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Splunking_webproxy
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odorusatoshi
December 10, 2018
Technology
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Splunking_webproxy
最初の Web Proxyログ分析
odorusatoshi
December 10, 2018
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Transcript
© 2017 SPLUNK INC. © 2017 SPLUNK INC. © 2017
SPLUNK INC. © 2017 SPLUNK INC. 4QMVOLΛͬͨ1SPYZϩάੳ ࣄނલఏࣾձʹ͓͚Δઆ໌ΛՌͨ͢ڥͮ͘ΓΛࢦͯ͠ 4QMVOL 4FSWJDFT+BQBO 4BMFT&OHJOFFSԣా ૱ WFS 4UFQ1SPYZϩάੳ
© 2017 SPLUNK INC. © 2017 SPLUNK INC. ▶ ༇շ൜͔ΒɺαΠόʔ൜ࡑϏδωεͷมԽ
• ѹత༗རͳঢ়گͰࣥ፠ʹ߈ܸΛ܁Γฦ͢αΠόʔ൜ࡑ৫ ▶ ैདྷͷ༧తͳରࡦͰؾ͚ͮͳ͍ʢݕͰ͖ͳ͍ʣ߈ܸͷ૿Ճ • ֎෦௨ใʹΑΓ߈ܸʹؾׂ͍ͮͨ߹ Ҿ༻ݩɿ .BOEJBOU .5SFOETSFQPSU ▶ ༗ࣄͷࡍʹΘΕΔઆ໌ • ηΩϡϦςΟ݉ͷ*5෦ͰਐΊΔΠϯγσϯτରԠͷऔΓΈʢҾ༻ݩɿઐऀ͕͍ͳ͍ ೋΰϧϑͷηΩϡϦςΟରࡦज़આ໌ΛՌͨ͢ڥͮ͘Γ ʣ ߈ܸऀ༏ͷηΩϡϦςΟ ɾɾɾ'JSF&ZF IUUQTXXXGJSFFZFDPNDPOUFOUEBNGJSFFZFXXXQBSUOFSTQEGTTC.BSTI'JSF&ZFQEG ɾɾɾ;%/FU+BQBOʢIUUQTKBQBO[EOFUDPNBSUJDMFʣ
© 2017 SPLUNK INC. © 2017 SPLUNK INC. ▶ TZTMPHαʔόʹอͯ͋͠Δ1SPYZϩάʢ̏ϲ݄ʣΛHSFQݕࡧ
▶ ݕࡧ݁Ռ͕ग़ἧ͏·Ͱɺͭ͜ͱ࣌ؒʙ ▶ Πϯγσϯτ͋ͬͨͷ͔ɺͳ͔ͬͨͷ͔ɺෆ҆ͳ࣌ؒΛͬͯա͢͝ɻɻɻ ͜Μͳܦݧ͋Γ·ͤΜ͔ʁ DBUBDDFTT@MPH cHSFQIUUQYYYZZZDO *5ӡ༻୲ऀ"͞Μ ˓˓෦ ʮ͜ͷ63-ʹΞΫηεͨ͠ਓ͕͍ͳ͔͔ͬͨ ࢸٸௐࠪͯ͘͠Εʂʯ
© 2017 SPLUNK INC. © 2017 SPLUNK INC. ༧తରࡦ͕͢Γൈ͚ΒΕΔࣄΛఆ͠ɺ֤εςοϓͰ৵ೖΛલఏͱͨ͠ൃݟతରࡦ͕ඞཁͰ͢ɻ Πϯλʔωοτ
෦͚%.; ෦ωοτϫʔΫ ߈ܸऀ ֎෦͚%.; ίϚϯυ ίϯτϩʔϧ αʔό ܭըཱҊ ߈ܸ४උ ॳظજೖ ج൫ߏங ෦ௐࠪɾ৵ೖ తߦ ࠶৵ೖ *1"ʹΑΔରࡦɿηΩϡϦςΟઓུͱ߈ܸϧʔτ ൃݟతରࡦʹ༗ޮͳϩάੳͷख๏Λ֤εςοϓ͝ͱʹ͝հ 参考元: IPA 「『高度標的型攻撃』対策に向けたシステム設計ガイド」の公開 / (https://www.ipa.go.jp/security/vuln/newattack.html ೖޱରࡦ ෦ରࡦ ग़ޱରࡦ ग़ޱରࡦ
© 2017 SPLUNK INC. © 2017 SPLUNK INC. Πϯλʔωοτ ෦͚%.;
෦ωοτϫʔΫ 'JSF8BMM 41". ϑΟϧλ ϝʔϧαʔό %/4 8FC1SPYZ ϑΝΠϧ αʔό "DUJWF %JSFDUPSZ %#αʔό ߈ܸऀ ֎෦͚%.; 8FCΞϓϦ αʔό *%4*14 8"' 8FCΞϓϦ αʔό 4BOECPY 1$ Ξϯν Πϧε %-1 &%3 ίϚϯυ ίϯτϩʔϧ αʔό ग़ޱରࡦͷϩάੳϙΠϯτྫ ܭըཱҊ ߈ܸ४උ ॳظજೖ ج൫ߏங ෦ௐࠪɾ৵ೖ తߦ ࠶৵ೖ ग़ޱରࡦ ग़ޱରࡦ
© 2017 SPLUNK INC. © 2017 SPLUNK INC. ▶ 8FC
1SPYZαʔόͰɺ1$͔Βͷ8FCαΠτΛӾཡ͢ΔͨΊͷϦΫΤετΛه͢Δ͜ͱ͕Ͱ ͖·͢ɻ ▶ ͦͷͨΊ)551ͳͲͷ௨৴ϓϩτίϧΛ༻͍ͯίϚϯυίϯτϩʔϧαʔόͱ௨৴͢ΔϚϧ ΤΞͷ׆ಈͷهΛϞχλϦϯά͢Δ࠷ॳͷεςοϓͱͯ͠1SPYZϩάΛਖ਼͘͠هอ͠ɺ ੳͰ͖ΔΈΛ༻ҙ͢Δ͜ͱΛਪ͠·͢ɻ ▶ දతͳ1SPYZϩάੳͷϢʔεέʔεͱੳํ๏ʹ͍ͭͯ͝հ͠·͢ɻ ࢀߟɿ1SPYZϩάੳ͕ͳͥ༗ޮͳͷ͔ʁ ϚϧΣΞ (&51045ϦΫΤετ 8FCΞΫηεϩά ίϚϯυίϯτϩʔϧ αʔό 8FC1SPYZ 参考元: JPCERT CC / 高度サイバー攻撃への対処におけるログの活用と分析方法 (https://www.jpcert.or.jp/research/APT-loganalysis_Report_20151117.pdf)
© 2017 SPLUNK INC. © 2017 SPLUNK INC. ▶ #MVF$PBU1SPYZ4(
TZNBOUFDࣾ ▶ *OUFS4DBO 8FC4FDVSJUZ 5SFOE.JDSPࣾ ▶ *OUFS4BGF 8FC'JMUFS "-4*ࣾ ▶ J'*-5&3 %JHJUBM"SUTࣾ ͳͲ දతͳ1SPYZ ԼهΛදͱ͢Δ1SPYZʢ࣌ʣΛ͝ར༻ͷ߹ɺຊϢʔεέʔε͕ར༻͍͚ͨͩ·͢ɻ
© 2017 SPLUNK INC. © 2017 SPLUNK INC. 1SPYZϩάੳϢʔεέʔεྫ ࢹਪ
త ੳϢʔεέʔε ੳํ๏ ҙࣄ߲ ڧ͘ਪ ϚϧΣΞײછ1$ͷ ൃݟ ֎෦ػ͔ؔΒͷ௨ใ࣌ʹײછ Λಛఆ 63-Λݕࡧ͠1SPYZϩάͱಥ߹ ڧ͘ਪ ϚϧΣΞ৴ݩ 63-ͷಛఆ 3FGFSFS͔ΒϦμΠϨΫτݩ 63-Λಛఆ ෆਖ਼63-ͷൃݟ࣌ʹ߹ΘͤͯϦμΠϨΫ τݩ63-֬ೝ͠ɺվ͟Μݩ63-ΞΫ ηεͨ͠Λચ͍ग़͢ɻ 1SPYZϩάͷग़ྗ༰ΛσϑΥϧτ͔Β มߋ͢Δඞཁ͋Γɻ ਪ ϚϧΣΞײછ1$ͷ ൃݟ 4BOECPYػثͳͲͰݕͨ͠63- ͱಥ߹͠ײછΛಛఆ ࢀরϦετʢMPPLVQϑΝΠϧ ྫɿ CMBDLMJTUDTW ʣΛ༻ҙͯ͠ɺ1SPYZϩά ͷ63-ͱಥ߹ݕࡧΛߦ͏ɻ ਪ 63-ΞΫηεͷ ՄࢹԽ 8FC௨৴ͷτϥϑΟοΫੳ 8FC"OBMZ[FS"QQͳͲΛ׆༻͠μο γϡϘʔυΛݩʹͷݟ͑ΔԽ Ͱ͖Ε ϚϧΣΞײછ1$ͷ ൃݟ ෆ৹ͳ6TFS"HFOUͷݕ ڐՄࡁΈ8FCϒϥβҎ֎ͷ6TF"HFOU ར༻ͷݕɻ ࣄલʹࣾ1$ͱ8FCϒϥβͷΈ߹ Θͤຖʹར༻͞ΕΔ6TFS"HFOUΛϗϫ ΠτϦετԽ͢Δඞཁ͋Γɻ Ͱ͖Ε ϚϧΣΞײછ1$ͷ ൃݟ ϚϧΣΞʹΑΔϏʔίχϯά௨ ৴ͷݕ Ұఆ࣌ؒʹසൟʹΞΫηεΛ܁Γฦ͠ ͍ͯΔ֎෦υϝΠϯ63-Λݕɻ ਖ਼نͷΞοϓσʔτ௨৴ݕ͢Δࣄ͕ ଟ͍ͨΊɺ࠷ॳʹਖ਼نυϝΠϯͷϗϫΠ τϦετԽ࡞ۀΛซ༻͢Δɻ қ͍͠ ͍͠ ੳ࡞ۀͷෛՙͷϨϕϧʹԠͨ͡දతͳ 1SPYZੳϢʔεέʔεྫΛԼهʹهࡌ͠·͢ɻ
© 2017 SPLUNK INC. © 2017 SPLUNK INC. ֎෦͔Βͷ௨ใ4BOECPYػثͳͲͰݕͨ͠63-ͱಥ߹͠ײછΛಛఆ ᶃ63-ΛࢀরϦετʢCMBDLMJTUDTWʣʹࣗಈొ͠·͢ɻ
ᶄ1SPYZϩάʹͯɺ௨৴ޭʢBDUJPOBMMPXFEʣʹͳ͍ͬͯΔ߹ɺϚϧΣΞʹײછ͠ίϚϯυΞϯυίϯτϩʔϧαʔόͱͷ ௨৴͕ଓޭ͍ͯ͠Δ͜ͱ͕Θ͔Γ·͢ɻ͕ಛఆͰ͖ͨޙ 1$ͷִௐࠪ෮چΛߦ͍·͢ɻ αϯϓϧΠϝʔδ
© 2017 SPLUNK INC. © 2017 SPLUNK INC. 4QMVOLΛͬͨ8FC1SPYZϩάੳͷޮՌ ログ取得依頼受け付けました。
共有サーバにアップロードする までお待ちください DBUBDDFTT@MPH cHSFQIUUQYYYZZZDO Splunk 有りのAさん (Proxy取得済み) ࣌ؒʙ ʙ ӡ༻αϙʔτ૭ޱ ڞ༗αʔό ݕࡧ ϩά%- Splunk 無しのBさん ௐࠪ։࢝ ௐࠪ։࢝ ௐ͍ͨΩʔϫʔυͰݕࡧ 報告書 作成 औಘґཔ ͪ࣌ؒ ݕࡧ݁Ռͪ࣌ؒ ͪ࣌ؒ 報告書 作成 4QMVOLΛͬͨ߹ɺΠϯγσϯτௐࠪ࣌ؒͷѹతͳݮ͕ՄೳʹͳΓ·͢ɻ
© 2017 SPLUNK INC. © 2017 SPLUNK INC. ߋʹʂ1SPYZͱΈ߹ΘͤΔࣄͰ༗ޮͳσʔλʹ͍ͭͯ Webアクセスログ、アラート、ITアセットなどを一元的に集約し繋ぎ合わせておく事で、インシデントの調査効
率をあげることが可能です。 8FCΞΫηεϩά 8FC1SPYZ 4BOECPY *5Ξηοτใ ɾ࣌ؒ ɾ*1ΞυϨε ɾ63- ɾϦεΫ ɾ࣌ؒ ɾ*1ΞυϨε ɾϢʔβʔ໊ ɾίϯϐϡʔλ໊ ɾ৫ Ϣʔβʔ໊ɿ5BSP:BNBEB ৫ɿ*5෦ ίϯϐϡʔλ໊ɿ8*/999 *1ΞυϨεɿ ࣌ؒɿ ଓઌ 63-ɿIUUQYYYZZZDO ΞΫγϣϯɿڐՄ ϦεΫɿߴ ϦμΠϨΫτݩ63-IUUQRB[DO ɾ࣌ؒ ɾ*1ΞυϨε ɾ63- ɾΞΫγϣϯ ɾϦμΠϨΫτݩ 63-
© 2017 SPLUNK INC. © 2017 SPLUNK INC. © 2017
SPLUNK INC. © 2017 SPLUNK INC.