Analysis

  • max time kernel
    142s
  • max time network
    123s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    26/01/2024, 03:24

General

  • Target

    76423c0da5d1aca1e737da17a2319250.exe

  • Size

    758KB

  • MD5

    76423c0da5d1aca1e737da17a2319250

  • SHA1

    283a5e8ca8c196920b80d6353a1789b205992a8e

  • SHA256

    a11ffacad8ded4ac1f3e634d9cdcdda320d075cc6b2e71819958399ddd34b15c

  • SHA512

    a0b2fac294e914f1a0c17b4e60daa997d4f6fa5ecf527774ba6c9277ffb09e6510745c9a68cdf044cca62bd3d84944d4c50f641c4360b752e7bdafa536c3a49f

  • SSDEEP

    12288:yYyNIBTERFiRGWo/V4l8Jv2kpXCVFiialb09S4Ykp6ZuyBhQxXARwoOtnzM:yIBTJGr4029XVaZ09Nhp6ZuyBexX2Anz

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 15 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).

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\76423c0da5d1aca1e737da17a2319250.exe
    "C:\Users\Admin\AppData\Local\Temp\76423c0da5d1aca1e737da17a2319250.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2044
    • C:\Users\Admin\AppData\Local\Temp\76423c0da5d1aca1e737da17a2319250.exe
      "C:\Users\Admin\AppData\Local\Temp\76423c0da5d1aca1e737da17a2319250.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1996
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\df82dcc7-f577-4b31-8abe-ddcbdd52f63f" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2780
      • C:\Users\Admin\AppData\Local\Temp\76423c0da5d1aca1e737da17a2319250.exe
        "C:\Users\Admin\AppData\Local\Temp\76423c0da5d1aca1e737da17a2319250.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2768
        • C:\Users\Admin\AppData\Local\Temp\76423c0da5d1aca1e737da17a2319250.exe
          "C:\Users\Admin\AppData\Local\Temp\76423c0da5d1aca1e737da17a2319250.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:2760

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

          8daed5fecd6b7116eb16ea66eda552e0

          SHA1

          bb2149a2541f11dc4da8df7f4579dd65c341ce8b

          SHA256

          076f87f4acbece273de34b83b72bb1a4cf38135f1cf27c49722ce8dfe5c60d71

          SHA512

          eeb7e9bea6db27a316e09dd4cdaae0ccbb3d895e56dad92f54e59a6bb13e450fb6bfb09972f7a23aadba82960af004a7b72852d477b14b80d9d5a68dd6859fc7

        • 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\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

          Filesize

          410B

          MD5

          67d0369a815beca831fd74b114db1c33

          SHA1

          c6d4035209012ff2b27632063bbabcb2f24dbf53

          SHA256

          e6ba88457bfe9c0a8304c46a25ea0d9e8c848ef254edad186a182bcb08920036

          SHA512

          43ff54226703401a23826bbe2f419a409754e4bb3b049d2a972743a7189c3aa2bec42916a10e1c2d0d03fa3b285fd366831d1a6fc20561ddfc92b81751e18ce7

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

          Filesize

          344B

          MD5

          b38139fbe38044e39021aa36dbd0eefd

          SHA1

          2b8edbacf551ed6641b04a6d6bec6befbfb8dd68

          SHA256

          a76e802672679db3292d69bb8d7e4e34b498775899b6533b251c18be94f94d58

          SHA512

          9dbe101e01a40b382df21d666e37bdcc20b4fb6258dfc292c71f6734f17b61d2a23c1df487a2d0034628e3533f08d49a2e93a6cab14c8b08f60758d3539ab82f

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

          Filesize

          392B

          MD5

          bef4ad6a5fddf1593f203d22f84e6071

          SHA1

          414b894ad835fce6b9828b352e4d31457155400b

          SHA256

          bd01c32bfd2226519a45c9c0dbcae7f15336d9e674f7e011257965a5aec40796

          SHA512

          d5008ad4bb8a1b76ac39fa5fd8eaaf3a5700d0cb294e9fbc29a6832b67e56f61d5787fffaa4c9679d1117584d04d62e83585339ec2b4bce6723390b2e31949c7

        • C:\Users\Admin\AppData\Local\Temp\Cab7272.tmp

          Filesize

          65KB

          MD5

          ac05d27423a85adc1622c714f2cb6184

          SHA1

          b0fe2b1abddb97837ea0195be70ab2ff14d43198

          SHA256

          c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

          SHA512

          6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

        • C:\Users\Admin\AppData\Local\df82dcc7-f577-4b31-8abe-ddcbdd52f63f\76423c0da5d1aca1e737da17a2319250.exe

          Filesize

          758KB

          MD5

          76423c0da5d1aca1e737da17a2319250

          SHA1

          283a5e8ca8c196920b80d6353a1789b205992a8e

          SHA256

          a11ffacad8ded4ac1f3e634d9cdcdda320d075cc6b2e71819958399ddd34b15c

          SHA512

          a0b2fac294e914f1a0c17b4e60daa997d4f6fa5ecf527774ba6c9277ffb09e6510745c9a68cdf044cca62bd3d84944d4c50f641c4360b752e7bdafa536c3a49f

        • memory/1996-9-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1996-8-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1996-2-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

          Filesize

          4KB

        • memory/1996-29-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1996-4-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2044-7-0x0000000004470000-0x0000000004502000-memory.dmp

          Filesize

          584KB

        • memory/2044-6-0x0000000004510000-0x000000000462B000-memory.dmp

          Filesize

          1.1MB

        • memory/2044-0-0x0000000004470000-0x0000000004502000-memory.dmp

          Filesize

          584KB

        • memory/2044-1-0x0000000004470000-0x0000000004502000-memory.dmp

          Filesize

          584KB

        • memory/2760-39-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2760-38-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2760-52-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2760-53-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2760-54-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2760-57-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2760-60-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2760-59-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2760-61-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2760-62-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2768-37-0x0000000002D00000-0x0000000002D92000-memory.dmp

          Filesize

          584KB

        • memory/2768-32-0x0000000002D00000-0x0000000002D92000-memory.dmp

          Filesize

          584KB

        • memory/2768-30-0x0000000002D00000-0x0000000002D92000-memory.dmp

          Filesize

          584KB