Petya Variant Sample Technical Analysis

On the evening of June 27, 2017, multiple enterprises were attacked by ransomware, hence service interruption was caused. The first infections were identified in Ukraine. Since then, it has spread to many countries, including Brazil, Germany, Russia, and the US. This event had such an extensive and significant impact that technical support personnel of NSFOCUS paid close attention to it, and captured and analyzed the sample immediately. 阅读全文 “Petya Variant Sample Technical Analysis” »

Analysis on Exposed IoT Assets in China

With the maturity of sensing, computing, and communication technologies, the Internet of Things (IoT) will be more and more widely used in various industries. Gartner, a market research agency, predicts that endpoints of the IoT will grow at a 33% CAGR from 2015 through 2020, reaching an installed base of 20.4 billion units, with almost two-thirds of them consumer applications. Spending on networked consumer and business endpoints will displace non-networked, growing at a 20% CAGR to $2.9 trillion. 阅读全文 “Analysis on Exposed IoT Assets in China” »

Analysis Report on the WannaCry Sample

The sample exploits the ETERNALBLUE SMB vulnerability or DOUBLEPULSAR backdoor for propagation and infection of the ransomware. The sample first connects to the domain name http://www.iuqerfsodp9ifjaposdfjhgosurijfaewrwergwea.com, to test network connectivity. If the network is reachable, the sample exits; otherwise, the sample carries out subsequent behaviors. Therefore, a reachable domain name can be registered to stop further attacks. 阅读全文 “Analysis Report on the WannaCry Sample” »

Microsoft Windows Server 2003 R2 IIS 6.0 Remote Code Execution Technical Analysis and Solution

On March 37, Zhiniang Peng and Chen Wu disclosed the Internet Information Services (IIS) 6.0 WebDAV remote code execution vulnerability, which has been assigned CVE-2017-7269 and CNNVD-201703-1151. This vulnerability, which could cause buffer overflows, is associated with the ScStoragePathFromUrl function in the WebDAV service in IIS 6.0 in Microsoft Windows Server 2003 R2. 阅读全文 “Microsoft Windows Server 2003 R2 IIS 6.0 Remote Code Execution Technical Analysis and Solution” »

Dridex Banking Malware Sample Technical Analysis and Solution

IBM’s X-Force security team recently discovered an updated version of Dridex, called Dridex v4. Dridex is one of the most popular banking trojans. It was first spotted in 2014 when it was viewed as the successor of GameOver ZeuS (GoZ) because it uses GoZ-related techniques. An important improvement in Dridex v4 is that it evades detection antivirus software by introducing the AtomBoming technique for malicious code injection. 阅读全文 “Dridex Banking Malware Sample Technical Analysis and Solution” »