17 lines
704 B
Text
17 lines
704 B
Text
|
rule HKTL_Reverse_Connect_TCP_PTY_Shell {
|
||
|
|
meta:
|
||
|
|
description = "Detects reverse connect TCP PTY shell"
|
||
|
|
author = "Jeff Beley"
|
||
|
|
date = "2019-10-19"
|
||
|
|
hash1 = "cae9833292d3013774bdc689d4471fd38e4a80d2d407adf9fa99bc8cde3319bf"
|
||
|
|
reference = "https://github.com/infodox/python-pty-shells/blob/master/tcp_pty_backconnect.py"
|
||
|
|
id = "a9a90d67-774b-5b32-97c0-d7e06763f2e9"
|
||
|
|
strings:
|
||
|
|
$s1 = "os.dup2(s.fileno(),1)" fullword ascii
|
||
|
|
$s2 = "pty.spawn(\"/bin/\")" fullword ascii
|
||
|
|
$s3 = "os.putenv(\"HISTFILE\",'/dev/null')" fullword ascii
|
||
|
|
$s4 = "socket.socket(socket.AF_INET, socket.SOCK_STREAM)" fullword ascii
|
||
|
|
condition:
|
||
|
|
filesize < 1KB and 2 of them
|
||
|
|
}
|