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Analysis

  • max time kernel
    297s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    07/01/2024, 22:26

General

  • Target

    b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe

  • Size

    677KB

  • MD5

    29c90df93010a44329059fe0300d92da

  • SHA1

    2b5da6fe0256f1f27e86d955b4c53177e91d85dd

  • SHA256

    b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8

  • SHA512

    a1866d160ac263c8d4a9380469a4cb0ecf6d86621c6cfef43b1eade133be3bf9e5fb0d67f63f13af72faca11af52cf06ec464378fed7c444b5553d00950bf128

  • SSDEEP

    12288:oaTA97Ia6XHj9DF5nX7p/+haG3S/jktz0H1PiqvYWfXdQSD+YbaUcDrh:rcx+XHj5brpm0G3QjwIpi+YWfXdZK8b

Malware Config

Extracted

Family

djvu

C2

http://zexeq.com/test1/get.php

Attributes
  • extension

    .cdqw

  • offline_id

    mMsRxMUuXypapZbGOAfxD9pczHmW8zVRP7Pgjwt1

  • payload_url

    http://brusuax.com/dl/build2.exe

    http://zexeq.com/files/1/build3.exe

  • ransomnote

    ATTENTION! Don't worry, you can return all your files! All your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees you have? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information. You can get and look video overview decrypt tool: https://we.tl/t-99MNqXMrdS Price of private key and decrypt software is $1999. Discount 50% available if you contact us first 72 hours, that's price for you is $999. Please note that you'll never restore your data without payment. Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours. To get this software you need write on our e-mail: [email protected] Reserve e-mail address to contact us: [email protected] Your personal ID: 0840ASdw

rsa_pubkey.plain

Signatures

  • Detect Vidar Stealer 7 IoCs
  • Detected Djvu ransomware 14 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Downloads MZ/PE file
  • Executes dropped EXE 12 IoCs
  • Loads dropped DLL 8 IoCs
  • Modifies file permissions 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Looks up external IP address via web service 3 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of SetThreadContext 8 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Creates scheduled task(s) 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Modifies system certificate store 2 TTPs 8 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe
    "C:\Users\Admin\AppData\Local\Temp\b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2248
    • C:\Users\Admin\AppData\Local\Temp\b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe
      "C:\Users\Admin\AppData\Local\Temp\b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1536
      • C:\Users\Admin\AppData\Local\Temp\b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe
        "C:\Users\Admin\AppData\Local\Temp\b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2980
        • C:\Users\Admin\AppData\Local\Temp\b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe
          "C:\Users\Admin\AppData\Local\Temp\b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Loads dropped DLL
          • Modifies system certificate store
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:2192
          • C:\Users\Admin\AppData\Local\b94e5408-a531-4f4d-a889-83ee97b39e19\build2.exe
            "C:\Users\Admin\AppData\Local\b94e5408-a531-4f4d-a889-83ee97b39e19\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:2300
            • C:\Users\Admin\AppData\Local\b94e5408-a531-4f4d-a889-83ee97b39e19\build2.exe
              "C:\Users\Admin\AppData\Local\b94e5408-a531-4f4d-a889-83ee97b39e19\build2.exe"
              6⤵
              • Executes dropped EXE
              • Modifies system certificate store
              • Suspicious use of WriteProcessMemory
              PID:1132
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 1132 -s 1400
                7⤵
                • Loads dropped DLL
                • Program crash
                PID:1272
          • C:\Users\Admin\AppData\Local\b94e5408-a531-4f4d-a889-83ee97b39e19\build3.exe
            "C:\Users\Admin\AppData\Local\b94e5408-a531-4f4d-a889-83ee97b39e19\build3.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:832
            • C:\Users\Admin\AppData\Local\b94e5408-a531-4f4d-a889-83ee97b39e19\build3.exe
              "C:\Users\Admin\AppData\Local\b94e5408-a531-4f4d-a889-83ee97b39e19\build3.exe"
              6⤵
              • Executes dropped EXE
              • Suspicious use of WriteProcessMemory
              PID:2916
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\e8e6a898-a6fd-4e67-8297-289c7af95544" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:1084
  • C:\Windows\SysWOW64\schtasks.exe
    /C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"
    1⤵
    • Creates scheduled task(s)
    PID:968
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {4B599FB2-C137-4EDF-9E50-9C9C809A7E25} S-1-5-21-3470981204-343661084-3367201002-1000:GLTGRJAG\Admin:Interactive:[1]
    1⤵
      PID:2720
      • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        2⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        PID:2728
        • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
          C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
          3⤵
          • Executes dropped EXE
          PID:2768
          • C:\Windows\SysWOW64\schtasks.exe
            /C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"
            4⤵
            • Creates scheduled task(s)
            PID:2036
      • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        2⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        PID:1464
        • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
          C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
          3⤵
          • Executes dropped EXE
          PID:1864
      • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        2⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        PID:1048
        • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
          C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
          3⤵
          • Executes dropped EXE
          PID:2072
      • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        2⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        PID:2740
        • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
          C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
          3⤵
          • Executes dropped EXE
          PID:2664

