Opera 73.0.3827.0 developer update

[burnout426]

burnout426 Volunteer @kened last edited by burnout426

@kened What I know right now is that Windows Defender doesn't think it's malware or a virus. It just tags it as a potentially unwanted program. It's detected as BrowserModifier:Win32/Foxiebro. I can understand that as the Opera installer actions can and do modify Opera. So, it is indeed a "BrowserModifier", technically. The weird thing is it just started happening recently. I'm not sure if it's due to a definition update for Windows Defender where they have stricter rules or just a change (it'd be a safe change) in Opera's installer actions that triggers Defender now. And, remember. No other anti-virus does this.

If you're sure you don't have any real BrowserModifier:Win32/Foxiebro infections on your computer, you can allow the threat in Windows Defender until this gets sorted.

Reading the "Unwanted Software" section at https://docs.microsoft.com/en-us/windows/security/threat-protection/intelligence/criteria leads me to believe that Defender wants something in Opera's installer to be user-initiated in some way. Opera might just have to change something with one of its installer functions (when checking/doing updates etc.) to work around the detection and make Defender happy. But, we'll have to wait and see what Opera says.

[leocg]

leocg Moderator Volunteer @kened last edited by

@kened What is happening is that this time the antivirus giving, possibly, the false positive is one more widely used.

[kened]

kened Banned @burnout426 last edited by

@burnout426: I hope so.

[kened]

kened Banned @leocg last edited by

@leocg: I think it's a little more complicated than that.
I repeat: I was unable to uninstall Opera Developer. I had to remove all folders related to it. But I really hope it was just a false positive.

[kened]

kened Banned @leocg last edited by

@leocg: Probably, in the next few hours we will have a new build. We'll know better what's happening.

[gmiazga]

gmiazga Opera last edited by

Microsoft removed this detection. Their full reply:

We have removed the detection. Please follow the steps below to clear cached detection and obtain the latest malware definitions.

1. Open command prompt as administrator and change directory to c:\Program Files\Windows Defender
2. Run “MpCmdRun.exe -removedefinitions -dynamicsignatures”
3. Run "MpCmdRun.exe -SignatureUpdate"

Alternatively, the latest definition is available for download here: https://www.microsoft.com/en-us/wdsi/definitions

From our side there have been small changes in installer code on developer which probably got detected as malware together with Microsoft definitions update done on 2-3 October.

[kened]

kened Banned @gmiazga last edited by

@gmiazga: It's good to know that.

[kened]

kened Banned @gmiazga last edited by

@gmiazga: The procedure worked here. I'll wait for the next build to see what happens.

[burnout426]

burnout426 Volunteer @gmiazga last edited by

@gmiazga I made sure to remove the threat from "allowed threats" so that I can test if there's still a problem or not. All good so far after doing the commands. Opera Developer isn't trigger Windows Defender anymore.

[burnout426]

burnout426 Volunteer @burnout426 last edited by burnout426

@burnout426 However, if I right-click the Opera installer dll that I had saved and choose to scan it with Defender, it still detects the dll as being infected.

[tr3x]

tr3x @gmiazga last edited by

@gmiazga cool, thanks for resolving this

just for information, you have to run the commands like

.\MpCmdRun.exe -removedefinitions -dynamicsignatures
.\MpCmdRun.exe -SignatureUpdate

with '.' in the beginning because in another case you'll see 'The command MpCmdRun.exe was not found, but does exist in the current location' error

I executed the command, will monitor the further behavior

[burnout426]

burnout426 Volunteer @tr3x last edited by

@tr3x In Powershell I assume?

[ziegensatan]

ziegensatan @tr3x last edited by

@tr3x try open cmd with adminsitrator rights (right click -> run as admin)
cd c:\Program Files\Windows Defender
MpCmdRun.exe -removedefinitions -dynamicsignatures
MpCmdRun.exe -SignatureUpdate

[tr3x]

tr3x @burnout426 last edited by

@burnout426 yes, did that in Powershell, that's why dot slash was required

[tr3x]

tr3x @ziegensatan last edited by

@ziegensatan thanks, but I already ran the commands in powershell with dotslash in the beginning and there worked good

[l33t4opera]

l33t4opera last edited by

New update - 73.0.3834.0 ;-)

[craigsn]

craigsn @gmiazga last edited by

@gmiazga said in Opera 73.0.3827.0 developer update:

MpCmdRun.exe -SignatureUpdate

Thanks you for this update

[ghirahim]

ghirahim @ziegensatan last edited by

@ziegensatan: Thank you.

[A Former User]

A Former User last edited by

Good i stayed at Version 69 ..... everything still works.
Even my V7 Bookmarks extension...

[pclaudel1]

pclaudel1 @gmiazga last edited by

@gmiazga: Yes, as others have said, thank you for your assistance. You've really lifted a worry from my shoulders—that leaves just 1,300 more to go!