Analysis

  • max time kernel
    299s
  • max time network
    293s
  • platform
    windows10-1703_x64
  • resource
    win10-20231220-en
  • resource tags

    arch:x64arch:x86image:win10-20231220-enlocale:en-usos:windows10-1703-x64system
  • submitted
    15/01/2024, 04:49

General

  • Target

    2976b9cc47bd3854337e3653128eec2ac18da76a93941b5cc0becd0ba4926470.exe

  • Size

    845KB

  • MD5

    b8b236e9fab508d1ed85fc4ad0843ef5

  • SHA1

    4366140de33fd27603f8aeb5f26d395e5d9a51c8

  • SHA256

    2976b9cc47bd3854337e3653128eec2ac18da76a93941b5cc0becd0ba4926470

  • SHA512

    fdb986be769977940c551d0d331c903879761802555fd8df9b82cc9740e28d8bbced1955bd786bee268e2bb4b3734e4ac415b29bcbf5da806b5095beb85c0f74

  • SSDEEP

    12288:slu4ya2xb/wGoF2YgLiGVC6q4ddtrRjmg8WW8GyeK7rX4IreBEM1/hjxq9:l464ZFHTGg6FxrFx8PyeK7rX86Aa9

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 17 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Downloads MZ/PE file
  • Executes dropped EXE 10 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 7 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\2976b9cc47bd3854337e3653128eec2ac18da76a93941b5cc0becd0ba4926470.exe
    "C:\Users\Admin\AppData\Local\Temp\2976b9cc47bd3854337e3653128eec2ac18da76a93941b5cc0becd0ba4926470.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3352
    • C:\Users\Admin\AppData\Local\Temp\2976b9cc47bd3854337e3653128eec2ac18da76a93941b5cc0becd0ba4926470.exe
      "C:\Users\Admin\AppData\Local\Temp\2976b9cc47bd3854337e3653128eec2ac18da76a93941b5cc0becd0ba4926470.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4776
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\f9a45bb9-2be0-4b26-8abb-729ebfc89b89" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:200
      • C:\Users\Admin\AppData\Local\Temp\2976b9cc47bd3854337e3653128eec2ac18da76a93941b5cc0becd0ba4926470.exe
        "C:\Users\Admin\AppData\Local\Temp\2976b9cc47bd3854337e3653128eec2ac18da76a93941b5cc0becd0ba4926470.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1652
        • C:\Users\Admin\AppData\Local\Temp\2976b9cc47bd3854337e3653128eec2ac18da76a93941b5cc0becd0ba4926470.exe
          "C:\Users\Admin\AppData\Local\Temp\2976b9cc47bd3854337e3653128eec2ac18da76a93941b5cc0becd0ba4926470.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:4648
          • C:\Users\Admin\AppData\Local\3ec478c9-37a8-4dc3-a57c-ea8e24d8973c\build3.exe
            "C:\Users\Admin\AppData\Local\3ec478c9-37a8-4dc3-a57c-ea8e24d8973c\build3.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:2720
            • C:\Users\Admin\AppData\Local\3ec478c9-37a8-4dc3-a57c-ea8e24d8973c\build3.exe
              "C:\Users\Admin\AppData\Local\3ec478c9-37a8-4dc3-a57c-ea8e24d8973c\build3.exe"
              6⤵
              • Executes dropped EXE
              • Suspicious use of WriteProcessMemory
              PID:1256
              • 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:3192
  • 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:2844
    • 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:2308
      • 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:4724
  • 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:2412
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      PID:4272
  • 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:1884
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      PID:2956
  • 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:5056
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      PID:1184

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

          d4de3ad1154ecca1283bfbbbb10e8048

          SHA1

          db2ac46ef1b0b060582deab0153e4de455c9b892

          SHA256

          de65e26e8b0a9f86d94f13847219257bf2d7f124fd5885c4a5cf39ab7ba3e785

          SHA512

          1e911a0b12395be3b2a53938d1753eb667a7d836d828d13a91e5f43cb70962cf68246770b57e7214ebfeada9bd5345a12b82adacae6416e6bf18680c7f2c645d

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

          Filesize

          392B

          MD5

          c59cab556400eb40ceac32fe0115c947

          SHA1

          47ceb44cb24bba7eeb30ae84781e08ae7c857050

          SHA256

          7d7035b101b9ce7d06486aeb8b9e8d18c42256a05c877862126aaffb9aeb22d9

          SHA512

          c95d433d0bc30d9112f5002ed0083cb8283181ecae5ce8d10784248e6b0489cf8c8a406c019d84ea54f78f6cd5100a2e2fbc67703141039a108da27f77d512f6

