diff --git a/test/fisherman/block_manipulator/header_corrupter.cpp b/test/fisherman/block_manipulator/header_corrupter.cpp
index f019d070..5e5a1b6d 100644
--- a/test/fisherman/block_manipulator/header_corrupter.cpp
+++ b/test/fisherman/block_manipulator/header_corrupter.cpp
@@ -1,9 +1,34 @@
 #include "header_corrupter.hpp"
 
+#include "block/block-parse.h"
+#include "block/block-auto.h"
+
 namespace test::fisherman {
 
-auto HeaderCorrupter::Config::fromJson(td::JsonValue jv) -> Config {
-  return Config{};
+HeaderCorrupter::Config HeaderCorrupter::Config::fromJson(td::JsonValue jv) {
+  Config cfg;
+  CHECK(jv.type() == td::JsonValue::Type::Object);
+  auto &obj = jv.get_object();
+
+  cfg.distort_timestamp = td::get_json_object_bool_field(obj, "distort_timestamp", true, false).move_as_ok();
+  cfg.time_offset = td::get_json_object_int_field(obj, "time_offset", true, 999999999).move_as_ok();
+
+  cfg.mark_subshard_of_master =
+      td::get_json_object_bool_field(obj, "mark_subshard_of_master", true, false).move_as_ok();
+  cfg.invert_lt = td::get_json_object_bool_field(obj, "invert_lt", true, false).move_as_ok();
+  cfg.mark_keyblock_on_shard = td::get_json_object_bool_field(obj, "mark_keyblock_on_shard", true, false).move_as_ok();
+
+  cfg.force_after_merge_for_mc = td::get_json_object_bool_field(obj, "force_after_merge_for_mc", true, false).move_as_ok();
+  cfg.force_before_split_for_mc = td::get_json_object_bool_field(obj, "force_before_split_for_mc", true, false).move_as_ok();
+  cfg.force_after_split_for_mc = td::get_json_object_bool_field(obj, "force_after_split_for_mc", true, false).move_as_ok();
+  cfg.allow_both_after_merge_and_split =
+      td::get_json_object_bool_field(obj, "allow_both_after_merge_and_split", true, false).move_as_ok();
+
+  cfg.shard_pfx_zero_yet_after_split =
+      td::get_json_object_bool_field(obj, "shard_pfx_zero_yet_after_split", true, false).move_as_ok();
+
+  cfg.set_vert_seqno_incr = td::get_json_object_bool_field(obj, "set_vert_seqno_incr", true, false).move_as_ok();
+  return cfg;
 }
 
 HeaderCorrupter::HeaderCorrupter(Config config) : config_(std::move(config)) {
@@ -11,11 +36,81 @@ HeaderCorrupter::HeaderCorrupter(Config config) : config_(std::move(config)) {
 
 void HeaderCorrupter::modify(block::gen::Block::Record &block) {
   block::gen::BlockInfo::Record info_rec;
-  bool ok = block::gen::BlockInfo().cell_unpack(block.info, info_rec);
-  CHECK(ok);
-  info_rec.after_merge = true;
-  info_rec.after_split = true;
-  block::gen::BlockInfo().cell_pack(block.info, info_rec);
+  CHECK(block::gen::t_BlockInfo.cell_unpack(block.info, info_rec));
+
+  // 1) distort_timestamp => сдвигаем info_rec.gen_utime
+  if (config_.distort_timestamp) {
+    info_rec.gen_utime += config_.time_offset;
+  }
+
+  // 2) mark_subshard_of_master => если workchain == -1, делаем shard_pfx_bits != 0, то есть блок "подшард" MC
+  if (config_.mark_subshard_of_master) {
+    block::gen::ShardIdent::Record shard_rec;
+    CHECK(block::gen::ShardIdent().unpack(info_rec.shard.write(), shard_rec));
+    CHECK(shard_rec.workchain_id == -1 && !info_rec.not_master);
+    if (shard_rec.shard_pfx_bits == 0) {
+      shard_rec.shard_pfx_bits = 10;
+      shard_rec.shard_prefix = 123456ULL;
+    }
+    vm::CellBuilder cb;
+    CHECK(block::gen::t_ShardIdent.pack(cb, shard_rec));
+    info_rec.shard = td::Ref<vm::CellSlice>{true, cb.finalize()};
+  }
+
+  // 3) invert_lt => start_lt >= end_lt
+  if (config_.invert_lt) {
+    if (info_rec.start_lt < info_rec.end_lt) {
+      auto tmp = info_rec.start_lt;
+      info_rec.start_lt = info_rec.end_lt;
+      info_rec.end_lt = tmp;
+    }
+  }
+
+  // 4) mark_keyblock_on_shard => если "not_master" = true, то проставим key_block = true
+  if (config_.mark_keyblock_on_shard) {
+    CHECK(info_rec.not_master);
+    info_rec.key_block = true;
+  }
+
+  // 5) force_after_merge / force_before_split / force_after_split для MC
+  if (config_.force_after_merge_for_mc) {
+    CHECK(!info_rec.not_master);
+    info_rec.after_merge = true;
+  }
+  if (config_.force_before_split_for_mc) {
+    CHECK(!info_rec.not_master);
+    info_rec.before_split = true;
+  }
+  if (config_.force_after_split_for_mc) {
+    CHECK(!info_rec.not_master);
+    info_rec.after_split = true;
+  }
+
+  // 6) allow_both_after_merge_and_split => ставим after_merge=1 и after_split=1
+  if (config_.allow_both_after_merge_and_split) {
+    info_rec.after_merge = true;
+    info_rec.after_split = true;
+  }
+
+  // 7) shard_pfx_zero_yet_after_split => shard_pfx_bits=0, after_split=1
+  if (config_.shard_pfx_zero_yet_after_split) {
+    info_rec.after_split = true;
+    block::gen::ShardIdent::Record shard_rec;
+    CHECK(block::gen::ShardIdent().unpack(info_rec.shard.write(), shard_rec));
+    shard_rec.shard_pfx_bits = 0;
+    vm::CellBuilder cb;
+    CHECK(block::gen::t_ShardIdent.pack(cb, shard_rec));
+    info_rec.shard = td::Ref<vm::CellSlice>{true, cb.finalize()};
+  }
+
+  // 8) set_vert_seqno_incr => vert_seqno_incr != 0 => ставим true
+  if (config_.set_vert_seqno_incr) {
+    info_rec.vert_seq_no = 1;
+    info_rec.vert_seqno_incr = true;
+    info_rec.prev_vert_ref = info_rec.prev_ref;
+  }
+
+  CHECK(block::gen::t_BlockInfo.cell_pack(block.info, info_rec));
 }
 
