Analysis

  • max time kernel
    299s
  • max time network
    301s
  • 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, 22:20

General

  • Target
    5204ea509328d2ce79d99a88758e45e8757bc9171abfc4577087b456ae9d7961.exe
  • Size 867KB
  • Sample240128-19fjfsbda9
  • SHA256 5204ea509328d2ce79d99a88758e45e8757bc9171abfc4577087b456ae9d7961
  • 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 9 IoCs
  • Detected Djvu ransomware 18 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\5204ea509328d2ce79d99a88758e45e8757bc9171abfc4577087b456ae9d7961.exe
    "C:\Users\Admin\AppData\Local\Temp\5204ea509328d2ce79d99a88758e45e8757bc9171abfc4577087b456ae9d7961.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1116
    • C:\Users\Admin\AppData\Local\Temp\5204ea509328d2ce79d99a88758e45e8757bc9171abfc4577087b456ae9d7961.exe
      "C:\Users\Admin\AppData\Local\Temp\5204ea509328d2ce79d99a88758e45e8757bc9171abfc4577087b456ae9d7961.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2268
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\60da488e-a433-4046-b9ab-67c8be62a87f" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:1192
      • C:\Users\Admin\AppData\Local\Temp\5204ea509328d2ce79d99a88758e45e8757bc9171abfc4577087b456ae9d7961.exe
        "C:\Users\Admin\AppData\Local\Temp\5204ea509328d2ce79d99a88758e45e8757bc9171abfc4577087b456ae9d7961.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4172
        • C:\Users\Admin\AppData\Local\Temp\5204ea509328d2ce79d99a88758e45e8757bc9171abfc4577087b456ae9d7961.exe
          "C:\Users\Admin\AppData\Local\Temp\5204ea509328d2ce79d99a88758e45e8757bc9171abfc4577087b456ae9d7961.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:4876
          • C:\Users\Admin\AppData\Local\a41a443d-79f1-4958-9939-82d902e56464\build2.exe
            "C:\Users\Admin\AppData\Local\a41a443d-79f1-4958-9939-82d902e56464\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:4980
            • C:\Users\Admin\AppData\Local\a41a443d-79f1-4958-9939-82d902e56464\build2.exe
              "C:\Users\Admin\AppData\Local\a41a443d-79f1-4958-9939-82d902e56464\build2.exe"
              6⤵
              • Executes dropped EXE
              PID:4440
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 4440 -s 1912
                7⤵
                • Program crash
                PID:4228
          • C:\Users\Admin\AppData\Local\a41a443d-79f1-4958-9939-82d902e56464\build3.exe
            "C:\Users\Admin\AppData\Local\a41a443d-79f1-4958-9939-82d902e56464\build3.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:3348
            • C:\Users\Admin\AppData\Local\a41a443d-79f1-4958-9939-82d902e56464\build3.exe
              "C:\Users\Admin\AppData\Local\a41a443d-79f1-4958-9939-82d902e56464\build3.exe"
              6⤵
              • Executes dropped EXE
              • Suspicious use of WriteProcessMemory
              PID:1412
              • 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:692
  • 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:4780
    • 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:980
      • 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:600
  • 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:3752
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      PID:3396
  • 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:4728
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      PID:3368
  • 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:4484
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      PID:1440
  • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    1⤵
    • Executes dropped EXE
    PID:404

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 16e79dd630b43d54acd6e59dd80c477d8b5ddab75bd4c31d9180b6998c713695
        • MD5 SHA1 SHA512

        CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
        • Size 392B
        • SHA256 d6e3cb1259cf439ed91142c01d29e58130b0cc88a344eb5759aaf434c35ac82b
        • MD5 SHA1 SHA512

