Learn practical cyber security skills during SANS 2021 - Live Online. Choose from 30+ courses and three types of NetWars!

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.

April 27, 2017

@RISK: The Consensus Security Vulnerability Alert

Vol. 17, Num. 17

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 2017-04-18 - 2017-04-25


******************** Sponsored By Illusive Networks ********************

In this webcast, SANS Fellow, Dr. Eric Cole recounts his review of illusive networks' deception and protection capabilities to show cyber deception in action. Register now to learn how illusive networks' tools and services can aid early detection and response, as well as hide the deceptive actions from the enemy. http://www.sans.org/info/194400


-- SANS Automotive Cybersecurity Summit & Training | Detroit, MI | May 1-8, 2017 | Cybersecurity in the plant and on the road. Two days of in-depth Summit talks, four world-class SANS courses, and community-building opportunities.

-- SANS Security West 2017 | San Diego, CA | May 9-18 |

-- 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 |

-- 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 |

-- 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) Join us for a ground-breaking webinar, Taming the IoT Infestation in your Enterprise. Register: http://www.sans.org/info/194405

2) Wes Riley with RSA's Incident Response Practice will be discussing a simple, adaptable, and extremely effective threat hunting methodology. Register: http://www.sans.org/info/194410

3) Discover how Cloudflare can support DNSSEC at its scale with special consideration to key management, new DNSSEC algorithm types and signing on the fly. Register: http://www.sans.org/info/194415



Title: Drupal Releases Advisory for Critical Vulnerability in Drupal Core
Description: Drupal has released a security advisory to address CVE-2017-6919, a critical vulnerability in Drupal Core. CVE-2017-6919 is a critical access bypass vulnerability that manifests if the site has the RESTful web services module enabled, the site permits PATCH requests, and if an attacker has control of a user account on the targeted site. Drupal has released a software update for both the 8.2.x and 8.3.x branches of the software to address this issue.
Reference: https://www.drupal.org/SA-CORE-2017-002
Snort SID: Detection pending release of vulnerability information

Title: Adobe Releases Security Bulletin for ColdFusion
Description: Adobe has released a security bulletin to address vulnerabilities in ColdFusion 10, 11, and the 2016 release. One of the vulnerabilities is a input validation flaw that could lead to a cross-site scripting (XSS) attack. The other is an update to the Apache BlazeDS library that addresses a Java deserialization vulnerability. Software updates are available for both of these vulnerabilities.
Reference: https://helpx.adobe.com/security/products/coldfusion/apsb17-14.html
Snort SID: Detection pending release of vulnerability information

Title: SquirrelMail Found To Contain a Arbitrary Code Execution Flaw; No Official Patch Available
Description: Researchers have identified a arbitrary code execution vulnerability in SquirrelMail, a PHP-based webmail package. This flaw manifests due to "insufficient escaping of user-supplied data" if SquirrelMail has been configured to use Sendmail as the main transport. As a result, attackers could exploit this flaw to achieve arbitrary command execution on the targeted system. This issue has been identified by two separate researchers, one independent, and one from Legal Hackers. No official software update for this issue is currently available. Administrators who rely on SquirrelMail should consider switching to SMTP-based transport instead of Sendmail.
- https://legalhackers.com/advisories/SquirrelMail-Exploit-Remote-Code-Exec-CVE-2017-7692-Vuln.html
- http://seclists.org/fulldisclosure/2017/Apr/81



Hipchat resets user passwords after possible breach

Webroot Antivirus mistakenly flags Windows system files as malware, Facebook as phishing site

Combating a spate of Java malware with machine learning in real-time

Exception-oriented exploitation on iOS

Mighty Morphin Malware Purveyors: Locky Returns Via Necurs

Analysis of DOUBLEPULSAR Initial SMB Backdoor Ring 0 Shellcode

Top 10 Developer Crypto Mistakes



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-2017-3881
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-2016-7200
Title: Microsoft Edge Scripting Engine Memory Corruption Code Execution Vulnerability
Vendor: Microsoft
Description: The Chakra JavaScript scripting engine in Microsoft Edge allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site, aka "Scripting Engine Memory Corruption Vulnerability," a different vulnerability than CVE-2016-7201, CVE-2016-7202, CVE-2016-7203, CVE-2016-7208, CVE-2016-7240, CVE-2016-7242, and CVE-2016-7243.
CVSS v2 Base Score: 7.6 (AV:N/AC:H/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: 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: c19fd401e01738676c11c84c5c3d4c0d33761d2bdd5babbb499696b6a24c10e4
MD5: 42f4132977a5f70289059e4935ac3f0c
VirusTotal: https://www.virustotal.com/file/c19fd401e01738676c11c84c5c3d4c0d33761d2bdd5babbb499696b6a24c10e4/analysis/#additional-info
Typical Filename: CynetEPS.exe
Claimed Product: Cynet
Detection Name: W32.Ransom.20fx.1201

SHA 256: 061cbc0bd6409cb7e385f1a67a8b169a211fb96aff3f7ec15087ef0a2b8ccdd3
MD5: c3b143c829de9d65c0b7151cdf495209
VirusTotal: https://www.virustotal.com/file/061cbc0bd6409cb7e385f1a67a8b169a211fb96aff3f7ec15087ef0a2b8ccdd3/analysis/#additional-info
Typical Filename: helperamc.zip
Claimed Product: Advanced Mac Cleaner
Detection Name: Application:ADWARE-tpd

SHA 256: 87b3ec6edc502fa2a015a31e4c5dc7b8542a2c01c3ef68fb3f35df40117a9cf4
MD5: be056c5da13bd356e601f009a745f86a
VirusTotal: https://www.virustotal.com/file/87b3ec6edc502fa2a015a31e4c5dc7b8542a2c01c3ef68fb3f35df40117a9cf4/analysis/#additional-info
Typical Filename: 13391379.pdf
Claimed Product: N/A
Detection Name: PDF.Auto:87b3ec6edc.in05.Talos

SHA 256: d3dbe14033ad25a5e4ffe1e2b559e53ee1d1799eb54eedbd7a689d6a88fd7137
MD5: f4be84934734b03d7f11e22b4de7fd0a
VirusTotal: https://www.virustotal.com/file/d3dbe14033ad25a5e4ffe1e2b559e53ee1d1799eb54eedbd7a689d6a88fd7137/analysis/#additional-info
Typical Filename: Danielic
Claimed Product: (none)
Detection Name: OSX.MAC:Malwaregen.19hh.1201


(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