Analysis

  • max time kernel
    200s
  • max time network
    214s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230915-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230915-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11/10/2023, 05:52

General

  • Target

    2023-08-26_ab2e25cf91ce1954b19e1004d4e3cb05_ryuk_JC.exe

  • Size

    7.8MB

  • MD5

    ab2e25cf91ce1954b19e1004d4e3cb05

  • SHA1

    bc848d40c299d9de88e41ddc780658eaab71a8e3

  • SHA256

    bc9761e636ca4473b8baa473b3158906a7b3f739abdb9c5dd78896b148cd605b

  • SHA512

    075085b6231c55b8a5fc2c8180770189f8d5d8ec95b4e811704501631450816d27347aa90184a028e4e54a9373481efa7ba60855d62ea9f81b09d0935b1b7304

  • SSDEEP

    98304:9E2RpMMHMMMvMMZMMMlmMMMiMMMYJMMHMMM6MMZMMMqNMMzMMMUMMVMMMYJMMzMd:9nwne

Score
10/10

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 2 IoCs
  • Drops startup file 3 IoCs
  • Executes dropped EXE 1 IoCs
  • Enumerates connected drives 3 TTPs 46 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Drops autorun.inf file 1 TTPs 3 IoCs

    Malware can abuse Windows Autorun to spread further via attached volumes.

  • Drops file in System32 directory 2 IoCs
  • Drops file in Program Files directory 12 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2023-08-26_ab2e25cf91ce1954b19e1004d4e3cb05_ryuk_JC.exe
    "C:\Users\Admin\AppData\Local\Temp\2023-08-26_ab2e25cf91ce1954b19e1004d4e3cb05_ryuk_JC.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Drops startup file
    • Enumerates connected drives
    • Drops autorun.inf file
    • Drops file in System32 directory
    • Drops file in Program Files directory
    • Suspicious use of WriteProcessMemory
    PID:3060
    • C:\Windows\SysWOW64\HelpMe.exe
      C:\Windows\system32\HelpMe.exe
      2⤵
      • Modifies WinLogon for persistence
      • Drops startup file
      • Executes dropped EXE
      • Enumerates connected drives
      • Drops autorun.inf file
      • Drops file in System32 directory
      PID:4632

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\$Recycle.Bin\S-1-5-21-1045988481-1457812719-2617974652-1000\desktop.ini.exe

    Filesize

    7.8MB

    MD5

    a17ddd1debf645385a2021dcdb114d22

    SHA1

    1519348e7e874bebdb4e152e97d5e891ee6a1deb

    SHA256

    76e80105ee1deebe3d6a9d3cab771cf062509b4f02b6829eedd55e7fcdaea386

    SHA512

    6cb671d87ec58acac606bde6e9a1d56087c2d2cbe6f0317bb2720bddaac628fd604751ac04bae6a487a8a308a8542af60ed9251c112d47a486f66091223464d7

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

    Filesize

    1KB

    MD5

    07bc2e03cb2a5cb89c5d22443d61a8ed

    SHA1

    3a00be4f217b513a2167e1bfbd301e12de8d3587

    SHA256

    c91a53ad70868bf56e7e148ab1d8b05c2ad3acca13f6a6e12716c65b0a6f082d

    SHA512

    341ee75fc6af2c08e482f4b92e0c93535ec31f3202fcae868372940461820a28922c310140671f9e3f29a416cd9ebe8928890138e6fd5137da211d19f7ed4f7e

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

    Filesize

    1023B

    MD5

    c1889025cb79f52582421dbfefd13fcf

    SHA1

    cc78ce28d90821d70d8dba447c6c1b6798dafd4d

    SHA256

    b45fd61b96df1282a5b0b411a2651a49f6c5570da092f9eb84947327df5f35b0

    SHA512

    82cdb5a21f759439bbc95e6d3fc699932d8e98d60c48f3c1710fe93ce94d49968c183a591f4b6320b36924ace6243dc7eb58fa4991855d15b46845809e42772d

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

    Filesize

    1KB

    MD5

    fb5afa7cdbb99ef9e7619aa3d1a083a3

    SHA1

    3a46e91f566cac2b49714a69ee1eed2e160f064b

    SHA256

    27b4a0bf186de952d23324aa6c998fe708abd7511b0e1b9bc36b38cd596058c0

    SHA512

    2f5e151dfe23569881051aa24318cf09416324c33c331b863c6380e4c3c6406bb59a3e3e6c5de7b6ccf75da72aa5b7eb9ccdd68a554bb48b3d6a4670b649ca86

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

    Filesize

    1023B

    MD5

    2096bc59390685477ebd959f4f6d0e15

    SHA1

    651c650cb2ad1feb1db8b89b09881bdfeef78605

    SHA256

    84fa53a5c23a8d323b202957bf528ccc0267a0af132ed2bdb826ff4a21808521

    SHA512

    24bccf9c8305bec53cd7a708f8177ef9f4d587cad4cb59f4380b4d18655cabfd1c563404036307dd59249468de4c2d87d4dc2fad45bf9697346478d3bb4b0c75

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

    Filesize

    1KB

    MD5

    f55e8d3edd3aca7ac8aeb5f394a9fb58

    SHA1

    440bf835dad9a2f93875d16e4bcae738605dc2b3

    SHA256

    b939c3783fca1f534c25f6f5aeabea965afd9742027d4c0f8cd382e514c357c3

    SHA512

    7902e12c8d9d4977f75a178c301fad989139ad423a4e1e5ab92add2b986aa072ed9e6d0bdbd57dda99d3992eeafbe2d8296bca8a663c26ef2e92f27d7c9ec3f8

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

    Filesize

    1KB

    MD5

    257a55f9cfd3d9eae88a965b9864c41c

    SHA1

    af8c66df41018be726fd2d6071047dfc5015253e

    SHA256

    806368e196923a20a5c68fc781d67d180421db8ecc0f6d34ef826747b564c4f3

    SHA512

    f7a88a1955d7d2447aeb6961437b9ecc0207f91f2804733aebf7f4ae4fd5e76ee61ae932e4696c8a48d86c41c2976332318efb5c5ae2350093397486b2d73c8d

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

    Filesize

    1023B

    MD5

    ebf23da5c44627e2f730c3435d5fc3f7

    SHA1

    00f46b9eb73206501967dc2894b9a41d484630bf

    SHA256

    247537c863c63165cd01fd29cf5ab663b8df5961fe0bf7d0b7ee68a3536a8024

    SHA512

    65fee6857b10490749a8b55b8d8c6c18c0a122e990b7f668602e828e125fa374e929e98a107fd6b542cbbb6cf79ebe7b444271f08bbd406430f4796f625ccb8b

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

    Filesize

    1KB

    MD5

    2df066197aceb4974f566320717c6bc1

    SHA1

    410ccb14cf987fd487d3c9f2a3c6c9ea4a72a73a

    SHA256

    d45087eb677c9a54b0a2dc739ba9e9bb3fc552454087eb9250a0015cedcdb7a2

    SHA512

    9c9d15238ac65fd149495b4079bd88be80720ac6505ecfabb47a07f4beaf3a61bb78651ac39abb9a866f79c09cea53099bf81f74f2c490c80625032a759f686c

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

    Filesize

    1023B

    MD5

    83d5d2e3b3beef2537bd3c77a7fd610e

    SHA1

    199a6cc0116c7b0ed90fdd61c378604b9d0d6bb0

    SHA256

    6e468e13cff5d295c0096214ae2283b47e570cb775d1f4fd67dbb058bc48d82a

    SHA512

    02ed7de7dbc9807b20df1dcdcf247a082fee98bd8cb0e4cb5b42e9e6e7089ae287b65a3c5ae30fcbe050210a56185bd42be73e80aecf09484feb5362292d3f61

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

    Filesize

    1KB

    MD5

    f5cdf6e1d8e6cbcaaf5ba822dd2314b1

    SHA1

    ffa3a687f7c8cacccb4b79529886b61cf0af02d6

    SHA256

    3d19b2cafa0068eb57e1ddbe93b1e74b68c932c6d228cd90f7df665e3c3173ce

    SHA512

    1f58da93d269e055c84871ee6596746f879949bdf096a38052774fd756ad4acb6c30904697447070b19e2e91bd4345725c10b1e332cbbd65f96b0d16b7dd02c8

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

    Filesize

    1KB

    MD5

    5b92f6ebe5f31795b8fb8ca786b7a844

    SHA1

    f47a6efe591d9214326d1c6232f17f9ddbafba36

    SHA256

    180ffa7d5685129e2dfd94bd4f0d9de2429506b46ae80c0f49d2499d2065dc1c

    SHA512

    c1451b0c33eff62ed05ae9dde719ca2eb3dbb195013cf0527d7ddc74fea8c8e844bf5bc81c68ac863fbc6f9fe6a892f0c5fbfba6e5d1a55139160b91245b51f8

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

    Filesize

    1KB

    MD5

    9248051e2da60d8a776c5b57fa84dc51

    SHA1

    e968cd5f6875948b5c98d230754e292957d0d3f7

    SHA256

    02e675fd7b3215a5fe1b161b06da2f7ddecd435ec029379c050e25f11485376e

    SHA512

    0bb33a5562ae67bdae890d3f3546b4f16bd078436dbdee83c40fe84e7bf72d410321b42f93221b33125e47fb85df4a472d87cbc70476f7e309ef4cf45da111b3