        • C:\Users\Admin\AppData\Local\3ec478c9-37a8-4dc3-a57c-ea8e24d8973c\build3.exe

          Filesize

          5KB

          MD5

          56d345a1f005ed14beb5477502cd93b2

          SHA1

          f070b5d8c2d986e2ba96cba32486fe75c9914a5f

          SHA256

          f020e2b0651312065af61565a18f24776d4952a83dbb654cb8a2894a82ca11ab

          SHA512

          5ea8f03e0283f14e51065b9a3fd20b2af7a98857e4744ac29096d1e4ee46c0bd2e0e093a1cc91801b0b7d3547cf71b948a03ae3e972dbd4b39cd5afffa7bd184

        • C:\Users\Admin\AppData\Local\3ec478c9-37a8-4dc3-a57c-ea8e24d8973c\build3.exe

          Filesize

          299KB

          MD5

          41b883a061c95e9b9cb17d4ca50de770

          SHA1

          1daf96ec21d53d9a4699cea9b4db08cda6fbb5ad

          SHA256

          fef2c8ca07c500e416fd7700a381c39899ee26ce1119f62e7c65cf922ce8b408

          SHA512

          cdd1bb3a36182575cd715a52815765161eeaa3849e72c1c2a9a4e84cc43af9f8ec4997e642702bb3de41f162d2e8fd8717f6f8302bba5306821ee4d155626319

        • C:\Users\Admin\AppData\Local\f9a45bb9-2be0-4b26-8abb-729ebfc89b89\2976b9cc47bd3854337e3653128eec2ac18da76a93941b5cc0becd0ba4926470.exe

          Filesize

          845KB

          MD5

          b8b236e9fab508d1ed85fc4ad0843ef5

          SHA1

          4366140de33fd27603f8aeb5f26d395e5d9a51c8

          SHA256

          2976b9cc47bd3854337e3653128eec2ac18da76a93941b5cc0becd0ba4926470

          SHA512

          fdb986be769977940c551d0d331c903879761802555fd8df9b82cc9740e28d8bbced1955bd786bee268e2bb4b3734e4ac415b29bcbf5da806b5095beb85c0f74

        • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe

          Filesize

          108KB

          MD5

          a4f6fffee96cda7a29579017f0899c64

          SHA1

          820e654a00474dfe1dede7cd921ce192310d1fa1

          SHA256

          2325159cd56f70a1b3eccb1b31b0c803a8e49430b62b39efafa744b805ae1467

          SHA512

          7c1c0d087cecb38d9b0a8a372caffc3375e95b47ae46e344c2712e386a0899326304c940e535b14e219348f25a1351bd2a020d96ba08faa0976cdc69d19647dd

        • memory/1256-56-0x0000000000400000-0x0000000000406000-memory.dmp

          Filesize

          24KB

        • memory/1256-58-0x0000000000410000-0x00000000004D5000-memory.dmp

          Filesize

          788KB

        • memory/1256-55-0x0000000000400000-0x0000000000406000-memory.dmp

          Filesize

          24KB

        • memory/1256-50-0x0000000000400000-0x0000000000406000-memory.dmp

          Filesize

          24KB

        • memory/1652-20-0x00000000009F0000-0x0000000000A92000-memory.dmp

          Filesize

          648KB

        • memory/1884-114-0x000000000098E000-0x000000000099E000-memory.dmp

          Filesize

          64KB

        • memory/2412-95-0x000000000084E000-0x000000000085E000-memory.dmp

          Filesize

          64KB

        • memory/2720-53-0x0000000000AE9000-0x0000000000AFA000-memory.dmp

          Filesize

          68KB

        • memory/2720-54-0x0000000000A30000-0x0000000000A34000-memory.dmp

          Filesize

          16KB

        • memory/2844-76-0x0000000000B1A000-0x0000000000B2A000-memory.dmp

          Filesize

          64KB

        • memory/3352-1-0x0000000002530000-0x00000000025CE000-memory.dmp

          Filesize

          632KB

        • memory/3352-3-0x0000000002670000-0x000000000278B000-memory.dmp

          Filesize

          1.1MB

        • memory/4648-24-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4648-29-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4648-34-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4648-37-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4648-45-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4648-36-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4648-30-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4648-41-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4648-22-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4648-23-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4776-17-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4776-6-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4776-5-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4776-4-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4776-2-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/5056-137-0x0000000000A40000-0x0000000000B40000-memory.dmp

          Filesize

          1024KB