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Analysis

  • max time kernel
    145s
  • max time network
    143s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22/12/2024, 01:56

General

  • Target

    JaffaCakes118_ac7de31e5d302db8b21f712d113b0f08051ed85dd456c21f6ce3349f8493c0e0.exe

  • Size

    848KB

  • MD5

    b87f36483c9186c191d2e4e222eacab0

  • SHA1

    f4fc009fbe9e91bad89e4beda5c616265626b7f2

  • SHA256

    ac7de31e5d302db8b21f712d113b0f08051ed85dd456c21f6ce3349f8493c0e0

  • SHA512

    95cdc58afc587f1b6a4e8d35b558a151dba4faaa324e36b6e35dc2ce8c5be8085e086ec968c93e7e13ab552f4ed51ce7b3abfa272901bd0f2419cdb56f963953

  • SSDEEP

    12288:M8eskKSpU1agkOwpW4M8UWAYDhBuvm+4HTOer65VRAIr87VwCoOyJuBAunnwRs:3WSzwpW4gtm+y2vbYhwpJuBwR

Malware Config

Extracted

Family

djvu

C2

http://fuyt.org/test1/get.php

Attributes
  • extension

    .udla

  • offline_id

    qwVQoIsE2xLety0oNWloOilSDuIBXJGK86LM3ot1

  • payload_url

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

    http://fuyt.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-fnn5kv33Vv 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: 0435JIjdm

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 18 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Djvu 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).

  • 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 26 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_ac7de31e5d302db8b21f712d113b0f08051ed85dd456c21f6ce3349f8493c0e0.exe
    "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_ac7de31e5d302db8b21f712d113b0f08051ed85dd456c21f6ce3349f8493c0e0.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2872
    • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_ac7de31e5d302db8b21f712d113b0f08051ed85dd456c21f6ce3349f8493c0e0.exe
      "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_ac7de31e5d302db8b21f712d113b0f08051ed85dd456c21f6ce3349f8493c0e0.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4516
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\a0bf6bb9-f3b6-4f94-9677-d1c6814fad99" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        • System Location Discovery: System Language Discovery
        PID:3508
      • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_ac7de31e5d302db8b21f712d113b0f08051ed85dd456c21f6ce3349f8493c0e0.exe
        "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_ac7de31e5d302db8b21f712d113b0f08051ed85dd456c21f6ce3349f8493c0e0.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:3616
        • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_ac7de31e5d302db8b21f712d113b0f08051ed85dd456c21f6ce3349f8493c0e0.exe
          "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_ac7de31e5d302db8b21f712d113b0f08051ed85dd456c21f6ce3349f8493c0e0.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          PID:1604

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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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

    49812af54990bd78236bbbe792ffe6cd

    SHA1

    c235ac67f2bdfa964ed2b869cc0dcccece9a99ca

    SHA256

    e66b6f6de7274087bd850fb70636b94e4a030987aec87274495bae6038384090

    SHA512

    71fbdd504491d87d54127674f559663e3388d0dd85c130b1673243abafa62f2cba482b69dcc44165bd6ea177d344c4d0ce970da598ef0c29170bbee0ea303565

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

    Filesize

    170B

    MD5

    c7a425e2f35d41f280e59d6a99ddce60

    SHA1

    a15ace5402cb8f01fba642cb3b3eee9260c9632b

    SHA256

    22961e93d995868ac5c94775c5e3a8e6f6d44f2abe965057d1ae00b585907dd4

    SHA512

    9f5af2f6ec03f10c18ad2308e67e57fe63116a16fa89a433a5836972373ee70dc9adaab0fab5be628373fee167d14bdcff99af6e53a44e029a8f0c7b92a54bc1

  • C:\Users\Admin\AppData\Local\a0bf6bb9-f3b6-4f94-9677-d1c6814fad99\JaffaCakes118_ac7de31e5d302db8b21f712d113b0f08051ed85dd456c21f6ce3349f8493c0e0.exe

    Filesize

    848KB

    MD5

    b87f36483c9186c191d2e4e222eacab0

    SHA1

    f4fc009fbe9e91bad89e4beda5c616265626b7f2

    SHA256

    ac7de31e5d302db8b21f712d113b0f08051ed85dd456c21f6ce3349f8493c0e0

    SHA512

    95cdc58afc587f1b6a4e8d35b558a151dba4faaa324e36b6e35dc2ce8c5be8085e086ec968c93e7e13ab552f4ed51ce7b3abfa272901bd0f2419cdb56f963953

  • memory/1604-24-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1604-29-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1604-49-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1604-48-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1604-21-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1604-22-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1604-47-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1604-46-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1604-44-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1604-35-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1604-31-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1604-30-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2872-2-0x00000000023B0000-0x00000000024CB000-memory.dmp

    Filesize

    1.1MB

  • memory/2872-1-0x0000000002300000-0x000000000239E000-memory.dmp

    Filesize

    632KB

  • memory/3616-23-0x0000000000400000-0x000000000051A000-memory.dmp

    Filesize

    1.1MB

  • memory/3616-19-0x0000000000400000-0x000000000051A000-memory.dmp

    Filesize

    1.1MB

  • memory/4516-6-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4516-4-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4516-3-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4516-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4516-17-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB