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New JobCrypter ransomware variant captures screenshots of infected devices

Security researchers have discovered a new variant of the two-year-old JobCrypter ransomware that now features an additional encryption layer and a much longer decryption key, making it more powerful and difficult to evade compared to its earlier variants.

While analysing the ransomware, researchers at Trend Micro also observed that it features the ability to send a screenshot of a targeted device to an email address via SMTP and can even change the wallpaper of infected devices to include a ransom note as well as a display box containing details of ransom demands and instructions.

“Once it finds a file, it encodes all the file’s content to Base64 and encrypts the encoded content with Triple DES algorithm, and then encodes the encrypted file again to Base64. It also prepends the ransom note with the encrypted file instead of dropping another file in the system as most ransomware routines do before it finally deletes the original file in the drive.

“The ransom note demands a payment of €1,000 within 24 hours to get the decrypter. The key is made of 67 digits of random numbers between 0 to 9 – found in the registry and body of the sent email – but is deleted by the malware itself during encryption of the files,” they noted in a blog post detailing the ransomware’s traits.

Commenting on the discovery of JobCrypter’s new and more powerful variant, Roy Rashti, cyber-security expert at BitDam, told SC Magazine UK that the earlier variant of JobCrypter wasn’t among the most potent ones of its time as it decrypted files with a relatively weak 20-character decimal key which made it conducive to brute-force attack methods.

The original ransomware also displayed several predictable behaviours which made it easy for security professionals to assess the source of the random function which, in turn, made it possible to discover the encryption key in about 10 seconds.

“In the new version, the attackers have significantly improved the encryption method using the Triple DES algorithm and longer keys,” Rashti added.

Despite such improvements, the new JobCrypter variant does have an Achilles heel after all. According to researchers at Trend Micro, the 67-digit decryption key required by victims to recover their files is initially stored in the registry and body of the sent email before it is deleted by the malware itself during encryption of the files.

“Since the key used in encrypting the files was in the system prior to deletion, decryption is possible. Experienced cybersecurity practitioners will notice and know that while the routine is unconventional, the ransom note always ends in “;” and is prepended before the encrypted file content, making it possible to recover important data files,” they added.

Rashti added that there are more tell-tale signs of the presence of the ransomware before it starts encrypting files stored in targeted devices. The ransomware is usually stored in zip files or business folders that serve as attachments to phishing or spam emails sent to targeted individuals or businesses.

By deploying advanced threat protection solutions that can detect sophisticated threats as well as a reputed endpoint solution, victims of ransomware attacks can prevent their devices from getting infected by the new variant. Considering that the ransomware initially stays dormant and only registers itself to run after a reboot, targeted businesses and individuals will need to be alert at all times to spot/preempt its arrival.   

According to Martin Jartelius, CSO at Outpost24, a simple and easy ways to decrease impact is to ensure that users have write access only where needed, that local users are not administrators on their devices and that the system does not execute software from the temporary internet files or temporary email file folders.

“The most important steps users can take is ensuring that their systems are up-to-date, and they have endpoint protection software with the latest definitions installed. AV vendors and independent researchers are constantly finding and reporting new strains of malware, and it’s critical to stay on top of updates to ensure you remain protected from emerging threats. It is also important to take regular, full backups to ensure your data is protected in case of disaster,” says Ben Schmidt, CSO at PolySwarm.

List of Firewall appliances Company in India

List of Firewall appliances Company in India

List of Firewall appliances Company in India

List of Firewall appliances Company in India

In general, a computer appliance is a computing device with a specific function and limited configuration ability, and a software appliance is a set of computer programs that might be combined with just enough operating system (JeOS) for it to run optimally on industry standard computer hardware or in a virtual machine.

A firewall appliance is a combination of a firewall software and an operating system that is purposely built to run a firewall system on a dedicated hardware or virtual machine. These include:

  • embedded firewalls: very limited-capability programs running on a low-power CPU system,
  • software-based firewall appliances: a system that can be run in independent hardware or in a virtualised environment as a virtual appliance
  • hardware-based firewall appliances: a firewall appliance that runs on a hardware specifically built to install as a network device, providing enough network interfaces and CPU to serve a wide range of purposes. From protecting a small network (a few network ports and few megabits per second throughput) to protecting an enterprise-level network (tens of network ports and gigabits per second throughput).

The following table Lists of TOP Firewall Companies in India, different Hardware / Software firewall appliances lists.

List of TOP Firewall Companies in India

Firewall License Cost OS
Check Point

Check Point

Proprietary Included on Check Point
security gateways
Proprietary operating system Check Point IPSO
and Gaia (Linux-based)
FortiGate

FortiGate

Proprietary Included on all Fortigate
devices
Proprietary, FortiOS
Palo Alto Networks

Palo Alto Networks

Proprietary Included on Palo Alto
Networks firewalls
Proprietary operating system PANOS
WatchGuard

WatchGuard

Proprietary Included on all
WatchGuard firewalls
Proprietary operating system
Sophos

Sophos

Proprietary Included on Sophos UTM Linux-based appliance
Cisco Asa Firepower

Cisco Asa Firepower

Proprietary Included on all CISCO
ASA devices
Proprietary operating system
Cisco PIX

Cisco PIX

Proprietary Included on all CISCO
PIX devices
Proprietary operating system
Forcepoint Mcafee Firewall

Forcepoint

Proprietary Included on Intel Security Appliance Linux-based appliance
Juniper SSG

Juniper SSG

Proprietary Included on Netscreen
security gateways
Proprietary operating system ScreenOS
Juniper SRX

Juniper SRX

Proprietary Included on SRX
security gateways
Proprietary operating system Junos
Sonicwall

Sonicwall

Proprietary Included on Dell appliance Proprietary operating system SonicOs
Barracuda Firewall

Barracuda Firewall

Proprietary Included Firewall Next Generation appliance Windows-based appliance
embedded firewall distribution
Cyberoam

Cyberoam

Proprietary Included Firewall Sophos appliance Windows-based appliance
embedded firewall distribution
D-Link Proprietary Included Firewall DFL Windows-based appliance
embedded firewall distribution
Endian Firewall Proprietary Free / Paid Linux-based appliance
Opendium Iceni Proprietary Free / Paid Linux-based, with optional web filtering / auditing.
IPCop GPL Free / Paid Linux-based appliance
firewall distribution
 

pfSense

ESF/BSD Free / Paid FreeBSD-based appliance
firewall distribution
IPFire GPL Free / Paid Linux/NanoBSD-based appliance
firewall distribution
Untangle GPL Free / Paid Linux/NanoBSD-based appliance
firewall distribution
Zeroshell GPL Free / Paid Linux/NanoBSD-based appliance
firewall distribution
SmoothWall GPL Free / Paid Linux-based appliance
embedded firewall distribution
WinGate GPL Free / Paid Windows-based appliance
embedded firewall distribution
Calyptix Security BSD Free OpenBSD-based appliance
firewall distribution
Halon Security BSD Free OpenBSD-based appliance
Vantronix BSD Free OpenBSD-based appliance

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