![]() On Android devices, in particular, we mostly rely on: In those cases, we have to rely on (and we are limited to) communication options provided by the device. In some cases, especially for recent chipsets or operating system versions, there's no public solution to obtain a physical or a full file system dump. We use various tools and techniques and sometimes also a physical approach. These extraction methods often rely on vulnerabilities and exploits (either at the hardware or the software level) developed to overcome device security. On most modern smartphone devices, where file-based encryption (FBE) is in use, a full file system is typically our "best evidence". These are found at /dev/log.Our general goal is to obtain a physical dump of the internal memory, from the very first to the very last bit. Android currently has four buffers that collect events: main, system, events, and radio. This tool dumps events generated by the system. ![]() Having said that, let’s see some useful examples. This method will be explained in more detail in an upcoming entry. The next version of the latter promises greater support for Android. Until then you can get enough information dumping the RAM with LiME and analyzing it with volatility. We must therefore assess whether it is worth dealing with the two previous risks to extract information from the device in hot that with other methods would not be possible to recover.Īs a comment, in the future probably these problems will be solved thanks to the recovery of the information through the analysis of the RAM memory dump. In addition, turning off the device can prevent subsequent access to the system if it uses encryption or locking by password. In mobile devices you have to extract the memory making use of chip-off techniques what tends to be quite complicated and expensive. You can’t easily remove the system’s internal storage memory (i.e., remove the hard drive), and make an image. Not only that, but the forensic analysis of a mobile device is more difficult than of a classical computer. The execution of a system’s own commands to extract information alters the original state of the device, so it may break the forensic chain of custody.Only when the executed commands come from a reliable source the extracted data can be trusted. Data provided by commands can not be considered 100% reliable, since the device can be deliberately compromised and generate false data.However, should take into account that the analysis of the logs generated by a machine live has two main risks: Today’s post focuses on recovering data by using the Android system’s own commands, and more specifically, the logs generated by the system. There area several methods to extract information from an android device: RAM memory dump, NAND memory image, external memory SD-card data and hot extraction data. For example, a researcher who analyzes a possible malware-infected smartphone need processes in memory, active connections, the inbound and outbound traffic, while in the analysis of a mobile phone whose owner is suspected of a crime, it will look for data that could help the investigation to provide evidence, such as calls, emails, GPS position, photos, chat history, etc. Depending on the purpose of the research, s/he will focus on extracting different types of data. Therefore, the study of the security of Android is necessary and in security, an interesting and important area is the forensic study.Ī forensic analyst must be able to extract the maximum available information from the device. If Android maintains this pace, in just 4 years there will be more Google systems in operation than Windows systems. ![]() ![]() Latest data point shows that 1.3 million Android devices are activated every day (Spanish). The introduction of the Android operating system in mobile devices is growing at a overwhelming speed. ![]()
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