Analysis

  • max time kernel
    297s
  • max time network
    297s
  • 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, 04:50

General

  • Target
    4b9684e393bcb5fb779b00fd025100bca7582a89858ce9344926ff7e3206b90b.exe
  • Size 758KB
  • Sample240115-fgplfahfdm
  • SHA256 4b9684e393bcb5fb779b00fd025100bca7582a89858ce9344926ff7e3206b90b
  • MD5 SHA1 SHA512 SSDEEP

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

  • Detect Vidar Stealer 5 IoCs
  • Detected Djvu ransomware 16 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 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).

  • Program crash 1 IoCs
  • 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\4b9684e393bcb5fb779b00fd025100bca7582a89858ce9344926ff7e3206b90b.exe
    "C:\Users\Admin\AppData\Local\Temp\4b9684e393bcb5fb779b00fd025100bca7582a89858ce9344926ff7e3206b90b.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3964
    • C:\Users\Admin\AppData\Local\Temp\4b9684e393bcb5fb779b00fd025100bca7582a89858ce9344926ff7e3206b90b.exe
      "C:\Users\Admin\AppData\Local\Temp\4b9684e393bcb5fb779b00fd025100bca7582a89858ce9344926ff7e3206b90b.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4380
      • C:\Users\Admin\AppData\Local\Temp\4b9684e393bcb5fb779b00fd025100bca7582a89858ce9344926ff7e3206b90b.exe
        "C:\Users\Admin\AppData\Local\Temp\4b9684e393bcb5fb779b00fd025100bca7582a89858ce9344926ff7e3206b90b.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:392
        • C:\Users\Admin\AppData\Local\Temp\4b9684e393bcb5fb779b00fd025100bca7582a89858ce9344926ff7e3206b90b.exe
          "C:\Users\Admin\AppData\Local\Temp\4b9684e393bcb5fb779b00fd025100bca7582a89858ce9344926ff7e3206b90b.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:2208
          • C:\Users\Admin\AppData\Local\43dc69ed-a7e7-4b72-b970-0ac4f7cd5e20\build2.exe
            "C:\Users\Admin\AppData\Local\43dc69ed-a7e7-4b72-b970-0ac4f7cd5e20\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:3608
          • C:\Users\Admin\AppData\Local\43dc69ed-a7e7-4b72-b970-0ac4f7cd5e20\build3.exe
            "C:\Users\Admin\AppData\Local\43dc69ed-a7e7-4b72-b970-0ac4f7cd5e20\build3.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:4956
            • C:\Users\Admin\AppData\Local\43dc69ed-a7e7-4b72-b970-0ac4f7cd5e20\build3.exe
              "C:\Users\Admin\AppData\Local\43dc69ed-a7e7-4b72-b970-0ac4f7cd5e20\build3.exe"
              6⤵
              • Executes dropped EXE
              • Suspicious use of WriteProcessMemory
              PID:4812
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\481c7f21-ac5d-4aee-9a51-ecfd664acf58" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:3348
  • C:\Users\Admin\AppData\Local\43dc69ed-a7e7-4b72-b970-0ac4f7cd5e20\build2.exe
    "C:\Users\Admin\AppData\Local\43dc69ed-a7e7-4b72-b970-0ac4f7cd5e20\build2.exe"
    1⤵
    • Executes dropped EXE
    PID:4496
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4496 -s 1912
      2⤵
      • Program crash
      PID:4540
  • 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"
    1⤵
    • Creates scheduled task(s)
    PID:324
  • 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:4308
    • 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:2204
      • 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:1740
  • 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:96
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      PID:1020
  • 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:3628
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      PID:4148
  • 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:3668
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      PID:1748

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
        • Size 1KB
        • SHA256 ee8aeed77dd9f1631fa75845214d75bfe04951a61892410ee369035e13fd14c6
        • MD5 SHA1 SHA512

        CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
        • Size 724B
        • SHA256 58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
        • MD5 SHA1 SHA512

        24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
        • Size 410B
        • SHA256 6052c2033ea485747a9d906774377480aa2d85fe53b578bdc23f37972615589c
        • MD5 SHA1 SHA512

        CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
        • Size 392B
        • SHA256 1035557e733a31dedccc5d68cb68367f11325673022271d8c182f1478965534d
        • MD5 SHA1 SHA512

        build2.exe

        • Path C:\Users\Admin\AppData\Local\43dc69ed-a7e7-4b72-b970-0ac4f7cd5e20\build2.exe
        • Size 265KB
        • SHA256 6abf8996220322e769a32b379e1a7d01023d56fd5a28a70c12d37bc74e8e0268
        • MD5 SHA1 SHA512 SSDEEP

        build2.exe

        • Path C:\Users\Admin\AppData\Local\43dc69ed-a7e7-4b72-b970-0ac4f7cd5e20\build2.exe
        • Size 295KB
        • SHA256 85dbb98e4407e2bf45898c3b7c2fb1fcf7a956a3a215743f30e1b34cf0fef3bc
        • MD5 SHA1 SHA512 SSDEEP

