The AbuseFilter extension can block uploads based on SHA-1 hash. I don't believe the UploadBlacklist extension is still necessary and I propose removing the following lines:
from https://noc.wikimedia.org/conf/CommonSettings.php.txt:
include( $IP . '/extensions/UploadBlacklist/UploadBlacklist.php' );
Upload spam system
// SHA-1 hashes of blocked files:
FIXME should check file size too
$ubUploadBlacklist = array(
Goatse:
'aebbf277146e497c036937d3c3d6d0cac49a37a8', 20050901082002!Patoo.jpg
Spam:
'7740dab676725bcf6ea58b03b231aa4ec6c7ff34', Austriaflaggemodern.jpg
'1f1c44af6ee4f6e4b6cb48b892e625fa52238bd1', Nostalgieplattenspielerei.jpg
'e6eb4549756b88e2c69171ffbd278be51c3e2bfe', Patioboy.jpg
'eeb9b16edb9b5e9c58f47a558589e7eb970f32c0', Shoessss.jpg, 73464736474847367.jpg
'14e4858e63b008a7e087f2b90d3f57c021ab0f78', Vacuumbigmell.jpg
'f989e303ef505c4706db42d5cdad67841042e2b9', 998_pre_1.jpg
Ass pus:
'27979159b13b819d1bf62e1071a0c2a54b373ed5', Squish.png
'7176aeddf3d7d8aada785721773ffeb7ee7b292e', 20050905221505!Linguistics_stub.png *
'27979159b13b819d1bf62e1071a0c2a54b373ed5', 20050905235133!Leaf.png
'bb3acc61413ef813453a4b0c0198e30b2cd8fcf9', Kitty100.jpg
'855e55c4925644aeaef262ef25dd00815761c076', Wikipedia-logo-100px
'203bc24e5291e543779201734c49cfd88fcb2445', Wikipodia-logo.png
'14d2a0c0f3081815d04493f72ab5970c51422bc7', Bung.jpg
'3c610bc87d0ba49467c6f2d3cfba4b3321f6b351', Blue_morpho_butterfly_300x271.png
'7176aeddf3d7d8aada785721773ffeb7ee7b292e', 20050905235450!Blue_morpho_butterfly_300x271.png
'7a7f9d7ef52ed8967cb6b0171ef8d45e2a0c68b9', Leaf.png
'1ecfaf883c4130e1827290ad063158d0037631e6', Wikimedia-button1.png
'1c73d6596685175a8af6b08508468252c4dff8e2', Windbuchencom.jpg
'203bc24e5291e543779201734c49cfd88fcb2445', Leaf.png
'95d825bcf01ca3e553f4175dd7238ff12ba1d153', 20050915055251!New_Orleans_Survivor_Flyover.jpg
'bbd292d917d7fa7dec9a524de77ca39bd8cdf738', // 20050915060435!New_Orleans_Survivor_Flyover.jpg
Some singnet guy
'bed74eef04f5b54884dc650679e5688c7c1f74cb', Peniscut.jpg
);
from https://noc.wikimedia.org/conf/InitialiseSettings.php.txt:
'UploadBlacklist' => "udp://$wmfUdp2logDest/upload-blacklist",
This will help reduce our technical debt.
Version: wmf-deployment
Severity: enhancement
Whiteboard: technical-debt