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Analysis

  • max time kernel
    144s
  • max time network
    118s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
  • submitted
    31/12/2024, 13:52

General

  • Target

    JaffaCakes118_1fee8e2da2d002444a602391a4dc1b7b.exe

  • Size

    815KB

  • MD5

    1fee8e2da2d002444a602391a4dc1b7b

  • SHA1

    c141c05103bfd6464ae59a0f5b194b4d8eba8598

  • SHA256

    3f23068954a420723036b05e95eb7f3d0cfcae0c4e71ce3f09dc99203c074083

  • SHA512

    f48d534843b110b69bf0a45cc9b1f7fb6c037fe2eca46f838344e0a00b033f53e0783bf881f338bf15e25ea431097ae1c1a67d0831ef338b9d8743089b2b0fdb

  • SSDEEP

    12288:Whb8E/vK17prPrtM9zDJWP2Rl7+rxFUo26JbkoOF+1zV7iDOeJCyu8+AztGGbJNH:c4my1L592gxFU2kGhcCX9E5Il

Malware Config

Extracted

Family

djvu

C2

http://rlrz.org/fhsgtsspen6/get.php

Attributes
  • extension

    .irjg

  • offline_id

    xcdIdDNFh62dy3iJsba1COhcfDENsbjPHQQ2Eht1

  • payload_url

    http://znpst.top/dl/build2.exe

    http://rlrz.org/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-xl2bbDnZSN 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: 0338gSd743d

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 14 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Djvu 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).

  • System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1fee8e2da2d002444a602391a4dc1b7b.exe
    "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1fee8e2da2d002444a602391a4dc1b7b.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1908
    • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1fee8e2da2d002444a602391a4dc1b7b.exe
      "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1fee8e2da2d002444a602391a4dc1b7b.exe"
      2⤵
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1608
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\52ea3cd7-5d60-4ee6-87a5-0b4f3d8b4bba" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        • System Location Discovery: System Language Discovery
        PID:2592
      • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1fee8e2da2d002444a602391a4dc1b7b.exe
        "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1fee8e2da2d002444a602391a4dc1b7b.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2896
        • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1fee8e2da2d002444a602391a4dc1b7b.exe
          "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1fee8e2da2d002444a602391a4dc1b7b.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          PID:2728

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8B2B9A00839EED1DFDCCC3BFC2F5DF12

    Filesize

    1KB

    MD5

    67e486b2f148a3fca863728242b6273e

    SHA1

    452a84c183d7ea5b7c015b597e94af8eef66d44a

    SHA256

    facaf1c3a4bf232abce19a2d534e495b0d3adc7dbe3797d336249aa6f70adcfb

    SHA512

    d3a37da3bb10a9736dc03e8b2b49baceef5d73c026e2077b8ebc1b786f2c9b2f807e0aa13a5866cf3b3cafd2bc506242ef139c423eaffb050bbb87773e53881e

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B46811C17859FFB409CF0E904A4AA8F8

    Filesize

    436B

    MD5

    971c514f84bba0785f80aa1c23edfd79

    SHA1

    732acea710a87530c6b08ecdf32a110d254a54c8

    SHA256

    f157ed17fcaf8837fa82f8b69973848c9b10a02636848f995698212a08f31895

    SHA512

    43dc1425d80e170c645a3e3bb56da8c3acd31bd637329e9e37094ac346ac85434df4edcdbefc05ae00aea33a80a88e2af695997a495611217fe6706075a63c58

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8B2B9A00839EED1DFDCCC3BFC2F5DF12

    Filesize

    174B

    MD5

    4855cb97a3e6853274821ff24a31adde

    SHA1

    afadceb02d6b2b74d51f283f8157c4888777c1b7

    SHA256

    b426ee84c033c981146a83f7059ab2ea78ea2a48a253c343d9229c5e8bdd1beb

    SHA512

    921d1591c8a08c31fe58bff15187bedfa176c25dd73c6f901010a049861d56fb06f3d56f757259f58a1f4abf3212c4ef4b145063288f49675df2ae3f1fc020f4

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

    Filesize

    342B

    MD5

    2224e344a2065a67810330e3bd80f979

    SHA1

    273964fa81414bb23065324dd3847119aca0e020

    SHA256

    768966e56a17d49ee5dd6f031911d997b7f2831d7c3585e2d8eeb5c6f841ccc8

    SHA512

    960c156ed8abec198776c3fdd29b18e9a75e717f4676f005ff9c0631413b9128470fc7e44d2c6fb6221c28a37af696edfc22b4612805e20dd4953ffe49d68158

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B46811C17859FFB409CF0E904A4AA8F8

    Filesize

    170B

    MD5

    9329492632ceba657760502cf5127a17

    SHA1

    940c3f05e5a8eb8715d8940e7066847a6cf48562

    SHA256

    1d796108eae84ad4416938f310ab42c1fa14cdc8afe84ad5259505bd8d2e0796

    SHA512

    f4add1ca80346107499b4d4c51536e5905007a1f44be1766ef1f0fd856b3203d65f157ba513ec18d3ee5b24bbafc6d1e4e4f10b9b24207fea239e4f684825ab7

  • C:\Users\Admin\AppData\Local\52ea3cd7-5d60-4ee6-87a5-0b4f3d8b4bba\JaffaCakes118_1fee8e2da2d002444a602391a4dc1b7b.exe

    Filesize

    815KB

    MD5

    1fee8e2da2d002444a602391a4dc1b7b

    SHA1

    c141c05103bfd6464ae59a0f5b194b4d8eba8598

    SHA256

    3f23068954a420723036b05e95eb7f3d0cfcae0c4e71ce3f09dc99203c074083

    SHA512

    f48d534843b110b69bf0a45cc9b1f7fb6c037fe2eca46f838344e0a00b033f53e0783bf881f338bf15e25ea431097ae1c1a67d0831ef338b9d8743089b2b0fdb

  • C:\Users\Admin\AppData\Local\Temp\Cab1323.tmp

    Filesize

    70KB

    MD5

    49aebf8cbd62d92ac215b2923fb1b9f5

    SHA1

    1723be06719828dda65ad804298d0431f6aff976

    SHA256

    b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

    SHA512

    bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

  • memory/1608-8-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1608-3-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/1608-29-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1608-9-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1608-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1908-2-0x0000000002F90000-0x00000000030AB000-memory.dmp

    Filesize

    1.1MB

  • memory/1908-1-0x00000000017B0000-0x0000000001841000-memory.dmp

    Filesize

    580KB

  • memory/1908-0-0x00000000017B0000-0x0000000001841000-memory.dmp

    Filesize

    580KB

  • memory/1908-6-0x00000000017B0000-0x0000000001841000-memory.dmp

    Filesize

    580KB

  • memory/2728-52-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2728-46-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2728-47-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2728-48-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2728-50-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2728-33-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2728-54-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2728-55-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2728-56-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2896-30-0x0000000000270000-0x0000000000301000-memory.dmp

    Filesize

    580KB