Analysis

  • max time kernel
    298s
  • max time network
    298s
  • platform
    windows10-1703_x64
  • resource
    win10-20231215-en
  • resource tags

    arch:x64arch:x86image:win10-20231215-enlocale:en-usos:windows10-1703-x64system
  • submitted
    15/01/2024, 04:51

General

  • Target

    5a34ca5e10a7a7d16004ac527df6de33aae7029574ac58d27fc4070070060989.exe

  • Size

    849KB

  • MD5

    72fd6329b754dd39cfec917c900abb53

  • SHA1

    fa5e56d102dacecf25547c850e3624b41a85c62b

  • SHA256

    5a34ca5e10a7a7d16004ac527df6de33aae7029574ac58d27fc4070070060989

  • SHA512

    0c3bd337190662d25af61cce7c5f2fd86c72ec7e0d73e9c2a4fc9ff816f0e5d331b881d9548086db9496ff98755791e23a5346e5d5888a8e08b7203e2a62ea55

  • SSDEEP

    12288:ev0ZHRrxb4fKFjLWA37A1jrX0Hq1+KiFja4rS+P008/Daab1Cw4GT:ev09RvFz3o91+o4rS+P00KfWm

Malware Config

Extracted

Family

djvu

C2

http://zexeq.com/test1/get.php

Attributes
  • extension

    .cdwe

  • offline_id

    dSwr1XNNi5cIitB5eDPbMANcusB1dWGDB8ToUnt1

  • payload_url

    http://brusuax.com/dl/build2.exe

    http://zexeq.com/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-e21iz7dS58 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: 0842ASdw

rsa_pubkey.plain

Signatures

  • Detect Vidar Stealer 5 IoCs
  • Detected Djvu ransomware 17 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Downloads MZ/PE file
  • 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
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 39 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\5a34ca5e10a7a7d16004ac527df6de33aae7029574ac58d27fc4070070060989.exe
    "C:\Users\Admin\AppData\Local\Temp\5a34ca5e10a7a7d16004ac527df6de33aae7029574ac58d27fc4070070060989.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3380
    • C:\Users\Admin\AppData\Local\Temp\5a34ca5e10a7a7d16004ac527df6de33aae7029574ac58d27fc4070070060989.exe
      "C:\Users\Admin\AppData\Local\Temp\5a34ca5e10a7a7d16004ac527df6de33aae7029574ac58d27fc4070070060989.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3876
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\dc68dece-be16-4b9f-a710-d0fd190858cb" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:1076
      • C:\Users\Admin\AppData\Local\Temp\5a34ca5e10a7a7d16004ac527df6de33aae7029574ac58d27fc4070070060989.exe
        "C:\Users\Admin\AppData\Local\Temp\5a34ca5e10a7a7d16004ac527df6de33aae7029574ac58d27fc4070070060989.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:364
        • C:\Users\Admin\AppData\Local\Temp\5a34ca5e10a7a7d16004ac527df6de33aae7029574ac58d27fc4070070060989.exe
          "C:\Users\Admin\AppData\Local\Temp\5a34ca5e10a7a7d16004ac527df6de33aae7029574ac58d27fc4070070060989.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:4896
          • C:\Users\Admin\AppData\Local\e0d07755-3ba1-4fb8-9a23-b7ae607427d2\build2.exe
            "C:\Users\Admin\AppData\Local\e0d07755-3ba1-4fb8-9a23-b7ae607427d2\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:772
            • C:\Users\Admin\AppData\Local\e0d07755-3ba1-4fb8-9a23-b7ae607427d2\build2.exe
              "C:\Users\Admin\AppData\Local\e0d07755-3ba1-4fb8-9a23-b7ae607427d2\build2.exe"
              6⤵
              • Executes dropped EXE
              PID:1480
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 1480 -s 1896
                7⤵
                • Program crash
                PID:4516

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

          Filesize

          1KB

          MD5

          b7470a9aa569b259d4c2bb3b80ae3aa3

          SHA1

          093290296b7f1e402ef96e4b33a88f064aa401eb

          SHA256

          ee8aeed77dd9f1631fa75845214d75bfe04951a61892410ee369035e13fd14c6

          SHA512

          4da3fc09260692f159c37b068664852931b712c8173de5e4b294799ac33ecf179055aaeb016fd0afad88cbfc50a571c4c88033dca56a573431af7462ea7979be