        5204ea509328d2ce79d99a88758e45e8757bc9171abfc4577087b456ae9d7961.exe

        • Path C:\Users\Admin\AppData\Local\60da488e-a433-4046-b9ab-67c8be62a87f\5204ea509328d2ce79d99a88758e45e8757bc9171abfc4577087b456ae9d7961.exe
        • Size 153KB
        • SHA256 ccf423f48848816fe241a80d550b4aa4644644491d0cb64be0b5f7b6123ecfc4
        • MD5 SHA1 SHA512 SSDEEP

        build2.exe

        • Path C:\Users\Admin\AppData\Local\a41a443d-79f1-4958-9939-82d902e56464\build2.exe
        • Size 253KB
        • SHA256 548b46557fb39c9fe32881c8b096cda223cbc97aaa8c510c5930f8d9c179ddb7
        • MD5 SHA1 SHA512 SSDEEP

        build2.exe

        • Path C:\Users\Admin\AppData\Local\a41a443d-79f1-4958-9939-82d902e56464\build2.exe
        • Size 64KB
        • SHA256 7ee74f0e3f950f154cbddcac719b8501899426e50d4def9ed2c7cc459a4bed91
        • MD5 SHA1 SHA512 SSDEEP

        build2.exe

        • Path C:\Users\Admin\AppData\Local\a41a443d-79f1-4958-9939-82d902e56464\build2.exe
        • Size 68KB
        • SHA256 d23c38194fe82f9e1ecb79a3eb9b73dd10f2a84fe411ccfeda6ae97d4e432b47
        • MD5 SHA1 SHA512 SSDEEP

        build3.exe

        • Path C:\Users\Admin\AppData\Local\a41a443d-79f1-4958-9939-82d902e56464\build3.exe
        • Size 299KB
        • SHA256 fef2c8ca07c500e416fd7700a381c39899ee26ce1119f62e7c65cf922ce8b408
        • MD5 SHA1 SHA512 SSDEEP

        mstsca.exe

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        • Size 241KB
        • SHA256 166fcef6d16eb35d1252bd7abde55a04074667043253a539928096c93dfe80c7
        • MD5 SHA1 SHA512 SSDEEP

        mstsca.exe

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        • Size 19KB
        • SHA256 0eb48334567323a7f79bcf60b91acb1c507cfc508dcbc501a354df2763e7ed7e
        • MD5 SHA1 SHA512 SSDEEP

        memory/1116-1-0x0000000000790000-0x0000000000831000-memory.dmp

        memory/1116-2-0x0000000002200000-0x000000000231B000-memory.dmp

        memory/1412-79-0x0000000000400000-0x0000000000406000-memory.dmp

        memory/1412-80-0x0000000000400000-0x0000000000406000-memory.dmp

        memory/1412-76-0x0000000000400000-0x0000000000406000-memory.dmp

        memory/2268-17-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2268-6-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2268-5-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2268-4-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2268-3-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3348-75-0x00000000007F0000-0x00000000007F4000-memory.dmp

        memory/3348-74-0x0000000000800000-0x0000000000900000-memory.dmp

        memory/3752-128-0x00000000009F0000-0x0000000000AF0000-memory.dmp

        memory/4172-20-0x0000000001FF0000-0x0000000002087000-memory.dmp

        memory/4440-66-0x0000000000400000-0x000000000063F000-memory.dmp

        memory/4440-46-0x0000000000400000-0x000000000063F000-memory.dmp

        memory/4440-51-0x0000000000400000-0x000000000063F000-memory.dmp

        memory/4440-52-0x0000000000400000-0x000000000063F000-memory.dmp

        memory/4484-179-0x00000000007F0000-0x00000000008F0000-memory.dmp

        memory/4728-151-0x00000000009F0000-0x0000000000AF0000-memory.dmp

        memory/4780-100-0x0000000000800000-0x0000000000900000-memory.dmp

        memory/4876-62-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4876-30-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4876-29-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4876-24-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4876-22-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4876-37-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4876-36-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4876-34-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4876-23-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4876-56-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4980-48-0x00000000005D0000-0x00000000005FC000-memory.dmp

        memory/4980-47-0x0000000000660000-0x0000000000760000-memory.dmp