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 Forum index » Archive » Archive: MetaCortechs » MetaCortechs: Puzzles
[PUZZLE] The UNJUST files
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aqualung1105
Boot


Joined: 16 Oct 2003
Posts: 55

BTW - The spike mentioned by Beth in her mail to Phil was, as I said, at least one week earlier, so we have at least two...

PostPosted: Fri Oct 17, 2003 9:52 am
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Marl64
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Posts: 456
Location: Prisoner of Zion

aqualung1105 wrote:
- Stella logger, minor spike - 0.84 (whatever that means)


It seems to indicate a processor load of almost 1%

I don't know what processors they use, but if the highest it gets to is 9%, then they're definitely not using Windows Very Happy
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PostPosted: Fri Oct 17, 2003 9:53 am
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aqualung1105
Boot


Joined: 16 Oct 2003
Posts: 55

Marl -

You mention in the ID-thread the childish method of coding info in gibberish -
Have you looked at this:

We sadly build the sad fool
Because the beasts come behind the bottom balls.
Who do the cows come so sadly and cleverly?
What are the balls?
A table drags secretly above the high flowers.
The table writes.

- from the unjust files, obviously...
I´m going out IRL now, been here a long time.
I´ll be back! - said the governator - sorry, Terminator...

PostPosted: Fri Oct 17, 2003 10:45 am
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AnthraX101
Entrenched

Joined: 18 Mar 2003
Posts: 797

One thing I noticed was that they couldn't even get onto the boxes while they were getting hit by this. If their processor is only at 10% though, it must be some form of connection saturation to cause connectivity problems (assuming processor use isn't throttled). This looks more like a DoS then a security scan. I am still thinking that Laberinth is some sort of counter-attack system.

AnthraX101

PostPosted: Fri Oct 17, 2003 10:51 am
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Marl64
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aqualung1105 wrote:
Who do the cows come so sadly and cleverly?


The thing that strikes me about this is the use of the word "Who". Sure most of this guys posts are out there (the .ypt guy, not aqualung), but this one is so far out of place I can't focus on anything else.

AAAaaarg Confused

(I added some ideas to the characters thread you mentioned Here but didn't want to repeat it here)
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PostPosted: Fri Oct 17, 2003 11:01 am
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Marl64
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AnthraX101 wrote:
One thing I noticed was that they couldn't even get onto the boxes while they were getting hit by this. If their processor is only at 10% though, it must be some form of connection saturation to cause connectivity problems (assuming processor use isn't throttled). This looks more like a DoS then a security scan. I am still thinking that Laberinth is some sort of counter-attack system.

AnthraX101


That seems to fit. But I can't help wondering why their interest is in the CPU rather than the network traffic.
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PostPosted: Fri Oct 17, 2003 11:07 am
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AnthraX101
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Joined: 18 Mar 2003
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Well, strictly speaking CPU usage is another angle of DoS. Along with memory usage, and network resources, you can create a DoS without actualy filling up the network pipe, simply make more connections then the server can handle.

However, once they see that their CPUs are spiking at 10%, one would think they would look at whatever the bottle neck is.

AnthraX101

PostPosted: Fri Oct 17, 2003 11:14 am
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xnbomb
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Joined: 13 Oct 2003
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Logger numbers

How do we know those figures are percentages? If above 9 is really high, maybe the highest is 10?

I know we usually express load on a CPU as a %, but we don't really know what those logger numbers mean, beyond some kind of 'network activity', as inferred from the silvia and unjust correspondances.

PostPosted: Fri Oct 17, 2003 11:16 am
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yeahyeah
Decorated


Joined: 14 Oct 2003
Posts: 282

load average isnt percent..

Quote:

The Unix "load average" is the number of jobs waiting for the CPU. It can
be fractional cause it's averaged into a second (number of jobs waiting at
each CPU tick divided by number of ticks per second).

