Analysis

  • max time kernel
    86s
  • max time network
    131s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26/01/2024, 08:54

General

  • Target

    file.exe

  • Size

    749KB

  • MD5

    87ba288f14fbf826d4cf061d9f8e72ed

  • SHA1

    ec1f877e40b5e8917953e54eb51834a15335aa6e

  • SHA256

    56529b359e4c4695a3e290752d61c59ad3327a16574da95ca69a214552241a63

  • SHA512

    200457f3c9f1120c6c97df354d7e9898e0a3dfecb6fb771985f9e28adaab29841e03e37e1100b759ae7baf89072859082aa3ddc340a8501396426441f8391f95

  • SSDEEP

    12288:lL++FQkxaH3tr2VBEMuw6mQVSql6SoP0bSJg5J8m5ubKrD4Akb5i2yj5+:U+FQkxI2E5oPI0Kp5ubKX4S+

Malware Config

Extracted

Family

djvu

C2

http://habrafa.com/test2/get.php

Attributes
  • extension

    .cdxx

  • offline_id

    LBxKKiegnAy53rpqH3Pj2j46vwldiEt9kqHSuMt1

  • payload_url

  • 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-iVcrVFVRqu Price of private key and decrypt software is $1999. Discount 50% available if you contact us first 72 hours, that's price for you is $999. 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: 0847ASdw

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 9 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 2 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).

  • Program crash 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1320
    • C:\Users\Admin\AppData\Local\Temp\file.exe
      "C:\Users\Admin\AppData\Local\Temp\file.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1068
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\f0a74db3-6da6-44d6-b434-19346e459dc6" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2392
      • C:\Users\Admin\AppData\Local\Temp\file.exe
        "C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:8
        • C:\Users\Admin\AppData\Local\Temp\file.exe
          "C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
            PID:4720
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -u -p 4720 -s 568
              5⤵
              • Program crash
              PID:4356
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 4720 -ip 4720
      1⤵
        PID:4236

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            • C:\Users\Admin\AppData\Local\f0a74db3-6da6-44d6-b434-19346e459dc6\file.exe

              Filesize

              749KB

              MD5

              87ba288f14fbf826d4cf061d9f8e72ed

              SHA1

              ec1f877e40b5e8917953e54eb51834a15335aa6e

              SHA256

              56529b359e4c4695a3e290752d61c59ad3327a16574da95ca69a214552241a63

              SHA512

              200457f3c9f1120c6c97df354d7e9898e0a3dfecb6fb771985f9e28adaab29841e03e37e1100b759ae7baf89072859082aa3ddc340a8501396426441f8391f95

            • memory/1068-1-0x0000000000400000-0x0000000000537000-memory.dmp

              Filesize

              1.2MB

            • memory/1068-2-0x0000000000400000-0x0000000000537000-memory.dmp

              Filesize

              1.2MB

            • memory/1068-3-0x0000000000400000-0x0000000000537000-memory.dmp

              Filesize

              1.2MB

            • memory/1068-4-0x0000000000400000-0x0000000000537000-memory.dmp

              Filesize

              1.2MB

            • memory/1068-15-0x0000000000400000-0x0000000000537000-memory.dmp

              Filesize

              1.2MB

            • memory/1320-0-0x0000000004A40000-0x0000000004B5B000-memory.dmp

              Filesize

              1.1MB

            • memory/4720-18-0x0000000000400000-0x0000000000537000-memory.dmp

              Filesize

              1.2MB

            • memory/4720-19-0x0000000000400000-0x0000000000537000-memory.dmp

              Filesize

              1.2MB

            • memory/4720-21-0x0000000000400000-0x0000000000537000-memory.dmp

              Filesize

              1.2MB