Strange File in Downloads Folder? Gootloader Malware Analysis
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- Опубліковано 1 бер 2023
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I would love to see a series where you ask viewers to submit their own "malware" that they make with harmless payloads but using techniques like this so that you can dissect them to figure out how they work
Some youtuber have done this before but there's just so much trash that you would need someone just to filter
this sounds fun ngl
@@648 Who has done this before?
Please mention their name, I would be interested in watching such content.
@@foxdk danooct1 for example
@@foxdk enderman
That was a really interesting idea, to have extra malicious code in between the "real" code. Great Video!
Not as innovative as you believe
@@ShinigamiAnger well I took a big break from coding and malware stuff so I don't know how innovative or how smart it is. Sounded pretty smart to me!
@@tomasofficial. that's pretty common, but yeah the concept is really interesting!
I thought of this idea lol or just put the malware at the bottom
@@whathaveicreated1197 that's even older (and worse compared to blending and distributing it into actual code)
The part you called "randomness" in PowerShell was just some simple common PowerShell deobfuscation (pulling from essentially static items, like pulling portions of text from "Microsoft Windows" to deobfuscate), and then it compiled it to a C# code etc and it ran it with IEX near the end, alias for Invoke-Expression
This really doesn't look like much except an email-style malware dropper like I have been seeing since 2014, easy
This comment needs more likes. Thanks for the clarification!
>like pulling portions of text from "Microsoft Windows" to deobfuscate
interesting, can you please explain this more to me? i think im missing it.
@@gooniesfan7911 they will pull bits of text out of these strings in order to construct words that they can then reuse to make code to create more code and import things
Like they might use the "d" from "Windows" as part of "dll"
Or the "i" and "o" from "Microsoft" to be part of "invoke"
If they do that with enough words, then nothing is hardcoded in their code, and it makes it much more difficult to automatically scan for
@@KevinCrouch0 Thank you for such a clear answer man.
John, you never fail to amaze me with your ability to decode and expose the malicious intentions behind these tricky scripts. Your dedication to educating and keeping us safe from cyber threats is truly commendable. Keep shining a light on the dark corners of the internet! 👨💻💡
😮-)😊9
You literally know every single shortcut ever, shortcuts, libraries to help you and regex, what a skill set! Keep it up man!
This kind of stuff is really interesting to me. I don't quite have the dedication to learn all these little things and bits of knowledge, but it's always a fun watch to see someone break down how a piece of software functions. Keep it up!
@AtlasUltimate My Mate My Dear My Darling AAAH Just as i myself would like to phrase it.Well this kind of information technology stuff is really interesting to me. I also don't quite have the dedicationsince i myself been an Information Technology Graduate(thanks to my father decision :) to learn all these little nice technology thingys and bits of knowledge, but it's always a fun watch to see someone standup to the podium and magnificiently break down how a piece of software functions. Keep it up!
when you opened up the 40MB file, the extra nonsense is usually put to basically be to large for AV's to not detect it because they choke at large files.
This is exactly the reason why
Shows how shit your average AV is
I love watching you parse through these sort of scripts. It always looks like so much fun
I can help you to retrieve your hacked account
Hey man, I don’t usually comment, but I just want to thank you for your videos. This is the second video that has helped my analysts wrap their heads around an incident we have had. Your excitement and ability to simplify what you are explaining while still keeping it technical is so awesome. I look forward to seeing more of what you come out with. Thanks John!
I just really like that at 11:52 one of the variables is called "women3". There's a bit of code that's "while(women3)".
I don't know why this is so funny to me. I wonder if the variable names were randomly generated by an automatic obfuscator.
lol, i saw the same thing, was also caught off guard by a var called "+pee"
ive seen 'd01t_pusi' a few times looking at wierd code
This is basically crawling through the computer to find certain file information. They're probably looking for a specific target but also gathering any useful bit of information that they can use in the future. Those web domain are probably host that will obfuscate things even more and send them somewhere else. Probably to another domain or through onions. It was pretty interesting to see it still kind of worked without a it's proper cwscript. Which it needed to grab from the first 3 web domain. Probably have it hidden in plain text and the first level of attack knows how to scrape the plain text and assemble it into a readable script while obfuscating it at the same time. I'm also talking out of my ass.
Really nice. Like how you pull this apart in an easy and understandable way. Waiting for the next one.
I did not understand a single word that was said in this video but it's very entertaining, also it makes me worried if I have any nasty malware on my pc
That video was amazing thanks for that exploration John!
I'm just a regular PC user and most of that went over my head real quick, but you made it sound so interesting! I'm subscribing, maybe I'll actually learn something!
0:00: 💻 Unusual JavaScript file discovered in user's downloads folder prompts malware analysis.
3:27: ⚙️ File Analysis and Functionality Check
6:39: 🔍 Analysis of suspicious file behavior using process monitor.