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

    Filesize

    1023B

    MD5

    a27b6d9c84d0e088136140e33f54127b

    SHA1

    32d7bd035d19e7015f395f017a7054ca2cdf8fa0

    SHA256

    427486eceb8b17f332a78966cb576dfa79113fd9024ffcd2106b23f5fce39460

    SHA512

    177250032f7f371855b0a12c1723e56b2a709b329097a036f899999431ba3bd954636b818b160956c12c63b32cb4a294d9840159aa0abed1da20cbf234ccbc6d

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

    Filesize

    1KB

    MD5

    670938bf4310bba08a6577913c561c47

    SHA1

    60d6b1a88aa02ee563dfdc93dff08b4659b7af18

    SHA256

    a4b7cfb4c283bc69a8a37d1f158e9c6231f591c4ea4f2b9dc0ad1a8cecdc009c

    SHA512

    492a3a7b6e5022f0a2243caf5208af99b5636d951b5f49fcc858aa34902cfecb7bc298a245f14f46b708ec556cf037f2b7c31f7b48345d3a4926129886ab42e1

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

    Filesize

    1023B

    MD5

    b8581ab8aa578a9102ddd68f31131862

    SHA1

    b0a8efd9d27b6308e62b0bb40fc433c270e87235

    SHA256

    c0b07746e5179a753ce8c0d8f2c79d18658ea239d200956b15354e7464e79fbc

    SHA512

    f5201564a9debe6b69b729d777022575ec0af8aaf6f968eeac05d13355342231a08347b81e3524d53b4f4e15f3999c865c80933ead1ef941a05854a323d7c5d3

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

    Filesize

    1KB

    MD5

    bd43e6e283de8c1302ae452958637bed

    SHA1

    e8a2ea3f77ad5eb464da628a7e8afaa6f7493268

    SHA256

    92ba0852545b6bb58cddbecefe63308e6c52352da997101e80f378cc1c21abc3

    SHA512

    1d54f3c0c6d52745b84e49694c6889e588287dccdba8746281a5b5ea23ef5a3656d84e127852dc8118ff230307e0306b4943ae8325c1eb01426e08ca7c37ab04

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

    Filesize

    1KB

    MD5

    71c5a597f847048f91607669b02f0d23

    SHA1

    1104d9c68f646e35add97ac18d59627b07d9483f

    SHA256

    34579902d6db9e6981829a779e4b76a8f0ac36561b06185fe2c5759200f7f9a9

    SHA512

    7bc8fd217b54b225a8bbc0afc6204e87b87191f5492de3357e31a98a3940df1748bc54d53035817dcb45ee63edd24c51360de7e5d3a3ce6d0262f756a5d3e2ef

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

    Filesize

    1KB

    MD5

    4af3e40043cf69c46aa606b1fec26532

    SHA1

    1d3138d93339fd909283ca212b53f5c923d71844

    SHA256

    c9878ee5d1e7ec0f152fc7e8c280e73e74f6cdba385e34978a80f223dd04a57b

    SHA512

    38afcba33ef8f5d67340bab71bf76271e2cbabd1e4fd002e2709d9b4f5e47606a7acc132e14c05358602e5cd6f1ee38da7005630c68db9856f7fe15ffd5dc23b

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

    Filesize

    1KB

    MD5

    fb8755b55e5ef841c46679fd41916885

    SHA1

    103cc4eadba280be2161ed25fa2f9519b5d0883c

    SHA256

    1563fc2fb273d683fca4d81357d974d7185a75f8cca0f2598ed4dc608ed90e43

    SHA512

    165ccccca8f7d75851601bc7ec922c59c2a2821a9bd8b581ef2ea7979fa9d861ab0b79bb0c09d56fc97bb15b60fcdfd0bf3c21b420c6978b57fc004a22aab000

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

    Filesize

    1KB

    MD5

    bf14784baa74fc15011cb8397ae43c34

    SHA1

    f504f95fa0825827a010c84eec2c8ec8e41ac49f

    SHA256

    b83ad1c976d505b08c25eb4a020b392ffb72aaf16f1c2990dcaf9a848623b2c2

    SHA512

    ac184738314e7b8efabddbe535547d677103950f10a67b81234f5f0f5f72b43855bfdd2a0fff713b497bd0e2fd083eb2ad0400865490c95053836e17983c1565