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

          Filesize

          724B

          MD5

          8202a1cd02e7d69597995cabbe881a12

          SHA1

          8858d9d934b7aa9330ee73de6c476acf19929ff6

          SHA256

          58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5

          SHA512

          97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

          Filesize

          410B

          MD5

          8269da8ab4a44aa7076d53a87a3e6d7b

          SHA1

          d23ea909b27994ffc29d2760c14fdcf54bf33b9c

          SHA256

          c9eef76da9cd8e392e3e755c866a12fb3c3d47b0cd167ce9f6ddc3a66702f90d

          SHA512

          65d76174905cc9f321cc81b083f407fbb4af9d66ac691a6ae0a466f016735c616f295347a033a4c7ff7a5a93d2235a430603dd0eb8615c318d123fce5972c49f

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

          Filesize

          392B

          MD5

          11581ed9bf85b0762bf9b961896437dc

          SHA1

          3e3abd053edb2ec712e42a12e7611fbc0c918c94

          SHA256

          8ee0f48aa91271b864f9820021b729f0032be7423d0a1f369f02d20b0db954ca

          SHA512

          65cf11c761fd7ae7040242ceab43c3576f9021f203c1bd0be260ffcc73ed09ee5e8898ab9158d2743e38c08e52fc972dd4157af4c323a6677e3a37d207da7198

        • C:\Users\Admin\AppData\Local\dc68dece-be16-4b9f-a710-d0fd190858cb\5a34ca5e10a7a7d16004ac527df6de33aae7029574ac58d27fc4070070060989.exe

          Filesize

          849KB

          MD5

          72fd6329b754dd39cfec917c900abb53

          SHA1

          fa5e56d102dacecf25547c850e3624b41a85c62b

          SHA256

          5a34ca5e10a7a7d16004ac527df6de33aae7029574ac58d27fc4070070060989

          SHA512

          0c3bd337190662d25af61cce7c5f2fd86c72ec7e0d73e9c2a4fc9ff816f0e5d331b881d9548086db9496ff98755791e23a5346e5d5888a8e08b7203e2a62ea55

        • C:\Users\Admin\AppData\Local\e0d07755-3ba1-4fb8-9a23-b7ae607427d2\build2.exe

          Filesize

          358KB

          MD5

          c4070da9f9b0581171af16e681ccdff8

          SHA1

          3fb4182921fdc3acd7873ebe113ac5522585312a

          SHA256

          26063c78e5418610471a9f3a00a155d7d1e5b29856e1979ba3bdc42681a871d0

          SHA512

          c7569cea7f1a841e7cac9cd41287dba3bcacf2cf9dee7bece88800848a7ad5dc4cd2bdc896c7389f0f1144079bbe168048b3f722bcd76fa5d6e14f3081bb6427

        • memory/364-21-0x0000000000870000-0x0000000000910000-memory.dmp

          Filesize

          640KB

        • memory/772-41-0x0000000000810000-0x000000000085B000-memory.dmp

          Filesize

          300KB

        • memory/772-40-0x00000000005D0000-0x00000000006D0000-memory.dmp

          Filesize

          1024KB

        • memory/1480-51-0x0000000000400000-0x000000000065E000-memory.dmp

          Filesize

          2.4MB

        • memory/1480-46-0x0000000000400000-0x000000000065E000-memory.dmp

          Filesize

          2.4MB

        • memory/1480-45-0x0000000000400000-0x000000000065E000-memory.dmp

          Filesize

          2.4MB

        • memory/1480-42-0x0000000000400000-0x000000000065E000-memory.dmp

          Filesize

          2.4MB

        • memory/3380-2-0x00000000022A0000-0x00000000023BB000-memory.dmp

          Filesize

          1.1MB

        • memory/3380-1-0x0000000000A60000-0x0000000000AF6000-memory.dmp

          Filesize

          600KB

        • memory/3876-6-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3876-5-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3876-4-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3876-17-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3876-3-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4896-38-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4896-29-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4896-22-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4896-24-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4896-23-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4896-30-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4896-53-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4896-55-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4896-56-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4896-58-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB