Support #1532: File Extraction but truncate into several file.x and file.x.meta - Suricata - Open Information Security Foundation

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Support #1532

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File Extraction but truncate into several file.x and file.x.meta

Added by hao chen about 9 years ago. Updated almost 6 years ago.

Status:

Closed

Priority:

Normal

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Affected Versions:

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Description

when I use suricata2.1beta4 to file_extraction, I used my chrome to download a PDF document, the document is 981.1kb . But the result is the pdf document truncated into several file.x (1 to 20),and these total size of the files are 1.1mb, I could not understand why. I'm poor in English, but hope you can understand what I mean.

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files.rules (3.14 KB) files.rules	file rules	hao chen, 10/08/2015 01:28 AM
suricata.yaml (49 KB) suricata.yaml	config yaml	hao chen, 10/08/2015 01:28 AM
test2.pcap (7.73 MB) test2.pcap	pcap file	hao chen, 10/12/2015 07:24 PM
test3.pcap (1.05 MB) test3.pcap		hao chen, 10/15/2015 11:27 AM
eve.json (28.4 KB) eve.json		hao chen, 10/15/2015 11:30 AM
files-json.log (3.84 KB) files-json.log		hao chen, 10/15/2015 11:30 AM
file.1.meta (633 Bytes) file.1.meta		hao chen, 10/15/2015 11:31 AM
file.2.meta (633 Bytes) file.2.meta		hao chen, 10/15/2015 11:31 AM
file.1 (64 KB) file.1		hao chen, 10/15/2015 11:31 AM
file.2 (775 KB) file.2		hao chen, 10/15/2015 11:31 AM

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Updated by Victor Julien about 9 years ago

Priority changed from Immediate to Normal

Are you able to reproduce this behaviour with a pcap recording on the PDF transfer?

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Updated by hao chen about 9 years ago

File files.rules files.rules added
File suricata.yaml suricata.yaml added

I have lose some data by using Suricata 2.0.9 file extraction with a pcap recording on the PDF transfer, some of my wanted file ware truncated into several file.x and file.x.meta, these truncated files is not full.
suricata pcap url : http://pan.baidu.com/s/1i3AkDA9

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Updated by hao chen about 9 years ago

this is my eve.json file url:http://pan.baidu.com/s/1dDDGPOl

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Updated by Peter Manev about 9 years ago

Apologies for double posting - but i answered to the wrong ticket before.

That could explain why is it truncated.
Can you try to reproduce that with a much smaller pcap (than 1.5GB)?

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Updated by hao chen about 9 years ago

before that , can you tell me my files.rules and suricata.yaml is right?

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Updated by hao chen about 9 years ago

File test2.pcap test2.pcap added

In this pcap I use chrome download four pdf, these are they size:633.1kb, 71.0kb, 793.3kb, 4.6mb, and the pdf's url are http://www.xeltek.com/software/sp5000/sp5000manual.pdf, http://www.freescale.com/files/analog/doc/data_sheet/MC145018.pdf, http://cfm.citizen.co.jp/english/product/pdf/CMJ206T.pdf, http://www.infineon.com/dgdl/TDK5110_DS_V1.1.pdf?folderId=db3a30431689f4420116a096e1db033e&fileId=db3a3043191a246301192e318df72b6f

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Updated by Peter Manev about 9 years ago

Can you please try to narrow it down to one pcap/one pdf (with an md5 sum) case.

From what I am seeing there is none of the size of the pdfs that you are quoting in that pcap (I tried even looking with different file carving tools tools). There is some size but not the one that is supported to be - from what you mentioned before.

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Updated by hao chen about 9 years ago

File test3.pcap test3.pcap added
File eve.json eve.json added
File files-json.log files-json.log added
File file.1.meta file.1.meta added
File file.2.meta file.2.meta added
File file.1 file.1 added
File file.2 file.2 added

First, I'm sorry to make some troubles for you to explain my question and thank you very much for your patience. This time I produce a pcap with single pdf using the suricata.yaml and files.rules above. And the eve.json generated when I used suricata to read pcap. The result files is two.The pdf url is : http://www.freescale.com/files/analog/doc/data_sheet/MC145018.pdf, I used firefox to download it.

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