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
- microsoft


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 :
- Vigilance - WordPress Aspose DOC Exporter traversée de répertoire, analysé le 30 03 2015
- Vigilance - Joomla Gallery WD injection SQL, analysé le 30 03 2015
- Vigilance - Cisco Unified CM traversée de répertoire, analysé le 30 03 2015
- Vigilance - Python requests manipulation de Cookie, analysé le 30 03 2015
- Vigilance - TYPO3 Neos accès en lecture et écriture, analysé le 30 03 2015
- Japanese one-click fraudsters give old trick a second chance
- Tech Data lance sa première édition du Sympo Tech Tour
- Sophos intégre le Wi-Fi 802.11ac dans son Firewall UTM
- Dell annonce le PowerEdge R930
- F-Secure Les vulnérabilités logicielles continuent de fournir des exploits pour les criminels
- Fortinet annonce un accord de rachat de Meru Networks
- Tour d'horizon des solutions ESET
- Voyage au c?ur du centre nerveux d'ESET
- 15 juin de 18h00 à 20h00 - Lundi de l'IE Comprendre la cryptologie et ses applications
- HP apporte de nouvelles fonctionnalités de stockage pour le cloud computing à la distribution OpenStack Kilo

Dernier articles de SecuObs :
- Renaud Bidou (Deny All): "L'innovation dans le domaine des WAFs s'oriente vers plus de bon sens et d'intelligence, plus de flexibilité et plus d'ergonomie"
- Mises à jour en perspective pour le système Vigik
- Les russes ont-ils pwn le système AEGIS ?
- 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

Revue de presse internationale :
- Critical Vulnerability in Firefox Browser CVE-2010-3765
- Veteran's Day spurs Poisoned Search
- Myvue.com, Autotrader.co.uk and other high profile Websites infected with Malvertising
- LizaMoon mass injection hits over 226,000 URLs was 28,000
- What Happens if a PPC Company Website is Compromised to Serve jRat
- Websense 2013 Security Predictions
- Black Friday Cyber Monday Survival Guide
- Forex Website Targeted Did Cybercrooks Find the Weakest Link in Online Money Management Services
- Christmas-Themed Facebook Scams How Cybercrooks Kick it up a Notch and Piggyback on Big Brands
- Fraudulent e-Commerce Websites Exploit the Post-New Year s Day Sales Drive
- The CVE-2012-4792 and the Spear-Phishing Rotary Domains Part 1
- Super Bowl Sunday for iOS 6.1 Jailbreak Updated
- The CVE-2012-4792 and the Spear-Phishing Rotary Domains Part 2
- Battered Twitter, Phish but no Chips Updated
- Honeyclient Evasion Techniques, Bible.org Case

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
- [Ettercap – Partie 2] Ettercap par l'exemple - Man In the Middle et SSL sniffing
- Hyperion, chiffrement AES-128 et mises en conteneurs de fichiers Portable Executable 32-bit
- [Sécurité et PHP - Partie 4] Remote PHP Vulnerabilty Scanner
- [Infratech - release] version 0.6 de Bluetooth Stack Smasher
- Mises à jour en perspective pour le système Vigik
- Les russes ont-ils pwn le système AEGIS ?
- [IDS Snort Windows – Partie 2] Installation et configuration
- [Ettercap – Partie 1] Introduction et rappels
- [Ettercap – Partie 4] Contre-mesures, conclusion et webographie
- Sipvicious, un outil d’audit pour SIP

Top bi-hebdo de la revue de presse
- Tanguy de Coatpont, Kaspersky Lab Sécurité informatique, l'approche proactive reste la meilleure défense
- Log Results of Successful IIS6 WebDAV Zero Day Attacks
- Analyzing E-mail .Msg files and Attachments without Outlook
- 5 Reasons HTTPOnly won't save you
- Vigilance - EMC NetWorker obtention d'information via nsradmin, analysé le 30 07 2013
- Netsparker Web Application Security Scanner 3.5 Features Highlight
- Sécurité informatique les Métiers en Or et les métiers en danger selon l'ILV
- 20 Mai Paris conférence GCIC L'Intelligence Economique d'Entreprise au défi du numérique
- 18 juin 2015 Cnam à  Paris - Colloque ENSAE Alumni Le Individu, données et société connectée Opportunités, risques et confiance
- CLUSIF - Enquête sur l'utilisation des référentiels GT Sécurité SCADA

Top bi-hebdo de l'annuaire des videos
- Cybercrime series Part 2 of 4 Wireless ID Theft
- YouTube wireshark wireless password sniffing
- Black Hat USA 2010 TitanMist Your First Step to Reversing Nirvana 1
- Reverse SSH Tunnel Metasploit Pivoting Tut
- Backtrack 5r3 Armitage Metasploit
- TUTO Andromeda Botnet Configuration
- Tutoriel Supprimer Cacaoweb Botnet
- Comment creer un server botnet!!!!(Réseau de pc zombies)
- install zeus botnet
- Avoir des donuts illimit s sur le jeu Simpsons Springfield

Top bi-hebdo de la revue Twitter
- Cisco's 2009 Annual Security Report - - (NB: I am emp by Cisco)
- RT @id084895: PBX #hacking moves into the professional domain as arrests stack up (a golden oldie #security)
- RT @ Sniffing Browser History with NO Javascript! (via @msuiche)
- PinkiePie Strikes Again, Compromises Google Chrome in Pwnium Contest at Hack in the Box: For the second time thi...
- Released pvefindaddr v2.0.13 - - minor updates
- Newly discovered zero-day exploit bypasses UAC in Windows (bug in win32k.sys)
- crack.pl: md5/sha1 cracker/ rainbowtable generator
- RT @hdmoore: Happy 6th Birthday Metasploit.com! -
- RT @WTFuzz: I just wrote a (rather lengthy) blog post on a few java vulnerabilities, patched in java 1.6.19. Feel f ...
- Sexy piece of work at milw0rm - YourTube = 2.0 Remote SQL Database Disclosure -

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" :

- Is Upping the Minimum Wage Good for the Information Security Industry
- A cynic s view of 2015 security predictions first part
- A Cancerous Computer Fraud and Misuse Act
- The Pillars of Trust on the Internet
- If Compliance were an Olympic Sport
- Smart homes still not smarter than a fifth-grader
- Consumer Antivirus Blogs
- Divvy Up the Data Breach Fines
- The CISSP Badge of Security Competency
- Tales of SQLi




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 :