Analysis

  • max time kernel
    117s
  • max time network
    125s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    15/01/2024, 08:50

General

  • Target

    5ca3f45557b4e9c5b9c2ace9ae1a4752.exe

  • Size

    729KB

  • MD5

    5ca3f45557b4e9c5b9c2ace9ae1a4752

  • SHA1

    8497aae4a8f26c94bdbd9478db8fd0a5479e81d2

  • SHA256

    66d68d69e8d3911c571276d89698732c17f35544c5884d548c9260adf01b9839

  • SHA512

    723171a94fdbbdb3f921ad8d6e63782b8fcebe3db88e1e6557c8ab2c8e897a90c6a673b32a64c2a32f81b472ff32483a7ac64e40c63f940c784cb423bac6b563

  • SSDEEP

    12288:dMUbKO9Y0irApn/w9tiKFJWP3vxSBh3XzwphP+2FTbvIjK8xf2U:mUFirA4n7aP3e3222FTrIjK8

Malware Config

Extracted

Family

djvu

C2

http://astdg.top/fhsgtsspen6/get.php

Attributes
  • extension

    .nooa

  • offline_id

    PLtnD1U6oAmgxgJ2nJik1mY9SwUQg07CiN0zSet1

  • payload_url

    http://securebiz.org/dl/build2.exe

    http://astdg.top/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-CnI3tI6Ktv Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. 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: 0322gDrgo

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 13 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • 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 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies system certificate store 2 TTPs 5 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\5ca3f45557b4e9c5b9c2ace9ae1a4752.exe
    "C:\Users\Admin\AppData\Local\Temp\5ca3f45557b4e9c5b9c2ace9ae1a4752.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2880
    • C:\Users\Admin\AppData\Local\Temp\5ca3f45557b4e9c5b9c2ace9ae1a4752.exe
      "C:\Users\Admin\AppData\Local\Temp\5ca3f45557b4e9c5b9c2ace9ae1a4752.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2960
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\7eee19ef-7e0f-4ddf-aa5e-8dfe7a526ad8" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2800
      • C:\Users\Admin\AppData\Local\Temp\5ca3f45557b4e9c5b9c2ace9ae1a4752.exe
        "C:\Users\Admin\AppData\Local\Temp\5ca3f45557b4e9c5b9c2ace9ae1a4752.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2672
        • C:\Users\Admin\AppData\Local\Temp\5ca3f45557b4e9c5b9c2ace9ae1a4752.exe
          "C:\Users\Admin\AppData\Local\Temp\5ca3f45557b4e9c5b9c2ace9ae1a4752.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Modifies system certificate store
          • Suspicious behavior: EnumeratesProcesses
          PID:2524

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

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

          Filesize

          1KB

          MD5

          b7470a9aa569b259d4c2bb3b80ae3aa3

          SHA1

          093290296b7f1e402ef96e4b33a88f064aa401eb

          SHA256

          ee8aeed77dd9f1631fa75845214d75bfe04951a61892410ee369035e13fd14c6

          SHA512

          4da3fc09260692f159c37b068664852931b712c8173de5e4b294799ac33ecf179055aaeb016fd0afad88cbfc50a571c4c88033dca56a573431af7462ea7979be

        • 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\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

          Filesize

          724B

          MD5

          8202a1cd02e7d69597995cabbe881a12

          SHA1

          8858d9d934b7aa9330ee73de6c476acf19929ff6

          SHA256

          58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5

          SHA512

          97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9

        • 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

          02f4eb0e3ec3d0578df771754e747270

          SHA1

          015036c597ca23e9f5e8602c28482b335ec2cf88

          SHA256

          50b8b8455a5af7eebbec9ba5dd429a8d2befb0157111a90fd1f9c96b8b4c583a

          SHA512

          6535b9dc7e2f55223ce5ee793bb43bb2b1e816a80dfccb347fd31fe8fc7ac32835084a66a50a9483e8b19b936602e46cb6009bc4a5028d46a7c8be7791bf8e57

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

          Filesize

          344B

          MD5

          af9291cfad5ae5a54e8b919534704031

          SHA1

          2275f912bb7c9f9cfb43b4660bc4e83909caf7ee

          SHA256

          41c0ea7f87d41f2a4e7838bebbaa6fdb6ffcf63ed94d09288ea732e6e7fcf3ab

          SHA512

          a0fea97c708b81dfd9fa184d3fd9ead4357cf89acac2616fef0297408a37640c3831c37450fb26aed189c555e8b182fae10a342984626df57b7b96920e6ff21a

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

          Filesize

          392B

          MD5

          d96062733250f7c17cc4bb9b3230eaaf

          SHA1

          d9048227c8e732891c7cb53c99e8a18e6c84339c

          SHA256

          810f917d3af7e1556fa27857d57e8b6f6dd3c1c3317b6cf2a202f72c2ed0a754

          SHA512

          6377d16a3fc146107e46f7539c500c69f94fae772e569c11aea15962b9ad69d99f309750c9be2e9acbe7f03f7b63c21a0b66d286e146af51924bda3f88bf23b4

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

          Filesize

          242B

          MD5

          5565be3b9bec325b93a67cf022bf61e6

          SHA1

          beacf7ab3bfc298e08b39cc224c0fe7f0b39282c

          SHA256

          d896cd84a73e972cdb07d1cc630803a59ec5f2c90d0774d053ecc089d5d76db5

          SHA512

          5df481baad27741b67793f11a197a72b3e16ce223423f0d27276b668bc8c25f61d7e799870770149c6bdccb6e72efe7d9d58c582adc32efbc4b708b47ac1f9f9

        • C:\Users\Admin\AppData\Local\7eee19ef-7e0f-4ddf-aa5e-8dfe7a526ad8\5ca3f45557b4e9c5b9c2ace9ae1a4752.exe

          Filesize

          370KB

          MD5

          01856db7e82dd0998c6e7a9b8040cec2

          SHA1

          41f43d6271d67470c5b77e0acc86fb4df9f91a9b

          SHA256

          cceb86228202eda0e79236d66031ae9cb212e3df5bf3d3242369d0b873935931

          SHA512

          581a6fa3ae8ceca0847e016c54c7895bc9a03025214b2a1d94bee9a9ec119e02f1160f74d3976c697ac34825280e484a05faf3523650ba49d7b5aaee9b2a6243

        • C:\Users\Admin\AppData\Local\Temp\Tar479C.tmp

          Filesize

          171KB

          MD5

          9c0c641c06238516f27941aa1166d427

          SHA1

          64cd549fb8cf014fcd9312aa7a5b023847b6c977

          SHA256

          4276af3669a141a59388bc56a87f6614d9a9bdddf560636c264219a7eb11256f

          SHA512

          936ed0c0b0a7ff8e606b1cc4175a1f9b3699748ccbba1c3aff96203033d2e9edabf090e5148370df42fbfc4e31d7229493706ff24f19ff42ff7bef74a6baad06

        • memory/2524-71-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2524-75-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2524-54-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2524-72-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2524-77-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2524-70-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2524-76-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2524-73-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2672-53-0x0000000000220000-0x00000000002B2000-memory.dmp

          Filesize

          584KB

        • memory/2672-47-0x0000000000220000-0x00000000002B2000-memory.dmp

          Filesize

          584KB

        • memory/2672-45-0x0000000000220000-0x00000000002B2000-memory.dmp

          Filesize

          584KB

        • memory/2880-0-0x0000000000330000-0x00000000003C2000-memory.dmp

          Filesize

          584KB

        • memory/2880-2-0x00000000045F0000-0x000000000470B000-memory.dmp

          Filesize

          1.1MB

        • memory/2880-1-0x0000000000330000-0x00000000003C2000-memory.dmp

          Filesize

          584KB

        • memory/2960-44-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2960-3-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

          Filesize

          4KB

        • memory/2960-7-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2960-8-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2960-5-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB