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sagan-engine.c
1340 lines (977 loc) · 82.1 KB
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sagan-engine.c
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/*
** Copyright (C) 2009-2015 Quadrant Information Security <quadrantsec.com>
** Copyright (C) 2009-2015 Champ Clark III <cclark@quadrantsec.com>
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License Version 2 as
** published by the Free Software Foundation. You may not use, modify or
** distribute this program under any other version of the GNU General
** Public License.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* sagan-engine.c
*
* Threaded ngine that looks for events & patterns * based on
* 'snort like' rule sets.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h" /* From autoconf */
#endif
#include <stdio.h>
#include <string.h>
#include <time.h>
#include <pthread.h>
#include <stdbool.h>
#include <sys/stat.h>
#include "sagan.h"
#include "sagan-aetas.h"
#include "sagan-meta-content.h"
#include "sagan-send-alert.h"
#include "sagan-flowbit.h"
#include "sagan-rules.h"
#include "sagan-config.h"
#include "parsers/parsers.h"
#include "processors/sagan-engine.h"
#include "processors/sagan-bro-intel.h"
#include "processors/sagan-blacklist.h"
#ifdef WITH_BLUEDOT
#include "processors/sagan-bluedot.h"
#endif
#ifdef HAVE_LIBLOGNORM
#include "sagan-liblognorm.h"
struct _SaganNormalizeLiblognorm *SaganNormalizeLiblognorm;
pthread_mutex_t Lognorm_Mutex;
#endif
#ifdef HAVE_LIBMAXMINDDB
#include <sagan-geoip2.h>
#endif
struct _SaganCounters *counters;
struct _Rule_Struct *rulestruct;
struct _SaganDebug *debug;
struct _SaganConfig *config;
struct _Sagan_Flowbits *flowbits;
pthread_mutex_t AfterMutexSrc=PTHREAD_MUTEX_INITIALIZER;
pthread_mutex_t AfterMutexDst=PTHREAD_MUTEX_INITIALIZER;
pthread_mutex_t ThreshMutexSrc=PTHREAD_MUTEX_INITIALIZER;
pthread_mutex_t ThreshMutexDst=PTHREAD_MUTEX_INITIALIZER;
pthread_mutex_t CounterMutex=PTHREAD_MUTEX_INITIALIZER;
/* Global? Was local */
struct after_by_src *afterbysrc = NULL;
struct after_by_dst *afterbydst = NULL;
int after_count_by_src=0;
int after_count_by_dst=0;
struct thresh_by_src *threshbysrc = NULL;
struct thresh_by_dst *threshbydst = NULL;
int thresh_count_by_src=0;
int thresh_count_by_dst=0;
void Sagan_Engine_Init ( void )
{
#ifdef HAVE_LIBLOGNORM
SaganNormalizeLiblognorm = malloc(sizeof(struct _SaganNormalizeLiblognorm));
memset(SaganNormalizeLiblognorm, 0, sizeof(_SaganNormalizeLiblognorm));
#endif
}
int Sagan_Engine ( _SaganProcSyslog *SaganProcSyslog_LOCAL )
{
struct _Sagan_Processor_Info *processor_info_engine = NULL;
processor_info_engine = malloc(sizeof(struct _Sagan_Processor_Info));
memset(processor_info_engine, 0, sizeof(_Sagan_Processor_Info));
int processor_info_engine_src_port = 0;
int processor_info_engine_dst_port = 0;
int processor_info_engine_proto = 0;
int processor_info_engine_alertid = 0;
sbool after_log_flag=0;
sbool after_flag=0;
int threadid=0;
int i=0;
int b=0;
int z=0;
int match=0;
int sagan_match=0; /* Used to determine if all has "matched" (content, pcre, meta_content, etc) */
int rc=0;
int ovector[PCRE_OVECCOUNT];
int alter_num;
sbool geoip2_isset = 0;
