Analysis

  • max time kernel
    102s
  • max time network
    131s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    30/11/2022, 03:31

General

  • Target
    924cedaa60e2eba5624e7b2cb03f3ff2.exe
  • Size 657KB
  • Sample221130-d22qdsdb34
  • SHA256 61a39dccc9cc27c83552c340c7a862039067f8aed4229261f70fe1c124fc6a10
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • djvu

C2
  • http://fresherlights.com/test1/get.php

Attributes
  • extension

    .uyro

  • offline_id

    HtkmULXEgJoZa495hFUJlvKCD0OwnxklbkoITjt1

  • payload_url

    http://uaery.top/dl/build2.exe

    http://fresherlights.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-5UcwRdS3ED Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. 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: 0609djfsieE

rsa_pubkey.plain

Extracted

Family
  • vidar

Version
  • 56

Botnet
  • 517

C2
  • https://t.me/asifrazatg

  • https://steamcommunity.com/profiles/76561199439929669

Attributes
  • profile_id

    517

Signatures

  • Detected Djvu ransomware 11 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 4 IoCs
  • Loads dropped DLL 6 IoCs
  • Modifies file permissions 1 TTPs 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses 2FA software files, possible credential harvesting 2 TTPs
  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • 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 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Creates scheduled task(s) 1 TTPs 2 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Modifies system certificate store 2 TTPs 8 IoCs
  • Suspicious behavior: EnumeratesProcesses 5 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\924cedaa60e2eba5624e7b2cb03f3ff2.exe
    "C:\Users\Admin\AppData\Local\Temp\924cedaa60e2eba5624e7b2cb03f3ff2.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1900
    • C:\Users\Admin\AppData\Local\Temp\924cedaa60e2eba5624e7b2cb03f3ff2.exe
      "C:\Users\Admin\AppData\Local\Temp\924cedaa60e2eba5624e7b2cb03f3ff2.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:240
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\c0afdd40-2f67-4bbd-a1b6-3915b758f8fa" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:1856
      • C:\Users\Admin\AppData\Local\Temp\924cedaa60e2eba5624e7b2cb03f3ff2.exe
        "C:\Users\Admin\AppData\Local\Temp\924cedaa60e2eba5624e7b2cb03f3ff2.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:616
        • C:\Users\Admin\AppData\Local\Temp\924cedaa60e2eba5624e7b2cb03f3ff2.exe
          "C:\Users\Admin\AppData\Local\Temp\924cedaa60e2eba5624e7b2cb03f3ff2.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Loads dropped DLL
          • Modifies system certificate store
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:1168
          • C:\Users\Admin\AppData\Local\7e8fa0f1-01f8-439d-9e90-5adefb486ee7\build2.exe
            "C:\Users\Admin\AppData\Local\7e8fa0f1-01f8-439d-9e90-5adefb486ee7\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:1492
            • C:\Users\Admin\AppData\Local\7e8fa0f1-01f8-439d-9e90-5adefb486ee7\build2.exe
              "C:\Users\Admin\AppData\Local\7e8fa0f1-01f8-439d-9e90-5adefb486ee7\build2.exe"
              6⤵
              • Executes dropped EXE
              • Loads dropped DLL
              • Checks processor information in registry
              • Modifies system certificate store
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of WriteProcessMemory
              PID:1732
              • C:\Windows\SysWOW64\cmd.exe
                "C:\Windows\System32\cmd.exe" /c timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\7e8fa0f1-01f8-439d-9e90-5adefb486ee7\build2.exe" & exit
                7⤵
                • Suspicious use of WriteProcessMemory
                PID:1504
                • C:\Windows\SysWOW64\timeout.exe
                  timeout /t 6
                  8⤵
                  • Delays execution with timeout.exe
                  PID:1284
          • C:\Users\Admin\AppData\Local\7e8fa0f1-01f8-439d-9e90-5adefb486ee7\build3.exe
            "C:\Users\Admin\AppData\Local\7e8fa0f1-01f8-439d-9e90-5adefb486ee7\build3.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of WriteProcessMemory
            PID:952
            • 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"
              6⤵
              • Creates scheduled task(s)
              PID:996
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {2B9A16A4-2BD7-4A0C-8648-AC25FE504B7F} S-1-5-21-3845472200-3839195424-595303356-1000:ZERMMMDR\Admin:Interactive:[1]
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1876
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      PID:1676
      • 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:1816

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
        • Size 2KB
        • SHA256 280fd6ae3ad21323199759814c4dd82329eb8f9847ed1fa2be145e83b4c88bf3
        • MD5 SHA1 SHA512

        94308059B57B3142E455B38A6EB92015

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015
        • Size 61KB
        • SHA256 10f3deb6c452d749a7451b5d065f4c0449737e5ee8a44f4d15844b503141e65b
        • MD5 SHA1 SHA512 SSDEEP

        B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
        • Size 1KB
        • SHA256 64a36c1637d0a111152002a2c0385b0df9dd81b616b3f2073fbbe3f2975aa4d8
        • MD5 SHA1 SHA512

        F0ACCF77CDCBFF39F6191887F6D2D357

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\F0ACCF77CDCBFF39F6191887F6D2D357
        • Size 1KB
        • SHA256 df545bf919a2439c36983b54cdfc903dfa4f37d3996d8d84b4c31eec6f3c163e
        • MD5 SHA1 SHA512

        07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
        • Size 488B
        • SHA256 5062164391cd0831c56494f11f334663e3a62b22e609eaa0b8edac346f97e12a
        • MD5 SHA1 SHA512

        94308059B57B3142E455B38A6EB92015

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
        • Size 342B
        • SHA256 e2d2b600b069511d3cce4e760f0a7635c2b573429d112ef2f504ea237666531a
        • MD5 SHA1 SHA512

