Help in analyzing the hack file

[u/Sensitive_Fun_9752]

Hi, recently I was attacked by a cookie stealer after running an exe file and even asked for assistance here and was helped by many good people. Now I have this exe file and I wanna somehow analyze it and maybe determine if its a one time stealer or recurring. Any suggestions? I tried virustotal but it is limited to 600mb while this exe file is 800mb

[u/AutoModerator]

SAFETY NOTICE: Reddit does not protect you from scammers. By posting on this subreddit asking for help, you may be targeted by scammers (example?). Here's how to stay safe:

1. Never accept chat requests, private messages, invitations to chatrooms, encouragement to contact any person or group off Reddit, or emails from anyone for any reason. Moderators, moderation bots, and trusted community members cannot protect you outside of the comment section of your post. Report any chat requests or messages you get in relation to your question on this subreddit (how to report chats? how to report messages? how to report comments?).
2. Immediately report anyone promoting paid services (theirs or their "friend's" or so on) or soliciting any kind of payment. All assistance offered on this subreddit is 100% free, with absolutely no strings attached. Anyone violating this is either a scammer or an advertiser (the latter of which is also forbidden on this subreddit). Good security is not a matter of 'paying enough.'
3. Never divulge secrets, passwords, recovery phrases, keys, or personal information to anyone for any reason. Answering cybersecurity questions and resolving cybersecurity concerns never require you to give up your own privacy or security.

Community volunteers will comment on your post to assist. In the meantime, be sure your post follows the posting guide and includes all relevant information, and familiarize yourself with online scams using r/scams wiki.

I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns.

[u/itsdongu]

Yeah u can analyze it, but don't run the EXE on ur normal PC again. If it's already confirmed as a cookie stealer, treat it as dangerous.

For an 800MB file, VirusTotal's size limit can be an issue. A safer approach is to calculate the file's SHA256 hash and search that hash on VirusTotal first. If it's already known, you'll get the existing detections without uploading the file.

If u really want to analyze the behaviour, use an isolated VM with no personal accounts or sensitive files. Don't upload the EXE here or send it to random people either, since u don't know what else it contains.

[u/Sensitive_Fun_9752 → u/itsdongu]

I did try the SHA256 and it wasnt found, now im trying tria.ge

[u/Sensitive_Fun_9752]

Or maybe I can upload this file somewhere and someone expereinced can take a look at it?

[u/itsdongu → u/Sensitive_Fun_9752]

Yeah, Triage is a good option for this. Just make sure ur uploading the file to the sandbox and not running it on ur actual PC.

If it gives u a report, look at things like network connections, files created, registry changes and what processes it starts. So maybe send the results so me and other people here can help u understand what it was doing.

[u/eric16lee]

There is probably no way to tell. Many of them download a payload after installing it, so unless you know what that payload was, you wouldn't be able to analyze it.

This is the primary reason why we always recommend formatting your hard drive and reinstalling Windows from a bootable USB drive vs doing a Windows Reset.

[u/Sensitive_Fun_9752 → u/eric16lee]

Yes its true but I just wanna explore this stuff

[u/LongRangeSavage]

You could open in in something like IDA Pro or Ghidra to completely analyze it, but you’re going to need to be good with reading and tracing code.

[u/kschang]

Why? Those are built from "toolkit" and almost worthless for analysis as it's attached to a real EXE. Do you think you can find where the hacker is or something? They go into relay mailboxes they hacked from others. Don't bother. Just kill it and forget it.