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Exam 312-49 All Questions

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Exam 312-49 topic 1 question 38 discussion

Actual exam question from ECCouncil's 312-49
Question #: 38
Topic #: 1
[All 312-49 Questions]

The following excerpt is taken from a honeypot log. The log captures activities across three days.
There are several intrusion attempts; however, a few are successful.
(Note: The objective of this question is to test whether the student can read basic information from log entries and interpret the nature of attack.)
Apr 24 14:46:46 [4663]: spp_portscan: portscan detected from 194.222.156.169
Apr 24 14:46:46 [4663]: IDS27/FIN Scan: 194.222.156.169:56693 -> 172.16.1.107:482
Apr 24 18:01:05 [4663]: IDS/DNS-version-query: 212.244.97.121:3485 -> 172.16.1.107:53
Apr 24 19:04:01 [4663]: IDS213/ftp-passwd-retrieval: 194.222.156.169:1425 -> 172.16.1.107:21
Apr 25 08:02:41 [5875]: spp_portscan: PORTSCAN DETECTED from 24.9.255.53
Apr 25 02:08:07 [5875]: IDS277/DNS-version-query: 63.226.81.13:4499 -> 172.16.1.107:53
Apr 25 02:08:07 [5875]: IDS277/DNS-version-query: 63.226.81.13:4630 -> 172.16.1.101:53
Apr 25 02:38:17 [5875]: IDS/RPC-rpcinfo-query: 212.251.1.94:642 -> 172.16.1.107:111
Apr 25 19:37:32 [5875]: IDS230/web-cgi-space-wildcard: 198.173.35.164:4221 -> 172.16.1.107:80
Apr 26 05:45:12 [6283]: IDS212/dns-zone-transfer: 38.31.107.87:2291 -> 172.16.1.101:53
Apr 26 06:43:05 [6283]: IDS181/nops-x86: 63.226.81.13:1351 -> 172.16.1.107:53
Apr 26 06:44:25 victim7 PAM_pwdb[12509]: (login) session opened for user simple by (uid=0)
Apr 26 06:44:36 victim7 PAM_pwdb[12521]: (su) session opened for user simon by simple(uid=506)
Apr 26 06:45:34 [6283]: IDS175/socks-probe: 24.112.167.35:20 -> 172.16.1.107:1080
Apr 26 06:52:10 [6283]: IDS127/telnet-login-incorrect: 172.16.1.107:23 -> 213.28.22.189:4558
From the options given below choose the one which best interprets the following entry:
Apr 26 06:43:05 [6283]: IDS181/nops-x86: 63.226.81.13:1351 -> 172.16.1.107:53

  • A. An IDS evasion technique
  • B. A buffer overflow attempt
  • C. A DNS zone transfer
  • D. Data being retrieved from 63.226.81.13
Show Suggested Answer Hide Answer
Suggested Answer: A 🗳️
by deadguy1000 at Jan. 22, 2021, 12:08 p.m.

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deadguy1000
Highly Voted 3 years, 10 months ago
nops is Normally a sign of a buffer overflow attack or attempts
upvoted 5 times
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Bennoli13
Most Recent 5 months, 2 weeks ago
The key here is the IDS signature IDS181/nops-x86, which often refers to a type of attack involving NOP (No Operation) sleds used in buffer overflow exploits, particularly targeting x86 architecture. So, the answer is B
upvoted 2 times
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stickerbush1970
3 years, 9 months ago
The IDS log file is depicting numerous attacks, however, most of them are from different attackers, in reference to the attack in question, they are trying to mask their activity by trying to act legitimate, during his session on the honeypot, they changes users two times by using the “su” command, but never tries to attempt anything to severe.
upvoted 1 times
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JKCY
3 years, 9 months ago
Can be both... Cause look at the date and time of attack.. is quite well-spread
upvoted 1 times
...

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