 }  // namespace test::fisherman
diff --git a/test/fisherman/block_manipulator/header_corrupter.hpp b/test/fisherman/block_manipulator/header_corrupter.hpp
index 1fe0f4a6..4978252d 100644
--- a/test/fisherman/block_manipulator/header_corrupter.hpp
+++ b/test/fisherman/block_manipulator/header_corrupter.hpp
@@ -1,20 +1,36 @@
 #pragma once
 
 #include "base.hpp"
+
 #include "td/utils/JsonBuilder.h"
+#include "block/block-auto.h"
 
 namespace test::fisherman {
 
 class HeaderCorrupter : public BaseManipulator {
  public:
   struct Config {
-    // TODO: add corruption field and method
+    bool distort_timestamp = false;
+    td::int32 time_offset = 1'000'000'000;
 
-    static auto fromJson(td::JsonValue jv) -> Config;
+    bool mark_subshard_of_master = false;
+    bool invert_lt = false;
+    bool mark_keyblock_on_shard = false;
+
+    bool force_after_merge_for_mc = false;
+    bool force_before_split_for_mc = false;
+    bool force_after_split_for_mc = false;
+    bool allow_both_after_merge_and_split = false;
+
+    bool shard_pfx_zero_yet_after_split = false;
+
+    bool set_vert_seqno_incr = false;
+
+    static Config fromJson(td::JsonValue jv);
   };
 
   explicit HeaderCorrupter(Config config);
-  void modify(block::gen::Block::Record &block) final;
+  void modify(block::gen::Block::Record &block) override;
 
  private:
   Config config_;
diff --git a/test/fisherman/tests.cpp b/test/fisherman/tests.cpp
index 4a7249c9..362d0c0a 100644
--- a/test/fisherman/tests.cpp
+++ b/test/fisherman/tests.cpp
@@ -6,6 +6,14 @@
 
 using namespace test::fisherman;
 
+void print_block(const block::gen::Block::Record &block_rec) {
+  std::ostringstream os;
+  td::Ref<vm::Cell> block_cell_pack;
+  CHECK(block::gen::t_Block.cell_pack(block_cell_pack, block_rec));
+  block::gen::t_Block.print_ref(os, block_cell_pack);
+  LOG(INFO) << "Block = " << os.str();
+}
+
 auto main(int argc, char **argv) -> int {
   if (argc < 3) {
     std::cerr << "Usage: " << argv[0] << " /path/to/rootdb config.json\n";
@@ -51,30 +59,17 @@ auto main(int argc, char **argv) -> int {
   }
 
   auto blk_data = blk_data_result.move_as_ok();
-  LOG(INFO) << "BlockId: " << blk_data->block_id().to_str();
-  LOG(INFO) << "Block data size: " << blk_data->data().size() << " bytes";
-
-  LOG(INFO) << "Cell has block record = " << block::gen::Block().validate_ref(10000000, blk_data->root_cell()) << "\n";
-
-  std::ostringstream os;
-  block::gen::Block().print_ref(os, blk_data->root_cell());
-  LOG(INFO) << "Block = " << os.str();
 
   block::gen::Block::Record block_rec;
-  bool ok = block::gen::Block().cell_unpack(blk_data->root_cell(), block_rec);
-  CHECK(ok);
+  CHECK(block::gen::t_Block.cell_unpack(blk_data->root_cell(), block_rec));
 
-  block::gen::BlockInfo::Record info_rec;
-  block::gen::BlockInfo().cell_unpack(block_rec.info, info_rec);
-  LOG(INFO) << "Block.info after_merge=" << info_rec.after_merge << ", after_split=" << info_rec.after_split;
+  print_block(block_rec);
 
   auto manipulation_config = td::get_json_object_field(js_obj, "manipulation", td::JsonValue::Type::Object, false);
   CHECK(manipulation_config.is_ok());
   ManipulatorFactory().create(manipulation_config.move_as_ok())->modify(block_rec);
 
   LOG(INFO) << "Block after manipulation:";
-  block::gen::BlockInfo().cell_unpack(block_rec.info, info_rec);
-  LOG(INFO) << "Block.info after_merge=" << info_rec.after_merge << ", after_split=" << info_rec.after_split;
-
+  print_block(block_rec);
   return 0;
 }