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

    Filesize

    1023B

    MD5

    7a9ba5d4a11e5fd450347d3cc7cad051

    SHA1

    f095816266fc6c021d06fb3e2b743899f4f8262d

    SHA256

    341a9a1214e96d133d9cdaecca04ed494e5b15193650a49b5afdf89e5956e0cd

    SHA512

    27ba2f4d087b8cf1335974337fa1a7c940b0fbe60f22aab02b6de163081d2aa00afa415c640d8ece9a624c752c066f428074b901293ccfad446a5a5ecade1afe

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

    Filesize

    1023B

    MD5

    7a9ba5d4a11e5fd450347d3cc7cad051

    SHA1

    f095816266fc6c021d06fb3e2b743899f4f8262d

    SHA256

    341a9a1214e96d133d9cdaecca04ed494e5b15193650a49b5afdf89e5956e0cd

    SHA512

    27ba2f4d087b8cf1335974337fa1a7c940b0fbe60f22aab02b6de163081d2aa00afa415c640d8ece9a624c752c066f428074b901293ccfad446a5a5ecade1afe

  • C:\Windows\SysWOW64\HelpMe.exe

    Filesize

    7.8MB

    MD5

    7fa73f041f8298c8d89fc4494bafd149

    SHA1

    481a04bca719f2b1a164687f1e2bf5c67e7d2371

    SHA256

    88e4a8eca9cc1fee0b639f14a6dfa85ebe04a9c6fe0353c97fc89057f2788627

    SHA512

    670710ae123219f5e6ec43319c06d8c04b4208cb63e6cd87b7ca988a9d1edc896a87b9f055f058b8cd0cde971b6f0add9d2161418adebc9015275ae8fef0816f

  • C:\Windows\SysWOW64\HelpMe.exe

    Filesize

    7.8MB

    MD5

    7fa73f041f8298c8d89fc4494bafd149

    SHA1

    481a04bca719f2b1a164687f1e2bf5c67e7d2371

    SHA256

    88e4a8eca9cc1fee0b639f14a6dfa85ebe04a9c6fe0353c97fc89057f2788627

    SHA512

    670710ae123219f5e6ec43319c06d8c04b4208cb63e6cd87b7ca988a9d1edc896a87b9f055f058b8cd0cde971b6f0add9d2161418adebc9015275ae8fef0816f

  • F:\$RECYCLE.BIN\S-1-5-21-1045988481-1457812719-2617974652-1000\desktop.ini.exe

    Filesize

    7.8MB

    MD5

    70d10bb8e547c1f7f4a83ef5c8167d8a

    SHA1

    55190129c660ce4b91a96a7f8bda697d3ad23ddb

    SHA256

    bdda252322f6e4cfaf5fcb93e9717982dfe9e09da1f0a5f4eb64a22e7d5a178b

    SHA512

    296df45ca25e4b0338cf7c65813ccccf6cb248a845ede1250f140566508d2c3a80b6c3824881150c34573a12570206173c769f1d9d715669c656c6f2edbef126

  • F:\AUTORUN.INF

    Filesize

    145B

    MD5

    ca13857b2fd3895a39f09d9dde3cca97

    SHA1

    8b78c5b2ec97c372ebdcef92d14b0998f8dd6dd0

    SHA256

    cfe448b4506a95b33b529efa88f1ac704d8bdf98a941c065650ead27609318ae

    SHA512

    55e5b5325968d1e5314527fb2d26012f5aae4a1c38e305417be273400cb1c6d0c22b85bddb501d7a5720a3f53bb5caf6ada8a7894232344c4f6c6ef85d226b47

  • F:\AutoRun.exe

    Filesize

    7.8MB

    MD5

    ab2e25cf91ce1954b19e1004d4e3cb05

    SHA1

    bc848d40c299d9de88e41ddc780658eaab71a8e3

    SHA256

    bc9761e636ca4473b8baa473b3158906a7b3f739abdb9c5dd78896b148cd605b

    SHA512

    075085b6231c55b8a5fc2c8180770189f8d5d8ec95b4e811704501631450816d27347aa90184a028e4e54a9373481efa7ba60855d62ea9f81b09d0935b1b7304

  • memory/3060-0-0x0000000000400000-0x000000000047B000-memory.dmp

    Filesize

    492KB

  • memory/3060-1-0x0000000000680000-0x0000000000681000-memory.dmp

    Filesize

    4KB

  • memory/3060-42-0x0000000000400000-0x000000000047B000-memory.dmp

    Filesize

    492KB

  • memory/3060-49-0x0000000000680000-0x0000000000681000-memory.dmp

    Filesize

    4KB

  • memory/4632-6-0x0000000000620000-0x0000000000621000-memory.dmp

    Filesize

    4KB

  • memory/4632-58-0x0000000000400000-0x000000000047B000-memory.dmp

    Filesize

    492KB