Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240730-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240730-enlocale:en-usos:windows10-2004-x64system
  • submitted
    31-07-2024 10:53

General

  • Target

    eaffdf51b17ef1b7b7bf01ab6e8c2dce61a3dbd875b368e06a6d3b95e100c6f1.exe

  • Size

    741KB

  • MD5

    ff37dbded7b1aca2b45edefa43c3a118

  • SHA1

    4d6134569c11ee02713d1b6cbb480951063c26d1

  • SHA256

    eaffdf51b17ef1b7b7bf01ab6e8c2dce61a3dbd875b368e06a6d3b95e100c6f1

  • SHA512

    71d7ba2a15196abc3ca0e6dfe088e4f921ef2b91f390042c2ac17fbbf817403160ae0c4e199ca829dc335c49dc2b9907ee10656f18a1c1c8e4acc0c541787160

  • SSDEEP

    12288:OYVkl4tUskGpkAQwC5ewwHnbb9gTn0RWNJ73rJVDkeKZm:OY64W9GpklwJbb+0RWNR7mZm

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .gujd

  • offline_id

    NcBG8wI6Q1WFhUNlCRyjmrWGeGew2vvCKtJgKot1

  • payload_url

    http://securebiz.org/dl/build2.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-mNr1oio2P6 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: 0316ewgfDd

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 11 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.

  • Executes dropped EXE 2 IoCs
  • 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 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 7 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 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\eaffdf51b17ef1b7b7bf01ab6e8c2dce61a3dbd875b368e06a6d3b95e100c6f1.exe
    "C:\Users\Admin\AppData\Local\Temp\eaffdf51b17ef1b7b7bf01ab6e8c2dce61a3dbd875b368e06a6d3b95e100c6f1.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2932
    • C:\Users\Admin\AppData\Local\Temp\eaffdf51b17ef1b7b7bf01ab6e8c2dce61a3dbd875b368e06a6d3b95e100c6f1.exe
      "C:\Users\Admin\AppData\Local\Temp\eaffdf51b17ef1b7b7bf01ab6e8c2dce61a3dbd875b368e06a6d3b95e100c6f1.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:3884
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\b56ba862-af1d-4e6c-9e65-ebd8cd68969d" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        • System Location Discovery: System Language Discovery
        PID:1540
      • C:\Users\Admin\AppData\Local\Temp\eaffdf51b17ef1b7b7bf01ab6e8c2dce61a3dbd875b368e06a6d3b95e100c6f1.exe
        "C:\Users\Admin\AppData\Local\Temp\eaffdf51b17ef1b7b7bf01ab6e8c2dce61a3dbd875b368e06a6d3b95e100c6f1.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:4840
        • C:\Users\Admin\AppData\Local\Temp\eaffdf51b17ef1b7b7bf01ab6e8c2dce61a3dbd875b368e06a6d3b95e100c6f1.exe
          "C:\Users\Admin\AppData\Local\Temp\eaffdf51b17ef1b7b7bf01ab6e8c2dce61a3dbd875b368e06a6d3b95e100c6f1.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • System Location Discovery: System Language Discovery
          PID:2376
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 2376 -s 568
            5⤵
            • Program crash
            PID:4508
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2376 -ip 2376
    1⤵
      PID:4072
    • C:\Users\Admin\AppData\Local\b56ba862-af1d-4e6c-9e65-ebd8cd68969d\eaffdf51b17ef1b7b7bf01ab6e8c2dce61a3dbd875b368e06a6d3b95e100c6f1.exe
      C:\Users\Admin\AppData\Local\b56ba862-af1d-4e6c-9e65-ebd8cd68969d\eaffdf51b17ef1b7b7bf01ab6e8c2dce61a3dbd875b368e06a6d3b95e100c6f1.exe --Task
      1⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4336
      • C:\Users\Admin\AppData\Local\b56ba862-af1d-4e6c-9e65-ebd8cd68969d\eaffdf51b17ef1b7b7bf01ab6e8c2dce61a3dbd875b368e06a6d3b95e100c6f1.exe
        C:\Users\Admin\AppData\Local\b56ba862-af1d-4e6c-9e65-ebd8cd68969d\eaffdf51b17ef1b7b7bf01ab6e8c2dce61a3dbd875b368e06a6d3b95e100c6f1.exe --Task
        2⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        PID:4388

    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

      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

      726518b76d779a6379981615aa12060b

      SHA1

      ccb157311e9d9a8f64237c183e9a5d9314f66c10

      SHA256

      46791c71d7a4d4aaa9069dc285108c1bc726a46743f9af3160c40e11a6bbb688

      SHA512

      5c5006e9286f607beebb33b7f998ca88de0bb209b6fb5ecd9e4aabc0658c54bbb5d26a3a6d70a2d8a6beabf6a2a128938202578abfb9c902ba8ad5042e8b169e

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

      Filesize

      170B

      MD5

      c3b29ed83d75472dbc8f6aaa6077c762

      SHA1

      d2ba95e4e9c39386c5450fa09dcd09b03cea0fa6

      SHA256

      c4fff9e1d622770847c95766da3cbd84b53b7b887ead0a5eaa87a05583c1467a

      SHA512

      9dd9a995f50a7998f34f5f6e20a3c0e2d2c8649708609d627dc1c2bc31737d8e6761c3656e15928d986a10d03d19d7d05fb33c3754bd7cd085d2e7b6a1827b82

    • C:\Users\Admin\AppData\Local\b56ba862-af1d-4e6c-9e65-ebd8cd68969d\eaffdf51b17ef1b7b7bf01ab6e8c2dce61a3dbd875b368e06a6d3b95e100c6f1.exe

      Filesize

      741KB

      MD5

      ff37dbded7b1aca2b45edefa43c3a118

      SHA1

      4d6134569c11ee02713d1b6cbb480951063c26d1

      SHA256

      eaffdf51b17ef1b7b7bf01ab6e8c2dce61a3dbd875b368e06a6d3b95e100c6f1

      SHA512

      71d7ba2a15196abc3ca0e6dfe088e4f921ef2b91f390042c2ac17fbbf817403160ae0c4e199ca829dc335c49dc2b9907ee10656f18a1c1c8e4acc0c541787160

    • memory/2376-23-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2376-22-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2376-25-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2932-1-0x00000000026C0000-0x000000000275E000-memory.dmp

      Filesize

      632KB

    • memory/2932-2-0x00000000028C0000-0x00000000029DB000-memory.dmp

      Filesize

      1.1MB

    • memory/3884-5-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/3884-6-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/3884-4-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/3884-3-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/3884-20-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/4388-35-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/4388-40-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/4840-27-0x0000000000400000-0x0000000000A34000-memory.dmp

      Filesize

      6.2MB

    • memory/4840-26-0x0000000000400000-0x0000000000A34000-memory.dmp

      Filesize

      6.2MB

    • memory/4840-30-0x0000000000400000-0x0000000000A34000-memory.dmp

      Filesize

      6.2MB