hack (1) manual page

HACK(1) User Commands HACK(1)


hack – user interface to the HACK protocol (automatically identifying and exploiting weaknesses on a remote host)


hack [-p] [-l] [-i] [-s minport maxport] [-P] [-h] [-w] [-q] [-L]


The hack command opens a TCP or LBP connection to a remote host with the intention of locating and exploiting that system’s weaknesses using the HACK protocol. hack is particularly useful for users who desire the glory of hacking but cannot or will not learn UNIX. If hack is invoked without the hostname argument, it enters command mode, indicated by its prompt hack>'' is invoked with arguments, it performs abreach” command with those arguments.



Pathetic mode. This assumes that the target host is poorly-administered and contains one or more ancient security holes (sendmail DEBUG, fingerd hole, valid /etc/passwd in ftp dir, etc.) and thus attempts a “quick-and- dirty” intrusion on the machine. No attempts at subtlety or anonymity are made when hack is in pathetic mode; it assumes that the target host’s administrators either keep no logs or check them on a bi-yearly basis.


Extended hack. This option will initiate a long- term attack on the target host, which entails not only the standard HACK protocol at the time the command is executed, but also a series of probes to be executed at carefully-spaced intervals in the future. The initial hack connection will by default record the target host’s current users and last administrator logins, and future probes as a result of the -e option will attempt to avoid these times to escape immediate detection. (The target host’s logs are, of course, tailored automatically by most versions of hack.)


Interactive mode. When hack is executed with the -i option enabled, it will perform its initial scan followed by the prompt Hack now? y/n'' If Y is not selected,Hack later” will be displayed, and upon each future login the user will be prompted again until he sees fit to complete the hack.


Scan ports. Attempts strobe – like port scanning between the selected ports on the target host. Security holes on these ports will be automatically exploited, and hack will display “Hackable port detected” for each. hack then enters interactive mode for each hackable port, prompting the user according to -i.


Hopeless mode. This assumes that the user executing the hack command simply is not destined to become knowledgable in the field, successfully penetrate remote machines, or to do anything practical with a

computer, for that matter. The -h mode aborts execution of hack, but sends a FAQ request via e-mail to alt.2600, with Reply-to: set to the USER variable of the ENVIRON option. Additionally, -h sends a membership request to America Online, Incorporated, for an AOL startup package and 15 free hours of Internet strangulation.


Planetary mode. This function hacks the planet, pure and simple. -P bombards every known host on the Internet with hack penetration attempts. All successful intrusions will be reported real-time, although this option may take weeks, months, or years on anything short of a quantum computer. Bandwidth is not a concern here; however, don’t use this mode unless you REALLY don’t know what you’re doing.


Quarantined hosts. Setting the -q option allows hack to attack non-networked hosts such as standalone workstations, fast-food-chain cash registers and graphing calculators via LBP. (For more information on Linkless Bytestream Protocol see RFC 3733 section T.)


Localhost. The -L option ignores hostname arguments and attempts to penetrate the localhost. If executed by a non-superuser, hack attempts to gain root access via the HACK protocol. If executed by root or similar superuser, hack selects an attack method (chosen randomly from /etc/hack/annoying/mediahyped/attackmthds) and executes it against the localhost. (CERT note: it is conceivable that certain aspects of the -L function might possibly make it a threat to system security; be aware of this before installing on a multiuser system.)


hack is available via anonymous ftp at the following sites:

ftp://ftp.cert.org/pub/tools/hack.c <hack.exe for DOS>


or via mail order: send mail to cert@cert.org with “GET HACKING TOOL” in the message body. Hack95, an icon-based interface for Windows 95 users, should be available by early October 1996.


Terrel Maxeme <terrel@sad.com>

Information about new releases, mailing lists, and other related issues can be found from the hackWW home page at http://www.ignorance.net/hack


hackd(8), clueless(1), breach(2)

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