Rewterz penetration testing services help organizations determine if a cyber attacker can gain access to their critical assets while giving them detailed insights of the overall business impact of a cyber attack.
Before Rewterz got its start, the market was in dire need of a specialized and dedicated information security company. It was nearly impossible for businesses to find a trustworthy provider that could truly cover all of their bases. We wanted to meet this need, giving companies across the globe a chance to get ahead while knowing that their data is in good hands.
Rewterz penetration testing services help organizations determine if a cyber attacker can gain access to their critical assets while giving them detailed insights of the overall business impact of a cyber attack.
Before Rewterz got its start, the market was in dire need of a specialized and dedicated information security company. It was nearly impossible for businesses to find a trustworthy provider that could truly cover all of their bases. We wanted to meet this need, giving companies across the globe a chance to get ahead while knowing that their data is in good hands.
Medium
Within a span of three weeks, three notable malware variants of Neko, Mirai, and Bashlite were observed. Upon analyzing Neko botnet sample, then observed another sample with additional exploits the following week. A Mirai variant that calls itself “Asher” surfaced on July 30, then a Bashlite variant called “Ayedz” the following week. These malware variants enlist infected routers to botnets that are capable of launching distributed denial of service (DDoS) attacks.
A botnet sample, x86.neko (detected by Trend Micro as Backdoor.Linux.NEKO.AB), that brute-forces weak credentials. It then issues the following commands:
The Neko botnet is capable of executing several backdoor commands: it can execute shell commands as well as launch user datagram protocol or UDP and UPD-HEX flood attacks, inundating a router’s ability to properly process and respond to information.
It is also capable of killing processes (the “killer” function is found in its body). Neko also holds within it an extensive kill list of other malware-related processes that it will terminate.
A Mirai variant (detected by Trend Micro as Backdoor.Linux.MIRAI.VWIRC). Typical of Mirai, this variant infects devices with a BusyBox, which is a software suite for devices with limited resources. It first checks for BusyBox presence by executing the “/bin/busybox {any string}” command. If the device’s system responds with “{any string} applet not found,” the bot will proceed with its operation. The malware variant’s authors used the {any string} part to “name” the malware; in this case, they used “Asher.”
A Bashlite variant that seems to refer to itself as “Ayedz” (detected by Trend Micro as Backdoor.Linux.BASHLITE.SMJC, Backdoor.Linux.BASHLITE.SMJC8, and Backdoor.Linux.BASHLITE.SMJC4), based on this malware’s file name. Upon execution, Ayedz will send the following information about the infected device back to the host IP address 167[.]71[.]7[.]231 via port 46216:
URLs
Malware Hash (MD5/SHA1/SH256)