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[38+] Art Rupestre Moderne - #Lascaux -- Ancient Paleolithicpaintings..

Posted by Transparency Myanmar 2010
Sunday, January 28, 2024
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22+

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

Posted by Transparency Myanmar 2010
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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

Hashes

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SolarMarker Malware Uses Novel Techniques To Persist On Hacked Systems

Posted by Transparency Myanmar 2010
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 In a sign that threat actors continuously shift tactics and update their defensive measures, the operators of the SolarMarker information stealer and backdoor have been found leveraging stealthy Windows Registry tricks to establish long-term persistence on compromised systems.

Cybersecurity firm Sophos, which spotted the new behavior, said that the remote access implants are still being detected on targeted networks despite the campaign witnessing a decline in November 2021.

Boasting of information harvesting and backdoor capabilities, the .NET-based malware has been linked to at least three different attack waves in 2021. The first set, reported in April, took advantage of search engine poisoning techniques to trick business professionals into visiting sketchy Google sites that installed SolarMarker on the victim's machines.

Then in August, the malware was observed targeting healthcare and education sectors with the goal of gathering credentials and sensitive information. Subsequent infection chains documented by Morphisec in September 2021 highlighted the use of MSI installers to ensure the delivery of the malware.

The SolarMarker modus operandi commences with redirecting victims to decoy sites that drop the MSI installer payloads, which, while executing seemingly legitimate install programs such as Adobe Acrobat Pro DC, Wondershare PDFelement, or Nitro Pro, also launches a PowerShell script to deploy the malware.


"These SEO efforts, which leveraged a combination of Google Groups discussions and deceptive web pages and PDF documents hosted on compromised (usually WordPress) websites, were so effective that the SolarMarker lures were usually at or near the top of search results for phrases the SolarMarker actors targeted," Sophos researchers Gabor Szappanos and Sean Gallagher said in a report shared with The Hacker News.

The PowerShell installer is designed to alter the Windows Registry and drop a .LNK file into Windows' startup directory to establish persistence. This unauthorized change results in the malware getting loaded from an encrypted payload hidden amongst what the researchers called a "smokescreen" of 100 to 300 junk files created specifically for this purpose.

"Normally, one would expect this linked file to be an executable or script file," the researchers detailed. "But for these SolarMarker campaigns the linked file is one of the random junk files, and cannot be executed itself."

What's more, the unique and random file extension used for the linked junk file is utilized to create a custom file type key, which is ultimately employed to execute the malware during system startup by running a PowerShell command from the Registry.

The backdoor, for its part, is ever-evolving, featuring an array of functionalities that allow it to steal information from web browsers, facilitate cryptocurrency theft, and execute arbitrary commands and binaries, the results of which are exfiltrated back to a remote server.

"Another important takeaway […], which was also seen in the ProxyLogon vulnerabilities targeting Exchange servers, is that defenders should always check whether attackers have left something behind in the network that they can return to later," Gallagher said. "For ProxyLogon this was web shells, for SolarMarker this is a stealthy and persistent backdoor that according to Sophos telematics is still active months after the campaign ended."

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[39+] Polices Artistiques Modernes | Deux Alphabets - L'association Emily Cal..

Posted by Transparency Myanmar 2010
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jolies polices d'écritures mariage gratuites | 広告デザイン, デザイン, 広告

23+ jolies polices d'écritures mariage gratuites | 広告デザイン, デザイン, 広告

Fast Emulator For Shellcodes In Rust

Posted by Transparency Myanmar 2010
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I have developed a fast emulator for modern shellcodes, that perform huge loops of millions of instructions emulated for resolving API or for other stuff.

The emulator is in Rust and all the few dependencies as well, so the rust safety is good for emulating malware.  

There are shellcodes that can be emulated from the beginning to the end, but when this is not possible the tool has many features that can be used like a console, a memory tracing, register tracing, and so on.

https://github.com/sha0coder/scemu



In less than two seconds we have emulated 7 millions of instructions arriving to the recv. 

At this point we have some  IOC like  the ip:port where it's connecting and other details.

Lets see what happens after the recv() spawning a console at position: 7,012,204


target/release/scemu -f shellcodes/shikata.bin -vv -c 7012204



In the console, pressing "enter" several times to emulate  step into several steps and we arrive to a return instruction.


Let's see the stack in this moment:


The "ret" instruction is going to jump to the buffer read with recv() so is a kind of stager.

The option "-e" or "--endpoint" is not ready for now, but it will allow to proxy the calls to get the next  stage automatically, but for now we have the details to get the stage.


SCEMU also identify all the Linux  syscalls for 32bits shellcodes:



The encoder used in shellgen is also supported https://github.com/MarioVilas/shellgen

Let's check with cobalt-strike:


We can see where is connecting and which headers is using, so right now we can replicate the communications.



In verbose mode we could do several greps to see the calls and correlate with ghidra/ida/radare or  for example grep the branches to study the emulation flow.


target/release/scemu -f shellcodes/rshell_sgn.bin -vv | grep j


target/release/scemu -f shellcodes/rshell_sgn.bin -vv -c 44000 -l


The -l --loops options makes the emulation a bit slower but track the number of iterations.

Is possible to print all the registers in every step with  -r or --registers  but also is possible to track  specific register for example with --reg esi


target/release/scemu -f shellcodes/shikata.bin --reg esi 


In this case ESI register points to the API name, if we track EAX or ECX will see that are the counters of the loop. These shellcodes  contains a hard loop to locate the API names.

The flag -i or --inspect allow to monitor memory using expressions like "dword ptr [eax + 0xa]"

target/release/scemu -f shellcodes/shikata.bin -i 'dword ptr [esi]'

And more things to come...  find a demo below:

https://www.youtube.com/watch?v=qTYmMjW3DFs





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