![]() ![]()
The first malicious rootkit for the Windows NT operating system appeared in 1999: a trojan called NTRootkit created by Greg Hoglund. Advanced techniques included hooking low-level disk INT 13H BIOS interrupt calls to hide unauthorized modifications to files. Over time, DOS-virus cloaking methods became more sophisticated. The first documented computer virus to target the personal computer, discovered in 1986, used cloaking techniques to hide itself: the Brain virus intercepted attempts to read the boot sector, and redirected these to elsewhere on the disk, where a copy of the original boot sector was kept. This exploit was equivalent to a rootkit. Memory cleaner mac vulnerable code#A review of the source code for the login command or the updated compiler would not reveal any malicious code. Additionally, the compiler would detect attempts to compile a new version of the compiler, and would insert the same exploits into the new compiler. The modified compiler would detect attempts to compile the Unix login command and generate altered code that would accept not only the user's correct password, but an additional " backdoor" password known to the attacker. In the lecture he gave upon receiving the Turing award in 1983, Ken Thompson of Bell Labs, one of the creators of Unix, theorized about subverting the C compiler in a Unix distribution and discussed the exploit. Lane Davis and Steven Dake wrote the earliest known rootkit in 1990 for Sun Microsystems' SunOS UNIX operating system. ![]() These first-generation rootkits were trivial to detect by using tools such as Tripwire that had not been compromised to access the same information. If an intruder could replace the standard administrative tools on a system with a rootkit, the intruder could obtain root access over the system whilst simultaneously concealing these activities from the legitimate system administrator. The term rootkit or root kit originally referred to a maliciously modified set of administrative tools for a Unix-like operating system that granted " root" access.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |