diff --git a/descriptions/AntiCheat.NetEase_Yidun.md b/descriptions/AntiCheat.NetEase_Yidun.md
new file mode 100644
index 000000000..701bbfc5f
--- /dev/null
+++ b/descriptions/AntiCheat.NetEase_Yidun.md
@@ -0,0 +1 @@
+[**NetEase Yidun**](https://dun.163.com/locale/en) is an anti-cheat technology developed by NetEase with a moderation suite.
diff --git a/rules.ini b/rules.ini
index 853020062..1b63eadc6 100644
--- a/rules.ini
+++ b/rules.ini
@@ -249,6 +249,7 @@ EQU8 = (?:^|/)equ8_conf\.json$
 FredaikisAntiCheat = (?:^|/)FredaikisAntiCheat/
 HackShield = (?:^|/)HShield/HSInst\.dll$
 NetEase_AntiCheatExperts = (?:^|/)NeacSafe64(?:_ex)?\.sys$
+NetEase_Yidun = (?:^|/)NEP2\.dll$
 nProtect_GameGuard = (?:^|/)gameguard\.des$
 PunkBuster[] = (?:^|/)(?:PnkBstrA|pbsvc)\.exe$
 PunkBuster[] = (?:^|/)pbsv\.dll$
diff --git a/tests/types/AntiCheat.NetEase_Yidun.txt b/tests/types/AntiCheat.NetEase_Yidun.txt
new file mode 100644
index 000000000..92dd961a6
--- /dev/null
+++ b/tests/types/AntiCheat.NetEase_Yidun.txt
@@ -0,0 +1,2 @@
+/NEP2.dll
+NEP2.dll
diff --git a/tests/types/_NonMatchingTests.txt b/tests/types/_NonMatchingTests.txt
index a4fa44c93..b60344447 100644
--- a/tests/types/_NonMatchingTests.txt
+++ b/tests/types/_NonMatchingTests.txt
@@ -506,6 +506,8 @@ sub/dir/PCTouchHelper.dl
 _CommonRedist/FXNA
 .esf
 startpos.esf
+nepnep2.dll
+nep2.dller
 data/campaigns/episodic_1/startpos_esf
 data/campaigns/episodic_1/startpos.esff
 XSDL.dll