Analysis

  • max time kernel
    146s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27/01/2024, 06:19

General

  • Target

    797e3e1110e0486621a7b615ef234f1f.exe

  • Size

    723KB

  • MD5

    797e3e1110e0486621a7b615ef234f1f

  • SHA1

    a89750f80cdb397fe9772544e6ddc3455efc15b0

  • SHA256

    bd12c49f8042d22bd417a8012a9d1dd5c086a5b0244d4eac163c2f9b730b8eec

  • SHA512

    c0c20b60130a6fc2cf822e50feb8ea2132a9ff2bbc1b11377db41b2df36aeffa5b262da5680fa8759cb472173e9e60c5ab544226afe1971123c7eb143b1e0266

  • SSDEEP

    12288:Nq2H/Pr6frpwp4qGwIWyr1FS6TvNK5LODnt8uEPgVpqb+EyyzCOUdEuyKBURh:TfefldtS6TlgOyRb+EyaChEuyK0

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 17 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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 4 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\797e3e1110e0486621a7b615ef234f1f.exe
    "C:\Users\Admin\AppData\Local\Temp\797e3e1110e0486621a7b615ef234f1f.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4976
    • C:\Users\Admin\AppData\Local\Temp\797e3e1110e0486621a7b615ef234f1f.exe
      "C:\Users\Admin\AppData\Local\Temp\797e3e1110e0486621a7b615ef234f1f.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:316
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\06fe5c60-4eba-4c3c-9999-b0a39ed2602e" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:8
      • C:\Users\Admin\AppData\Local\Temp\797e3e1110e0486621a7b615ef234f1f.exe
        "C:\Users\Admin\AppData\Local\Temp\797e3e1110e0486621a7b615ef234f1f.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3368
        • C:\Users\Admin\AppData\Local\Temp\797e3e1110e0486621a7b615ef234f1f.exe
          "C:\Users\Admin\AppData\Local\Temp\797e3e1110e0486621a7b615ef234f1f.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:3420

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

          117581c8a2ff4fce10d77d2f81dd0cdc

          SHA1

          a0fbeeef3c720485767906ddf3d699f78bd3a692

          SHA256

          14924e43f9d37b1bfca5c3d878e9ad833b26ce047840565801eb2aa2257770e2

          SHA512

          4230d5299fb961cb1d2ea3bd971e3df2cc3bdd10ff4331e672bfb4ab49a68f757df0d433dc0cfc8f07a6b6e0b51166cb571eefa93eb9a41f98197fcce5eec9a8

        • 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

          3b9de6831560601ff09ec87729aa712a

          SHA1

          a98a1f7027d0a406f7ee581ceea91b22c985bfb7

          SHA256

          c5e56fcf79f9d1581c6a54fe1ed1e2e97ea927c9a4fe5ada14e770a5de5adf5c

          SHA512

          e68141cd7de91a50c67749317614ae183ae5e6826078f5b01ede566e2f03461693043435f686a65c6e2d1cc5044e2ab7e617e069d801ca14384146c978c6282c

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

          Filesize

          392B

          MD5

          a1c28371391eddea308574b3037df848

          SHA1

          9735ace763cc213a153040ecbe0d3d6bd6f40eb1

          SHA256

          ab898305fce434823116aebdd24261c65df599b15c53fab40730714d734a9837

          SHA512

          9c64ecec2f32dd7d578c03d7f1140752d2b25ab2d8e01030f73484c812ca21eba068777aa363b933fdd5b06b0a22faaeaa694ca1530c15f7b334aeadf75ff6bf

        • C:\Users\Admin\AppData\Local\06fe5c60-4eba-4c3c-9999-b0a39ed2602e\797e3e1110e0486621a7b615ef234f1f.exe

          Filesize

          607KB

          MD5

          e5f0045b8e7132ba6749252cf90a0625

          SHA1

          1cf640edba0758f946bddcf93a97f7ef2da0c18a

          SHA256

          d7413120af2e9d7e749aac63681d5ca58846e759e830854fe646039bf317b4d3

          SHA512

          6bdb4f213c3eaf9d27d204a10f22d052d4d4a7711d1d4898f4b740e8fd4fd2fd29b88361734004539e7242d48cce17e35d70ec017551d0c04ca8d5046a3da96e

        • memory/316-5-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/316-3-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/316-18-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/316-6-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/316-4-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3368-20-0x0000000004910000-0x00000000049AF000-memory.dmp

          Filesize

          636KB

        • memory/3420-22-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3420-24-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3420-23-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3420-31-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3420-32-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3420-33-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3420-35-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3420-37-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3420-38-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3420-39-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3420-41-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4976-1-0x0000000004A60000-0x0000000004AFB000-memory.dmp

          Filesize

          620KB

        • memory/4976-2-0x0000000004B60000-0x0000000004C7B000-memory.dmp

          Filesize

          1.1MB