Analysis

  • max time kernel
    299s
  • max time network
    305s
  • 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, 04:48

General

  • Target

    1a00b83b89579d21ffdfa114fc9cc74e283807af6bc1261d20e218953f8569a9.exe

  • Size

    838KB

  • MD5

    1f940a42c9441ea89bc4003de7dd477a

  • SHA1

    50d68efbd5390fa9421696fe86a03a893b0b12e4

  • SHA256

    1a00b83b89579d21ffdfa114fc9cc74e283807af6bc1261d20e218953f8569a9

  • SHA512

    bc393859e58a89701ebdd92bff35d8265ec991ecdc9bcb9db47c246b309b70ae142320092157f74f0ea6b34171034820589d5807a17451a051eeb61d366dad99

  • SSDEEP

    12288:R0+9YhTj9yMkBAONeXiIb/a4jCbKt/uIKfzLkhs34JKywTvcmK:V9YB9GBZNeXj/01zL71TEmK

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .cdpo

  • offline_id

    Bn3q97hwLouKbhkQRNO4SeV07gjdEQVm8NKhg0t1

  • payload_url

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

    http://habrafa.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-FCWSCsjEWS 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: 0844OSkw

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 21 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Downloads MZ/PE file
  • Executes dropped EXE 12 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 8 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1a00b83b89579d21ffdfa114fc9cc74e283807af6bc1261d20e218953f8569a9.exe
    "C:\Users\Admin\AppData\Local\Temp\1a00b83b89579d21ffdfa114fc9cc74e283807af6bc1261d20e218953f8569a9.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3784
    • C:\Users\Admin\AppData\Local\Temp\1a00b83b89579d21ffdfa114fc9cc74e283807af6bc1261d20e218953f8569a9.exe
      "C:\Users\Admin\AppData\Local\Temp\1a00b83b89579d21ffdfa114fc9cc74e283807af6bc1261d20e218953f8569a9.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4856
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\9213a82c-40b6-4851-a48f-a31ca9d49ee3" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:64
      • C:\Users\Admin\AppData\Local\Temp\1a00b83b89579d21ffdfa114fc9cc74e283807af6bc1261d20e218953f8569a9.exe
        "C:\Users\Admin\AppData\Local\Temp\1a00b83b89579d21ffdfa114fc9cc74e283807af6bc1261d20e218953f8569a9.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3480
        • C:\Users\Admin\AppData\Local\Temp\1a00b83b89579d21ffdfa114fc9cc74e283807af6bc1261d20e218953f8569a9.exe
          "C:\Users\Admin\AppData\Local\Temp\1a00b83b89579d21ffdfa114fc9cc74e283807af6bc1261d20e218953f8569a9.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:4120
          • C:\Users\Admin\AppData\Local\956d832f-550f-48bf-9e80-4f40dffc3912\build3.exe
            "C:\Users\Admin\AppData\Local\956d832f-550f-48bf-9e80-4f40dffc3912\build3.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:1432
            • C:\Users\Admin\AppData\Local\956d832f-550f-48bf-9e80-4f40dffc3912\build3.exe
              "C:\Users\Admin\AppData\Local\956d832f-550f-48bf-9e80-4f40dffc3912\build3.exe"
              6⤵
              • Executes dropped EXE
              • Suspicious use of WriteProcessMemory
              PID:3468
              • C:\Windows\SysWOW64\schtasks.exe
                /C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"
                7⤵
                • Creates scheduled task(s)
                PID:5112
  • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2924
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:4520
      • C:\Windows\SysWOW64\schtasks.exe
        /C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"
        3⤵
        • Creates scheduled task(s)
        PID:3208
  • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:632
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      PID:2772
  • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4600
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      PID:3584
  • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    PID:4828
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      PID:3500
  • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    PID:2216
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      PID:3336

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        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

          6e9cc2d0f108323284a259c1c551ac5f

          SHA1

          e306b22da83d88df1becbea28095fbcebc624b23

          SHA256

          a6b9345209b4638d4ed95d6f55cccbb974ee2ceeac34a778791c9595dbdfed35

          SHA512

          7241892f9d3b56f07df3c19dd16fb4769ff4fdf89c607189b286a807e6dd0304cfb2ccfb34856da5aa09f2cfa64e57e75f8cab2f5979d35b695ac11102992c66