10:22: 💻 Analysis of Suspicious File Behavior
13:56: 💻 Analysis of Custom Malware Development Training
17:34: 🔍 Uncovering suspicious activity and potential malware execution through C script and Powershell.
20:54: 🔍 Analysis of Suspicious File
24:43: 💻 Analysis of a new threat actor named Gootloader and its behavior in downloading malicious files.
27:46: 🔍 Analysis of suspicious files and potential malware activity in JavaScript libraries.
Recapped using Tammy AI
I am a complete novice in the software field, but listening and watching you go through this malware has been fascinating
Honestly I was expecting him to run it on a vm and title it "Downolading random files until my pc dies part 69"
Very nice to see the tear down of this. There's a ton of obfuscation!
Keep up the amazing work. Hope you don't get hurt by youtube's evil attempt to push shorts.
outside of YT's greed, shorts are a great feature imo
Evil? People who use hyperbole casually are super annoying.
Hey John, nice video and analysis as always!
Just curious, did you ever go back to those UserAssist reg values to see what they were? Any persistence perhaps? I don't think the mandiant and redcanary articles mentioned them.
Top notch cyber forensics content. This may not be my field of word but I enjoy watching these videos. Thanks for your work.
WOW, I came here from the interview with David Bombal and this is the first video I see. I am absolutely amazed at what is happening.
He got me on his computer 😳
Please dont extract me…
0:00
Hey John, if I wanted to work my way through your playlists to build foundational, working knowledge towards becoming a cyber security professional, where would you point me to? Your channel is 10/10 you've done incredibly well.
the part where you said would take a long time, and how you just want to see it explode, that's the part that is actually interesting to watch.
I understood "Control A" the rest was an alien language, when you executed the file I questioned "if I watch this will it spill over on my pc?" Wow this was entertaining, thank you Sir, AMAZING yet FREAKY.
12:05 "At the very top, there is stuff." The only thing I understood during the whole video. Jesus this looks complicated.
This man could really decode dino dna himself, no dr. Wu needed. Great video, did not follow it but man a crazy trip.
Thank's john, keep it up!
Some AV tools will avoid large payloads, eg some inline firewalls with a/v security and other options may not have enough ram to look at everything.
Great informative video. I barely understand any of this but it's still interesting how the process of analysis goes and what tools are used.
I probably unconsciously learned something here. 😋
John,
I would recommand you to stop using sysinternals tools bc new malware are checking process to know if you are running sysinternals
And run what other tools in their place?
That strange file is blowing my mind 🤯🤯🤯🤯🤯🤯🤯🤯🤯🤯
i got randomly recommended this video, and i got to say that youtube is on to something.
i didnt even realize im interested in malware, but youtube did
This is fascinating, I understand everything you are doing, but I had no idea that what you are doing was possible , I don't even knew the software you are using existed lol
Great work as usual. Probably dumb nbee question but would there be a way to set up a locally connected server with one of the domain names called out in the code to see what the exfiltrated info is and /or what other connections are established?
Aside from using tcpdump and nmap?
This is so awesome - learning so much.
You've probably heard this a million times but I'll say it anyway: You don't need to pipe cat into grep ;)
been needing this kind of info. epic.
in patch files, the lines that start with - are the ones that got removed, and the ones starting with + are the ones that got added
bro knows sublime like the back of his hand jeez
Could you do a video about remnux? I've never heard of it and would love to know about the benefits over just using a normal Linux VM for reversing malware.
i love this kind of videos !!.. Keep going.
These videos always inspire me. I kept getting emails that got past my Gmail spam subject just random letters etc opened it into a VM. Turns out just linked to some website that linked to a few bitcoin addresses with billions worth of coin based in Russia
Fascinating from both sides.
Meld is my favorite diff tool. Works great for git repositories
I am always of the opinion you can see and hear when someone is skilled in their abilities even if you do not speak that language, and this dude is skilled
Are you using administrative access to Windows? How is the script able to modify registry key?
Kind of a mishap here how you "safely" convert the code on the beautifier site outside of your VM... Is there a local or open source app you can add to your image with that capability?
The book you were reading was Volume 28 on Shelf 4 of Wall 1 of Hexagon: 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
"johnhammond
That was really cool to watch!
Interesting!!, Thanks John
This is so fun! The malware developer is really good at programming. Hope he or she does something good instead only evil. Such people are valuable for the society. They can make really good programs and have extensive knowledge about Windows API. The use of Javascript, Powershell with TLS 1.2 as outbound connection. Really awesome work, thanks John!
I think people turn rouge because of less opportunities or personal grudges.
12:22
The hilarious part and I love it XD
Awsome as ever. But do not pipe a file into grep with cat, when you can just use grep without it. ;o)
Helo . Thanks for great job . I have one question is there any possibilities how I can check on laptop any since of hacking my files ? I using Guardio Protection on laptop . But anyway how I can double check or everything is fine ?
as a malware enthusiast these videos are so amazingly entertaining
Very educational for , thank you!
