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Catfish57

Corrupted RAR files?

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I keep getting downloaded RAR files that on extraction says there are no files or they are corrupted or of unknown format, the container shows file size, any help on what to do, this is happening continuously.

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first i would suggest using 7-Zip on those files and see if that helps.. :smile:

https://www.7-zip.org/download.html

secondly i think the files ur trying to unzip r from warez sites, correct.. i think that the files contain some sort of patch, crack or keygen and ur antivirus is catching it.. causing ur unzip to fail.. so disable ur antivirus just while u unzip the files.. :pirate:

let me know what happens.. :sun:

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Downloads actually came from here, I get a lot of them on occasion. I had already found 7-zip and it works great, Thanks for the reply!

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You should give some topics,so we could check.And yes,your antivirus might think that you downloaded virus or something suspicious,but give us links to these topics.

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6 hours ago, Catfish57 said:

Downloads actually came from here, I get a lot of them on occasion. I had already found 7-zip and it works great, Thanks for the reply!

u never mentioned if u disabled ur antivirus and then unzipped the files, to see if that worked.. please let me know.. also like aabee mentioned could u share here a couple of the posts here that r causing u problems??

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Or you just disabled some functions of Winrar.Like i installed to my mother 32 and 64 bit 7-Zip and whn i uninstalled wrong version of 7-Zip, it actually uninstalls also right 7-Zip

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But interesting thing is that WinRar seems to had not working with some of my customers, who are not dealing with files and tried to use .And not WinRar, but other programs, who are unpacking rar files.So there might be some kind of 0-day security flaw.One day files seems to have corrupted and then restarting next day everything works fine and nobody does not know, whats wrong.

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https://www.isunshare.com/blog/how-to-repair-archive-files-after-corrupt-or-damage/#method2

 

Edited by Rædwulf
Must Code All External Links

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On 12/22/2018 at 2:53 AM, Smooth said:

Also make sure if using WinRaR that you are using 5.0 or higher

Recently I came up to this article:

19-year-old code-execution flaw exploited within days of being disclosed.

Malicious hackers wasted no time exploiting a nasty code-execution vulnerability recently disclosed in WinRAR, a Windows file-compression program with 500 million users worldwide. The in-the-wild attacks install malware that, at the time this post was going live, was undetected by the vast majority of antivirus product.

The flaw, disclosed last month by Check Point Research, garnered instant mass attention because it made it possible for attackers to surreptitiously install persistent malicious applications when a target opened a compressed ZIP file using any version of WinRAR released over the past 19 years. The absolute path traversal made it possible for archive files to extract to the Windows startup folder (or any other folder of the archive creator’s choosing) without generating a warning. From there, malicious payloads would automatically be run the next time the computer rebooted.

On Thursday, a researcher at McAfee reported that the security firm identified “100 unique exploits and counting” in the first week since the vulnerability was disclosed. So far, most of the initial targets were located in the US.

“One recent example piggybacks on a bootlegged copy of Ariana Grande’s hit album Thank U, Next with a file name of ‘Ariana_Grande-thank_u,_next(2019)_[320].rar,’” McAfee Research Architect Craig Schmugar wrote in the post. “When a vulnerable version of WinRAR is used to extract the contents of this archive, a malicious payload is created in the Startup folder behind the scenes. User Access Control (UAC) is bypassed, so no alert is displayed to the user. The next time the system restarts, the malware is run.”

Screenshots included in the post show that the malicious file extracts benign MP3 files to the target’s download folder. Under the hood, however, the RAR file also extracted a file titled “hi.exe” to the startup folder. Once the computer was rebooted, it installed a generic trojan that, according to the Google-owned VirusTotal service, was detected by just nine AV providers. Schmugar didn’t say if all 100 exploits McAfee identified install the same malware.

Web searches such as this one show that an Ariana Grande RAR file with the same title identified by McAfee is currently circulating on BitTorrent download services. They’re also being advertised on Twitter. People should be reflexively suspicious of any file offered for download online. WinRAR users should ensure at once they are using version 5.70. Any other version is vulnerable to these attacks. Another solution is to switch to 7zip.

So, the solution looks easy enough: update to Winrar 5.70 or higher! Your current key should work for this latest version. Currently Winrar 5.71 beta 2 is available from rarlabs.com website.

 

EDITED:

57 minutes ago, Rædwulf said:

solution is just simply use 7-zip.. ;)

Yes, it is a great solution, but a problem might have several solutions. Having an updated Winrar 5.70 or over for free is just another valid solution. :cool:

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48 minutes ago, luisam said:

So, the solution looks easy enough: update to Winrar 5.70 or higher! Your current key sshould work for this latest version. Currently Winrar 5.71 beta 2 is available from rarlabs.com website.

solution is just simply use 7-zip.. ;)

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yeah the 4 series winrar has trouble with anything compressed with the 5 series program. Also a lot of uploaders no longer use recovery record whilst compressing files.

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