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Drupalgeddon2 をハニーポットで観察してみた

Drupalgeddon2 をハニーポットで観察してみた

2018年6月30日 第4回 ハニーポッター技術交流会 発表資料 @morihi_soc #hanipo_tech
https://hanipo-tech.connpass.com/event/90337/

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Kazuaki Morihisa

June 30, 2018
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  1. Drupalgeddon2 ΛϋχʔϙοτͰ؍࡯ͯ͠Έͨ XIPBNJ w ৿ٱ࿨ত !NPSJIJ@TPD  w ຊۀ͸ωοτϫʔΫηΩϡϦςΟΤϯδχΞɾΞφϦετ w

    झຯͰϋχʔϙοτͷӡ༻Λ͢Δϋχʔϙολʔ w ϒϩάˠIUUQXXXNPSJIJTPDOFU w ϋχʔϙολʔٕज़ަྲྀձओ࠵ऀ w IUUQTIBOJQPUFDIDPOOQBTTDPN 2 ࠓ·Ͱʹ͓ੈ࿩ʹͳͬͨΠϕϯτ(Ұ෦) ɾ*5,FZT ݱ4FD$BQ  ɾωοτϫʔΫύέοτΛಡΉձ Ծ  ɾ/*4$αΠόʔϋϩ΢Οϯ ɾ*OUFSOFU8FFLɾ)BSEFOJOH ɾTTNKQɾ"*4FDɾ4UVEZ$PEF ɾULULηΩϡϦςΟษڧձ ɾ૯ؔ੢αΠόʔηΩϡϦςΟ-5େձ ग़൛ͨ͠ຊ΍ٕज़ಉਓࢽ
  2. Drupalgeddon2 ΛϋχʔϙοτͰ؍࡯ͯ͠Έͨ %SVQBMHFEEPOͱ͸ w %SVQBMʹ͸ɺϦϞʔτ͔Β೚ҙͷίʔυ͕࣮ߦՄ ೳͱͳΔ੬ऑੑ $7& ͕ଘࡏ͠ɺ͜ͷ ੬ऑੑΛѱ༻͢Δ͜ͱͰɺԕִͷୈࡾऀ͕ɺඇެ։ σʔλΛ઄औͨ͠ΓɺγεςϜσʔλΛվมͨ͠Γ

    ͢ΔͳͲͷՄೳੑ͕͋Δͱͷ͜ͱͰ͢ɻ w ӨڹΛड͚Δόʔδϣϯ͸࣍ͷ௨Γɻͨͩ͠αϙʔ τ͕੾Ε͍ͯΔݹ͍όʔδϣϯ΋ӨڹΛड͚ΔՄೳ ੑ͕͋Γɻ w %SVQBMΑΓલͷόʔδϣϯ w %SVQBMΑΓલͷόʔδϣϯ 4 JPCERT/CC ͷϖʔδ͔ΒҾ༻ https://www.jpcert.or.jp/at/2018/at180012.html
  3. Drupalgeddon2 ΛϋχʔϙοτͰ؍࡯ͯ͠Έͨ ڪාͷେԦ;ͨͨͼ w ೥݄೔%SVQBMެ͔ࣜΒɺिؒޙʹηΩϡ ϦςΟϦϦʔεΛ͢Δͱͷൃද  w ೥݄೔$7&ͷ੬ऑੑΛमਖ਼ ͨ͠όʔδϣϯ͕ެ։

     w ೥݄೔ηΩϡϦςΟݚڀऀʹΑΓɺϦϞʔ τίʔυ࣮ߦͷղੳ৘ใ͕ެ։ ɻ
 ೥ͷ੬ऑੑ $7& Λኲኵͱͤ͞Δ ΄Ͳةݥ౓͕ߴ͘ɺ%SVQBMHFEEPOͱݺ͹ΕΔɻ 5 *1 https://www.drupal.org/psa-2018-001 *2 https://www.drupal.org/SA-CORE-2018-002 *3 https://research.checkpoint.com/uncovering-drupalgeddon-2/ ը૾Ҿ༻ݩˣ https://scanforsecurity.com/news/drupalgeddon-2-vulnerability-used-infect-servers-backdoors-coinminers.html
  4. Drupalgeddon2 ΛϋχʔϙοτͰ؍࡯ͯ͠Έͨ ߈ܸࣄྫ ϑΝΠϧ࡞੒ w 04ίϚϯυ࣮ߦػೳͱϑΝΠϧΞοϓϩʔυػೳ Λ࣋ͭ8FC4IFMMͩͬͨ 16 ※WebShell ͸ɺϒϥ΢β͔Β

    Web αʔόΛૢ࡞͢Δ͜ͱ͕Ͱ͖ΔϓϩάϥϜɻ
 ৄ͘͠͸ ٕज़ಉਓࢽͷʮWebShell ਤේʯΛݟͯͶ! https://booth.pm/ja/items/718303
  5. Drupalgeddon2 ΛϋχʔϙοτͰ؍࡯ͯ͠Έͨ ௿ର࿩ܕͱߴର࿩ܕͷൺֱ w ϋχʔϙοτ͸͍͔ͭ͘෼ྨ͢Δํ๏͕͋Γ·͢ w ௿ର࿩ܕ ྫɿ808)POFZQPU  w

    ࣮ࡏ͢Διϑτ΢ΣΞΛ໛฿͢Δํࣜ w ϩά෼ੳ͠΍͘͢ͳ͍ͬͯΔ͕ɺ੬ऑੑͷ໛฿͸
 ׬ᘳʹͰ͖ͳ͍ɻ w ߴର࿩ܕ ྫɿ"QBDIF 1)1 %SVQBM  w ιϑτ΢ΣΞΛͦͷ··࢖͏ํࣜ w ຊ෺ͳͷͰඪతΛߜͬͨ߈ܸΛݕ஌͠΍͍͕͢ EBZͷ੬ऑੑʹΑΓɺϛΠϥऔΓ͕ϛΠϥঢ়ଶʹ ͳΓ͔Ͷͳ͍ɻ 18
  6. Drupalgeddon2 ΛϋχʔϙοτͰ؍࡯ͯ͠Έͨ %SVQBMHFEEPOͰݟΔ௿ɾߴର࿩ܕ w ௿ର࿩ܕͰ͋Δ808)POFZQPUͷݕ஌ঢ়گͱ
 ߴର࿩ܕͰ͋Δ%SVQBMͷϋχʔϙοτͷݕ஌ঢ়گ Λൺֱͯ͠Έͨ w ΋ͪΖΜ%SVQBM͸ύονΛଈ೔ద༻ࡁΈɻ w

    %SVQBMͷϋχʔϙοτ͸ɺ808)POFZQPUΑΓ গ͠લ͔Βެ։ͯ͠߈ܸ৘ใΛऩू͍ͯͨ͠ɻ w ͪΐ͏Ͳ%SVQBMHFEEPO͕ग़ͨͱ͖͸ɺผʑͷαʔ όͰ؅ཧ͍ͯͨ͠ͷͰɺൺֱ͕Մೳͩͬͨɻ w ͨͩ͠ɺ%SVQBMͷϋχʔϙοτ͸୆͔͠Քಇͯ͠ ͓Βͣɺ808)POFZQPUͷํ͕୆਺͕ଟ͍ɻ 19
  7. Drupalgeddon2 ΛϋχʔϙοτͰ؍࡯ͯ͠Έͨ ॳճͷ߈ܸݕ஌೔ w ͓͞Β͍ w ೥݄೔ʹ੬ऑੑ͕ެ։ɺ݄೔ʹ੬ऑ ੑͷղઆ͕ެ։ɻ 20 ؍ଌ஍఺

    ॳճݕ஌೔ %SVQBMͷߴର࿩ܕϋχʔϙοτ ݄೔ 808)POFZQPU ௿ର࿩ܕ ݄೔ ࢀߟ ܯࢹிΠϯλʔωοτఆ఺؍ଌγεςϜ  ݄೔ ࢀߟ NPSJIJTPDͷϒϩά 8PSE1SFTT ݄೔ *1 https://www.npa.go.jp/cyberpolice/detect/pdf/20180418.pdf
  8. Drupalgeddon2 ΛϋχʔϙοτͰ؍࡯ͯ͠Έͨ ϋχʔϙοτͷछผʹΑΔ߈ܸ؍ଌߟ࡯ w NPSJIJTPDͷϋχʔϙοτ؀ڥͰ͸ɺ%SVQBMΛ࢖ͬ ͍ͯΔͱ͜Ζ͕࠷΋ૣ͘߈ܸΛݕ஌ͨ͠ɻ w ੬ऑੑ͕ެ։͞ΕͨΒɺ੬ऑੑ͕͋Γͦ͏ͳͱ͜ Ζ͕ɺਅͬઌʹૂΘΕΔɻ w

    ͱ͸͍͑ɺ௿ର࿩ܕͷϋχʔϙοτͰ΋߈ܸͷ؍ଌ ͸Մೳͩͬͨɻ w 8PSE1SFTTͷΑ͏ͳɺ੬ऑੑͷର৅ͱϛεϚον ͳ؀ڥ͸ɺ߈ܸͷ؍ଌʹ͕͔͔࣌ؒΔɻ w αϯϓϧ਺͕গͳ͍ͷͰۮવ͔΋͠Εͳ͍ɻ 21