Why don't you work with backup images like Acronis, if you are worried about infecting your VM? You can already have all your tools baked in to the image and flatten your testbed once you are done. Then there is no problem connecting to the internet.
Could you not edit the hosts file to add entries to a dummy local server (for the urls it visits to), that responds with 200, to keep the code going?
Would this diff (patches) would happen if i have my apps in a usb using bitlocker encription
I didn't catch the endgame of the malware? I saw it identified the names of the items on the desktop but not what it would do with anything?
I think the malware *posts* cookies to the websites linked. I dont know anything of code, but i do know it posts information to the websites because it only accepts POST.
Which books do you prefer to read for ethical hacking those who are beginners?(except network+)
John post the file-hash so we can follow along if needed.
I have a pc question, I can’t seem to turn on memory core integrity, even after restarting my system it says it’s off even tho it’s still toggled on. I’ve tried doing a roll back, and updating windows but it still says it’s off. Should I try reinstalling windows? Would it fix this issue or would I just be waisting my time?
So good video! Impressive!!
Great news man thanks 👍
I was looking for the Jurassic Park John Hammond but this is good enough
That maltebauer site is some type of movie review blog that was seemingly commandeered.
👍Thanks John
The insane number of characters in the interactions design.js was just to bloat the file so the anti-virus didn't check it right?
edit: lol nvmd I just had to get to the end of the video
I'm really curious how they store the code in the registry. My guess is it's arrays of hex that contain the bytes of the .exe
Csc.exe is the visual c command line compiler. Still wonder what it is compiling tough, maybe the random dats in the file?
Not sure if you're aware, but piping grep to cat is redundant. You can just use your grep flags/args followed by the filename and it will do the same thing.
Seth Rogen made a guest appearance at 18:33 🤣
can we get that file for practice?
Man with how many itch games I download I could just have a zip like that sitting in my downloads folder... Time to do a check
Everyone gangsta until powershell opens itself
Sir I asked a question . It is possible my mobile software update and I lost my all data like picture, video, contact , google gmail etc
I have a feeling the randomness of the Interaction Design.js is likely because it's hosted on a platform that is unable to virus scan large files like the google platform will refuse to scan large files, The feeling I have is if it makes the file big enough it can't scan it
I wonder if backloading that one .js file with junk code is an attempt to make the file unreadable to the average user, through either attempting to crash the text editor, or just increasing load time to a point where the average user would go "it's probably fine".
Having used in-editor prettifiers for decades that just format code on a single key shortcut or on save, i can't express how much it pains me to see you use online prettifiers or doing it by hand 🙈
Yep, started watching this video, and was under attack the second it started. I think we have some bad actors that must be out of work.
this is why we should nerf genji
Thx for this analysis. But actually i miss a very important part. How can we protect our windows machines so that in case a dumb user in our company tries to run the malware it is not executed?
How can i prevent that javascript code is executed? Thx for any comment.
Malwarebytes
25:09 it is javascript, not j-script.
Can you please do a review of the malware that's coming bundled with gta5 PC mods? There is some really hard core APT stuff going on under the hood such as permanently deleting the anti virus even and time bomb wiper malware that steals your passwords I recently found some that destroyed my whole install of windows.
All executable file attachments get deleted here. Same for all ZIP, RAR, MSI, CAB, etc.
12:10 crap is likely to skip scanning by windows av. Software like that have limits to not freeze your machine while scanning your 50GB wedding video, and that's why its likely that this bs at the end is to disguise it as some file to big to be scanned.
i wonder if chatgpt can do anything helpful, like trying to name all variables after the function they serve or finding malicious lines or giving you a summary of what the code does, it has done that for me before but I don't know how reliable it might be for that purpose
how to get procwatch?
John. I don’t understand a damn word you’re speaking. As a matter of fact, I have no business watching this. I have no idea how or why I’m here, and I have no idea how or why I’m 23 minutes balls deep into this video. But you bet your ass I’m gonna see this through John. None the lesser. Right? I think. I don’t know. Seems worth it. For reasons, that I will someday know. Thank you?
”everyone has a hank hill but no one has a good hank hill”..... Hank trill has entered the chat
process hacker 2 has all of these features
They probably padded the .js with random garbage at the end so that AVs would be less likely to scan it due to the file size.
I have 4gb of old viruses and malware. Analysed a few of them under DOS using debug. Burger virus, parity 411 etc.
You opened Task Scheduler, but you never went INTO the Task Library, you could have looked at the Scheduled Task there without messing with the dummy .exe file.
Was about to comment the same thing: You need to actually click the entries in the tree to see the tasks that are scheduled.
I suspected you didn't know what you were doing when you cat | grep'ed and the rest of the video proved me right.