryX

-- SANS Cyber Defence Canberra 2017 | June 26-July 8 |

-- SANS London July 2017 | July 3-8 |

-- SANS Cyber Defence Singapore | July 10-15 |

-- SANSFIRE 2017 | Washington, DC | July 22-29 |

-- SANS Network Security | Las Vegas, NV | September 10-17 |

-- Can't travel? SANS offers LIVE online instruction. Day (Simulcast - http://www.sans.org/u/WK) and Evening (vLive - http://www.sans.org/u/WZ) courses available!

-- SANS Online Training: Special Offer! Register by May 10 and receive a new iPad, Samsung Galaxy Tab A or take $350 off your OnDemand or vLive Course!

-- OnDemand http://www.sans.org/u/pS9

-- vLive http://www.sans.org/u/pSj

-- Multi-week Live SANS training
Mentor - http://www.sans.org/u/X9
Contact mentor@sans.org

-- Looking for training in your own community?
Community - http://www.sans.org/u/Xo

-- SANS OnDemand lets you train anytime, anywhere with four months of online access to your course. Learn more: http://www.sans.org/u/XD

Plus Brussels, San Francisco, Arlington, and Dubai all in the next 90 days.
For a list of all upcoming events, on-line and live: http://www.sans.org/u/XN

********************** Sponsored Links: ********************

1) SANS Finance Briefing: Practical Threat Modeling For Financial Organizations - Free to the Financial Cybersecurity Community. Learn More: http://www.sans.org/info/194870

2) Cybereason explains the Kovter fileless malware and its variants and present techniques organization can use to hunt, detect, and respond to these attacks. Register: http://www.sans.org/info/194875

3) Register for "Choosing the Right Path to Application Security" and be among the first to receive access to the associated whitepaper. http://www.sans.org/info/194880



Title: WannaCry Ransomware Compromises Hosts Around The World Via Worm-like Activity
Description: A major ransomware variant known as 'WannaCry' has compromised a large number of hosts around the world in a worm-like manner. WannaCry leverages tools and exploits leaked by the Shadow Brokers to exploit SMBv1 vulnerabilities patched by MS17-010. Damage appears to have been mitigated due to a "kill switch" domain being registered and thus, causing the malware to limit self propagation. Organizations should patch any vulnerable systems as well as block all inbound SMB traffic.
Reference: http://blog.talosintelligence.com/2017/05/wannacry.html?f_l=s
Snort SID: 41978, 42329-42332

Title: Apple Releases Security Updates; Addresses Flaws Demoed at Pwn2Own
Description: Apple has releases security updates for macOS, iOS, watchOS, tvOS, as well as Safari, iTunes, and iCloud for Windows. These updates resolve 66 vulnerabilities, many of which were demonstrated at the annual Pwn2Own hacking contest. Eleven of the vulnerabilities addressed in iOS could have led to arbitrary code execution via various methods.
Reference: https://support.apple.com/en-us/HT201222
Snort SID: Detection pending release of vulnerability information



Microsoft Releases Security Updates for Out-of-Support Windows XP, Server 2003, and 8 in Response to WannaCry

ShadowBrokers Planning Monthly Exploit, Data Dump Service

OpenVPN 2.4 Evaluation Summary and Report

Breach at DocuSign Led to Targeted Email Malware Campaign

Exploiting the Linux kernel via packet sockets



This is a list of recent vulnerabilities for which exploits are available. System administrators can use this list to help in prioritization of their remediation activities. The Qualys Vulnerability Research Team compiles this information based on various exploit frameworks, exploit databases, exploit kits and monitoring of internet activity.

ID: CVE-2017-0145
Title: Microsoft Windows SMB Remote Code Execution Vulnerability
Vendor: Microsoft
Description: The SMBv1 server in Microsoft Windows Vista SP2; Windows Server 2008 SP2 and R2 SP1; Windows 7 SP1; Windows 8.1; Windows Server 2012 Gold and R2; Windows RT 8.1; and Windows 10 Gold, 1511, and 1607; and Windows Server 2016 allows remote attackers to execute arbitrary code via crafted packets, aka "Windows SMB Remote Code Execution Vulnerability." This vulnerability is different from those described in CVE-2017-0143, CVE-2017-0144, CVE-2017-0146, and CVE-2017-0148.
CVSS v2 Base Score: 10.0 (AV:N/AC:L/Au:N/C:C/I:C/A:C)

