Flash Zero Day Being Exploited In The Wild


This is not the first Flash Zero Day and it certainly won’t be the last, thanks to the Sandbox implemented in Chrome since 2011 – users of the browser are fairly safe.

Those using IE are in danger (as usual) and certain versions of Firefox.

Flash Zero Day Being Exploited In The Wild

It has been rolled into the popular Angler Exploit Kit, which seems fairly prevalent although not as popular as Blackhole historically.

A zero day Flash vulnerability is being actively exploited by criminals using the popular Angler exploit kit. Adobe is investigating the report by respected French malware researcher Kafeine, who found the exploit kit circulating on cybercrime forums.

The vulnerabilities affected Flash Player versions up to 15.0.0.223 and the latest 16.0.0.257, he said. Punters on Windows 8.1 are safe, along with those using Google Chrome thanks to use of sandboxing.

Those operating other Windows platforms with Internet Explorer versions 10 and below, and some Mozilla Firefox versions, have been confirmed as vulnerable to the exploit. The free version of MalwareBytes’ Anti-Exploit tool prevented the attack, but it is as yet unknown if Microsoft’s Enhanced Mitigation Exploit Tool can fight the attack.


It’s not yet known if Microsoft EMET blocks this attack, but MBAE does.

It seems like the drive by malware slingers are stepping up their game and investing time into obfuscation and encrypted payloads to make detection/blocking more difficult.

The exploit kit drops the Bedep trojan which could serve as a persistent advertising slinger and malware downloader, (last version of Win7 at least) is bypassed. Angler remains one of the most proflic exploit kits.

The zero-day came as Cisco warned separately that exploit kit writers were taking more time to write obfuscated code. This would ostensibly prolong the life of investments such as the discovered Flash zero day that would decrease in effectiveness after users applied the imminent Adobe patches. Cisco bods in a new annual report (pdf) painted Angler as the most active kit last year, followed by Sweet Orange and Goon.

“Angler’s use of Flash, Java, Microsoft Internet Explorer, and even Silverlight vulnerabilities makes this exploit kit the ‘one to watch’,” Cisco bods said.

“Once the exploit is triggered, the malware payload is written directly into memory in a process such as iexplore.exe, instead of being written to a disk. “The payload delivered by Angler looks like a blob of encrypted data, which makes it harder to identify and block.” Angler was more popular having spiked in August thanks to a developer decision to nix the need to download Windows executables to foist malware.

It seems like there’s quite a few Exploit kits floating around, which basically bundle together a whole set of exploits and pop a web browser however they can to install further malware, things like Bedep just slurp down even more malware and install that covertly on a victims machine.

That’s usually why when you see an infected machine, it has a LOT of malware on it – not just one thing.

Source: The Register

Posted in: Exploits/Vulnerabilities, Malware

, , , ,


Latest Posts:


SecLists - Usernames, passwords, URLs, sensitive data patterns, fuzzing payloads, web shells SecLists – Usernames, passwords, URLs, sensitive data patterns, fuzzing payloads, web shells
SecLists is the security tester's companion. It's a collection of multiple types of lists used during security assessments, collected in one place.
DeepSound - Audio Steganography Tool DeepSound – Audio Steganography Tool
DeepSound is an audio steganography tool and audio converter that hides secret data into audio files, the application also enables you to extract from files.
2019 High Severity Vulnerabilities What are the MOST Critical Web Vulnerabilities in 2019?
So what is wild on the web this year? Need to know about the most critical web vulnerabilities in 2019 to protect your organization?
GoBuster - Directory/File & DNS Busting Tool in Go GoBuster – Directory/File & DNS Busting Tool in Go
GoBuster is a tool used to brute-force URIs (directories and files) in web sites and DNS subdomains (inc. wildcards) - a directory/file & DNS busting tool.
BDFProxy - Patch Binaries via MITM - BackdoorFactory + mitmProxy BDFProxy – Patch Binaries via MiTM – BackdoorFactory + mitmproxy
BDFProxy allows you to patch binaries via MiTM with The Backdoor Factory combined with mitmproxy enabling on the fly patching of binary downloads
Domained - Multi Tool Subdomain Enumeration Domained – Multi Tool Subdomain Enumeration
Domained is a multi tool subdomain enumeration tool that uses several subdomain enumeration tools and wordlists to create a unique list of subdomains.


Comments are closed.