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

          Filesize

          392B

          MD5

          5a89c688d8f45a31d52261c889606fcf

          SHA1

          fa576a68ef082950cfbeb51a404cb0ccbc880315

          SHA256

          d520b65b9a91c14309fd46ea72712049728227c38e9c1c672f48662563662675

          SHA512

          cbba2c08150d1464c157b33651d7252d673ca78e85af543f09c14e3215be05fabc05e0ff44a7e93f2fa9e5642c64171cd6d45367e3969897716e67a4714e426f

        • C:\Users\Admin\AppData\Local\9213a82c-40b6-4851-a48f-a31ca9d49ee3\1a00b83b89579d21ffdfa114fc9cc74e283807af6bc1261d20e218953f8569a9.exe

          Filesize

          838KB

          MD5

          1f940a42c9441ea89bc4003de7dd477a

          SHA1

          50d68efbd5390fa9421696fe86a03a893b0b12e4

          SHA256

          1a00b83b89579d21ffdfa114fc9cc74e283807af6bc1261d20e218953f8569a9

          SHA512

          bc393859e58a89701ebdd92bff35d8265ec991ecdc9bcb9db47c246b309b70ae142320092157f74f0ea6b34171034820589d5807a17451a051eeb61d366dad99

        • C:\Users\Admin\AppData\Local\956d832f-550f-48bf-9e80-4f40dffc3912\build3.exe

          Filesize

          299KB

          MD5

          41b883a061c95e9b9cb17d4ca50de770

          SHA1

          1daf96ec21d53d9a4699cea9b4db08cda6fbb5ad

          SHA256

          fef2c8ca07c500e416fd7700a381c39899ee26ce1119f62e7c65cf922ce8b408

          SHA512

          cdd1bb3a36182575cd715a52815765161eeaa3849e72c1c2a9a4e84cc43af9f8ec4997e642702bb3de41f162d2e8fd8717f6f8302bba5306821ee4d155626319

        • memory/632-86-0x0000000000A50000-0x0000000000B50000-memory.dmp

          Filesize

          1024KB

        • memory/1432-51-0x0000000000850000-0x0000000000854000-memory.dmp

          Filesize

          16KB

        • memory/1432-49-0x0000000000950000-0x0000000000A50000-memory.dmp

          Filesize

          1024KB

        • memory/2216-148-0x0000000000990000-0x0000000000A90000-memory.dmp

          Filesize

          1024KB

        • memory/2924-65-0x0000000000B60000-0x0000000000C60000-memory.dmp

          Filesize

          1024KB

        • memory/3468-54-0x0000000000400000-0x0000000000406000-memory.dmp

          Filesize

          24KB

        • memory/3468-48-0x0000000000400000-0x0000000000406000-memory.dmp

          Filesize

          24KB

        • memory/3468-56-0x0000000000410000-0x00000000004D5000-memory.dmp

          Filesize

          788KB

        • memory/3468-53-0x0000000000400000-0x0000000000406000-memory.dmp

          Filesize

          24KB

        • memory/3480-21-0x0000000002400000-0x000000000249E000-memory.dmp

          Filesize

          632KB

        • memory/3784-1-0x00000000025B0000-0x0000000002647000-memory.dmp

          Filesize

          604KB

        • memory/3784-2-0x0000000002680000-0x000000000279B000-memory.dmp

          Filesize

          1.1MB

        • memory/4120-22-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4120-23-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4120-38-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4120-36-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4120-45-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4120-34-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4120-30-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4120-29-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4120-24-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4120-37-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4600-108-0x00000000009B0000-0x0000000000AB0000-memory.dmp

          Filesize

          1024KB

        • memory/4828-127-0x0000000000AC0000-0x0000000000BC0000-memory.dmp

          Filesize

          1024KB

        • memory/4856-17-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4856-6-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4856-5-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4856-4-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4856-3-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB