Chercher :
Newsletter :  


Revues :
- Presse
- Presse FR
- Vidéos
- Twitter
- Secuobs





Sommaires :
- Tendances
- Failles
- Virus
- Concours
- Reportages
- Acteurs
- Outils
- Breves
- Infrastructures
- Livres
- Tutoriels
- Interviews
- Podcasts
- Communiques
- USBsploit
- Commentaires


Revue Presse:
- Tous
- Francophone
- Par mot clé
- Par site
- Le tagwall


Top bi-hebdo:
- Ensemble
- Articles
- Revue
- Videos
- Twitter
- Auteurs


Articles :
- Par mot clé
- Par auteur
- Par organisme
- Le tagwall


Videos :
- Toutes
- Par mot clé
- Par site
- Le tagwall


Twitter :
- Tous
- Par mot clé
- Par compte
- Le tagwall


Commentaires :
- Breves
- Virus
- Failles
- Outils
- Tutoriels
- Tendances
- Acteurs
- Reportages
- Infrastructures
- Interviews
- Concours
- Livres
- Communiques


RSS/XML :
- Articles
- Commentaires
- Revue
- Revue FR
- Videos
- Twitter


RSS SecuObs :
- sécurité
- exploit
- windows
- attaque
- outil
- réseau


RSS Revue :
- security
- microsoft
- windows
- hacker
- attack
- network


RSS Videos :
- curit
- security
- biomet
- metasploit
- biometric
- cking


RSS Twitter :
- security
- linux
- botnet
- attack
- metasploit
- cisco


RSS Comments :
- Breves
- Virus
- Failles
- Outils
- Tutoriels
- Tendances
- Acteurs
- Reportages
- Infrastructures
- Interviews
- Concours
- Livres
- Communiques


RSS OPML :
- Français
- International











Revue de presse francophone :
- Eric Antibi, NetApp Le Flash, valeur ajoutée de l'entreprise encore méconnue
- ITRUST IP Spoofing
- Un 3ème ProxiCenter à Rennes-Cesson pour TDF
- Vigilance - Noyau Linux buffer overflow de vhost-net handle_rx, analysé le 09 04 2014
- 8 millions de cyber-attaques contre le Bitcoin en 2013
- Guide de vie privée à l intention des entreprises et des organisations au Canada
- RAPPORT relatif à l activité de la délégation parlementaire au renseignement pour l année 2013
- Observez les méfaits de la cybercriminalité en temps réel
- Vigilance - FreeBSD déni de service via NFS Server, analysé le 09 04 2014
- 25 novembre 2014 Quel avenir pour le Data Center
- 24 mars 2015 8h30 - 18h30 7ème édition des GS Days, Journées Francophones de la Sécurité
- Ping Identity rachète Accells pour renforcer le niveau de sécurité de l'authentification sur les mobiles
- Qnap met à jour ses systèmes pour fixer la faille de sécurité OpenSSL Heartbleed
- Pure Storage lève 225 millions de dollars, portant sa valorisation à plus de 3 milliards de dollars avec le concours de grands investisseurs
- Vigilance - Windows exécution de code via BAT CMD, analysé le 08 04 2014

Dernier articles de SecuObs :
- Le ministère de l'intérieur censure une conférence au Canada
- Saut d'air gap, audit de firmware et (in)sécurité mobile au programme de Cansecwest 2014
- GCHQ: Le JTRIG torpille Anonymous qui torpille le JTRIG (ou pas)
- #FIC2014: Entrée en territoire inconnu
- Le Sénat investit dans les monnaies virtuelles
- #LPM2013: Un nouvel espoir ?
- L'ANSSI durcit le ton
- Assises 2013: Nouvel élan de jeunesse
- OWASP Framework Security Project, répertorier et fixer les contrôles de sécurité manquants
- Le bracelet Nimy, une solution d'authentification à 3 facteurs utilisant un capteur d'ECG

Revue de presse internationale :
- Australian Law Enforcement Pushes Against Encryption, Advocates Data Retention
- Europes most significant information security event
- Hands on fun at HacKid 2014
- Europes most significant information security event
- Hands on fun at HacKid 2014
- 106,000 Signatures in Support of Pirate Bay Founder Delivered to Danish Govt.
- Karma Kleanse Review - Reduce the risk inside of body
- 123D Design Tutorial Construct Features 3DThursday 3DPrinting
- CVE-2014-2983
- CVE-2014-2976
- CVE-2014-2894
- CVE-2014-2893
- CVE-2014-2888
- CVE-2014-2855
- CVE-2014-2709

Annuaire des videos
- FUZZING ON LINE PART THREE
- Official Maltego tutorial 5 Writing your own transforms
- Official Maltego tutorial 6 Integrating with SQL DBs
- Official Maltego tutorial 3 Importing CSVs spreadsheets
- install zeus botnet
- Eloy Magalhaes
- Official Maltego tutorial 1 Google s websites
- Official Maltego tutorial 4 Social Networks
- Blind String SQL Injection
- backdoor linux root from r57 php shell VPS khg crew redc00de
- How To Attaque Pc With Back Track 5 In Arabique
- RSA Todd Schomburg talks about Roundup Ready lines available in 2013
- Nessus Diagnostics Troubleshooting
- Panda Security Vidcast Panda GateDefender Performa Parte 2 de 2
- MultiPyInjector Shellcode Injection

Revue Twitter
- RT @fpalumbo: Cisco consistently leading the way ? buys vCider to boost its distributed cloud vision #CiscoONE
- @mckeay Looks odd... not much to go on (prob some slideshow/vid app under Linux)
- [SuggestedReading] Using the HTML5 Fullscreen API for Phishing Attacks
- RT @BrianHonan: Our problems are not technical but cultural. OWASP top 10 has not changed over the years @joshcorman #RSAC
- RT @mikko: Wow. Apple kernels actually have a function called PE_i_can_has_debugger:
- [Blog Spam] Metasploit and PowerShell payloads
- PinkiePie Strikes Again, Compromises Google Chrome in Pwnium Contest at Hack in the Box: For the second time thi...
- @mikko @fslabs y'all wldn't happen to have lat/long data sets for other botnets, wld you? Doing some research (free/open info rls when done)
- RT @nickhacks: Want to crash a remote host running Snow Leopard? Just use: nmap -P0 -6 --script=targets-ipv6-multicast-mld #wishiwaskidding
- An inexpensive proxy service called is actually a front for #malware distribution -

Mini-Tagwall
Revue de presse : security, microsoft, windows, hacker, attack, network, vulnerability, google, exploit, malware, internet, remote, iphone

+ de mots clés pour la revue de presse

Annuaires des videos : curit, security, biomet, metasploit, biometric, cking, password, windows, botnet, defcon, tutorial, crypt, xploit

+ de mots clés pour les videos

Revue Twitter : security, linux, botnet, attack, metasploit, cisco, defcon, phish, exploit, google, inject, server, firewall

+ de mots clés pour la revue Twitter

Top bi-hebdo des articles de SecuObs
- [IDS Snort Windows – Partie 2] Installation et configuration
- #FIC2014: Entrée en territoire inconnu
- [Ettercap – Partie 2] Ettercap par l'exemple - Man In the Middle et SSL sniffing
- [IDS Snort Windows – Partie 4] Conclusion et webographie
- [IDS Snort Windows – Partie 3] Exemple de fichier de configuration
- Powerpreter, un nouveau module Powershell de post-exploitation pour Nishang 0.3
- [Trames et paquets de données avec Scapy – Partie 5] Traceroute et visualisation 2D/3D
- Le ministère de l'intérieur censure une conférence au Canada
- OSSTMM une méthodologie Open Source pour les audits de sécurité
- USBDumper 2 nouvelle version nouvelles fonctions !

Top bi-hebdo de la revue de presse
- Using masscan to scan for heartbleed vulnerability
- INSIDE Secure acquiert Metaforic
- Introducing the rsyslog config builder tool
- 1,103 Megaupload Servers Gather Dust at Virginia Warehouse
- RS485 Arduino Network showandtell adafruit6secs
- Move Active Directory users to a group with PowerShell
- Implementing SCADA Protocols Simulating IEC104
- Windows Zero-Day Vulnerability Researched by Microsoft
- toolsmith EMET 4.0 These Aren t the Exploits You re Looking For
- L ANSSI s attèle aux décrets d application de la LPM portant sur la protection des opérateurs d importance vitale

Top bi-hebdo de l'annuaire des videos
- Tutorial 14 Pfsense OpenVpn RoadWarrior VPN
- Backtrack 5r3 Armitage Metasploit
- Tutorial 15 pfSense Squid Squidguard Content filtering
- Comment Pirater Un Ordinateur Avec Ubuntu Metasploit
- Hak5 1408 1 Reviewing Kali Linux and USB Rubber Ducky Payload Generator
- Comment creer un server botnet!!!!(Réseau de pc zombies)
- Tutoriel Supprimer Cacaoweb Botnet
- Bbkeyswin WPA d une Bbox en 2 min sous Windows
- Avoir des donuts illimit s sur le jeu Simpsons Springfield
- crypt server njrat darkcomet bifrost xtremrat spynet zeus botnet

Top bi-hebdo de la revue Twitter
- Zombies are attacking America – researchers: Banking sector DDoSers 'used botnets', say security boffins. Hackers re…
- PinkiePie Strikes Again, Compromises Google Chrome in Pwnium Contest at Hack in the Box: For the second time thi...
- [SuggestedReading] Using the HTML5 Fullscreen API for Phishing Attacks
- @mikko @fslabs y'all wldn't happen to have lat/long data sets for other botnets, wld you? Doing some research (free/open info rls when done)
- #networksecurity #cloud Expert QA: Cloud computing, HIE will be the 'new normal' - Ken Ong: The National Institute ...
- [Blog Spam] Metasploit and PowerShell payloads
- Zombies are attacking America – researchers - Banking sector DDoSers 'used botnets', say security boffins Hackers re...
- RT @mikko: Wow. Apple kernels actually have a function called PE_i_can_has_debugger:
- An inexpensive proxy service called is actually a front for #malware distribution -
- RT @helpnetsecurity: Proxy service users download malware, unknowingly join botnet //How ironic.

Top des articles les plus commentés
- [Metasploit 2.x – Partie 1] Introduction et présentation
- Microsoft !Exploitable un nouvel outil gratuit pour aider les développeurs à évaluer automatiquement les risques
- Webshag, un outil d'audit de serveur web
- Les navigateurs internet, des mini-systèmes d’exploitation hors de contrôle ?
- Yellowsn0w un utilitaire de déblocage SIM pour le firmware 2.2 des Iphone 3G
- CAINE un Live[CD|USB] pour faciliter la recherche légale de preuves numériques de compromission
- Nessus 4.0 placé sous le signe de la performance, de l'unification et de la personnalisation
- [Renforcement des fonctions de sécurité du noyau Linux – Partie 1] Présentation
- [IDS Snort Windows – Partie 1] Introduction aux IDS et à SNORT
- Origami pour forger, analyser et manipuler des fichiers PDF malicieux

Network Antivirus Evasion with XOR

Si vous voulez bloquer ce service sur vos fils RSS
Si vous voulez nous contacter ou nous proposer un fil RSS

Menu > Articles de la revue de presse : - l'ensemble [tous | francophone] - par mots clé [tous] - par site [tous] - le tagwall [voir] - Top bi-hebdo de la revue de presse [Voir]