ID: CVE-2017-0290
Title: Microsoft Malware Protection Engine Remote Code Execution Vulnerability
Vendor: Microsoft
Description: NScript in mpengine in Microsoft Malware Protection Engine with Engine Version before 1.1.13704.0, as used in Windows Defender and other products, allows remote attackers to execute arbitrary code or cause a denial of service (type confusion and application crash) via crafted JavaScript code within any file scanned by this engine.
CVSS v2 Base Score: 10.0 (AV:N/AC:L/Au:N/C:C/I:C/A:C)

ID: CVE-2017-3881
Title: Cisco IOS and IOS XE Software Cluster Management Protocol Remote Code Execution Vulnerability
Vendor: Cisco
Description: A vulnerability in the Cisco Cluster Management Protocol (CMP) processing code in Cisco IOS and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a reload of an affected device or remotely execute code with elevated privileges. The Cluster Management Protocol utilizes Telnet internally as a signaling and command protocol between cluster members. The vulnerability is due to the combination of two factors: (1) the failure to restrict the use of CMP-specific Telnet options only to internal, local communications between cluster members and instead accept and process such options over any Telnet connection to an affected device; and (2) the incorrect processing of malformed CMP-specific Telnet options. An attacker could exploit this vulnerability by sending malformed CMP-specific Telnet options while establishing a Telnet session with an affected Cisco device configured to accept Telnet connections. An exploit could allow an attacker to execute arbitrary code and obtain full control of the device or cause a reload of the affected device. This affects Catalyst switches, Embedded Service 2020 switches, Enhanced Layer 2 EtherSwitch Service Module, Enhanced Layer 2/3 EtherSwitch Service Module, Gigabit Ethernet Switch Module (CGESM) for HP, IE Industrial Ethernet switches, ME 4924-10GE switch, RF Gateway 10, and SM-X Layer 2/3 EtherSwitch Service Module. Cisco Bug IDs: CSCvd48893.
CVSS v2 Base Score: 10.0 (AV:N/AC:L/Au:N/C:C/I:C/A:C)

ID: CVE-2017-7269
Title: Microsoft IIS 6.0 ScStoragePathFromUrl Buffer Overflow Vulnerability
Vendor: Microsoft
Description: Buffer overflow in the ScStoragePathFromUrl function in the WebDAV service in Internet Information Services (IIS) 6.0 in Microsoft Windows Server 2003 R2 allows remote attackers to execute arbitrary code via a long header beginning with "If: http://" in a PROPFIND request, as exploited in the wild in July or August 2016.
CVSS v2 Base Score: 10.0 (AV:N/AC:L/Au:N/C:C/I:C/A:C)

ID: CVE-2017-5638
Title: Apache Struts2 Input Validation Code Execution Vulnerability
Vendor: Apache
Description: The Jakarta Multipart parser in Apache Struts 2 2.3.x before 2.3.32 and 2.5.x before mishandles file upload, which allows remote attackers to execute arbitrary commands via a #cmd= string in a crafted Content-Type http header, as exploited in the wild in March 2017.
CVSS v2 Base Score: 10.0 (AV:N/AC:L/Au:N/C:C/I:C/A:C)

ID: CVE-2017-3823
Title: Cisco WebEx Google Chrome Extension Remote Code Execution Vulnerability
Vendor: Cisco
Description: An issue was discovered in the Cisco WebEx Extension before 1.0.7 on Google Chrome, the ActiveTouch General Plugin Container before 106 on Mozilla Firefox, the GpcContainer Class ActiveX control plugin before 10031.6.2017.0126 on Internet Explorer, and the Download Manager ActiveX control plugin before on Internet Explorer. A vulnerability in these Cisco WebEx browser extensions could allow an unauthenticated, remote attacker to execute arbitrary code with the privileges of the affected browser on an affected system. This vulnerability affects the browser extensions for Cisco WebEx Meetings Server and Cisco WebEx Centers (Meeting Center, Event Center, Training Center, and Support Center) when they are running on Microsoft Windows. The vulnerability is a design defect in an application programing interface (API) response parser within the extension. An attacker that can convince an affected user to visit an attacker-controlled web page or follow an attacker-supplied link with an affected browser could exploit the vulnerability. If successful, the attacker could execute arbitrary code with the privileges of the affected browser.
CVSS v2 Base Score: 9.3 (AV:N/AC:M/Au:N/C:C/I:C/A:C)

