diff --git a/2018/2018.02.01.operation-pzchao/Bitdefender-Business-2017-WhitePaper-PZCHAO-crea2452-en-EN-GenericUse.pdf b/2018/2018.02.01.operation-pzchao/Bitdefender-Business-2017-WhitePaper-PZCHAO-crea2452-en-EN-GenericUse.pdf
deleted file mode 100644
index d1e3e7e..0000000
Binary files a/2018/2018.02.01.operation-pzchao/Bitdefender-Business-2017-WhitePaper-PZCHAO-crea2452-en-EN-GenericUse.pdf and /dev/null differ
diff --git a/2018/2018.02.01.operation-pzchao/samples/0ccc0fec930917707cf8573f4c5d0845197b95e300f8692757060910e50a1de6.zip b/2018/2018.02.01.operation-pzchao/samples/0ccc0fec930917707cf8573f4c5d0845197b95e300f8692757060910e50a1de6.zip
deleted file mode 100644
index 458ea69..0000000
Binary files a/2018/2018.02.01.operation-pzchao/samples/0ccc0fec930917707cf8573f4c5d0845197b95e300f8692757060910e50a1de6.zip and /dev/null differ
diff --git a/2018/2018.02.01.operation-pzchao/samples/19841507ccf88d717a09bbba06a36644f1a555d1a53a11a2dea384bfccb9749f.zip b/2018/2018.02.01.operation-pzchao/samples/19841507ccf88d717a09bbba06a36644f1a555d1a53a11a2dea384bfccb9749f.zip
deleted file mode 100644
index 04bc9ac..0000000
Binary files a/2018/2018.02.01.operation-pzchao/samples/19841507ccf88d717a09bbba06a36644f1a555d1a53a11a2dea384bfccb9749f.zip and /dev/null differ
diff --git a/2018/2018.02.01.operation-pzchao/samples/2234a0ecb268aa8a855b23ad0c12cf39d1a18768c857ff6b8cd7af5e2f694525.zip b/2018/2018.02.01.operation-pzchao/samples/2234a0ecb268aa8a855b23ad0c12cf39d1a18768c857ff6b8cd7af5e2f694525.zip
deleted file mode 100644
index c207f40..0000000
Binary files a/2018/2018.02.01.operation-pzchao/samples/2234a0ecb268aa8a855b23ad0c12cf39d1a18768c857ff6b8cd7af5e2f694525.zip and /dev/null differ
diff --git a/2018/2018.02.01.operation-pzchao/samples/698db26e6f87e19dae93034fb9e1543e8675135e6da85120de20ab6ebbe9f30b.zip b/2018/2018.02.01.operation-pzchao/samples/698db26e6f87e19dae93034fb9e1543e8675135e6da85120de20ab6ebbe9f30b.zip
deleted file mode 100644
index e7ecc08..0000000
Binary files a/2018/2018.02.01.operation-pzchao/samples/698db26e6f87e19dae93034fb9e1543e8675135e6da85120de20ab6ebbe9f30b.zip and /dev/null differ
diff --git a/2018/2018.02.01.operation-pzchao/samples/718f9ca7a38a15b0d34a29a0b8b50c88bea9d67501ca6e2ae96fbc79edecdb9d.zip b/2018/2018.02.01.operation-pzchao/samples/718f9ca7a38a15b0d34a29a0b8b50c88bea9d67501ca6e2ae96fbc79edecdb9d.zip
deleted file mode 100644
index fc653ec..0000000
Binary files a/2018/2018.02.01.operation-pzchao/samples/718f9ca7a38a15b0d34a29a0b8b50c88bea9d67501ca6e2ae96fbc79edecdb9d.zip and /dev/null differ
diff --git a/2018/2018.02.01.operation-pzchao/samples/7b33a8c1184683f94598b4bb558f5050d5512b2cb66efa27d58322b97cf5569c.zip b/2018/2018.02.01.operation-pzchao/samples/7b33a8c1184683f94598b4bb558f5050d5512b2cb66efa27d58322b97cf5569c.zip
deleted file mode 100644
index 62a887a..0000000
Binary files a/2018/2018.02.01.operation-pzchao/samples/7b33a8c1184683f94598b4bb558f5050d5512b2cb66efa27d58322b97cf5569c.zip and /dev/null differ
diff --git a/2018/2018.02.01.operation-pzchao/samples/a1ea427062bc9c497ed0660845c7e395500bf3d7f2f64c2a3f1137437d8ab6c9.zip b/2018/2018.02.01.operation-pzchao/samples/a1ea427062bc9c497ed0660845c7e395500bf3d7f2f64c2a3f1137437d8ab6c9.zip
deleted file mode 100644
index f8ba742..0000000
Binary files a/2018/2018.02.01.operation-pzchao/samples/a1ea427062bc9c497ed0660845c7e395500bf3d7f2f64c2a3f1137437d8ab6c9.zip and /dev/null differ
diff --git a/2018/2018.02.01.operation-pzchao/samples/ba2ffb1ff4003db3fdf3cf48b38b3ba6c447844b4399781cbb930fc9e11c23a4.zip b/2018/2018.02.01.operation-pzchao/samples/ba2ffb1ff4003db3fdf3cf48b38b3ba6c447844b4399781cbb930fc9e11c23a4.zip
deleted file mode 100644
index 9535d73..0000000
Binary files a/2018/2018.02.01.operation-pzchao/samples/ba2ffb1ff4003db3fdf3cf48b38b3ba6c447844b4399781cbb930fc9e11c23a4.zip and /dev/null differ