S'abonner au fil RSS global de la revue de presse



Network Antivirus Evasion with XOR

Par Technicalinfo.net Blog
Le [2012-03-22] à 16:17:32



Présentation : Many organizations I speak with have instigated network filtering and security monitoring solutions targeted at identifying malicious binaries traversing their egress points. Something that they ve been observing in recent months is the increase of suspicious binaries that are unsupported and non-executable. Ordinarily any intercepted binaries would be farmed off to static anti-virus scanners or tin-wrapped behavioral analysis engines for classification however a growing volume of these binaries cannot be scanned or executed within virtual environments. What s going on More often than not, these perimeter network defenses are encountering encoded and obfuscated malicious binaries constructed purposefully by an attacker to bypass network threat detection products. These evasions aren t anything new, it s just that the tools and functionality to encode malicious binaries on-the-fly have become standard features in a growing number of automated attack delivery tools and DIY botnet construction kits. The non-executable binaries are typically malicious binaries that have been encoded using simple, light weight, cryptographic techniques. They need to be decoded at the receivers end and decrypted back in to their original file format for proper malicious execution. In many cases the entire original malicious binary is encrypted using a simple XOR cipher. While there are no shortage of techniques that can be used take a look at the default assortment of file encoders within the Metasploit MSFencode module for instance , XOR does seem popular and is more than good enough to bypass existing security technologies. Sometimes the simplest evasion techniques are the best. Just to be clear though, we re talking about malicious binaries that have been fully encrypted and require a separate application or script running on the victim s computer to decrypt them i.e. they cannot be executed by themselves not executable binaries that have been armored for local anti-virus evasion purposes and are shipped in an already executable format. There s a very nice walk through of manually armoring files for the purpose of evading local host inspection of malicious binaries in Bypassing Anti-Virus Scanners , and there s a good discussion of using Metasploit to construct evasive executable content over on offensive-security.com for comparisons sake. The non-executable encrypted binaries are typically either droppers for newly compromised victims, or malicious updates for existing victim installations. In the case of newly compromised victims, the encrypted malicious binary will be requested by the attacker s payload e.g. shell script and decrypted in memory before being installed on the victim. For existing victims, the encrypted binary will be requested by an already installed malware component, decrypted, and used to replace existing components of the malware installation. There are other permutations to the theme as well. For example, the use of malicious Adobe Flash files that serve as the transport instigator for the malicious commands such as the imm32.dll dissected by Stop Malvertising, or the use of PNG files to propagate XOR ed malware. What does this mean for automated network-based anti-virus solutions such as Norman, Trend Micro, etc. and auto-signature-creator anti-virus products such as FireEye, Palo Alto Networks Wildfire, etc. Since the intercepted binary is incapable of execution by itself and will never run under an emulated or virtualized behavioral system, it will not be automatically analyzed or classified as malicious. Only the targeted victim will uncover the unsavory payload. Because the technique works so well and is so easy to do, we can expect the trend to continue. Organizations will capture more and more suspicious non-executable binaries going forward often containing little or no hint as to what the file may potentially be . What can be done I believe a key perspective to dealing with this evasion technique is to better understand the suspicious nature of the file transfer. Consider it contextual awareness . Despite not being able to dissect and analyze the malicious binary directly, understanding the context of its transport will likely provide enough circumstantial evidence to arrive at a comfortable conclusion as to the maliciousness of the binary. For example What is the reputation of the file download source E.g. a corporate entity, file sharing site, hacker forum Is the source known to only host malware e.g. malicious files are encountered there frequently Is the file requester already known to be infected e.g. the requester is a known botnet victim Is there a cyclic pattern to the download file requests indicative of previous compromise e.g. an existing malware installation is requesting new updates What is the nature of the source e.g. the hosting server is a known C C server What are the ports and protocols involved e.g. HTTP over a low non-TCP80 port number What are the parameters of the file e.g. the file is not readable by any commonly installed applications on the destination host, and is approximately the same size are regularly encountered malware samples At the end of the day, the attackers have the upper-hand when it comes to obfuscating malicious binaries. The increased application of XOR ciphers designed to evade network-based binary inspection tools and appliances makes sense, and is more than sufficient to thwart these protection technologies. In that case, it makes increasing sense to look for other network artifacts that can hint at the suspiciousness of the binaries makeup and to use that contextual awareness to decide upon an automated defense reaction.

Les mots clés de la revue de presse pour cet article : network evasion
Les videos sur SecuObs pour les mots clés : network
Les éléments de la revue Twitter pour les mots clé : network



AddThis Social Bookmark Widget



Les derniers articles du site "Technicalinfo.net Blog" :

- Consumer Antivirus Blogs
- Divvy Up the Data Breach Fines
- The CISSP Badge of Security Competency
- Tales of SQLi
- How much is a zero-day exploit worth
- Now at IOActive
- Point of Sale POS and Card Reader Tampering
- Persistent Threat Detection on a Budget
- Exploit Development for Fun Profit
- NItol and 3322.org Action by Microsoft




S'abonner au fil RSS global de la revue de presse

Menu > Articles de la revue de presse : - l'ensemble [tous | francophone] - par mots clé [tous] - par site [tous] - le tagwall [voir] - Top bi-hebdo de la revue de presse [Voir]



Si vous voulez bloquer ce service sur vos fils RSS :
- avec iptables "iptables -A INPUT -s 88.190.17.190 --dport 80 -j DROP"
- avec ipfw et wipfw "ipfw add deny from 88.190.17.190 to any 80"
- Nous contacter par mail




SecuToolBox :

Mini-Tagwall des articles publiés sur SecuObs :

Mini-Tagwall de l'annuaire video :

Mini-Tagwall des articles de la revue de presse :

Mini-Tagwall des Tweets de la revue Twitter :