Analysis

  • max time kernel
    141s
  • max time network
    126s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20-08-2024 11:30

General

  • Target

    af0b8f5af76165683f16c178e20703f0_JaffaCakes118.exe

  • Size

    812KB

  • MD5

    af0b8f5af76165683f16c178e20703f0

  • SHA1

    9d6e0772131c0a338caa0458e59b9e66f6ee1e2c

  • SHA256

    22ed8ba56c9a195d2f2b50133b9ba06e6cc0705fd3003cd76c2717547443f3d4

  • SHA512

    99010c90cf3d71d1577724f3726a90d03e49595f7b32d7daf50ff076bd712d383c34639a28ab3c49c45e468ee4cbc186ba39b28806ab74c9f3705b376dcdf03a

  • SSDEEP

    24576:9r33kKHXw2x9eo20ZcWB7kHkIreRbLd6:9LkKgo1Z/BIEIr2

Malware Config

Extracted

Family

djvu

C2

http://cjto.top/nddddhsspen6/get.php

Attributes
  • extension

    .copa

  • offline_id

    5sHsKew2XYnEguRaSVYIA8rudOB16MVLvPgGIOt1

  • payload_url

    http://cjto.top/files/penelop/updatewin1.exe

    http://cjto.top/files/penelop/updatewin2.exe

    http://cjto.top/files/penelop/updatewin.exe

    http://cjto.top/files/penelop/3.exe

    http://cjto.top/files/penelop/4.exe

    http://cjto.top/files/penelop/5.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-NYlGSMNN9r 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: 0253Ijrfg

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 12 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Renames multiple (180) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 IoCs
  • Modifies file permissions 1 TTPs 1 IoCs
  • UPX packed file 3 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Looks up external IP address via web service 4 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Program crash 3 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\af0b8f5af76165683f16c178e20703f0_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\af0b8f5af76165683f16c178e20703f0_JaffaCakes118.exe"
    1⤵
    • Checks computer location settings
    • Adds Run key to start application
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4928
    • C:\Windows\SysWOW64\icacls.exe
      icacls "C:\Users\Admin\AppData\Local\b402d343-a5d2-4929-a5ae-a92a6778fdf2" /deny *S-1-1-0:(OI)(CI)(DE,DC)
      2⤵
      • Modifies file permissions
      • System Location Discovery: System Language Discovery
      PID:5044
    • C:\Users\Admin\AppData\Local\Temp\af0b8f5af76165683f16c178e20703f0_JaffaCakes118.exe
      "C:\Users\Admin\AppData\Local\Temp\af0b8f5af76165683f16c178e20703f0_JaffaCakes118.exe" --Admin IsNotAutoStart IsNotTask
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      PID:2160
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 2160 -s 1696
        3⤵
        • Program crash
        PID:1756
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4928 -s 1776
      2⤵
      • Program crash
      PID:452
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4928 -ip 4928
    1⤵
      PID:1472
    • C:\Users\Admin\AppData\Local\b402d343-a5d2-4929-a5ae-a92a6778fdf2\af0b8f5af76165683f16c178e20703f0_JaffaCakes118.exe
      C:\Users\Admin\AppData\Local\b402d343-a5d2-4929-a5ae-a92a6778fdf2\af0b8f5af76165683f16c178e20703f0_JaffaCakes118.exe --Task
      1⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      PID:872
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 872 -s 1092
        2⤵
        • Program crash
        PID:4988
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 360 -p 872 -ip 872
      1⤵
        PID:3776
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 488 -p 2160 -ip 2160
        1⤵
          PID:4796

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

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

          Filesize

          1KB

          MD5

          7fb5fa1534dcf77f2125b2403b30a0ee

          SHA1

          365d96812a69ac0a4611ea4b70a3f306576cc3ea

          SHA256

          33a39e9ec2133230533a686ec43760026e014a3828c703707acbc150fe40fd6f

          SHA512

          a9279fd60505a1bfeef6fb07834cad0fd5be02fd405573fc1a5f59b991e9f88f5e81c32fe910f69bdc6585e71f02559895149eaf49c25b8ff955459fd60c0d2e

        • 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

          bf0cff7d9f699b55c41f996cf9eaaf76

          SHA1

          56d6b3e38b6825262a1010b1f74940babd37068e

          SHA256

          d53028af6c6bcd4ed488b81db2312c845a39495bf68997b575f8d4ce909ec6bc

          SHA512

          fe5a5b70f502bc1e2692ed6e2961af42e5f0ef5fcebf405337cd1a86041013db5608e370e2bebecf876b0152918db1735ebb50676fb0ae8eb145c46638d582d2

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

          Filesize

          170B

          MD5

          e50b4ab669264447fa2ef8e138cc724b

          SHA1

          6f285bd602f3b704712119852b581658e38962df

          SHA256

          3c7be33eb9f7e2dbc3e5bb48b50a39b2a153a0688833a1c4affb49ddc26407a9

          SHA512

          a2cd1fc55317bbda3b0b55505afe5da8f5a918c9de4c4ff98c6e6b0181d30f3efd25b0cd0e77145a1fef15dcaa383b083e16be022f50412a71dfec4b13debe44

        • C:\Users\Admin\AppData\Local\b402d343-a5d2-4929-a5ae-a92a6778fdf2\af0b8f5af76165683f16c178e20703f0_JaffaCakes118.exe

          Filesize

          812KB

          MD5

          af0b8f5af76165683f16c178e20703f0

          SHA1

          9d6e0772131c0a338caa0458e59b9e66f6ee1e2c

          SHA256

          22ed8ba56c9a195d2f2b50133b9ba06e6cc0705fd3003cd76c2717547443f3d4

          SHA512

          99010c90cf3d71d1577724f3726a90d03e49595f7b32d7daf50ff076bd712d383c34639a28ab3c49c45e468ee4cbc186ba39b28806ab74c9f3705b376dcdf03a

        • memory/872-49-0x0000000000400000-0x0000000000CCB000-memory.dmp

          Filesize

          8.8MB

        • memory/872-46-0x0000000000400000-0x0000000000CCB000-memory.dmp

          Filesize

          8.8MB

        • memory/2160-32-0x0000000000400000-0x0000000000CCB000-memory.dmp

          Filesize

          8.8MB

        • memory/2160-20-0x0000000000400000-0x0000000000CCB000-memory.dmp

          Filesize

          8.8MB

        • memory/2160-21-0x0000000000400000-0x0000000000CCB000-memory.dmp

          Filesize

          8.8MB

        • memory/2160-28-0x0000000000400000-0x0000000000CCB000-memory.dmp

          Filesize

          8.8MB

        • memory/2160-33-0x0000000000400000-0x0000000000CCB000-memory.dmp

          Filesize

          8.8MB

        • memory/2160-412-0x0000000000400000-0x0000000000CCB000-memory.dmp

          Filesize

          8.8MB

        • memory/4928-16-0x0000000000400000-0x0000000000CCB000-memory.dmp

          Filesize

          8.8MB

        • memory/4928-17-0x00000000012C0000-0x00000000013DA000-memory.dmp

          Filesize

          1.1MB

        • memory/4928-18-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4928-4-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4928-0-0x0000000000400000-0x0000000000CCB000-memory.dmp

          Filesize

          8.8MB

        • memory/4928-3-0x00000000012C0000-0x00000000013DA000-memory.dmp

          Filesize

          1.1MB

        • memory/4928-2-0x00000000011E0000-0x000000000127E000-memory.dmp

          Filesize

          632KB