Recent Security Issues


SELECTED BY THE TALOS SECURITY INTELLIGENCE AND RESEARCH GROUP


Title: Trickbot banking trojan and Ryuk ransomware targeting US hospitals and healthcare providers

Description: Cisco Talos has become aware that an adversary is leveraging Trickbot banking trojan and Ryuk ransomware to target U.S. hospitals and healthcare providers at an increasing rate. Security journalists reported on October 28, 2020 that the adversary was preparing to encrypt systems at "potentially hundreds" of medical centers and hospitals, based on a tip from a researcher who had been monitoring communications for the threat actor. On October 28 and 29, these claims were supported by the reports of six U.S. hospitals being compromised with Ryuk in the span of 24 hours.

References: https://blog.talosintelligence.com/2020/10/healthcare-advisory.html

Snort SIDs:

RYUK

50644, 50645, 53332, 53333, 53335, 53336

EMOTET

43890, 43891, 44559, 44560, 47616, 47617, 48402, 51971, 52029, 53108, 53353, 53354, 55931, 56003, 143892, 49888, 49889, 53770, 53771, 54804, 54805, 54900, 54901, 54924, 54925, 55253, 55254, 55591, 55592, 55781, 55782, 55787, 55788, 55869, 55870, 55873, 55874, 55929, 55930, 56046, 56047, 51967, 51968, 51969, 51970, 53355, 53356, 53357, 53358, 53359, 53360

TRICKBOT

40643, 40644, 44399, 44400, 44401, 44402, 44403, 44404, 44405, 44406, 44407, 44408, 44409, 44410, 44411, 44412, 44413, 44414, 44415, 47618, 50712, 50713, 50714, 50715, 54014, 54061, 54062, 54063, 54064, 54065, 54066, 54067, 54068, 54069, 54070, 54071, 54072, 54073, 54074, 54075, 54076, 54077, 54078, 54079, 54080, 54199, 54200, 54201, 54202, 54203, 54204, 54205, 54206, 54207, 54208, 54209, 54210, 54211, 54212, 54213, 55002, 55003, 55004, 55005

POWERSHELL EMPIRE

38259, 38260, 38261, 44561, 44562, 44563, 44564, 45352, 52063, 52064

COBALT STRIKE

53656, 53657, 53658, 53659, 45907, 45908, 53972, 53973, 53974, 53975, 30229, 30471, 30480, 53757, 53758, 54095, 54096, 8068, 54110, 54111, 54112, 54113, 54114, 54115, 54116, 54117, 54169, 54170, 54171, 54172, 54173, 54174, 54175, 54183, 13913, 23878, 38038, 54180, 54181, 54182


Title: Talos discovers multiple remote vulnerabilities in Synology Router Manager

Description: Cisco Talos recently discovered multiple remote vulnerabilities in software that helps power Synology routers. The bugs exist in Synology Router Manager (SRM) -- a Linux-based operating system for Synology routers -- and QuickConnect, a feature inside SRM that allows users to remotely connect to their routers. An adversary could use these vulnerabilities to carry out a range of malicious actions, including executing remote code on the device, the exposure of sensitive information regarding the victim's network and communication with other devices connected to the same network.

References: https://blog.talosintelligence.com/2020/10/vulnerability-spotlight-multiple.html#more

Snort SIDs: 53755, 53756, 53839, 53840, 53959, 54009


Security News


Windows 0-day vulnerability under active exploitation revealed by Google's Project Zero, patch not expected for 2 more weeks.

https://arstechnica.com/information-technology/2020/10/googles-project-zero-discloses-windows-0day-thats-been-under-active-exploit/


Iranian-backed hackers targeted high-profile attendees of two international security and policy conferences with phishing emails to steal passwords and other sensitive data.

https://techcrunch.com/2020/10/28/microsoft-iran-hackers/


Security issues posed by a permanent working-from-home world shows spikes in RDP servers exposed to the Internet, as keeping internal network control no longer applies.

https://arstechnica.com/features/2020/11/future-of-collaboration-03/


Bad actors are exploiting Google Drive's collaboration feature to send users to malicious sites.

https://www.wired.com/story/beware-a-new-google-drive-scam-landing-in-inboxes/


Election security dominates several news sites, as concern over attacks and disinformation campaigns take off.

https://threatpost.com/cyberattacks-disinformation-top-concerns-election-day/160814/

Vulnerabilities with Exploits


COMPILED BY THE QUALYS VULNERABILITY RESEARCH TEAM


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-2020-14882

Title: Oracle WebLogic Server Remote Code Execution Vulnerability

Vendor: Oracle

Description: Oracle Weblogic server is exposed to a critical vulnerability. The vulnerability could be exploited by an unauthenticated attacked with a single HTTP request. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle WebLogic Server. Successful attacks of this vulnerability can result in takeover of Oracle WebLogic Server.

CVSS v3 Base Score: 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)


ID: CVE-2020-14871

Title: Oracle Solaris Remote Code Execution Vulnerability

Vendor: Oracle

Description: Easily exploitable vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Solaris. While the vulnerability is in Oracle Solaris, attacks may significantly impact additional products. Successful attacks of this vulnerability can result in takeover of Oracle Solaris.

CVSS v3 Base Score: 10.0 (AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H)


ID: CVE-2020-17087

Title: Microsoft Windows Kernel Privilege Escalation Vulnerability

Vendor: Microsoft

Description: Security researchers from Google's Project Zero have disclosed a zero-day vulnerability in the Windows operating system which is currently being exploited in the wild. The Google Project Zero team notified Microsoft last week and gave the company seven days to patch the bug.

CVSS v3 Base Score: 7.1 (AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H)


ID: CVE-2020-15999

Title: Google Chrome Freetype Heap Buffer Overflow Vulnerability

Vendor: Google

Description: Google Chrome issued an update announcement for the browser across all platforms. Google confirmed that the "stable channel" desktop Chrome browser is being updated across Windows, Mac, and Linux platforms. As per Google's official sources, this urgent update will start rolling out over the coming few days or weeks.

CVSS v3 Base Score: 8.8 (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)


ID: CVE-2020-14750

Title: Oracle WebLogic Server Unauthenticated Remote Code Execution Vulnerability

Vendor: Oracle

Description: Oracle released critical October update to patch CVE-2020-14882 earlier in October. Oracle WebLogic Server has now observed that attackers can now bypass this patch exposing an unauthenticated Remote Code Execution vulnerability. Unauthorized attackers can continue to bypass the WebLogic background login restrictions and control the server even after WebLogic is patched for CVE-2020-14882.

CVSS v3 Base Score: 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)


ID: CVE-2020-13935

Title: Apache Tomcat WebSocket Denial of Service Vulnerability

Vendor: Apache

Description: The payload length in a WebSocket frame was not correctly validated in Apache Tomcat. Invalid payload lengths could trigger an infinite loop. Multiple requests with invalid payload lengths could lead to a denial of service.

CVSS v3 Base Score: 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)


ID: CVE-2020-1472

Title: Microsoft Netlogon Elevation of Privilege Vulnerability

Vendor: Microsoft

Description: An elevation of privilege vulnerability exists when an attacker establishes a vulnerable Netlogon secure channel connection to a domain controller, using the Netlogon Remote Protocol (MS-NRPC). An attacker who successfully exploited the vulnerability could run a specially crafted application on a device on the network. To exploit the vulnerability, an unauthenticated attacker would be required to use MS-NRPC to connect to a domain controller to obtain domain administrator access.

CVSS v3 Base Score: 10.0 (AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H)


ID: CVE-2019-4563

Title: IBM Security Directory Server Vulnerability

Vendor: IBM

Description: IBM Security Directory Server does not set the secure attribute on authorization tokens or session cookies. Attackers may be able to get the cookie values by sending a http:// link to a user or by planting this link in a site the user goes to. The cookie will be sent to the insecure link and the attacker can then obtain the cookie value by snooping the traffic.

CVSS v3 Base Score: 5.3 (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)

Prevalent Malware Files


COMPILED BY TALOS SECURITY INTELLIGENCE AND RESEARCH GROUP



SHA 256: F059A5358C24CC362C2F74B362C75E02035FDF82F9FFAE8D553AFEE1A271AFD0

MD5: ce4395edbbf9869a5e276781af2e0fb5

VirusTotal: https://www.virustotal.com/gui/file/f059a5358c24cc362c2f74b362c75e02035fdf82f9ffae8d553afee1a271afd0/details

Typical Filename: wupxarch635.exe

Claimed Product: N/A

Detection Name: W32.Auto:f059a5358c.in03.Talos


SHA 256: 432FC2E3580E818FD315583527AE43A729586AF5EE37F99F04B562D1EFF2A1FD

MD5: dd726d5e223ca762dc2772f40cb921d3

VirusTotal: https://www.virustotal.com/gui/file/432fc2e3580e818fd315583527ae43a729586af5ee37f99f04b562d1eff2a1fd/detection

Typical Filename: ww24.exe

Claimed Product: N/A

Detection Name: W32.TR:Attribute.23ln.1201


SHA 256: C3E530CC005583B47322B6649DDC0DAB1B64BCF22B124A492606763C52FB048F

MD5: e2ea315d9a83e7577053f52c974f6a5a

VirusTotal: https://www.virustotal.com/gui/file/c3e530cc005583b47322b6649ddc0dab1b64bcf22b124a492606763c52fb048f/detection

Typical Filename: c3e530cc005583b47322b6649ddc0dab1b64bcf22b124a492606763c52fb048f.bin

Claimed Product: N/A

Detection Name: Win.Dropper.Agentwdcr::1201


SHA 256: 15716598F456637A3BE3D6C5AC91266142266A9910F6F3F85CFD193EC1D6ED8B

MD5: 799b30f47060ca05d80ece53866e01cc

VirusTotal: https://www.virustotal.com/gui/file/15716598f456637a3be3d6c5ac91266142266a9910f6f3f85cfd193ec1d6ed8b/detection

Typical Filename: mf2016341595.exe

Claimed Product: N/A

Detection Name: Win.Downloader.Generic::1201


SHA 256: 85B936960FBE5100C170B777E1647CE9F0F01E3AB9742DFC23F37CB0825B30B5

MD5: 8c80dd97c37525927c1e549cb59bcbf3

VirusTotal: https://www.virustotal.com/gui/file/85b936960fbe5100c170b777e1647ce9f0f01e3ab9742dfc23f37cb0825b30b5/detection

Typical Filename: Eternalblue-2.2.0.exe

Claimed Product: N/A

Detection Name: Win.Exploit.Shadowbrokers::5A5226262.auto.talos