Analysis

  • max time kernel
    299s
  • max time network
    300s
  • platform
    windows10-1703_x64
  • resource
    win10-20231215-en
  • resource tags

    arch:x64arch:x86image:win10-20231215-enlocale:en-usos:windows10-1703-x64system
  • submitted
    28/01/2024, 22:23

General

  • Target
    8f626406f99135b40421e3fba47eff26e1b9c6082860c6824448da00d352cf9e.exe
  • Size 736KB
  • Sample240128-2bae8abdh4
  • SHA256 8f626406f99135b40421e3fba47eff26e1b9c6082860c6824448da00d352cf9e
  • 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

Extracted

Family
  • vidar

Version
  • 7.5

Botnet
  • e7447dc405edc4690f5920bdb056364f

C2
  • https://t.me/bogotatg

  • https://steamcommunity.com/profiles/76561199621829149

Attributes
  • profile_id_v2

    e7447dc405edc4690f5920bdb056364f

  • user_agent

    Mozilla/5.0 (Macintosh; Intel Mac OS X 11_3) Chrome/90.0.4430.93 Safari/537.36 Vivaldi/3.7

Signatures

  • Detect Vidar Stealer 7 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 13 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\8f626406f99135b40421e3fba47eff26e1b9c6082860c6824448da00d352cf9e.exe
    "C:\Users\Admin\AppData\Local\Temp\8f626406f99135b40421e3fba47eff26e1b9c6082860c6824448da00d352cf9e.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:748
    • C:\Users\Admin\AppData\Local\Temp\8f626406f99135b40421e3fba47eff26e1b9c6082860c6824448da00d352cf9e.exe
      "C:\Users\Admin\AppData\Local\Temp\8f626406f99135b40421e3fba47eff26e1b9c6082860c6824448da00d352cf9e.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4360
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\b93f7514-6113-4ade-9157-88c1d97f6c4e" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:1060
      • C:\Users\Admin\AppData\Local\Temp\8f626406f99135b40421e3fba47eff26e1b9c6082860c6824448da00d352cf9e.exe
        "C:\Users\Admin\AppData\Local\Temp\8f626406f99135b40421e3fba47eff26e1b9c6082860c6824448da00d352cf9e.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4932
        • C:\Users\Admin\AppData\Local\Temp\8f626406f99135b40421e3fba47eff26e1b9c6082860c6824448da00d352cf9e.exe
          "C:\Users\Admin\AppData\Local\Temp\8f626406f99135b40421e3fba47eff26e1b9c6082860c6824448da00d352cf9e.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:5060
          • C:\Users\Admin\AppData\Local\b200c048-9e46-4475-9491-69d041986d81\build2.exe
            "C:\Users\Admin\AppData\Local\b200c048-9e46-4475-9491-69d041986d81\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:4764
            • C:\Users\Admin\AppData\Local\b200c048-9e46-4475-9491-69d041986d81\build2.exe
              "C:\Users\Admin\AppData\Local\b200c048-9e46-4475-9491-69d041986d81\build2.exe"
              6⤵
              • Executes dropped EXE
              PID:4944
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 4944 -s 1904
                7⤵
                • Program crash
                PID:2852
          • C:\Users\Admin\AppData\Local\b200c048-9e46-4475-9491-69d041986d81\build3.exe
            "C:\Users\Admin\AppData\Local\b200c048-9e46-4475-9491-69d041986d81\build3.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:1212
            • C:\Users\Admin\AppData\Local\b200c048-9e46-4475-9491-69d041986d81\build3.exe
              "C:\Users\Admin\AppData\Local\b200c048-9e46-4475-9491-69d041986d81\build3.exe"
              6⤵
              • Executes dropped EXE
              • Suspicious use of WriteProcessMemory
              PID:3584
              • 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:3812
  • 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:2260
    • 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:920
  • 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:5028
  • 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:2240
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      PID:4256
  • 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:4364
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      PID:3128
  • 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:1576
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      PID:3180
  • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    1⤵
    • Executes dropped EXE
    PID:4596

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 c5dff2b8854fb9ed981ebdb1d6b621cf681bd1ac18ac44b14c138cd05352365b
        • 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 8afcd84f2386cc68f2f3e2ca69f34337fc732f7ba81f502ad6760cdc7728925c
        • MD5 SHA1 SHA512

        CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
        • Size 392B
        • SHA256 f6830a73dd6e59d6e21ee38da6659ad1fbf5824b222b56940f653be90d492b87
        • MD5 SHA1 SHA512

        build2.exe

        • Path C:\Users\Admin\AppData\Local\b200c048-9e46-4475-9491-69d041986d81\build2.exe
        • Size 262KB
        • SHA256 1ae4509fb8949fab80d4cc0fefec087af17e7c5654f2a66ac04f7372edaec5fe
        • MD5 SHA1 SHA512 SSDEEP

        build2.exe

        • Path C:\Users\Admin\AppData\Local\b200c048-9e46-4475-9491-69d041986d81\build2.exe
        • Size 155KB
        • SHA256 93f70d2c7374df771b64200f748ac4c4cb845ecdd2d8e9a7ee0ad93faee1acad
        • MD5 SHA1 SHA512 SSDEEP

        build2.exe

        • Path C:\Users\Admin\AppData\Local\b200c048-9e46-4475-9491-69d041986d81\build2.exe
        • Size 70KB
        • SHA256 6a964f888ddd87b0c2eee123af689689470df7e7d25d36d706f2cb116e00b6af
        • MD5 SHA1 SHA512 SSDEEP

        build3.exe

        • Path C:\Users\Admin\AppData\Local\b200c048-9e46-4475-9491-69d041986d81\build3.exe
        • Size 299KB
        • SHA256 fef2c8ca07c500e416fd7700a381c39899ee26ce1119f62e7c65cf922ce8b408
        • MD5 SHA1 SHA512 SSDEEP

        8f626406f99135b40421e3fba47eff26e1b9c6082860c6824448da00d352cf9e.exe

        • Path C:\Users\Admin\AppData\Local\b93f7514-6113-4ade-9157-88c1d97f6c4e\8f626406f99135b40421e3fba47eff26e1b9c6082860c6824448da00d352cf9e.exe
        • Size 685KB
        • SHA256 b2644c992f8d45c20d5f7a9006bdc7bf8e8300a817c80d7d3fd1cb12e4a69e57
        • MD5 SHA1 SHA512 SSDEEP

        mstsca.exe

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        • Size 10KB
        • SHA256 7308cd91591a7fe727870bd4bb0b2fc85518ef1539dc6382d337be994cf076fd
        • MD5 SHA1 SHA512 SSDEEP

        mstsca.exe

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        • Size 140KB
        • SHA256 f8229fa6707eba6d8c5479f99f6074b6ceb5deccf595dbd9033151208649b207
        • MD5 SHA1 SHA512 SSDEEP

        mstsca.exe

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        • Size 73KB
        • SHA256 97e37d9581f1de9a8e450ca4b2b4c7c6d00713e1c08220168d17c9c6822aa1e8
        • MD5 SHA1 SHA512 SSDEEP

        mstsca.exe

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        • Size 244KB
        • SHA256 c2a2f4f7dcb1203cca755cdf3e812d263365b0df6fd0057581ebe094ab968bf0
        • MD5 SHA1 SHA512 SSDEEP

        memory/748-2-0x0000000000AB0000-0x0000000000B4B000-memory.dmp

        memory/748-66-0x00000000025A0000-0x00000000026BB000-memory.dmp

        memory/748-4-0x00000000025A0000-0x00000000026BB000-memory.dmp

        memory/1212-72-0x0000000000A20000-0x0000000000B20000-memory.dmp

        memory/1212-74-0x0000000000810000-0x0000000000814000-memory.dmp

        memory/1576-180-0x0000000000A0E000-0x0000000000A1E000-memory.dmp

        memory/2240-123-0x000000000093E000-0x000000000094E000-memory.dmp

        memory/2260-99-0x0000000000829000-0x0000000000839000-memory.dmp

        memory/3584-78-0x0000000000400000-0x0000000000406000-memory.dmp

        memory/3584-76-0x0000000000400000-0x0000000000406000-memory.dmp

        memory/3584-71-0x0000000000400000-0x0000000000406000-memory.dmp

        memory/4360-6-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4360-5-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4360-3-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4360-1-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4360-17-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4364-148-0x0000000000920000-0x0000000000A20000-memory.dmp

        memory/4764-48-0x00000000005A0000-0x00000000005CC000-memory.dmp

        memory/4764-47-0x0000000000830000-0x0000000000930000-memory.dmp

        memory/4932-20-0x0000000000B70000-0x0000000000C03000-memory.dmp

        memory/4944-52-0x0000000000400000-0x000000000063F000-memory.dmp

        memory/4944-53-0x0000000000400000-0x000000000063F000-memory.dmp

        memory/4944-67-0x0000000000400000-0x000000000063F000-memory.dmp

        memory/4944-49-0x0000000000400000-0x000000000063F000-memory.dmp

        memory/5060-36-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/5060-38-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/5060-34-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/5060-60-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/5060-37-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/5060-30-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/5060-29-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/5060-22-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/5060-24-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/5060-23-0x0000000000400000-0x0000000000537000-memory.dmp