sbool flowbit_return = 0;
sbool alert_time_trigger = 0;
char *ptmp;
char *tok2;
/* We don't tie these to HAVE_LIBMAXMINDDB because we might have other
* methods to extract the informaton */
char normalize_username[MAX_USERNAME_SIZE];
char normalize_filehash[MAX_HASH_SIZE];
char normalize_filename[MAX_FILENAME_SIZE];
char normalize_url[MAX_URL_SIZE];
int normalize_src_port;
int normalize_dst_port;
char ip_src[MAXIP];
sbool ip_src_flag = 0;
uint32_t ip_src_u32;
char ip_dst[MAXIP];
sbool ip_dst_flag = 0;
uint32_t ip_dst_u32;
char tmpbuf[128];
char s_msg[1024];
char alter_content[MAX_SYSLOGMSG];
time_t t;
struct tm *now;
char timet[20];
uint64_t thresh_oldtime_src;
uint64_t after_oldtime_src;
sbool thresh_flag=0;
sbool thresh_log_flag=0;
int proto = config->sagan_proto; /* Set proto to default */
sbool brointel_results = 0;
sbool blacklist_results = 0;
#ifdef HAVE_LIBMAXMINDDB
int geoip2_return = 0;
#endif
#ifdef WITH_BLUEDOT
int bluedot_results = 0;
sbool bluedot_ip_flag = 0;
sbool bluedot_hash_flag = 0;
sbool bluedot_url_flag = 0;
sbool bluedot_filename_flag = 0;
#endif
/* This needs to be included, even if liblognorm isn't in use */
sbool liblognorm_status = 0;
/* Search for matches */
/* First we search for 'program' and such. This way, we don't waste CPU
* time with pcre/content. */
for(b=0; b < counters->rulecount; b++)
{
match = 0;
if ( strcmp(rulestruct[b].s_program, "" ))
{
strlcpy(tmpbuf, rulestruct[b].s_program, sizeof(tmpbuf));
ptmp = strtok_r(tmpbuf, "|", &tok2);
match=1;
while ( ptmp != NULL )
{
if ( Sagan_Wildcard(ptmp, SaganProcSyslog_LOCAL->syslog_program) == 1 )
{
match = 0;
}
ptmp = strtok_r(NULL, "|", &tok2);
}
}
if ( strcmp(rulestruct[b].s_facility, "" ))
{
strlcpy(tmpbuf, rulestruct[b].s_facility, sizeof(tmpbuf));
ptmp = strtok_r(tmpbuf, "|", &tok2);
match=1;
while ( ptmp != NULL )
{
if (!strcmp(ptmp, SaganProcSyslog_LOCAL->syslog_facility))
{
match=0;
}
ptmp = strtok_r(NULL, "|", &tok2);
}
}
if ( strcmp(rulestruct[b].s_syspri, "" ))
{
strlcpy(tmpbuf, rulestruct[b].s_syspri, sizeof(tmpbuf));
ptmp = strtok_r(tmpbuf, "|", &tok2);
match=1;
while ( ptmp != NULL )
{
if (!strcmp(ptmp, SaganProcSyslog_LOCAL->syslog_priority))
{
match=0;
}
ptmp = strtok_r(NULL, "|", &tok2);
}
}
if ( strcmp(rulestruct[b].s_level, "" ))
{
strlcpy(tmpbuf, rulestruct[b].s_level, sizeof(tmpbuf));
ptmp = strtok_r(tmpbuf, "|", &tok2);
match=1;
while ( ptmp != NULL )
{
if (!strcmp(ptmp, SaganProcSyslog_LOCAL->syslog_level))
{
match=0;
}
ptmp = strtok_r(NULL, "|", &tok2);
}
}
if ( strcmp(rulestruct[b].s_tag, "" ))
{
strlcpy(tmpbuf, rulestruct[b].s_tag, sizeof(tmpbuf));
ptmp = strtok_r(tmpbuf, "|", &tok2);
match=1;
while ( ptmp != NULL )
{
if (!strcmp(ptmp, SaganProcSyslog_LOCAL->syslog_tag))
{
match=0;
}
ptmp = strtok_r(NULL, "|", &tok2);
}
}
/* If there has been a match above, or NULL on all, then we continue with
* PCRE/content search */
/* Search via strstr (content:) */
if ( match == 0 )
{
if ( rulestruct[b].content_count != 0 )
{
for(z=0; z<rulestruct[b].content_count; z++)
{
/* Content: OFFSET */
alter_num = 0;
if ( rulestruct[b].s_offset[z] != 0 )
{
if ( strlen(SaganProcSyslog_LOCAL->syslog_message) > rulestruct[b].s_offset[z] )
{
alter_num = strlen(SaganProcSyslog_LOCAL->syslog_message) - rulestruct[b].s_offset[z];
strlcpy(alter_content, SaganProcSyslog_LOCAL->syslog_message + (strlen(SaganProcSyslog_LOCAL->syslog_message) - alter_num), alter_num + 1);
}
else
{
alter_content[0] = '\0'; /* The offset is larger than the message. Set content too NULL */
}
}
else
{
strlcpy(alter_content, SaganProcSyslog_LOCAL->syslog_message, sizeof(alter_content));
}
/* Content: DEPTH */
if ( rulestruct[b].s_depth[z] != 0 )
{
/* We do +2 to account for alter_count[0] and whitespace at the begin of syslog message */
strlcpy(alter_content, alter_content, rulestruct[b].s_depth[z] + 2);
}
/* Content: DISTANCE */
if ( z > 0 && rulestruct[b].s_distance[z] != 0 && rulestruct[b].s_depth[z-1] != 0 )
{
alter_num = strlen(SaganProcSyslog_LOCAL->syslog_message) - ( rulestruct[b].s_depth[z-1] + rulestruct[b].s_distance[z] + 1);
strlcpy(alter_content, SaganProcSyslog_LOCAL->syslog_message + (strlen(SaganProcSyslog_LOCAL->syslog_message) - alter_num), alter_num + 1);
/* Content: WITHIN */
if ( rulestruct[b].s_within[z] != 0 )
{
strlcpy(alter_content, alter_content, rulestruct[b].s_within[z] + 1);
}
}
/* If case insensitive */
if ( rulestruct[b].s_nocase[z] == 1 )
{
if (rulestruct[b].content_not[z] != 1 && Sagan_stristr(alter_content, rulestruct[b].s_content[z], false))
{
sagan_match++;
}
else
{
/* for content: ! */
if ( rulestruct[b].content_not[z] == 1 && !Sagan_stristr(alter_content, rulestruct[b].s_content[z], false)) sagan_match++;
}
}
else
{
/* If case sensitive */
if ( rulestruct[b].content_not[z] != 1 && Sagan_strstr(alter_content, rulestruct[b].s_content[z] ))
{
sagan_match++;
}
else
{
/* for content: ! */
if ( rulestruct[b].content_not[z] == 1 && !Sagan_strstr(alter_content, rulestruct[b].s_content[z])) sagan_match++;
}
}
}
}
/* Search via PCRE */
/* Note: We verify each "step" has succeeded before function execution. For example,
* if there is a "content", but that has failed, there is no point in doing the
* pcre or meta_content. */
if ( rulestruct[b].pcre_count != 0 && sagan_match == rulestruct[b].content_count )
{
for(z=0; z<rulestruct[b].pcre_count; z++)
{
rc = pcre_exec( rulestruct[b].re_pcre[z], rulestruct[b].pcre_extra[z], SaganProcSyslog_LOCAL->syslog_message, (int)strlen(SaganProcSyslog_LOCAL->syslog_message), 0, 0, ovector, PCRE_OVECCOUNT);
if ( rc > 0 )
{
sagan_match++;
}
} /* End of pcre if */
}
/* Search via meta_content */
if ( rulestruct[b].meta_content_count != 0 && sagan_match == rulestruct[b].content_count + rulestruct[b].pcre_count )
{
for (z=0; z<rulestruct[b].meta_content_count; z++)
{
rc = Sagan_Meta_Content_Search(SaganProcSyslog_LOCAL->syslog_message, b);
if ( rc == 1 )
{
sagan_match++;
}
}
}
} /* End of content: & pcre */
/* if you got match */
if ( sagan_match == rulestruct[b].pcre_count + rulestruct[b].content_count + rulestruct[b].meta_content_count )
{
if ( match == 0 )
{
ip_src_flag = 0;
ip_dst_flag = 0;
normalize_dst_port=0;
normalize_src_port=0;
normalize_filehash[0] = '\0';
normalize_filename[0] = '\0';
normalize_url[0] = '\0';
normalize_username[0] = '\0';
#ifdef HAVE_LIBLOGNORM
if ( rulestruct[b].normalize == 1 && counters->liblognormtoload_count != 0 )
{
pthread_mutex_lock(&Lognorm_Mutex);
liblognorm_status = 0;
Sagan_Normalize_Liblognorm(SaganProcSyslog_LOCAL->syslog_message);
if (SaganNormalizeLiblognorm->ip_src[0] != '0')
{
strlcpy(ip_src, SaganNormalizeLiblognorm->ip_src, sizeof(ip_src));
ip_src_flag = 1;
liblognorm_status = 1;
}
if (SaganNormalizeLiblognorm->ip_dst[0] != '0' )
{
strlcpy(ip_dst, SaganNormalizeLiblognorm->ip_dst, sizeof(ip_dst));
ip_dst_flag = 1;
liblognorm_status = 1;
}
if ( SaganNormalizeLiblognorm->src_port != 0 )
{
normalize_src_port = SaganNormalizeLiblognorm->src_port;
liblognorm_status = 1;
}
if ( SaganNormalizeLiblognorm->dst_port != 0 )
{
normalize_dst_port = SaganNormalizeLiblognorm->dst_port;
liblognorm_status = 1;
}
if ( SaganNormalizeLiblognorm->username[0] != '\0' )
{
strlcpy(normalize_username, SaganNormalizeLiblognorm->username, sizeof(normalize_username));
liblognorm_status = 1;
}
if ( SaganNormalizeLiblognorm->url[0] != '\0' )
{
strlcpy(normalize_url, SaganNormalizeLiblognorm->url, sizeof(normalize_url));
liblognorm_status = 1;
}
if ( SaganNormalizeLiblognorm->filename[0] != '\0' )
{
strlcpy(normalize_filename, SaganNormalizeLiblognorm->filename, sizeof(normalize_filename));
liblognorm_status = 1;
}
/* We want MD5. Maybe SHA 256 in the future? */
/*
if ( SaganNormalizeLiblognorm->filehash_sha256[0] != '\0' )
{
filehash = SaganNormalizeLiblognorm->filehash_sha256;
liblognorm_status = 1;
}
else if ( SaganNormalizeLiblognorm->filehash_sha1[0] != '\0' )
{
filehash = SaganNormalizeLiblognorm->filehash_sha1;
liblognorm_status = 1;
}
*/
if ( SaganNormalizeLiblognorm->filehash_md5[0] != '\0' )
{
strlcpy(normalize_filehash, SaganNormalizeLiblognorm->filehash_md5, sizeof(normalize_filehash));
liblognorm_status = 1;
}
pthread_mutex_unlock(&Lognorm_Mutex);
}
#endif
/* Normalization should always over ride parse_src_ip/parse_dst_ip/parse_port,
* _unless_ liblognorm fails and both are in a rule */
if ( rulestruct[b].normalize == 0 || (rulestruct[b].normalize == 1 && liblognorm_status == 0 ) )
{
/* parse_src_ip: {position} */
if ( rulestruct[b].s_find_src_ip == 1 )
{
strlcpy(ip_src, Sagan_Parse_IP(SaganProcSyslog_LOCAL->syslog_message, rulestruct[b].s_find_src_pos), sizeof(ip_src));
ip_src_flag = 1;
}
/* parse_dst_ip: {postion} */
if ( rulestruct[b].s_find_dst_ip == 1 )
{
strlcpy(ip_dst, Sagan_Parse_IP(SaganProcSyslog_LOCAL->syslog_message, rulestruct[b].s_find_dst_pos), sizeof(ip_dst));
ip_dst_flag = 1;
}
/* parse_port */
if ( rulestruct[b].s_find_port == 1 )
{
normalize_src_port = Sagan_Parse_Port(SaganProcSyslog_LOCAL->syslog_message);
}
else
{
normalize_src_port = config->sagan_port;
}
}
/* If the rule calls for proto searching, we do it now */
proto = 0;
if ( rulestruct[b].s_find_proto_program == 1 )
{
proto = Sagan_Parse_Proto_Program(SaganProcSyslog_LOCAL->syslog_program);
}
if ( rulestruct[b].s_find_proto == 1 && proto == 0 )
{
proto = Sagan_Parse_Proto(SaganProcSyslog_LOCAL->syslog_message);
}
/* If proto is not searched or has failed, default to whatever the rule told us to
use */
if ( proto == 0 )
{
proto = rulestruct[b].ip_proto;
}
if ( ip_src_flag == 0 || ip_src[0] == '0' )
{
strlcpy(ip_src, SaganProcSyslog_LOCAL->syslog_host, sizeof(ip_src));
}
if ( ip_dst_flag == 0 || ip_dst[0] == '0' )
