... yet. There are two kinds of jump36 TheLittleBlackBookof Computer Viruses The Basics ofthe Computer VirusA plethora of negative magazine articles and books havecatalyzed a new kind of hypochondria ... to their ever inscrutable wisdom.In any event, theLittleBlackBook has had five good yearsas a print publication. With the release ofThe Giant BlackBook of Computer Viruses, though, the ... computing. Many people think of viruses as sort of a black art. The purpose of this volume is to bring them out of the closet and look at them matter -of- factly, to see them for what theyare, technically...
... the barrel of a gun or a loud mouth. Might does not make right.cx:dx is used as the offset from the end ofthe file. Since the firstthing the virus must do is place its code at the end ofthe ... is a label identifying the start ofthe viral code andFINAL is a label identifying the end ofthe code. OFFSET FINAL- OFFSET VIRUS is independent ofthe location ofthe virus inmemory.Case ... alongside of this book. (A few are mentioned in the Suggested Readingat the end ofthe book. ) In the following chapters, I will assume thatyour knowledge ofthe technical details of PC’s—like...
... yet. There are two kinds of jump36 TheLittleBlackBookof Computer Virusesday to day computing. Many people think of viruses as sort of a black art. The purpose of this volume is to bring them ... you withmy personal battles. In the first printing ofTheLittleBlack Book, the Stealth was designed to format an extra track on the disk andhide itself there. Of course, this only worked on ... tutorial on the subject to use alongside of this book. (A few are mentioned in the Suggested Readingat the end ofthe book. ) In the following chapters, I will assume thatyour knowledge ofthe technical...
... depend on the redstiletto the way you can depend on, say, a classic black high-heel pump. The red stiletto will get alot more attention, but theblack pump will let the other pieces of your outfit ... IN THE BONES” (the classic trench, the littleblack dress…) and builds fromthere. Inspiration gives no warnings.GABRIEL GARCÍA MÁRQUEZhad invented blue jeans: the most spectacular, the ... on the man’s shirtwas, but she is the kind of woman I’d like to meet.You know she understood the appeal of effortlessness and a complete lack of pretension.As early as the 1920s, during the...
... others—but subject to approval both from the topand from the managers ofthe other departments.Previous Table of Contents Next Search Tips Advanced Search Little BlackBookof ... selecting the right team members and then giving them areas of responsibility—and the freedom to perform their tasks. The project manager was very involved, but only to the extent needed by the team ... of departments to work with you, there is no guarantee that the team will be the right one for the job or that the team members’ managers will be pleased with the decision.In some cases, a team...
... of memory,and the offset register tells how many bytes to add to the start of the 16 byte block to locate the desired byte in memory. Forexample, if the ds register is set to 1275 Hex and the ... 00 At 80H we find the value 0EH, which is the length of “Hello there!”,followed by the string itself, terminated by <CR>=0DH. Likewise, the PSP contains the address ofthe system environment, ... lead. Couldthere be a whole new world of electronic artificial life formspossible, of which computer viruses are only the most rudimentarysort? Perhaps they are the electronic analog ofthe simplest...
... the disk,reads the file descriptor records to find the right one, figure outwhere the file is and read it. Instead of doing all of this work, hesimply gives DOS the directory and name ofthe ... and the anti-viral community at the time,3 and despite the fact that the person incharge of those reviews was specifically notified ofthe problem.With a bit of technical knowledge and the ... willalready understand the majority of viruses being written today.Most of them are one of these three types and nothing more.Before we dig into how the simplest of these viruses, the overwriting...
... relative to the start of the code in the EXE file. This is relocated by DOS at load time. 18H 2 Reloc Tbl Offset Offset ofthe start of the relocation table from the start ofthe file, in ... be the first byte ofthe virus.3. Write the virus code currently executing to the end ofthe EXE filebeing attacked.4. Write the initial value of ss:sp, as stored in the EXE Header, to the location ... [FFF8H] The first is the address 100H, used to return from the subroutinejust placed on the stack to offset 100H, where the host will be. The next is the address ofthe routine hiding just under the...
... free at the time of the ;execution ofthe boot sector. ORG 0500HDISK_BUF: DB ? ;Start ofthe buffer;Here is the start ofthe boot sector code. This is the chunk we will take out ;of the compiled ... when loading, the virus would have crashed the system. (And that, incidently, is why the virus we’re discussing is the Kilroy-B. The Kilroy virus dis-cussed in TheLittleBlackBookof Computer ... SEC_SIZE - 1]/SEC_SIZEand the size ofthe file in sectors. The file size in bytes is stored atoffset 1CH from the start ofthe directory entry at 0000:0500H. The number of sectors to load isSIZE...