diff --git a/2018/2018.02.01.operation-pzchao/samples/d2591f4fe1c65e687c69cac007af27d24f656af5bc8eb8ff20064264fb71d56b.zip b/2018/2018.02.01.operation-pzchao/samples/d2591f4fe1c65e687c69cac007af27d24f656af5bc8eb8ff20064264fb71d56b.zip
deleted file mode 100644
index 952dd82..0000000
Binary files a/2018/2018.02.01.operation-pzchao/samples/d2591f4fe1c65e687c69cac007af27d24f656af5bc8eb8ff20064264fb71d56b.zip and /dev/null differ
diff --git a/2018/2018.02.01.operation-pzchao/samples/d7c0d5f399cf3f6738373aa72a5624352ce9eec1d2420c2aa91f73c565b721fd.zip b/2018/2018.02.01.operation-pzchao/samples/d7c0d5f399cf3f6738373aa72a5624352ce9eec1d2420c2aa91f73c565b721fd.zip
deleted file mode 100644
index a32f63d..0000000
Binary files a/2018/2018.02.01.operation-pzchao/samples/d7c0d5f399cf3f6738373aa72a5624352ce9eec1d2420c2aa91f73c565b721fd.zip and /dev/null differ
diff --git a/2018/2018.02.01.operation-pzchao/samples/da4f90ad50df05899bbcb7e9359da4541f989c57602ad2705eef1d561c99cfc3.zip b/2018/2018.02.01.operation-pzchao/samples/da4f90ad50df05899bbcb7e9359da4541f989c57602ad2705eef1d561c99cfc3.zip
deleted file mode 100644
index 56aac11..0000000
Binary files a/2018/2018.02.01.operation-pzchao/samples/da4f90ad50df05899bbcb7e9359da4541f989c57602ad2705eef1d561c99cfc3.zip and /dev/null differ
diff --git a/2018/2018.02.01.operation-pzchao/samples/fb602ff538f71c04b2c8271514b3923d72543ed92e717c046884f3eb1317e2af.zip b/2018/2018.02.01.operation-pzchao/samples/fb602ff538f71c04b2c8271514b3923d72543ed92e717c046884f3eb1317e2af.zip
deleted file mode 100644
index 90bb053..0000000
Binary files a/2018/2018.02.01.operation-pzchao/samples/fb602ff538f71c04b2c8271514b3923d72543ed92e717c046884f3eb1317e2af.zip and /dev/null differ
diff --git a/README.md b/README.md
index 8c8d8c3..9847096 100644
--- a/README.md
+++ b/README.md
@@ -571,7 +571,6 @@ APT28 group](http://csecybsec.com/download/zlab/20180713_CSE_APT28_X-Agent_Op-Ro
 * Feb 13 - [[RSA] Lotus Blossom Continues ASEAN Targeting](https://community.rsa.com/community/products/netwitness/blog/2018/02/13/lotus-blossom-continues-asean-targeting) | [:closed_book:](../../blob/master/2018/2018.02.13.Lotus-Blossom-Continues) 
 * Feb 07 - [[CISCO] Targeted Attacks In The Middle East](http://blog.talosintelligence.com/2018/02/targeted-attacks-in-middle-east.html) | [:closed_book:](../../blob/master/2018/2018.02.07.targeted-attacks-in-middle-east_VBS_CAMPAIGN)  
 * Feb 02 - [[McAfee] Gold Dragon Widens Olympics Malware Attacks, Gains Permanent Presence on Victims’ Systems](https://securingtomorrow.mcafee.com/mcafee-labs/gold-dragon-widens-olympics-malware-attacks-gains-permanent-presence-on-victims-systems/) | [:closed_book:](../../blob/master/2018/2018.02.02.gold-dragon-widens-olympics-malware)  
-* Feb 01 - [[Bitdefender] Operation PZChao: a possible return of the Iron Tiger APT](https://labs.bitdefender.com/2018/02/operation-pzchao-a-possible-return-of-the-iron-tiger-apt/) | [:closed_book:](../../blob/master/2018/2018.02.01.operation-pzchao)  
 * Jan 30 - [[Palo Alto Networks] Comnie Continues to Target Organizations in East Asia](https://researchcenter.paloaltonetworks.com/2018/01/unit42-comnie-continues-target-organizations-east-asia/) | [:closed_book:](../../blob/master/2018/2018.01.31.Comnie_Continues_to_Target_Organizations_in_East_Asia)  
 * Jan 30 - [[RSA] APT32 Continues ASEAN Targeting](https://community.rsa.com/community/products/netwitness/blog/2018/01/30/apt32-continues-asean-targeting) | [:closed_book:](../../blob/master/2018/2018.01.30.APT32_Continues_ASEAN_Targeting)  
 * Jan 29 - [[Trend Micro] Hacking Group Spies on Android Users in India Using PoriewSpy](https://blog.trendmicro.com/trendlabs-security-intelligence/hacking-group-spies-android-users-india-using-poriewspy/) | [:closed_book:](../../blob/master/2018/2018.01.29.PoriewSpy.India)