Ryzerlo ransomware poses as Pokemon game

The Dell SonicWall Threats Research team has received reports of a new Ransomware Trojan, Ryzerlo which encrypts the victim's files and leaves an email address to be contacted to unlock victim's files.
Infection cycle:
The Trojan comes across as Pokemon Go game with the icon
Once the victim installs the executable, the trojan adds the some changes to the registry.
The Trojan adds two autostart objects to enable startup after reboot:
  • %APPDATA%\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\[numbers].exe (copy of original)
It tries to connect to the C&C server and then the trojan encrypts all the victims documents with extensions * .txt, * .rtf, * .doc, * .pdf, * .mht, * .docx, * .xls, * .xlsx, * .ppt, * .pptx, * .odt, * .jpg, *. png, * .csv, * .sql, * .mdb, * .sln, * .php, * .asp, * .aspx, * .html, * .xml, * .psd, * .htm, * .gif, * .png with .locked extension. 
The trojan creates the following two files on the victim's desktop. One include random text and another one include email address to contact.
We urge our users to always be vigilant and cautious with any unsolicited attachments specially if you are not certain of the source. If you are responsible for your system and network security, it's time to patch your security devices.

Source : Dell SonicWall Center

Have a nice day.
(Be knowledgeable, pass it on then)

QuadRooter - the flaw that can affect millions of Android devices

A set of 4 critical Android vulnerabilities were recently published by CheckPoint. Successful exploitation of any of these exploits can give the attacker root privileges on the affected device. It is possible for an attacker to construct a malicious app that triggers these exploits with no need for special privileges making these vulnerabilities extremely dangerous. 

The vulnerabilities were found in the software drivers that accompany Qualcomm chipsets. Thereby any Android device using Qualcomm chipset is vulnerable, this counts to nearly 900 million smartphones and tablets.

The report by CheckPoint goes into the finer details about the vulnerabilities but below is a high level description of the same:

The vulnerability is present in a kernel module introduced by Qualcomm called ipc_router that provides inter-process communication where it is possible to convert a regular socket (CLIENT_PORT) into a monitoring socket (CONTROL_PORT).

Ashmem is Android's memory allocation sybsystem that enables processes to efficiently share memory buffers. Devices using Qualcomm chipsets use a modified version of ashmem, the vulnerability is in one of the functions in this version of ashmem.
Attackers can trick get_ashmem_file function to think that an arbitrary file called "ashmem" is actually an ashmem file.

CVE-2016-2503 and CVE-2106-2504 are related to Qualcomm's GPU component Kernel Graphics Support Layer:

  • CVE-2016-2503:
    One of the GPU components - Kernel graphic Support Layer - has a module kgsl_sync that is responsible for syncing between CPU and the apps. Within this module is a function that is prone to race condition flaw that can be exploited
  • CVE-2016-2504:
    A user space process can allocate and map memory to GPU, thereby it can create/destroy kgsl_mem_entry which represents an object that uses GPU memory. This object is bound to a process using GPU mapping mechanism or the "idr" mechanism. But since there is no access protection enforced, this object can be freed by another thread.

The report states that Qualcomm has released patches to OEM's (Original Equipment Manufacturers) and the open source community between April and end of July. Google has confirmed that its Verify Apps feature already blocks QuadRooter exploit.

At the moment there are no instances of malicious apps misusing these vulnerabilities in the wild. We will keep an eye on the Android landscape and provide protection against threats that exploit these vulnerabilities.

Source : Dell SonicWall Security Center

Have a good time.
(Be knowledgeable, pass it on then)

Old browsers are still running behind your firewall

On January 12th 2016, Microsoft announced it will stop supporting older versions of Internet Explorer.

It means from now on, Internet Explorer 10 and prior will not get security updates. However many people are still using older versions of Internet Explorer, and it has become a potential threat.

In July 2016, Dell SonicWALL observed that:
- 0.7% of firewalls reported use of Internet Explorer 5.x.
- 60.6% of firewalls reported use of Internet Explorer 6.x.
- 71.1% of firewalls reported use of Internet Explorer 7.x.
- 22.4% of firewalls reported use of Internet Explorer 8.x.
- 24.3% of firewalls reported use of Internet Explorer 9.x.
- 31.5% of firewalls reported use of Internet Explorer 10.x.

Unpatched Internet Explorer is insecure and can damage the system. So, we, ICT For Myanmar would like to urges all our customers to review their environment and stop using Internet Explorer 10 and prior.

Source : Dell SonicWall Security Center

Have a good time.

(Be knowledgeable, pass it on then)