

- Reason core security fake update#
- Reason core security fake software#
- Reason core security fake code#
- Reason core security fake free#
More recently, IBM X-Force discovered a small-scale malware campaign involving a Neutrino bot dropping a payload that contained two Zeus malware breeds: Atmos and Zberp. The Stegano campaign, launched in late December 2016, used steganography to hide malvertising, or malware in banner ads.
Reason core security fake update#
In early 2015, the Vawtrak malware used steganography to hide update files in favicons, which are small icon files associated with a particular website or webpage. The Stegoloader backdoor Trojan, for one, has been plaguing victims for more than five years. There are many older examples of cybercriminals using steganography to carry out their malicious deeds. Not Steganography’s First Time at the Rodeo After the malware is installed, the victim’s endpoint becomes a slave in a botnet that mines cryptocurrency for a cybercriminal.
Reason core security fake code#
The function DoMiner() represents the start of the code that executes a coin miner malware. This is the image displayed to the victim:īelow is a partial capture of the code behind the image:īelow is the beginning of the script and where the skip points to begin execution. |sh executes the code that is piped to the system shell according to the schedule set in the crontab.The image file is transferred to the victim using command line URL (cURL) with instructions to skip to a position in the file where the shell code begins. The image code has a valid image header and the code below it actually displays an image.The malware author uses skip to force the server to ignore data at the beginning of the input stream and move directly to the embedded malicious code. skip moves the current pointer of the input stream.dd is a Linux tool used for copying and converting files into other formats.Now, let’s break down the components of the string dd+skip=2931+bs=1|sh: In this case, the attacker mostly likely scanned for JBoss application servers that had already been compromised and then conducted a CMDi attack.

If JexBoss is resident on the target machine, it would indicate that the server is compromised and will allow shell commands to be executed. JexBoss is a tool for testing and exploiting Java deserialization vulnerabilities in JBoss application servers.
Reason core security fake software#
The JavaScript file jexws4.jsp is not native to JBoss software - it’s actually a component of the JexBoss exploit tool. The targeted system in this case is the JBoss application server as identified by the URL path /jexws4/jexws4.jsp. The file fantasy-938617.jpg in the URL above is the fake image and the string dd+skip=2931+bs=1|sh that follows it is an instruction for the targeted endpoint/server to convert and execute the malicious code as shell code. This can allow the attacker to spread malware from a variety of legitimate sources to multiple users.
Reason core security fake free#
The following URL path is the value detected by the IBM X-Force command injection rule:Īttackers often abuse legitimate services, such as free image hosting services that allow users to post images to different platforms. The most prevalent malware sample in the attack examples analyzed by X-Force uses steganography to hide a malicious image file called fantasy-938617.jpg. We have included indicators of compromise (IoCs) for all three samples nonetheless. Although only one sample is analyzed here, the others resemble it in the way they work. Cybercriminals continue to use steganography, likely because it is easy to convince users to open images without prompting suspicion.īelow is an analysis of the most prevalent of the three malware samples used in the attacks. The X-Force team identified the use of steganography to hide embedded mining tools via command injection (CMDi) attacks detected by IBM Security’s managed intrusion detection and prevention system (IDPS) service. In September 2017, IBM X-Force reported a sixfold increase in these types of attacks. In 2017, IBM X-Force has identified three different malware samples in network attacks containing cryptocurrency CPU-mining tools hidden within fake image files. Steganography, or the practice of concealing a file, message, image or video within another file, message, image or video, may be an older technique, but it continues to be an incredibly versatile and effective method for obscuring or hiding information in plain sight.
