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The partner, which is a financial institution, detected these requests on systems related to the processing of financial transactions.

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How did you find the software was backdoored?Дuring an investigation, suspicious DNS requests were identified on a partnerвЂ™s network. Shortly after notification by Kaspersky Lab all malicious files were removed from NetSarang website. Yes, we contacted the vendor and received a swift response. SHA1: 3d69fdd4e29ad65799be33ae812fe278b2b2dabe Is NetSarang aware of this situation? We have confirmed the presence of the malicious file (nssock2.dll) in the following packages previously available on the NetSarang site:

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The VFS and any additional files created by the code are encrypted and stored in locations unique to each victim. If the backdoor were activated, the attacker would be able to upload files, create processes, and store information in a VFS contained within the victimвЂ™s registry. With successful and open cooperation, we can help weed out the attackers in our midst and protect the internet for all users, not just our own.ДЇor more information please contact: Frequently Asked Questions What does the code do if activated? No single entity is in a position to defend all of the links in an institutionвЂ™s software and hardware supply-chain. This case is an example of the value of threat research as a means to secure the wider internet ecosystem. Luckily, NetSarang was fast to react to our notification and released a clean software update, most likely preventing hundreds of data-stealing attacks against their clients. Given the opportunities for covert data collection, attackers are likely to pursue this type of attack again and again with other widely used software components. ShadowPad is an example of the dangers posed by a successful supply-chain attack. The company has also published a message () acknowledging our findings and warning their customers. We informed NetSarang of the compromise and they immediately responded by pulling down the compromised software suite and replacing it with a previous clean version.

Kaspersky Lab products detect and protect against the backdoored files as вЂњвЂќ. Given that the NetSarang programs are used in hundreds of critical networks around the world, on servers and workstations belonging to system administrators, it is strongly recommended that companies take immediate action to identify and contain the compromised software.

The attackers behind this malware have already registered the domains covering July to December 2017, which indirectly confirms alleged start date of the attack as around mid July 2017.Д¬urrently, we can confirm activated payload in a company in Hong Kong. The remote access capability includes a domain generation algorithm (DGA) for C&C servers which changes every month. The VFS, and any additional files created by the code, are encrypted and stored in a location unique to each victim.

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It can download and execute arbitrary code provided from the C&C server, as well as maintain a virtual file system (VFS) inside the registry. Our analysis indicates the embedded code acts as a modular backdoor platform. Each packet also contains an encrypted вЂњmagicвЂќ DWORD value вЂњ52 4F 4F 44вЂќ (вЂDOORвЂ™ if read as a little-endian value). The data exchanged between the module and the C&C is encrypted with a proprietary algorithm and then encoded as readable latin characters.

The C&C DNS server in return sends back the decryption key for the next stage of the code, effectively activating the backdoor. The module performs a quick exchange with the controlling DNS server and provides basic target information (domain and user name, system date, network configuration) to the server.

Only when triggered by the first layer of C&C servers does the backdoor activate its second stage

Kaspersky Advanced Cyber Incident Communications.

KasperskyEndpoint Detection and Response.

KasperskyPhysical, Virtual & Cloud Workloads Security.

KasperskyEndpoint Security for Business Advanced.

KasperskyEndpoint Security for Business Select.

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Kaspersky Internet Security for Android.

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