Analysis

  • max time kernel
    118s
  • max time network
    119s
  • platform
    windows7_x64
  • resource
    win7-20240419-en
  • resource tags

    arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system
  • submitted
    26/05/2024, 09:55

General

  • Target

    2024-05-26_9c772fdfec3835b0c3c00a027f1dfcbf_bkransomware_karagany.exe

  • Size

    13.4MB

  • MD5

    9c772fdfec3835b0c3c00a027f1dfcbf

  • SHA1

    c69ed96ee33a5d8a823b464e1143d297c4d9270b

  • SHA256

    dd547a0e134225a5b413ebe9fb894cf47a4f2aa72f69083d900086bf7238896c

  • SHA512

    4aaa22091a8970e28149c53ec26ff4470d862d5fa27d668b37db51220114ae200b29bf07fad0b91d7b041d9bed0fe7136d805892d3b4b4fd2a0e3259b630aaa7

  • SSDEEP

    393216:kM0FqXmW4bmncnqXmmN9DW+bRbD54XmPH:rXfn1nziw4XmPH

Score
7/10

Malware Config

Signatures

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 6 IoCs
  • Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

    Bootkits write to the MBR to gain persistence at a level below the operating system.

  • Checks processor information in registry 2 TTPs 5 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies Internet Explorer settings 1 TTPs 1 IoCs
  • Modifies system certificate store 2 TTPs 2 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-26_9c772fdfec3835b0c3c00a027f1dfcbf_bkransomware_karagany.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-26_9c772fdfec3835b0c3c00a027f1dfcbf_bkransomware_karagany.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:2208
    • C:\Users\Admin\AppData\Local\Temp\joi1DBE.tmp\join.me.exe
      "C:\Users\Admin\AppData\Local\Temp\joi1DBE.tmp\join.me.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Writes to the Master Boot Record (MBR)
      • Checks processor information in registry
      • Modifies Internet Explorer settings
      • Modifies system certificate store
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2816
      • C:\Users\Admin\AppData\Local\Temp\joi1DBE.tmp\LMIGuardianSvc.exe
        C:\Users\Admin\AppData\Local\Temp\joi1DBE.tmp\LMIGuardianSvc /escort 2816 /CUSTOM JoinMe
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious use of AdjustPrivilegeToken
        PID:2840

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Local\Temp\Cab58BC.tmp

          Filesize

          68KB

          MD5

          29f65ba8e88c063813cc50a4ea544e93

          SHA1

          05a7040d5c127e68c25d81cc51271ffb8bef3568

          SHA256

          1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184

          SHA512

          e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa

        • C:\Users\Admin\AppData\Local\Temp\Tar58DF.tmp

          Filesize

          177KB

          MD5

          435a9ac180383f9fa094131b173a2f7b

          SHA1

          76944ea657a9db94f9a4bef38f88c46ed4166983

          SHA256

          67dc37ed50b8e63272b49a254a6039ee225974f1d767bb83eb1fd80e759a7c34

          SHA512

          1a6b277611959720a9c71114957620517ad94541302f164eb872bd322292a952409bafb8bc2ac793b16ad5f25d83f8594ccff2b7834e3c2b2b941e6fc84c009a

        • C:\Users\Admin\AppData\Local\Temp\joi1DBE.tmp\LMIGuardianDll.dll

          Filesize

          1.5MB

          MD5

          aa7ab143962f5fbc52f10f0485c182f5

          SHA1

          86de4af44a455a2480556d87768b46b51e54dcca

          SHA256

          29243fcbca0e35d711607b1a02cabda38f15f5fa0809a65294c9909d705f9c31

          SHA512

          9b632a8b63241ee089b3e81d65b5b3943e7c40b533cfe57ced07cf84730f21c8904d68d7ca6153d296bcebd59fa5fee69cdd0e6ff33d09d8ca22169ce2860817