If your load average is 1.0 and your CPU has no idle time, then you've got
a "fully loaded" CPU. If your load average is 1.0 and your CPU has idle
time, then you've got resource contention and are wasting CPU cycles. If
your CPU is "fully loaded" then you are at a CPU bottleneck.



Sorry that I couldnt find a better quote, but a lot of people think load average is a % usage, but its not.. (commonly people will think a load average of 2 means 200% cpu utilization - which it doesnt)[/quote]

PostPosted: Fri Oct 17, 2003 11:19 am
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xnbomb
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A little on load average

Oh, okay ... here's a decent quote I found at:


http://freebooks.by.ru/view/LinuxNetworkSolution/31620143.htm

Quote:
However, occasionally applications start using the CPU excessively, sometimes by design (for example, a compression or encryption utility can be using computationally intensive algorithms), and other times due to a bug. When the CPU is under heavy load, other applications become noticeably slower. If several applications compete for the CPU, the system can slow to a crawl.

To find out whether your system is under such load, you can use the uptime command:

$ uptime
5:12pm up 62 days, 2:46, 1 user, load average: 0.08, 0.03, 0.00

The numbers to check are the load average numbers at the end of the single line of output produced by this command. The three numbers here are values representing the processor's load average during the last minute, last five minutes, and last 15 minutes.

Basically, the load average tells you how many running jobs are competing for the system's processor. If a process runs full time but all other processes are paused (perhaps waiting for user input), you'll have a load average of 1. When two processes compete for the processor, the load average is 2. If only one process is active, but it waits for hardware 50 percent of the time, you'll have a load average of 0.5. In essence, the load average tells you how many processors you need to let all running processes work full time, without having to wait for other processes to finish their jobs with the processor.

Normally, your system's load average is a fractional number. Quite often, it's 0.00 on a quiescent system. If the load average is above 0.50 on a lightly loaded system, I always investigate. A high load average does not necessarily indicate an abnormal condition, but it's a good idea to know what processes cause such a load on your system. It could be that your Web server suddenly became more popular; it could be that a user who uses your system to develop applications managed to write a program that entered an infinite loop, consuming processing power as fast as it's allowed to. Or, it could be that you have a problem (a runaway process, for instance).


I just learned something Very Happy Is it reasonable to think all that logger data is in the same format (1 minute, 5 minutes, 15 minutes)?

PostPosted: Fri Oct 17, 2003 11:34 am
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Marl64
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yeahyeah wrote:
load average isnt percent..


Thanks for that, it makes a lot more sense now.
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PostPosted: Fri Oct 17, 2003 11:36 am
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Scorpio
Kilroy

Joined: 17 Oct 2003
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Re: A little on load average

xnbomb wrote:
Oh, okay ... here's a decent quote I found at:


http://freebooks.by.ru/view/LinuxNetworkSolution/31620143.htm

Quote:
However, occasionally applications start using the CPU excessively, sometimes by design (for example, a compression or encryption utility can be using computationally intensive algorithms), and other times due to a bug. When the CPU is under heavy load, other applications become noticeably slower. If several applications compete for the CPU, the system can slow to a crawl.

To find out whether your system is under such load, you can use the uptime command:

$ uptime
5:12pm up 62 days, 2:46, 1 user, load average: 0.08, 0.03, 0.00

The numbers to check are the load average numbers at the end of the single line of output produced by this command. The three numbers here are values representing the processor's load average during the last minute, last five minutes, and last 15 minutes.

Basically, the load average tells you how many running jobs are competing for the system's processor. If a process runs full time but all other processes are paused (perhaps waiting for user input), you'll have a load average of 1. When two processes compete for the processor, the load average is 2. If only one process is active, but it waits for hardware 50 percent of the time, you'll have a load average of 0.5. In essence, the load average tells you how many processors you need to let all running processes work full time, without having to wait for other processes to finish their jobs with the processor.

