[Snort-sigs] Multiple signatures 004

Y M snort at outlook.com
Thu Jul 19 14:22:33 EDT 2018


Hi,

Pcaps for some the signatures below are available.

# --------------------
# Date: 2018-07-08
# Title: Osx.Trojan.Agent (Win.Trojan.Agent-6593123-0)
# Tests: syntax only
# Reference:
#    - https://www.virustotal.com/#/file/86a588672837afdc1900ad9e78c7d0ae7a842bdd972dbdc5bdff2574a37f5acc/detection
#    - https://www.malwares.com/report/file?hash=86A588672837AFDC1900AD9E78C7D0AE7A842BDD972DBDC5BDFF2574A37F5ACC
# Confidence: low
# Notes: Domains are extracted from strings.

alert udp $HOME_NET any -> $EXTERNAL_NET 53 (msg:"MALWARE-OTHER DNS request for known malware domain apple-iclods.org - Osx.Trojan.Agent"; flow:to_server; byte_test:1,!&,0xF8,2; content:"|0C|apple-iclods|03|org|00|"; fast_pattern:only; metadata:ruleset community, service dns; reference:url,www.virustotal.com/#/file/86a588672837afdc1900ad9e78c7d0ae7a842bdd972dbdc5bdff2574a37f5acc/detection; reference:url,www.malwares.com/report/file?hash=86A588672837AFDC1900AD9E78C7D0AE7A842BDD972DBDC5BDFF2574A37F5ACC; classtype:trojan-activity; sid:8000181; rev:1;)

alert udp $HOME_NET any -> $EXTERNAL_NET 53 (msg:"MALWARE-OTHER DNS request for known malware domain apple-checker.org - Osx.Trojan.Agent"; flow:to_server; byte_test:1,!&,0xF8,2; content:"|0D|apple-checker|03|org|00|"; fast_pattern:only; metadata:ruleset community, service dns; reference:url,www.virustotal.com/#/file/86a588672837afdc1900ad9e78c7d0ae7a842bdd972dbdc5bdff2574a37f5acc/detection; reference:url,www.malwares.com/report/file?hash=86A588672837AFDC1900AD9E78C7D0AE7A842BDD972DBDC5BDFF2574A37F5ACC; classtype:trojan-activity; sid:8000182; rev:1;)

alert udp $HOME_NET any -> $EXTERNAL_NET 53 (msg:"MALWARE-OTHER DNS request for known malware domain apple-uptoday.org - Osx.Trojan.Agent"; flow:to_server; byte_test:1,!&,0xF8,2; content:"|0D|apple-uptoday|03|org|00|"; fast_pattern:only; metadata:ruleset community, service dns; reference:url,www.virustotal.com/#/file/86a588672837afdc1900ad9e78c7d0ae7a842bdd972dbdc5bdff2574a37f5acc/detection; reference:url,www.malwares.com/report/file?hash=86A588672837AFDC1900AD9E78C7D0AE7A842BDD972DBDC5BDFF2574A37F5ACC; classtype:trojan-activity; sid:8000183; rev:1;)

alert udp $HOME_NET any -> $EXTERNAL_NET 53 (msg:"MALWARE-OTHER DNS request for known malware domain apple-search.info - Osx.Trojan.Agent"; flow:to_server; byte_test:1,!&,0xF8,2; content:"|0C|apple-search|04|info|00|"; fast_pattern:only; metadata:ruleset community, service dns; reference:url,www.virustotal.com/#/file/86a588672837afdc1900ad9e78c7d0ae7a842bdd972dbdc5bdff2574a37f5acc/detection; reference:url,www.malwares.com/report/file?hash=86A588672837AFDC1900AD9E78C7D0AE7A842BDD972DBDC5BDFF2574A37F5ACC; classtype:trojan-activity; sid:8000184; rev:1;)

# --------------------
# Date: 2018-07-08
# Title: Worm.Win32.VBNA, Trojan:Win32/Fuery, WebMonitor RAT
# Tests: syntax only
# Reference:
#    - APR. Report: https://researchcenter.paloaltonetworks.com/2018/04/unit42-say-cheese-webmonitor-rat-comes-c2-service-c2aas/
#    - JUN. Report: https://twitter.com/sysopfb/status/1014176408996741120
# Confidence: low
# Notes: The signature was created back on April, but was held due to lack of information.
#        Samples from April and June appear to have the same C&C patterns.