        • C:\Users\Admin\AppData\Local\Temp\joi1DBE.tmp\LMIGuardianSvc.exe

          Filesize

          402KB

          MD5

          e5bc10fa77e71a0948b9d38632fa2ecc

          SHA1

          709c19ab35658c556597d18ba71233cf6f6f5f35

          SHA256

          583522d591ee99459d4094f0df29f48899da77e73e4a35082c8d331e17304fd1

          SHA512

          6c01ae41273435a81fcf88d2e4a3ce3a3d9b1977764f01db564051f4ba9fc1601ac9682e5d7ae9be54c8c05d5d80a9e52f73957feee86e726e1ba83c7569b2ee

        • C:\Users\Admin\AppData\Local\Temp\joi1DBE.tmp\MediaClientLib.dll

          Filesize

          5.0MB

          MD5

          25c45f5e347142e7616c492d52e1cf9d

          SHA1

          b349bae558a80129154913878775a99749fb4241

          SHA256

          99b6997d537dd677683e3edb12446d2db2bd94687c2cbd6766cfb1eefe06a405

          SHA512

          a25a26b16272f9f3437cbd18938b0e45e73a25e615a624c81a7def6b541921c804163c25d2803fbda460e8f7fc9a6a847ffec3658d3483fd390de8f86980044d

        • C:\Users\Admin\AppData\Local\Temp\joi1DBE.tmp\config.json

          Filesize

          389B

          MD5

          12cbad23d957aa62e524bff967fa7d8e

          SHA1

          4443d322d2cc9ad299f07f69d5fc2e18276280f6

          SHA256

          0792ee8d56f1501836ce892d58570e82bb03ceff68aef466f3e3c1b71955617b

          SHA512

          c1cc9ea0aca722b81b1be946631777787a75fbe374f353cae2ebd0657f8d31dd8232fc558759c60ba5810012e47c7f7b02cac60d6081457c318d024c6ebe11e2

        • C:\Users\Admin\AppData\Local\Temp\joi1DBE.tmp\jmlaunchermgr.dll

          Filesize

          303KB

          MD5

          8ddeb2c511abea126f9d877b11e39675

          SHA1

          e7daf1b32f95db2ae043b8ebef2e97f2f3de2ed8

          SHA256

          3ed491aa892526ee4092fa6c3bd7baf713dedc7a2c9a511d4e6390a146a4ab45

          SHA512

          ad702279f4990ec07490e29fb95d194af2780fba8ff1fc1f57be4433cd69f8b61a78e62ad45256b418647d3b28825bec201dd0516500a5836e500c492cf933f2

        • C:\Users\Admin\AppData\Local\Temp\joi1DBE.tmp\jmsettings.dll

          Filesize

          182KB

          MD5

          18ef170348f43c491b91ebaad8f0144c

          SHA1

          f0d19881843091b230f35b6d5f9fd1b2b8a2f373

          SHA256

          264b285d96d48ee8e99c946f73ee472d8796a039318726e2683bc9141b99b7ed

          SHA512

          73723d42e0ec5890c1d02136370486b07296671de6ff770594896064fa2457a577e67db660e32f045d58ec3d063e293b5833d244adb00d736fb10f57307146e2

        • C:\Users\Admin\AppData\Local\Temp\joi1DBE.tmp\join.me.log

          Filesize

          5KB

          MD5

          1c5a83366552643d5b56306ccbcffc64

          SHA1

          73050989d7e56745d747e6a31d311f86e4843ca5

          SHA256

          8c6dbe61349d24d7d7e1d1f2c715e31a2eb4d32803d19a827fd573e0be098340

          SHA512

          a0e07cdda04fb12d7210edb52129fd8798ffe902bf51482316d17129e5eace2004ee717c23f8510d4ed7be55fd95addc82373e92cbc357dbc03a352e7c02c109

        • \Users\Admin\AppData\Local\Temp\joi1DBE.tmp\join.me.exe

          Filesize

          31.0MB

          MD5

          7a87e7f5002f91e2e6ab0829040183be

          SHA1

          e988076aa1ca2d6e0318d56beda36e75b9f1c05d

          SHA256

          75c5b10e30c41bcd5f455b62e8db26b5f0da9bc15d8453769ff096f6d9f7fe14

          SHA512

          73f9c480c8adb40450e4fbe38b2350c277392b3721164a7d7228594a8bb670f1e818f938f20fd8c7e3f6a4ece4bc28f50d1391edea719a6874ea74a01c80288c