diff --git a/Makefile b/Makefile
index 8a94d9205..5fa2874bd 100644
--- a/Makefile
+++ b/Makefile
@@ -278,6 +278,9 @@ define clean-network
 	rm -rf build/data/shared_$(1)*/*.log
 endef
 
+###
+### medalla
+###
 medalla: | beacon_node signing_process
 	$(call connect_to_network,medalla)
 
@@ -301,6 +304,9 @@ medalla-deposit: | beacon_node signing_process deposit_contract
 clean-medalla:
 	$(call clean_network,medalla)
 
+###
+### spadina
+###
 spadina: | beacon_node signing_process
 	$(call connect_to_network,spadina)
 
@@ -324,6 +330,32 @@ spadina-deposit: | beacon_node signing_process deposit_contract
 clean-spadina:
 	$(call clean_network,spadina)
 
+###
+### attacknet-beta1-mc-0
+###
+attacknet-beta1-mc-0: | beacon_node signing_process
+	$(call connect_to_network,attacknet-beta1-mc-0)
+
+attacknet-beta1-mc-0-vc: | beacon_node signing_process validator_client
+	$(call connect_to_network_with_validator_client,attacknet-beta1-mc-0)
+
+ifneq ($(LOG_LEVEL), TRACE)
+attacknet-beta1-mc-0-dev:
+	+ "$(MAKE)" LOG_LEVEL=TRACE $@
+else
+attacknet-beta1-mc-0-dev: | beacon_node signing_process
+	$(call connect_to_network_in_dev_mode,attacknet-beta1-mc-0)
+endif
+
+attacknet-beta1-mc-0-deposit-data: | beacon_node signing_process deposit_contract
+	$(call made_deposit_data,attacknet-beta1-mc-0)
+
+attacknet-beta1-mc-0-deposit: | beacon_node signing_process deposit_contract
+	$(call made_deposit,attacknet-beta1-mc-0)
+
+clean-attacknet-beta1-mc-0:
+	$(call clean_network,attacknet-beta1-mc-0)
+
 ctail: | build deps
 	mkdir -p vendor/.nimble/bin/
 	$(ENV_SCRIPT) nim -d:danger -o:vendor/.nimble/bin/ctail c vendor/nim-chronicles-tail/ctail.nim
diff --git a/beacon_chain/network_metadata.nim b/beacon_chain/network_metadata.nim
index d90636c94..1e12a363e 100644
--- a/beacon_chain/network_metadata.nim
+++ b/beacon_chain/network_metadata.nim
@@ -165,6 +165,7 @@ const
   spadinaMetadata* = eth2testnet "shared/spadina"
   testnet0Metadata* = eth2testnet "nimbus/testnet0"
   testnet1Metadata* = eth2testnet "nimbus/testnet1"
+  attacknetMc0Metadata* = eth2testnet "shared/attacknet-beta1-mc-0"
 
 {.pop.} # the following pocedures raise more than just `Defect`
 
@@ -177,6 +178,8 @@ proc getMetadataForNetwork*(networkName: string): Eth2NetworkMetadata =
         medallaMetadata
       of "spadina":
         spadinaMetadata
+      of "attacknet-beta1-mc-0":
+        attacknetMc0Metadata
       of "testnet0":
         testnet0Metadata
       of "testnet1":
diff --git a/vendor/eth2-testnets b/vendor/eth2-testnets
index 3a50f99ab..f04512f15 160000
--- a/vendor/eth2-testnets
+++ b/vendor/eth2-testnets
@@ -1 +1 @@
-Subproject commit 3a50f99abdcc8303096b4973b61712b6de37bfb0
+Subproject commit f04512f15adccfc01b68f15c6216d681d08a1f83