        B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
        • Size 482B
        • SHA256 09dbfbe715af64c54d79aa26387dac7356b377875b9e743f08101a2fcd05524b
        • MD5 SHA1 SHA512

        F0ACCF77CDCBFF39F6191887F6D2D357

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\F0ACCF77CDCBFF39F6191887F6D2D357
        • Size 242B
        • SHA256 1bf409bd342ecbc2fda5ebdf9a0eace908bcfbe0e08356c87742143db5d647f9
        • MD5 SHA1 SHA512

        build2.exe

        • Path C:\Users\Admin\AppData\Local\7e8fa0f1-01f8-439d-9e90-5adefb486ee7\build2.exe
        • Size 258KB
        • SHA256 7a087c1bcd038c61ddb0f634f9b21e6db9bed59842f19adeda48b49acb20e16f
        • MD5 SHA1 SHA512 SSDEEP

        build2.exe

        • Path C:\Users\Admin\AppData\Local\7e8fa0f1-01f8-439d-9e90-5adefb486ee7\build2.exe
        • Size 258KB
        • SHA256 7a087c1bcd038c61ddb0f634f9b21e6db9bed59842f19adeda48b49acb20e16f
        • MD5 SHA1 SHA512 SSDEEP

        build2.exe

        • Path C:\Users\Admin\AppData\Local\7e8fa0f1-01f8-439d-9e90-5adefb486ee7\build2.exe
        • Size 258KB
        • SHA256 7a087c1bcd038c61ddb0f634f9b21e6db9bed59842f19adeda48b49acb20e16f
        • MD5 SHA1 SHA512 SSDEEP

        build3.exe

        • Path C:\Users\Admin\AppData\Local\7e8fa0f1-01f8-439d-9e90-5adefb486ee7\build3.exe
        • Size 9KB
        • SHA256 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
        • MD5 SHA1 SHA512 SSDEEP

        build3.exe

        • Path C:\Users\Admin\AppData\Local\7e8fa0f1-01f8-439d-9e90-5adefb486ee7\build3.exe
        • Size 9KB
        • SHA256 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
        • MD5 SHA1 SHA512 SSDEEP

        924cedaa60e2eba5624e7b2cb03f3ff2.exe

        • Path C:\Users\Admin\AppData\Local\c0afdd40-2f67-4bbd-a1b6-3915b758f8fa\924cedaa60e2eba5624e7b2cb03f3ff2.exe
        • Size 657KB
        • SHA256 61a39dccc9cc27c83552c340c7a862039067f8aed4229261f70fe1c124fc6a10
        • MD5 SHA1 SHA512 SSDEEP

        mstsca.exe

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        • Size 9KB
        • SHA256 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
        • MD5 SHA1 SHA512 SSDEEP

        mstsca.exe

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        • Size 9KB
        • SHA256 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
        • MD5 SHA1 SHA512 SSDEEP

        mozglue.dll

        • Path \ProgramData\mozglue.dll
        • Size 593KB
        • SHA256 ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a
        • MD5 SHA1 SHA512 SSDEEP

        nss3.dll

        • Path \ProgramData\nss3.dll
        • Size 2.0MB
        • SHA256 ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5
        • MD5 SHA1 SHA512 SSDEEP

        build2.exe

        • Path \Users\Admin\AppData\Local\7e8fa0f1-01f8-439d-9e90-5adefb486ee7\build2.exe
        • Size 258KB
        • SHA256 7a087c1bcd038c61ddb0f634f9b21e6db9bed59842f19adeda48b49acb20e16f
        • MD5 SHA1 SHA512 SSDEEP

        build2.exe

        • Path \Users\Admin\AppData\Local\7e8fa0f1-01f8-439d-9e90-5adefb486ee7\build2.exe
        • Size 258KB
        • SHA256 7a087c1bcd038c61ddb0f634f9b21e6db9bed59842f19adeda48b49acb20e16f
        • MD5 SHA1 SHA512 SSDEEP

        build3.exe

        • Path \Users\Admin\AppData\Local\7e8fa0f1-01f8-439d-9e90-5adefb486ee7\build3.exe
        • Size 9KB
        • SHA256 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
        • MD5 SHA1 SHA512 SSDEEP

        build3.exe

        • Path \Users\Admin\AppData\Local\7e8fa0f1-01f8-439d-9e90-5adefb486ee7\build3.exe
        • Size 9KB
        • SHA256 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
        • MD5 SHA1 SHA512 SSDEEP

        memory/240-60-0x0000000074AB1000-0x0000000074AB3000-memory.dmp

        memory/240-61-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/240-62-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/240-55-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/240-65-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/240-67-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/616-68-0x0000000000520000-0x00000000005B1000-memory.dmp

        memory/616-72-0x0000000000520000-0x00000000005B1000-memory.dmp

        memory/1168-74-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1168-128-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1168-81-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1492-99-0x00000000003A0000-0x00000000003EB000-memory.dmp

        memory/1732-95-0x0000000000400000-0x000000000045F000-memory.dmp

        memory/1732-105-0x0000000061E00000-0x0000000061EF3000-memory.dmp

        memory/1732-126-0x0000000000400000-0x000000000045F000-memory.dmp

        memory/1732-104-0x0000000000400000-0x000000000045F000-memory.dmp

        memory/1732-100-0x0000000000400000-0x000000000045F000-memory.dmp

        memory/1900-59-0x0000000001F00000-0x000000000201B000-memory.dmp

        memory/1900-58-0x0000000000310000-0x00000000003A1000-memory.dmp

        memory/1900-54-0x0000000000310000-0x00000000003A1000-memory.dmp