ID: CVE-2016-7892
Title: Adobe Flash Player Use-After-Free Code Execution Vulnerability
Vendor: Adobe
Description: Remote exploitation of a use-after-free vulnerability in Adobe's Flash Player could allow attackers to execute arbitrary code. Adobe is aware of a report that an exploit for CVE-2016-7892 exists in the wild, and is being used in limited targeted attacks.
CVSS v2 Base Score: 9.3 (AV:N/AC:M/Au:N/C:C/I:C/A:C)

ID: CVE-2016-6366
Title: Cisco Adaptive Security Appliance SNMP Buffer Overflow Code Execution Vulnerability
Vendor: Cisco
Description: Buffer overflow in Cisco Adaptive Security Appliance (ASA) Software through on ASA 5500, ASA 5500-X, ASA Services Module, ASA 1000V, ASAv, Firepower 9300 ASA Security Module, PIX, and FWSM devices allows remote authenticated users to execute arbitrary code via crafted IPv4 SNMP packets, aka Bug ID CSCva92151 or EXTRABACON.
CVSS v2 Base Score: 8.5 (AV:N/AC:M/Au:S/C:C/I:C/A:C)



SHA 256: 24d004a104d4d54034dbcffc2a4b19a11f39008a575aa614ea04703480b1022c
MD5: db349b97c37d22f5ea1d1841e3c89eb4
Typical Filename: mssecsvc.exe
Claimed Product: Microsoft(R) Disk Defragmenter
Detection Name: W32.GenericKD:TrojanRansom.20gp.1201

SHA 256: ae7327f36a659d01a85d4071a4570458ec03a05a6ce7d2f6d092fb46aff3e739
MD5: fa1f769475516b03881602d0824cae12
VirusTotal: https://www.virustotal.com/file/ae7327f36a659d01a85d4071a4570458ec03a05a6ce7d2f6d092fb46aff3e739/analysis/#additional-info
Typical Filename: printerinstallerclientupdater.exe
Claimed Product: Printer Updater Client
Detection Name: W32.AE7327F36A-95.SBX.TG

SHA 256: e95ada7eaa47b78e069cd2b78560d4e85b5ddfd27278234d9d38e6015a8734a8
MD5: 8723896b67bad4423ff1173bebd52e13
VirusTotal: https://www.virustotal.com/file/e95ada7eaa47b78e069cd2b78560d4e85b5ddfd27278234d9d38e6015a8734a8/analysis/#additional-info
Typical Filename: 20170512269031.pdf
Claimed Product: N/A
Detection Name: W32.E95ADA7EAA-100.SBX.TG

SHA 256: 6e2b4a15d133a62c95c1633d5cbf8a25fb165eb2bd38ffbcd049d0db14d0c33c
MD5: 3dad64eb956856a790d16014d5f3f4f6
VirusTotal: https://www.virustotal.com/file/6e2b4a15d133a62c95c1633d5cbf8a25fb165eb2bd38ffbcd049d0db14d0c33c/analysis/#additional-info
Typical Filename: 20170512376438.pdf
Claimed Product: N/A
Detection Name: W32.6E2B4A15D1-100.SBX.TG

SHA 256: 22d3b97d929c8639f6ea265f2c30e6db1bb5b8d3b54ff6466790f9fef35b4789
MD5: 424364553644a7d897b87632da4a130a
VirusTotal: https://www.virustotal.com/file/22d3b97d929c8639f6ea265f2c30e6db1bb5b8d3b54ff6466790f9fef35b4789/analysis/#additional-info
Typical Filename: 20170511746985.pdf
Claimed Product: N/A
Detection Name: W32.22D3B97D92-100.SBX.TG


(c) 2017. All rights reserved. The information contained in this newsletter, including any external links, is provided "AS IS," with no express or implied warranty, for informational purposes only.

Please feel free to share this with interested parties via email, but no posting is allowed on web sites. For a free subscription, (and for free posters) or to update a current subscription, visit https://www.sans.org/account

SANS Institute, 11200 Rockville Pike, Suite 200, North Bethesda, MD 20852