Normally, your system's load average is a fractional number. Quite often, it's 0.00 on a quiescent system. If the load average is above 0.50 on a lightly loaded system, I always investigate. A high load average does not necessarily indicate an abnormal condition, but it's a good idea to know what processes cause such a load on your system. It could be that your Web server suddenly became more popular; it could be that a user who uses your system to develop applications managed to write a program that entered an infinite loop, consuming processing power as fast as it's allowed to. Or, it could be that you have a problem (a runaway process, for instance).


I just learned something Very Happy Is it reasonable to think all that logger data is in the same format (1 minute, 5 minutes, 15 minutes)?



I like the idea of the load average, though I don't think that they are in the format 1 minute, 5 minutes, 15 minutes.

There is high activity for 5 minutes, but the following minute load average doesn't point this out

13:58:59 redpepper logger: processor load average: 0.03, 0.07, 0.05
13:59:59 redpepper logger: processor load average: 7.76, 8.12, 7.86
14:00:59 redpepper logger: processor load average: 7.68, 7.35, 8.26
14:01:59 redpepper logger: processor load average: 8.16, 7.81, 7.63
14:02:59 redpepper logger: processor load average: 8.26, 8.46, 8.37
14:03:59 redpepper logger: processor load average: 7.86, 7.45, 7.32
14:04:59 redpepper logger: processor load average: 0.08, 0.05, 0.04

the 0.05 @ 14:04:59 should be some kind of average of the previuos five minutes

Scorpio

PostPosted: Fri Oct 17, 2003 12:01 pm
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Marl64
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Re: A little on load average

Scorpio wrote:

13:58:59 redpepper logger: processor load average: 0.03, 0.07, 0.05
13:59:59 redpepper logger: processor load average: 7.76, 8.12, 7.86
14:00:59 redpepper logger: processor load average: 7.68, 7.35, 8.26
14:01:59 redpepper logger: processor load average: 8.16, 7.81, 7.63
14:02:59 redpepper logger: processor load average: 8.26, 8.46, 8.37
14:03:59 redpepper logger: processor load average: 7.86, 7.45, 7.32
14:04:59 redpepper logger: processor load average: 0.08, 0.05, 0.04

the 0.05 @ 14:04:59 should be some kind of average of the previuos five minutes

Scorpio


Yeah the times on ther left do seem to negate the 5 minutes and 15 minutes thing, perhaps on this system it's seconds not minutes.
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PostPosted: Fri Oct 17, 2003 12:06 pm
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Marl64
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Forgetting about what's in the logs now, but looking more at what the logs say, I see two possibilities.

1) The spike occurred at roughly the same time on each system and the times are there to indicate the location of the system (based on timezones).

2) The Spike is moving from system to system, in which case we need to know the location of the systems to corrolate a pattern.

Sadly you can't combine the two.

I would like to include in the first, that this would lead to the location of the hackers, but given the nature of hackers, I couldn't possibly justify it.
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PostPosted: Fri Oct 17, 2003 12:12 pm
Last edited by Marl64 on Fri Oct 17, 2003 12:14 pm; edited 1 time in total
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yeahyeah
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Joined: 14 Oct 2003
Posts: 282

yes, there data almost certainly in that format (I've never seen a tool that logs the load average via syslog before though ;)), but remember, the last two columns are averages over a longer duration, so they'll 'spike' at the same time, but decay differently (depending on if it was 'one burst' or more..)

Those loads really arent that crazy though, I've seen isps that run at load averages of 20 or 25, but thats with a lot of shell users, etc.

And if you don't have your web server configured properly and it gets /.'d then you can see your averages go through the roof. Systems I use typically have averages of 0.00 - 0.02, but they do jump when heavy database stuff is going on.. =)

To me, the hackers talking about the averages was more of an attempt to show the gravity of the situation, and to possibly point out the epicenter of the disturbance (or the fact that it wasn't isolated to one region), I don't think any analysis of the 'exact' load values will be very useful, but could help show where it was most concentrated sorta.
But since different machines may have different amounts of memory, processor(s), and not to mention number of running processes, its not going to be exact..

PostPosted: Fri Oct 17, 2003 12:12 pm
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