what is Bash_history that says Echo Hacked!

stuckonios wrote:

clean my mac installed recommended clearing bash_ history with the message saying ECHO HACKED! what does this mean?

The shell history files are normal and expected, and I’d certainly not want mine cleared.

And replacing the history file with that is just… hilarious.

Add-on cleaners, add-on anti-malware apps, add-on first-few-hops VPNs unfortunately tend to add problems and issues (such as the case here), and add concerns and fears and noise (such as the case here), and while not providing solutions over the existing tooling (such as the case here).

One of the well-known add-on anti-malware apps was directly caught selling their users’ personally-identified web browsing and web purchasing history, and others selling that data would not surprise. Other anti-malware was merrily mis-detecting and trying to delete part of macOS itself, and (amusingly) the built-in anti-malware was preventing the add-on anti-malware from corrupting macOS itself.

The built-in cleaning and the built-in anti-malware tools, and features such as iCloud+ Private Relay for privacy, work fine. Add-ons, well, not so much. And again, what do the add-on apps actually add?

bash ("Bourne Again Shell") is a command line interpreter. It keeps a record (.bash_history) of recent commands.

echo is a command to print text or environment variables. E.g.,

bash-3.2$ echo The cat meowed loudly for dinner
The cat meowed loudly for dinner
bash-3.2$ echo $PATH
/usr/local/bin:/System/Cryptexes/App/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin

After I issued these commands in a bash shell,

echo The cat meowed loudly for dinner
echo $PATH

showed up in .bash_history.  If your .bash_history contains

echo HACKED!

It means that some program ran a shell command to print the message HACKED! What program that would be, I don't know. The "echo" command itself would not be dangerous – but if printing that message was one part of a "phishing" scam designed to frighten you into contacting criminals for "help" in fixing a supposed problem, falling for that would not be a good idea.

stuckonios wrote:

clean my mac installed recommended clearing bash_ history with the message saying ECHO HACKED! what does this mean?

Uninstall CleanMyMac. It is not needed and such third party apps may cause problems.

Just to add to Bob's comment....with Clean My Mac (or any other anti-virus, optimizer, or "cleaner" application) it's not a question of IF they will cause issues....it's just a matter of WHEN.

And IF you elect to delete Clean My Mac, you'll want to run their uninstaller, as simply dragging the application to the trash won't get rid of everything.

Clean My Mac is 3rd party software. Very few people in this forum use it. You will have to contact them directly for any questions.

I can tell you that a bash history file is just a tiny text file. There is absolutely no reason it would ever need to be "cleaned".

In most cases, I’d initially doubt Spectrum or any other specific ISP was an issue, as weak passwords, re-used passwords, and phishing and spearphishing all tend to be more common.

If you don’t trust the Spectrum configurations to not be compromised arising from Spectrum support, then switch those devices into bridged mode and install your own network gear. Gear-level exploits leading to Mac or iPhone exploits are difficult, absent physical access, and absent badly down-revision gear.

And stalkers and injunctions are a civil or criminal matter, not something that can be easily addressed around here through technical means. Particularly given your direct discussions with Apple Support about your security—Apple will almost certainly have provided appropriate suggestions and feedback.

And I’d avoid add-on security apps and add-on cleaners and add-on first-few-hops VPNs and such, as those can introduce issues and even vulnerabilities, and far too often noise. In the case of the bash history file, you’re already massively compromised if an adversary is in a position to even view that file. They’re effectively logged in and able to execute code or commands of their choosing. That’s Bad.