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Forum Discussion
Unsigned Executable Muddies Water on Security Investigations
On Mac, an unsigned executable can muddy the water on security investigations.
/Library/DropboxHelperTools/Dropbox_u501/dbkextd
Whereas unsigned executables are a big attack vector for Mac, anything that is in here could be the source of an experienced security event. All legitimate software installed by a legitimate company should be signed to avoid this delay. Signing it would make it not appear suspicious in an investigation and save security incident responders precious moments. Being unsigned could also allude to the executable having been tampered with. If there is a signed version in the original files and the unsigned version exists in the system, then that is a far simpler check that than trying to reverse engineer the suspected unsigned executable to see what might have been wrapped into it. Long story short, signing all your files for your app makes our lives in security a lot less frustrating.
radical_exponentDropbox Engineer
Hi GreyMane,
Can you clarify what you're using to check the signature? My understanding is that that binary is and always has been code signed by Dropbox.
No, you are exactly correct. Apologies, it is a false positive in our Etre tool I will raise the issue with them!
Executable=/Library/DropboxHelperTools/Dropbox_u501/dbkextd
Identifier=com.getdropbox.dropbox.dbkextd
Format=Mach-O thin (arm64)
CodeDirectory v=20500 size=906 flags=0x10000(runtime) hashes=22+2 location=embedded
VersionPlatform=1
VersionMin=720896
VersionSDK=852736
Hash type=sha256 size=32
CandidateCDHash sha256=9d60b9eca42a1e70d88b44e403610ac477d4f239
CandidateCDHashFull sha256=9d60b9eca42a1e70d88b44e403610ac477d4f239665d9883084cf637ea789e7e
Hash choices=sha256
CMSDigest=9d60b9eca42a1e70d88b44e403610ac477d4f239665d9883084cf637ea789e7e
CMSDigestType=2
Page size=4096
CDHash=9d60b9eca42a1e70d88b44e403610ac477d4f239
Signature size=8996
Authority=Developer ID Application: Dropbox, Inc. (G7HH3F8CAK)
Authority=Developer ID Certification Authority
Authority=Apple Root CA
Timestamp=Jul 9, 2024 at 6:09:49 AM
Info.plist entries=14
TeamIdentifier=G7HH3F8CAK
Runtime Version=13.3.0
Sealed Resources=none
Internal requirements count=1 size=192
