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Top_20_attacking_class_C.md

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DShield: Internet Storm Center

The ISC provides a free analysis and warning service to thousands of Internet users and organizations, and is actively working with Internet Service Providers to fight back against the most malicious attackers.

Top 20 attacking class C

This list summarizes the top 20 attacking class C (/24) subnets over the last three days. The number of 'attacks' indicates the number of targets reporting scans from this subnet.

IP Address

  • Website
  • https://www.dshield.org/
  • Source
  • https://www.dshield.org/block.txt
  • Data
  • Net Block
  • Format
  • Text
  • API/Token
  • None
  • Status
  • Ok
  • Comments
  • No comment
Sample Output of IntelMQ
{
  "feed": {
    "url": "https://www.dshield.org/block.txt",
    "accuracy": 100.0,
    "name": "DShield"
  },
  "extra": "{\"attacks\": 3049, \"network_name\": \"IUnet S.p.A.\"}",
  "time": {
    "source": "2016-07-07T12:38:15+00:00",
    "observation": "2016-07-07T12:04:18+00:00"
  },
  "source": {
    "abuse_contact": "l.cerbai@iunet.it",
    "geolocation": {
      "cc": "IT"
    },
    "network": "164.132.54.0/24"
  },
  "raw": "MTY0LjEzMi41NC4wCTE2NC4xMzIuNTQuMjU1CTI0CTMwNDkJSVVuZXQgUy5wLkEuCUlUCWwuY2VyYmFpQGl1bmV0Lml0",
  "classification": {
    "type": "blacklist"
  }
}

There's not only IP information in https://www.dshield.org/block.txt, but also more information like:

  • Number of targets scanned
  • Name of Network
  • Country
  • Contact email address

It looks like:

#   DShield.org Recommended Block List 
#    (c) 2007 DShield.org
#   some rights reserved. Details http://creativecommons.org/licenses/by-nc-sa/2.5/
#   use on your own risk. No warranties implied.
#   primary URL: http://feeds.dshield.org/block.txt
#     PGP Sign.: http://feeds.dshield.org/block.txt.asc
#
#   comments: info@dshield.org
#    updated: Tue Aug 30 07:11:21 2016 UTC
#   
#    This list summarizes the top 20 attacking class C (/24) subnets
#   over the last three days. The number of 'attacks' indicates the 
#   number of targets reporting scans from this subnet.
#
#
#    Columns (tab delimited):
#
#    (1) start of netblock  
#    (2) end of netblock
#    (3) subnet (/24 for class C)
#    (4) number of targets scanned
#    (5) name of Network 
#    (6) Country
#    (7) contact email address
#
#    If a range is assigned to multiple users, the first one is listed. 
#     
Start	End	Netblock	Attacks	Name	Country	email
124.232.156.0	124.232.156.255	24	6286	CHINANET-BACKBONE No.31,Jin-rong Street	CN	lzl@public.yc.nx.cn
209.126.136.0	209.126.136.255	24	2769	California Regional Internet, Inc.	US	abuse@cari.net
116.31.116.0	116.31.116.255	24	993	CHINANET-BACKBONE No.31,Jin-rong Street	CN	bad userid (abuse_gdnoc)bad userid (abuse_gdnoc)bad userid (abuse_gdnoc)IPMASTER is not for spam complaint,please send spam complaint to abuse_gdnoc@189.cn
# END
#
#  finished list generation: Tue Aug 30 07:11:22 2016 UTC