{
strlcpy(ip_dst, SaganProcSyslog_LOCAL->syslog_host, sizeof(ip_dst));
}
if ( normalize_src_port == 0 )
{
normalize_src_port=config->sagan_port;
}
if ( normalize_dst_port == 0 )
{
normalize_dst_port=rulestruct[b].dst_port;
}
if ( proto == 0 )
{
proto = config->sagan_proto; /* Rule didn't specify proto, use sagan default! */
}
/* If the "source" is 127.0.0.1 that is not useful. Replace with config->sagan_host
* (defined by user in sagan.conf */
if ( !strcmp(ip_src, "127.0.0.1") || !strcmp(ip_dst, "::1") )
{
strlcpy(ip_src, config->sagan_host, sizeof(ip_src));
}
if ( !strcmp(ip_dst, "127.0.0.1") || !strcmp(ip_dst, "::1" ) )
{
strlcpy(ip_dst, config->sagan_host, sizeof(ip_dst));
}
ip_src_u32 = IP2Bit(ip_src);
ip_dst_u32 = IP2Bit(ip_dst);
strlcpy(s_msg, rulestruct[b].s_msg, sizeof(s_msg));
/****************************************************************************
* Flowbit
****************************************************************************/
if ( rulestruct[b].flowbit_flag && rulestruct[b].flowbit_condition_count )
{
flowbit_return = Sagan_Flowbit_Condition(b, ip_src, ip_dst);
}
/****************************************************************************
* Country code
****************************************************************************/
#ifdef HAVE_LIBMAXMINDDB
if ( rulestruct[b].geoip2_flag )
{
if ( rulestruct[b].geoip2_src_or_dst == 1 )
{
geoip2_return = Sagan_GeoIP2_Lookup_Country(ip_src, b);
}
else
{
geoip2_return = Sagan_GeoIP2_Lookup_Country(ip_dst, b);
}
if ( geoip2_return != 2 )
{
/* If country IS NOT {my value} return 1 */
if ( rulestruct[b].geoip2_type == 1 ) /* isnot */
{
if ( geoip2_return == 1 )
{
geoip2_isset = 0;
}
else
{
geoip2_isset = 1;
counters->geoip2_hit++;
}
}
/* If country IS {my value} return 1 */
if ( rulestruct[b].geoip2_type == 2 ) /* is */
{
if ( geoip2_return == 1 )
{
geoip2_isset = 1;
counters->geoip2_hit++;
}
else
{
geoip2_isset = 0;
}
}
}
}
#endif
/****************************************************************************
* Time based alerting
****************************************************************************/
if ( rulestruct[b].alert_time_flag )
{
alert_time_trigger = 0;
if ( Sagan_Check_Time(b) )
{
alert_time_trigger = 1;
}
}
/****************************************************************************
* Blacklist
****************************************************************************/
if ( rulestruct[b].blacklist_flag )
{
blacklist_results = 0;
if ( rulestruct[b].blacklist_ipaddr_src )
{
blacklist_results = Sagan_Blacklist_IPADDR( ip_src_u32 );
}
if ( blacklist_results == 0 && rulestruct[b].blacklist_ipaddr_dst )
{
blacklist_results = Sagan_Blacklist_IPADDR( ip_dst_u32 );
}
if ( blacklist_results == 0 && rulestruct[b].blacklist_ipaddr_all )
{
blacklist_results = Sagan_Blacklist_IPADDR_All(SaganProcSyslog_LOCAL->syslog_message);
}
if ( blacklist_results == 0 && rulestruct[b].blacklist_ipaddr_both )
{
if ( Sagan_Blacklist_IPADDR( ip_src_u32 ) || Sagan_Blacklist_IPADDR( ip_dst_u32 ) )
{
blacklist_results = 1;
}
}
}
#ifdef WITH_BLUEDOT
if ( config->bluedot_flag )
{
if ( rulestruct[b].bluedot_ipaddr_type )
{
bluedot_results = 0;
/* 1 == src, 2 == dst, 3 == both, 4 == all */
if ( rulestruct[b].bluedot_ipaddr_type == 1 )
{
bluedot_results = Sagan_Bluedot_Lookup(ip_src, BLUEDOT_LOOKUP_IP);
bluedot_ip_flag = Sagan_Bluedot_Cat_Compare( bluedot_results, b, BLUEDOT_LOOKUP_IP);
}
if ( rulestruct[b].bluedot_ipaddr_type == 2 )
{
bluedot_results = Sagan_Bluedot_Lookup(ip_dst, BLUEDOT_LOOKUP_IP);
bluedot_ip_flag = Sagan_Bluedot_Cat_Compare( bluedot_results, b, BLUEDOT_LOOKUP_IP);
}
if ( rulestruct[b].bluedot_ipaddr_type == 3 )
{
bluedot_results = Sagan_Bluedot_Lookup(ip_src, BLUEDOT_LOOKUP_IP);
bluedot_ip_flag = Sagan_Bluedot_Cat_Compare( bluedot_results, b, BLUEDOT_LOOKUP_IP);
/* If the source isn't found, then check the dst */
if ( bluedot_ip_flag != 0 )
{
bluedot_results = Sagan_Bluedot_Lookup(ip_dst, BLUEDOT_LOOKUP_IP);
bluedot_ip_flag = Sagan_Bluedot_Cat_Compare( bluedot_results, b, BLUEDOT_LOOKUP_IP);
}
}
if ( rulestruct[b].bluedot_ipaddr_type == 4 )
{
bluedot_ip_flag = Sagan_Bluedot_IP_Lookup_All(SaganProcSyslog_LOCAL->syslog_message, b);
}
}
if ( rulestruct[b].bluedot_file_hash && normalize_filehash[0] != '\0' )
{
bluedot_results = Sagan_Bluedot_Lookup( normalize_filehash, BLUEDOT_LOOKUP_HASH);
bluedot_hash_flag = Sagan_Bluedot_Cat_Compare( bluedot_results, b, BLUEDOT_LOOKUP_HASH);
}
if ( rulestruct[b].bluedot_url && normalize_url != '\0' )
{
bluedot_results = Sagan_Bluedot_Lookup( normalize_url, BLUEDOT_LOOKUP_URL);
bluedot_url_flag = Sagan_Bluedot_Cat_Compare( bluedot_results, b, BLUEDOT_LOOKUP_URL);
}
if ( rulestruct[b].bluedot_filename && normalize_filename[0] != '\0' )
{
bluedot_results = Sagan_Bluedot_Lookup( normalize_filename, BLUEDOT_LOOKUP_FILENAME);
bluedot_filename_flag = Sagan_Bluedot_Cat_Compare( bluedot_results, b, BLUEDOT_LOOKUP_FILENAME);
}
/* Do cleanup at the end in case any "hits" above refresh the cache. This why we don't
* "delete" an entry only to re-add it! */
Sagan_Bluedot_Check_Cache_Time();
}
#endif
/****************************************************************************
* Bro Intel
****************************************************************************/
if ( rulestruct[b].brointel_flag )
{
brointel_results = 0;
if ( rulestruct[b].brointel_ipaddr_src )
{
brointel_results = Sagan_BroIntel_IPADDR( ip_src_u32 );
}
if ( brointel_results == 0 && rulestruct[b].brointel_ipaddr_dst )
{
brointel_results = Sagan_BroIntel_IPADDR( ip_dst_u32 );
}
if ( brointel_results == 0 && rulestruct[b].brointel_ipaddr_all )
{
brointel_results = Sagan_BroIntel_IPADDR_All ( SaganProcSyslog_LOCAL->syslog_message );
}
if ( brointel_results == 0 && rulestruct[b].brointel_ipaddr_both )
{
if ( Sagan_BroIntel_IPADDR( ip_src_u32 ) || Sagan_BroIntel_IPADDR( ip_dst_u32 ) )
{
brointel_results = 1;
}
}
if ( brointel_results == 0 && rulestruct[b].brointel_domain )
{
brointel_results = Sagan_BroIntel_DOMAIN(SaganProcSyslog_LOCAL->syslog_message);
}
if ( brointel_results == 0 && rulestruct[b].brointel_file_hash )
{
brointel_results = Sagan_BroIntel_FILE_HASH(SaganProcSyslog_LOCAL->syslog_message);
}
if ( brointel_results == 0 && rulestruct[b].brointel_url )
{
brointel_results = Sagan_BroIntel_URL(SaganProcSyslog_LOCAL->syslog_message);
}
if ( brointel_results == 0 && rulestruct[b].brointel_software )
{
