Analysis

  • max time kernel
    147s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-05-2024 23:35

General

  • Target

    c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe

  • Size

    805KB

  • MD5

    503be6986d24118cfbe56e9cb9748193

  • SHA1

    025ae1229044bb5bf5559f9cb447d026391eb5df

  • SHA256

    c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf

  • SHA512

    a16e29bbdb70a9cdac67996e4e76e08b69830bb5ee4d432ba01adb5cae204105c81bd15a95c52d1a2199b76b87aa9a9c295fcafb4ec50565967645814368a175

  • SSDEEP

    12288:unHenMyYcoFXKrKtWe198EIXj24h1ogqMYVvrcVfY:k+nBEKuoe19IXjnvkVjcVg

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 16 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\c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe
    "C:\Users\Admin\AppData\Local\Temp\c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3532
    • C:\Users\Admin\AppData\Local\Temp\c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe
      "C:\Users\Admin\AppData\Local\Temp\c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3204
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\d258bc30-fc1d-477d-8dbd-03b578781e02" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2028
      • C:\Users\Admin\AppData\Local\Temp\c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe
        "C:\Users\Admin\AppData\Local\Temp\c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:5052
        • C:\Users\Admin\AppData\Local\Temp\c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe
          "C:\Users\Admin\AppData\Local\Temp\c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:4828
  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4076 --field-trial-handle=1928,i,13242902252791919845,10377620236057253993,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:496

    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

      a1d955617a4d146e70544d0d9a0390ca

      SHA1

      5ffdc4453b23e24a7cb0e634b26864c169f5257b

      SHA256

      8dbff2c0018158256912d87dd495a68c351303a319f50f204a930317e867aeb3

      SHA512

      0bffbc27638b12cc04f335de8c4f3c74df01ae55b56f389f8d046d797b4c62d31bbff057ea75ce32f67cdd3b878fd0aad3eb62e983f814296e1b94de3c6ba810

    • 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

      bde12719571a521ead14e0d15427cd51

      SHA1

      1ca8c6cdcfce402a1cdfad20784bd98e7d28d36c

      SHA256

      68e9d7ce43d750c6a19cc9de5ea9f18636d0644a99b4ee0cb25f7e09d196340d

      SHA512

      da0377497987a698761dc6057963275d6064fa2378e96bf18851ee1a809f6866fb7be47f1e47b26785d4b836c20150f10e02b59a99771f56048d2dc2b22ca806

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

      Filesize

      392B

      MD5

      511b73b3f943255c0c9a2fef3f430d80

      SHA1

      d91cad6eb7144e1425e277c60ce7845ade442de7

      SHA256

      583db93d2574186876a051fb698cdc2e3763393a044813fa8ea73e4a7e38e377

      SHA512

      22c2225b60554710d8f59692fcfc68b05ba0c6ec1f51c09fa157ffa2b4bef84e3a7ee81d8d396eed7645df0ac63ae5aa5b4ba5771742f0bc96a21c3e4a78f20f

    • C:\Users\Admin\AppData\Local\d258bc30-fc1d-477d-8dbd-03b578781e02\c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe

      Filesize

      805KB

      MD5

      503be6986d24118cfbe56e9cb9748193

      SHA1

      025ae1229044bb5bf5559f9cb447d026391eb5df

      SHA256

      c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf

      SHA512

      a16e29bbdb70a9cdac67996e4e76e08b69830bb5ee4d432ba01adb5cae204105c81bd15a95c52d1a2199b76b87aa9a9c295fcafb4ec50565967645814368a175

    • memory/3204-6-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/3204-3-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/3204-18-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/3204-5-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/3204-4-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/3532-1-0x00000000024C0000-0x0000000002560000-memory.dmp

      Filesize

      640KB

    • memory/3532-2-0x0000000004170000-0x000000000428B000-memory.dmp

      Filesize

      1.1MB

    • memory/4828-28-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/4828-23-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/4828-21-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/4828-29-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/4828-30-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/4828-33-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/4828-35-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/4828-36-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/4828-37-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/4828-38-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB