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Signature Detail

Security Intelligence Center
Signatures
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Short Name

SHELLCODE:WIN:SHIKATA-GANAI-CTS

Severity

Critical

Recommended

No

Recommended Action

Drop

Category

SHELLCODE

Keywords

Shikata Ga Nai Encoder Routine Over TCP-CTS

Release Date

2013/06/05

Update Number

2270

Supported Platforms

idp-4.0+, isg-3.0+, j-series-9.5+, mx-9.4+, srx-9.2+, srx-branch-9.4+, vsrx-12.1+

SHELLCODE: Shikata Ga Nai Encoder Routine Over TCP-CTS


This signature detects payloads being transferred over network that have been encoded using Shikata Ga Nai encoder routine. This may be an indication of someone trying to evade anti-virus/IPS solutions and possibly drop malicious code.

References

  • URL: http://www.rapid7.com/db/modules/encoder/x86/shikata_ga_nai
  • URL: http://www.admin-magazine.com/Articles/How-to-Hide-a-Malicious-File

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