brointel_results = Sagan_BroIntel_SOFTWARE(SaganProcSyslog_LOCAL->syslog_message);
}
if ( brointel_results == 0 && rulestruct[b].brointel_user_name )
{
brointel_results = Sagan_BroIntel_USER_NAME(SaganProcSyslog_LOCAL->syslog_message);
}
if ( brointel_results == 0 && rulestruct[b].brointel_file_name )
{
brointel_results = Sagan_BroIntel_FILE_NAME(SaganProcSyslog_LOCAL->syslog_message);
}
if ( brointel_results == 0 && rulestruct[b].brointel_cert_hash )
{
brointel_results = Sagan_BroIntel_CERT_HASH(SaganProcSyslog_LOCAL->syslog_message);
}
}
/****************************************************************************/
/* Populate the SaganEvent array with the information needed. This info */
/* will be passed to the threads. No need to populate it _if_ we're in a */
/* threshold state. */
/****************************************************************************/
if ( rulestruct[b].flowbit_flag == 0 ||
( rulestruct[b].flowbit_flag && rulestruct[b].flowbit_set_count && rulestruct[b].flowbit_condition_count == 0 ) ||
( rulestruct[b].flowbit_flag && rulestruct[b].flowbit_set_count && rulestruct[b].flowbit_condition_count && flowbit_return ) ||
( rulestruct[b].flowbit_flag && rulestruct[b].flowbit_set_count == 0 && rulestruct[b].flowbit_condition_count && flowbit_return ))
{
if ( rulestruct[b].alert_time_flag == 0 || alert_time_trigger == 1 )
{
#ifdef HAVE_LIBMAXMINDDB
if ( rulestruct[b].geoip2_flag == 0 || geoip2_isset == 1 )
{
#endif
if ( rulestruct[b].blacklist_flag == 0 || blacklist_results == 1 )
{
if ( rulestruct[b].brointel_flag == 0 || brointel_results == 1)
{
#ifdef WITH_BLUEDOT
if ( config->bluedot_flag == 0 || rulestruct[b].bluedot_file_hash == 0 || ( rulestruct[b].bluedot_file_hash == 1 && bluedot_hash_flag == 1 ))
{
if ( config->bluedot_flag == 0 || rulestruct[b].bluedot_filename == 0 || ( rulestruct[b].bluedot_filename == 1 && bluedot_filename_flag == 1 ))
{
if ( config->bluedot_flag == 0 || rulestruct[b].bluedot_url == 0 || ( rulestruct[b].bluedot_url == 1 && bluedot_url_flag == 1 ))
{
if ( config->bluedot_flag == 0 || rulestruct[b].bluedot_ipaddr_type == 0 || ( rulestruct[b].bluedot_ipaddr_type != 0 && bluedot_ip_flag == 1 ))
{
#endif
after_log_flag=0;
/*********************************************************/
/* After - Similar to thresholding, but the opposite */
/* direction - ie - alert _after_ X number of events */
/*********************************************************/
if ( rulestruct[b].after_src_or_dst != 0 )
{
after_log_flag=1;
t = time(NULL);
now=localtime(&t);
strftime(timet, sizeof(timet), "%s", now);
/* After by source IP address */
if ( rulestruct[b].after_src_or_dst == 1 )
{
after_flag = 0;
for (i = 0; i < after_count_by_src; i++ )
{
if ( afterbysrc[i].ipsrc == ip_src_u32 && !strcmp(afterbysrc[i].sid, rulestruct[b].s_sid ))
{
after_flag=1;
pthread_mutex_lock(&AfterMutexSrc);
afterbysrc[i].count++;
after_oldtime_src = atol(timet) - afterbysrc[i].utime;
afterbysrc[i].utime = atol(timet);
if ( after_oldtime_src > rulestruct[b].after_seconds )
{
afterbysrc[i].count=1;
afterbysrc[i].utime = atol(timet);
after_log_flag=1;
}
pthread_mutex_unlock(&AfterMutexSrc);
if ( rulestruct[b].after_count < afterbysrc[i].count )
{
after_log_flag = 0;