        build2.exe

        • Path C:\Users\Admin\AppData\Local\43dc69ed-a7e7-4b72-b970-0ac4f7cd5e20\build2.exe
        • Size 275KB
        • SHA256 63aef04f516b8815d7b5cc18d6b41554f0f5aee68c7ee1822fe3951b1b7187a1
        • MD5 SHA1 SHA512 SSDEEP

        build3.exe

        • Path C:\Users\Admin\AppData\Local\43dc69ed-a7e7-4b72-b970-0ac4f7cd5e20\build3.exe
        • Size 29KB
        • SHA256 c9dde988a40e970985fa1fb9b7290dbf660183671beeb2283589d25a2e103f1e
        • MD5 SHA1 SHA512 SSDEEP

        build3.exe

        • Path C:\Users\Admin\AppData\Local\43dc69ed-a7e7-4b72-b970-0ac4f7cd5e20\build3.exe
        • Size 5KB
        • SHA256 73e41876c3fdb962cd993c53d72b055fd7554669bfa8a9ed0de2621cf92f6052
        • MD5 SHA1 SHA512 SSDEEP

        build3.exe

        • Path C:\Users\Admin\AppData\Local\43dc69ed-a7e7-4b72-b970-0ac4f7cd5e20\build3.exe
        • Size 109KB
        • SHA256 ccb892eb37e550e3f37adb6a5c0b92b1eede723849119fbf1cf8a32acee6085b
        • MD5 SHA1 SHA512 SSDEEP

        4b9684e393bcb5fb779b00fd025100bca7582a89858ce9344926ff7e3206b90b.exe

        • Path C:\Users\Admin\AppData\Local\481c7f21-ac5d-4aee-9a51-ecfd664acf58\4b9684e393bcb5fb779b00fd025100bca7582a89858ce9344926ff7e3206b90b.exe
        • Size 116KB
        • SHA256 ffdb53d1a7b69bd2446cc68e43d2ef550087233baaf7e6fcbd38bf636ea2c97c
        • MD5 SHA1 SHA512 SSDEEP

        mstsca.exe

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        • Size 225KB
        • SHA256 7d11d5a5e60feba709e691f4399b833fafb20dffd6ca21ea6bc9790f25341906
        • MD5 SHA1 SHA512 SSDEEP

        mstsca.exe

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        • Size 101KB
        • SHA256 d7d0b766719ab9f192026d7bc2113a4e27648b07e8e274445b225545b57009c1
        • MD5 SHA1 SHA512 SSDEEP

        mstsca.exe

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        • Size 47KB
        • SHA256 8d5f08c10710f2e7911ef2f6d841810d8bfb498f0ec94935d2434113a983bdb4
        • MD5 SHA1 SHA512 SSDEEP

        mstsca.exe

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        • Size 29KB
        • SHA256 f35c83a16eea9da526472d30e4075443134876b979bd3ab22aae89158e999fb3
        • MD5 SHA1 SHA512 SSDEEP

        mstsca.exe

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        • Size 299KB
        • SHA256 fef2c8ca07c500e416fd7700a381c39899ee26ce1119f62e7c65cf922ce8b408
        • MD5 SHA1 SHA512 SSDEEP

        memory/96-124-0x0000000000AAE000-0x0000000000ABE000-memory.dmp

        memory/392-20-0x0000000000530000-0x00000000005C7000-memory.dmp

        memory/1020-127-0x0000000000410000-0x00000000004D5000-memory.dmp

        memory/2208-63-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2208-29-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2208-23-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2208-22-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2208-30-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2208-34-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2208-24-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2208-37-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2208-36-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2208-54-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3608-50-0x00000000005C0000-0x000000000060B000-memory.dmp

        memory/3608-49-0x0000000000620000-0x0000000000720000-memory.dmp

        memory/3628-151-0x0000000000940000-0x0000000000A40000-memory.dmp

        memory/3668-178-0x0000000000B10000-0x0000000000C10000-memory.dmp

        memory/3964-4-0x0000000002280000-0x000000000239B000-memory.dmp

        memory/3964-66-0x0000000002280000-0x000000000239B000-memory.dmp

        memory/3964-3-0x00000000021D0000-0x0000000002270000-memory.dmp

        memory/4308-102-0x000000000092A000-0x000000000093A000-memory.dmp

        memory/4380-17-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4380-5-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4380-2-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4380-1-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4380-6-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4496-52-0x0000000000400000-0x000000000065E000-memory.dmp

        memory/4496-67-0x0000000000400000-0x000000000065E000-memory.dmp

        memory/4496-46-0x0000000000400000-0x000000000065E000-memory.dmp

        memory/4496-51-0x0000000000400000-0x000000000065E000-memory.dmp

        memory/4812-71-0x0000000000400000-0x0000000000406000-memory.dmp

        memory/4812-76-0x0000000000400000-0x0000000000406000-memory.dmp

        memory/4812-79-0x0000000000400000-0x0000000000406000-memory.dmp

        memory/4956-77-0x0000000000810000-0x0000000000814000-memory.dmp

        memory/4956-74-0x0000000000879000-0x000000000088A000-memory.dmp