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

      Filesize

      1KB

      MD5

      ec76a0e5c12e057fd09953aa4c89db48

      SHA1

      965160b7cd1a48a58c62cb27663ee108efd7b0fb

      SHA256

      a12c74241d1df0feed69578c08a1ff4cc4680847e02ce3832ccd026f1393541e

      SHA512

      74a2ad02e7bf98311bfdc2b95c3661b75ba66f29f2f34fe9b4ee230e9a4c7068c825fef4ee0f9aaabf3a1bbd49c43caccef2142c61cef10ff50170b0437828dd

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\4748633DC5731827D4B432DBAC7A3ECE

      Filesize

      854B

      MD5

      8d1040b12a663ca4ec7277cfc1ce44f0

      SHA1

      b27fd6bbde79ebdaee158211a71493e21838756b

      SHA256

      3086094d4198a5bbd12938b0d2d5f696c4dfc77e1eae820added346a59aa8727

      SHA512

      610c72970856ef7a316152253f7025ac11635078f1aea7b84641715813792374d2447b1002f1967d62b24073ee291b3e4f3da777b71216a30488a5d7b6103ac1

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

      Filesize

      65KB

      MD5

      ac05d27423a85adc1622c714f2cb6184

      SHA1

      b0fe2b1abddb97837ea0195be70ab2ff14d43198

      SHA256

      c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

      SHA512

      6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\F0ACCF77CDCBFF39F6191887F6D2D357

      Filesize

      1KB

      MD5

      a266bb7dcc38a562631361bbf61dd11b

      SHA1

      3b1efd3a66ea28b16697394703a72ca340a05bd5

      SHA256

      df545bf919a2439c36983b54cdfc903dfa4f37d3996d8d84b4c31eec6f3c163e

      SHA512

      0da8ef4f8f6ed3d16d2bc8eb816b9e6e1345dfe2d91160196c47e6149a1d6aedaafadcefd66acdea7f72dcf0832770192ceac15b0c559c4ccc2c0e5581d5aefc

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

      Filesize

      410B

      MD5

      d2ba178da8c329dad32445f41a331c23

      SHA1

      759e91b265abf8344091041dcf03e74ef7e118d8

      SHA256

      3b15b9b64c475a861979a7d81c641955d8f26645273f28be05988c25c1e29cf3

      SHA512

      3b657a70e4df89365949fe606c73d5c16b755e4a86ed8ba20fe764cf98a47aad3d5b49c7a40c8cd79fbc04b440f4a7c30d17ef22706900be9a82ac9529f43576

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\4748633DC5731827D4B432DBAC7A3ECE

      Filesize

      188B

      MD5

      3f566a27e36581d0fb04f5c844c7c168

      SHA1

      d82c137bb7f95ed26fb1f739aef80b6282e10acc

      SHA256

      b005ba24c99da4816178dbaa7970d968739f1b41a304d7d828e4f08aa95a1abf

      SHA512

      d36dbf346db3cfa945c08ecbb9cfb38676eaf880b525f0cfab2fdb20de23cd52c6808c60eef49271188a61aa928608938194d4d25f41f94ab18427765bfe444f

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

      Filesize

      344B

      MD5

      d92a50809e805bb74ec8b2d2eec6e6f0

      SHA1

      12a189587807d70a6b96ecc336d3611ce74af808

      SHA256

      edeacd7f898bb81835f2bd7f6530e3b726a3a6a67ab316eefb4234168c107c1d

      SHA512

      eba3963e78c9acee4ec700831249f2c12de93b9ff61905675ca36a695a9b932fa43cc9e531b7caaa6604a22a38e6a2c87259b5f5a652b3af14bbd5be3996720a

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

      Filesize

      344B

      MD5

      abca3cd037a2d2074322183bf58651b5

      SHA1

      a6b7b21384698b6b10f827fc14d95f6f943ac6ae

      SHA256

      ffce4d3c234e22d6cf4cc3463c6e661d5d0413fe445214d24a2ba50fa9b05c67

      SHA512

      9170dea1cdc82a29b1e3e819b777e66113593262900add13a9c43e923b3265414e372afd1bbb4285f3d4fbb271f87204ec2d6d8185abb414b246a5abcc2f465f

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\F0ACCF77CDCBFF39F6191887F6D2D357

      Filesize

      242B

      MD5

      10990641e33f91956f385a445d32d2e7

      SHA1

      2a84cd34854aff58c6a9c3580e678ddde0017933

      SHA256

      a70176289c4bd855c1151a04175f50bd9907e5f513483d2bd85af73eef2dc367

      SHA512

      95be2394c79b2428f76a767fe9564c79ba1ae7938ea63ed5cf8e53ca564a8bb83140b431ca1f5e5bb432f929ca2044320b4979e1745890dc4ad349825acabc10

    • C:\Users\Admin\AppData\Local\Temp\Tar78E8.tmp

      Filesize

      171KB

      MD5

      9c0c641c06238516f27941aa1166d427

      SHA1

      64cd549fb8cf014fcd9312aa7a5b023847b6c977

      SHA256

      4276af3669a141a59388bc56a87f6614d9a9bdddf560636c264219a7eb11256f

      SHA512

      936ed0c0b0a7ff8e606b1cc4175a1f9b3699748ccbba1c3aff96203033d2e9edabf090e5148370df42fbfc4e31d7229493706ff24f19ff42ff7bef74a6baad06

    • C:\Users\Admin\AppData\Local\b94e5408-a531-4f4d-a889-83ee97b39e19\build2.exe

      Filesize

      247KB

      MD5

      1f7efac73d987dae200e36922267d8c6

      SHA1

      a1bb90007d2e00025953c13ca742d767ebcce27e

      SHA256

      5719504e2f4e976c8ce6fbfda399b80273e783ff05f61dfd1f1bd4737f0bde8a

      SHA512

      75ef83a7e079e553a98e60dd73a9eebbaa793ced7bbd8a712a8f7f363349456d12b3766481d03d00f376cf31c4697afd934eb9b29a2e70727a70a9f463d03bed

    • C:\Users\Admin\AppData\Local\b94e5408-a531-4f4d-a889-83ee97b39e19\build3.exe

      Filesize

      92KB

      MD5

      4b3fc3105731c7ff3a7e3966416912a2

      SHA1

      0e792bf25e8795158074fa6bd2ee87ad16675124

      SHA256

      c0f698bcc4324958848de5d8e1b1bdaed5e01632d8c827a5a95356eb04a2c443

      SHA512

      6ed5ee0139d9d9a676232a6c5d6e9a8528f880025a11fccf8a1a32a999ae5fac41f993c384fabec788e4e47da714d67f1def0348da6b0f4392e7fc7ff1098c28

    • C:\Users\Admin\AppData\Local\e8e6a898-a6fd-4e67-8297-289c7af95544\b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe

      Filesize

      677KB

      MD5

      29c90df93010a44329059fe0300d92da

      SHA1

      2b5da6fe0256f1f27e86d955b4c53177e91d85dd

      SHA256

      b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8

      SHA512

      a1866d160ac263c8d4a9380469a4cb0ecf6d86621c6cfef43b1eade133be3bf9e5fb0d67f63f13af72faca11af52cf06ec464378fed7c444b5553d00950bf128

    • \Users\Admin\AppData\Local\b94e5408-a531-4f4d-a889-83ee97b39e19\build3.exe

      Filesize

      299KB

      MD5

      41b883a061c95e9b9cb17d4ca50de770

      SHA1

      1daf96ec21d53d9a4699cea9b4db08cda6fbb5ad

      SHA256

      fef2c8ca07c500e416fd7700a381c39899ee26ce1119f62e7c65cf922ce8b408

      SHA512

      cdd1bb3a36182575cd715a52815765161eeaa3849e72c1c2a9a4e84cc43af9f8ec4997e642702bb3de41f162d2e8fd8717f6f8302bba5306821ee4d155626319

    • memory/832-124-0x00000000002A0000-0x00000000002A4000-memory.dmp

      Filesize

      16KB

    • memory/832-123-0x00000000008A2000-0x00000000008B3000-memory.dmp

      Filesize

      68KB

    • memory/1048-320-0x0000000000972000-0x0000000000982000-memory.dmp

      Filesize

      64KB

    • memory/1132-165-0x0000000000400000-0x000000000063D000-memory.dmp

      Filesize

      2.2MB

    • memory/1132-266-0x0000000000400000-0x000000000063D000-memory.dmp

      Filesize

      2.2MB

    • memory/1132-100-0x0000000000400000-0x000000000063D000-memory.dmp

      Filesize

      2.2MB

    • memory/1132-104-0x0000000000400000-0x000000000063D000-memory.dmp

      Filesize

      2.2MB

    • memory/1132-103-0x0000000000400000-0x000000000063D000-memory.dmp

      Filesize

      2.2MB

    • memory/1132-230-0x0000000000400000-0x000000000063D000-memory.dmp

      Filesize

      2.2MB

    • memory/1464-292-0x0000000000990000-0x0000000000A90000-memory.dmp

      Filesize

      1024KB

    • memory/1536-1-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

      Filesize

      4KB

    • memory/1536-7-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1536-45-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1536-3-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1536-8-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2192-75-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2192-70-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2192-54-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2192-79-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2192-77-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2192-78-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2192-53-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2192-115-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2192-71-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2248-0-0x0000000000330000-0x00000000003C1000-memory.dmp

      Filesize

      580KB

    • memory/2248-6-0x0000000000330000-0x00000000003C1000-memory.dmp

      Filesize

      580KB

    • memory/2248-5-0x0000000002170000-0x000000000228B000-memory.dmp

      Filesize

      1.1MB

    • memory/2300-98-0x00000000001B0000-0x00000000001DA000-memory.dmp

      Filesize

      168KB

    • memory/2300-97-0x00000000002F0000-0x00000000003F0000-memory.dmp

      Filesize

      1024KB

    • memory/2728-265-0x0000000000912000-0x0000000000922000-memory.dmp

      Filesize

      64KB

    • memory/2740-348-0x0000000000A02000-0x0000000000A12000-memory.dmp

      Filesize

      64KB

    • memory/2916-126-0x0000000000400000-0x0000000000406000-memory.dmp

      Filesize

      24KB

    • memory/2916-128-0x0000000000400000-0x0000000000406000-memory.dmp

      Filesize

      24KB

    • memory/2916-121-0x0000000000400000-0x0000000000406000-memory.dmp

      Filesize

      24KB

    • memory/2980-49-0x00000000020F0000-0x0000000002181000-memory.dmp

      Filesize

      580KB

    • memory/2980-47-0x00000000020F0000-0x0000000002181000-memory.dmp

      Filesize

      580KB