Analysis

  • max time kernel
    145s
  • max time network
    145s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26/01/2024, 09:49

General

  • Target

    770875a906b4931c20fc1abf90bd3728.exe

  • Size

    758KB

  • MD5

    770875a906b4931c20fc1abf90bd3728

  • SHA1

    ee3a2a7399459c55de025b9a20a1aef3e770cb83

  • SHA256

    187329e42948ef198658234eed2b95a769decf507415a6e4acc1a1eb4429e1db

  • SHA512

    4aad8881caa4d33bc018291d22d9cf7993f5eeade1e6fc7f19995e2dbfa4af4fe9e585a5a18d382fc07798a53c0aa3a8ca8e87b7443bf01548adee92266fd974

  • SSDEEP

    12288:ONr496jPTGSg8D+R6u0UbwvrI7TsDFHM0noXUzVFuAWE5yWzuyJpypD9ARwoOc:OFu6jPTGSLPvM7YRsliFuPiKD925

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\770875a906b4931c20fc1abf90bd3728.exe
    "C:\Users\Admin\AppData\Local\Temp\770875a906b4931c20fc1abf90bd3728.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3040
    • C:\Users\Admin\AppData\Local\Temp\770875a906b4931c20fc1abf90bd3728.exe
      "C:\Users\Admin\AppData\Local\Temp\770875a906b4931c20fc1abf90bd3728.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1212
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\c236505a-fe42-45d2-b7b6-a6d0d3e3a648" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:4612
      • C:\Users\Admin\AppData\Local\Temp\770875a906b4931c20fc1abf90bd3728.exe
        "C:\Users\Admin\AppData\Local\Temp\770875a906b4931c20fc1abf90bd3728.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4068
        • C:\Users\Admin\AppData\Local\Temp\770875a906b4931c20fc1abf90bd3728.exe
          "C:\Users\Admin\AppData\Local\Temp\770875a906b4931c20fc1abf90bd3728.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:4588

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

          73ce21ff1fb2989f6350ace9274ae9b5

          SHA1

          7db6c387eb8351f3e8e361d10224711c3477821e

          SHA256

          d7005273bab949c42fcc73eac7820c4c5f08df1e9095020cdb0e17fc9e282d50

          SHA512

          a43767a55a559a8bf51d5dcb9bc378167f63e15f571b6be35903048570d036fed2a3f6a37c91f469ee9808d245cdd875b9dad38556e6bf97258a82c7071aeab3

        • 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

          74adee8a8bf071e721106cd4008f1623

          SHA1

          0a92a27b1fcf107c46c71564d617c946f426862c

          SHA256

          f0fdcc083da31b13b39252e150b00f5206ec7ab389056c378ce9981845027d39

          SHA512

          937cc6650def3a5162d88976a20ddd1ca713398da2f11ff5e568b333899c56a93555b030c45e5df4a29940fa2f6fca6d19cb3395ac68e5ccb2d986c7e750b5df

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

          Filesize

          392B

          MD5

          b3a2356cbd5ce42914c79bc4a111a750

          SHA1

          6c9ac4a2daea1b306f776924ef9b52963e1ade36

          SHA256

          ae2731e9ee452f4c5345d8ac23c91782f215d55bbb4881da3fa15e4fd5ca7e3b

          SHA512

          eb6b4f9ff2810408b44266879e7fd0dba287699f7e43c531bb12097fff33955c93efa483b11e7254e43e949942dff697cbd951b128b568a4d5cc60a359578b84

        • C:\Users\Admin\AppData\Local\c236505a-fe42-45d2-b7b6-a6d0d3e3a648\770875a906b4931c20fc1abf90bd3728.exe

          Filesize

          758KB

          MD5

          770875a906b4931c20fc1abf90bd3728

          SHA1

          ee3a2a7399459c55de025b9a20a1aef3e770cb83

          SHA256

          187329e42948ef198658234eed2b95a769decf507415a6e4acc1a1eb4429e1db

          SHA512

          4aad8881caa4d33bc018291d22d9cf7993f5eeade1e6fc7f19995e2dbfa4af4fe9e585a5a18d382fc07798a53c0aa3a8ca8e87b7443bf01548adee92266fd974

        • memory/1212-4-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1212-16-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1212-6-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1212-3-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1212-5-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3040-1-0x0000000004A40000-0x0000000004ADA000-memory.dmp

          Filesize

          616KB

        • memory/3040-2-0x0000000004B30000-0x0000000004C4B000-memory.dmp

          Filesize

          1.1MB

        • memory/4068-19-0x0000000004830000-0x00000000048CB000-memory.dmp

          Filesize

          620KB

        • memory/4588-20-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4588-22-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4588-21-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4588-28-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4588-27-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4588-29-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4588-31-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4588-33-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4588-34-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4588-35-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4588-37-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB