Analysis

  • max time kernel
    143s
  • max time network
    125s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240426-en
  • resource tags

    arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    21-05-2024 15:19

General

  • Target

    09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe

  • Size

    708KB

  • MD5

    afc2780d65fe1e67d01ae629cd2f1e0f

  • SHA1

    cabfc8608feca588c98e30476e79b9df85171c6f

  • SHA256

    09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319

  • SHA512

    390b4b8a11c099d512e2388c408492190311b2daaefc063c9279b6cc3f3a96ec3b71a1905556188439b42d29d2bde40662241a4ba08a456e5c72af3307f915b5

  • SSDEEP

    12288:SbYZF34fEdgCZ/Qp9bzIWDvhcC38g1AjGjJp4C0G6K98:S2F4EdgCZ/clbcCN6m74CS

Malware Config

Extracted

Family

djvu

C2

http://cajgtus.com/test2/get.php

Attributes
  • extension

    .vehu

  • offline_id

    EGfa5svnSGFJka7LZBQoqff0QtO1IpTauoDvGvt1

  • payload_url

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

    http://cajgtus.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. Do not ask assistants from youtube and recovery data sites for help in recovering your data. They can use your free decryption quota and scam you. Our contact is emails in this text document only. You can get and look video overview decrypt tool: https://wetransfer.com/downloads/33b490a613f49fa190924f199d2c079e20240512191214/caaf73 Price of private key and decrypt software is $999. Discount 50% available if you contact us first 72 hours, that's price for you is $499. 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: 0872PsawqS

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 4 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe
    "C:\Users\Admin\AppData\Local\Temp\09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:5024
    • C:\Users\Admin\AppData\Local\Temp\09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe
      "C:\Users\Admin\AppData\Local\Temp\09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:124
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\169efb0b-ea79-4a42-9a64-ddc60b2b1e86" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:3916
      • C:\Users\Admin\AppData\Local\Temp\09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe
        "C:\Users\Admin\AppData\Local\Temp\09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2200
        • C:\Users\Admin\AppData\Local\Temp\09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe
          "C:\Users\Admin\AppData\Local\Temp\09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:4900

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

    df80f9ba75076db634761b6132e0d4e3

    SHA1

    07983946fb660752c7cccb2ef82d01ec4c9ecc5d

    SHA256

    d5ff96fd8b416de93a85783192206224cf8821c240cd8ff755f2e8270153dd99

    SHA512

    4ec734c5d29e9ce00b00e42b627253195e8c7a158433fedfcee428e692a6501981c33d7c8a39235f8b691f087145cdbe660b430493edbeedb12588c5cdd5a66a

  • 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

    76acad754bd7aa5340ced025611ead1a

    SHA1

    cd7d8adaa97daa47c3ef494bb0c00c247a39cf7d

    SHA256

    ef9f4cf873820999a935507be6da187aa42e0b2d8fc0467a7182805b768bc759

    SHA512

    2b0ff969b2108e2d043f88f43ea4a2d8d44eae069981b809d238e78f8dd436f6e5b449c0d40ad4f0e69c9429669406a5772e84c181447089a9f9584a90e294c9

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

    Filesize

    392B

    MD5

    a3c4f59b445cc6ce8d6bd967738b2466

    SHA1

    c965d616dfc20ade69f654fdd64940ae0ec71585

    SHA256

    1366d188516345257e9717ade350dd7ee1bcfb647eb96e7abcc0b1aa0e97a2ce

    SHA512

    72ff1445b776189a0fa4c14a18cc2a38f5efa0db3b92ed9c3a432048b2281d8b8a6e88812711b85c995a26cb6a76b1bf68b8df1b3a6d30f33868216bfd13dfce

  • C:\Users\Admin\AppData\Local\169efb0b-ea79-4a42-9a64-ddc60b2b1e86\09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe

    Filesize

    708KB

    MD5

    afc2780d65fe1e67d01ae629cd2f1e0f

    SHA1

    cabfc8608feca588c98e30476e79b9df85171c6f

    SHA256

    09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319

    SHA512

    390b4b8a11c099d512e2388c408492190311b2daaefc063c9279b6cc3f3a96ec3b71a1905556188439b42d29d2bde40662241a4ba08a456e5c72af3307f915b5

  • memory/124-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/124-6-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/124-3-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/124-4-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/124-19-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4900-29-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4900-28-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4900-27-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4900-22-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4900-32-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4900-34-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4900-35-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4900-36-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4900-37-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/5024-1-0x0000000004140000-0x00000000041DD000-memory.dmp

    Filesize

    628KB

  • memory/5024-2-0x0000000004290000-0x00000000043AB000-memory.dmp

    Filesize

    1.1MB