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quarta-feira, 31 de maio de 2023

Masad Clipper And Stealer - Windows Spyware Exfiltrating Data Via Telegram (Samples)



2019-09-25 Juniper. Masad Stealer: Exfiltrating using Telegram 

"Masad Clipper and Stealer" steals browser information, computer files,  and automatically replaces cryptocurrency wallets from the clipboard with its own.
It is written using Autoit scripts and then compiled into a Windows executable.
It uses Telegram to exfiltrate stolen information.

                             Malware Inventory (work in progress)

Links updated: Feb 12, 2023

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Related news


Video Archives Of Security Conferences And Workshops


Just some links for your enjoyment

 List of security conferences in 2014

 Video archives:

AIDE (Appalachian Institute of Digital Evidence)
Blackhat
Botconf
Bsides
Chaos Communication Congress
Defcon
Derbycon
Digital Bond's S4x14
Circle City Con
GrrCON Information Security Summit & Hacker Conference
Hack in the box HITB
InfowarCon
Ruxcon
Shmoocon
ShowMeCon
SkyDogCon
TakeDownCon
Troopers
Heidelberg Germany
Workshops, How-tos, and Demos
Special thanks to  Adrian Crenshaw for his collection of videos

Continue reading


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ALPACA: Application Layer Protocol Confusion-Analyzing And Mitigating Cracks In TLS Authentication

In cooperation with the university Paderborn and Münster University of Applied Sciences, we discovered a new flaw in the specification of TLS. The vulnerability is called ALPACA and exploits a weakness in the authentication of TLS for cross-protocol attacks. The attack allows an attacker to steal cookies or perform cross-site-scripting (XSS) if the specific conditions for the attack are met.

TLS is an internet standard to secure the communication between servers and clients on the internet, for example that of web servers, FTP servers, and Email servers. This is possible because TLS was designed to be application layer independent, which allows its use in many diverse communication protocols.

ALPACA is an application layer protocol content confusion attack, exploiting TLS servers implementing different protocols but using compatible certificates, such as multi-domain or wildcard certificates. Attackers can redirect traffic from one subdomain to another, resulting in a valid TLS session. This breaks the authentication of TLS and cross-protocol attacks may be possible where the behavior of one protocol service may compromise the other at the application layer.

We investigate cross-protocol attacks on TLS in general and conducted a systematic case study on web servers, redirecting HTTPS requests from a victim's web browser to SMTP, IMAP, POP3, and FTP servers. We show that in realistic scenarios, the attacker can extract session cookies and other private user data or execute arbitrary JavaScript in the context of the vulnerable web server, therefore bypassing TLS and web application security.

We evaluated the real-world attack surface of web browsers and widely-deployed Email and FTP servers in lab experiments and with internet-wide scans. We find that 1.​4M web servers are generally vulnerable to cross-protocol attacks, i.e., TLS application data confusion is possible. Of these, 114k web servers can be attacked using an exploitable application server. As a countermeasure, we propose the use of the Application Layer Protocol Negotiation (ALPN) and Server Name Indication (SNI) extensions in TLS to prevent these and other cross-protocol attacks.

Although this vulnerability is very situational and can be challenging to exploit, there are some configurations that are exploitable even by a pure web attacker. Furthermore, we could only analyze a limited number of protocols, and other attack scenarios may exist. Thus, we advise that administrators review their deployments and that application developers (client and server) implement countermeasures proactively for all protocols.

More information on ALPACA can be found on the website https://alpaca-attack.com/.

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