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"MALWARE-CNC Win.Worm.VBNA variant outbound connection"; flow:to_server,established; urilen:10; content:"/recv3.php"; fast_pattern:only; http_uri; content:"User-Agent|3A 20|Mozilla/4.0 (compatible|3B| Win32|3B| WinHttp.WinHttpRequest.5)"; http_header; content:"POST"; http_method; metadata:ruleset community, service http; reference:url,www.virustotal.com/#/file/26c2ffd2de0636707a26f6e99318cdfbbe26d558cd82a1e2e2812f43fff53da3/behavior; classtype:trojan-activity; sid:8000185; rev:2;)

# --------------------
# Date: 2018-07-18
# Title: Win.Trojan.Presenoker
# Tests: pcap (partial)
# Reference:
#    - https://twitter.com/CDA/status/1014144988454772736
#    - https://www.virustotal.com/#/file/845a0e5720a6288794a6452adb8d3e7c22f5e6e6b9d4f7481fbd30e3efba4f28/detection
#    - https://otx.alienvault.com/pulse/5b3e11189a311930b6ad4928
# Confidence: low

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"MALWARE-CNC Win.Trojan.Presenoker outbound connection"; flow:to_server,established; content:"/?computer-name="; fast_pattern:only; http_uri; content:"&username="; http_uri; metadata:ruleset community, service http; reference:url,www.virustotal.com/#/file/845a0e5720a6288794a6452adb8d3e7c22f5e6e6b9d4f7481fbd30e3efba4f28/detection; classtype:trojan-activity; sid:8000186; rev:1;)

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"MALWARE-CNC Win.Trojan.Presenoker outbound connection"; flow:to_server,established; content:"/index.php?username="; http_uri; content:"&OSname="; fast_pattern:only; http_uri; metadata:ruleset community, service http; reference:url,www.virustotal.com/#/file/845a0e5720a6288794a6452adb8d3e7c22f5e6e6b9d4f7481fbd30e3efba4f28/detection; classtype:trojan-activity; sid:8000187; rev:1;)

# --------------------
# Date: 2018-07-18
# Title: Win.Trojan.FalChil
# Tests: pcap
# Reference:
#    - https://twitter.com/darienhuss/status/1014937916815048704
#    - https://www.virustotal.com/#/file/d060123c21869b765b22b712a8ca47266a33464095411e2b7bdf7e327d23ed07/detection
# Confidence: low

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"MALWARE-CNC Win.Trojan.FalChil outbound connection"; flow:to_server,established; content:"/board.asp"; fast_pattern:only; http_uri; content:"msgid="; http_client_body; content:"&id="; http_client_body; metadata:ruleset community, service http; reference:url,www.virustotal.com/#/file/d060123c21869b765b22b712a8ca47266a33464095411e2b7bdf7e327d23ed07/detection; classtype:trojan-activity; sid:8000188; rev:1;)

# --------------------
# Date: 2018-07-19
# Title: JS.Agent.Dropper
# Tests: pcap
# Reference:
#    - https://www.fireeye.com/blog/threat-research/2018/07/chinese-espionage-group-targets-cambodia-ahead-of-elections.html
#    - https://www.virustotal.com/#/file/075e66b5c3c5c2ce6f9d3aea86a72fed09f0eb91c03ec7dbbdb17d9d851807c8/detection
#    - https://www.virustotal.com/#/file/c5985720c542567b906b2329036d872d0d4ab380d1ea19a38c5ec6551be380ff/detection
# Confidence: low

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"MALWARE-CNC JS.Agent.Dropper - AirBreak Downloader outbound connection"; flow:to_server,established; urilen:10; content:"/?news"; fast_pattern:only; http_uri; content:"MSIE 9.0|3B| Windows NT 6.1|3B|"; http_header; content:!"Referer"; http_header; pcre:"/\/[a-z]{3}\/\x3fnews$/Ui"; metadata:ruleset community, service http; reference:url,www.virustotal.com/#/file/075e66b5c3c5c2ce6f9d3aea86a72fed09f0eb91c03ec7dbbdb17d9d851807c8/detection; reference:url,www.virustotal.com/#/file/c5985720c542567b906b2329036d872d0d4ab380d1ea19a38c5ec6551be380ff/detection; classtype:trojan-activity; sid:8000189; rev:1;)

Thanks.
YM
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