Analysis

  • max time kernel
    65s
  • max time network
    146s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18/10/2022, 18:05

General

  • Target
    ca8a2770828d6c660dd6144ad0a989011ba43b753a8eeb83160608b95bc4fd67.exe
  • Size 716KB
  • Sample221018-wpghssghbk
  • SHA256 ca8a2770828d6c660dd6144ad0a989011ba43b753a8eeb83160608b95bc4fd67
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • djvu

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

Attributes
  • extension

    .tuis

  • offline_id

    Uz66zEbmA32arcxwT81zZhkb23026oHz5iSp8qt1

  • payload_url

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

    http://winnlinne.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-o7UXxOstmw 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: 0582Jhyjd

rsa_pubkey.plain

Extracted

Family
  • vidar

Version
  • 55

Botnet
  • 517

C2
  • https://t.me/truewallets

  • https://mas.to/@zara99

  • http://116.203.10.3:80

Attributes
  • profile_id

    517

Signatures

  • Detected Djvu ransomware 10 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
  • Checks computer location settings 2 TTPs 3 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Loads dropped DLL 2 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
  • Kills process with taskkill 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 55 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ca8a2770828d6c660dd6144ad0a989011ba43b753a8eeb83160608b95bc4fd67.exe
    "C:\Users\Admin\AppData\Local\Temp\ca8a2770828d6c660dd6144ad0a989011ba43b753a8eeb83160608b95bc4fd67.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:5012
    • C:\Users\Admin\AppData\Local\Temp\ca8a2770828d6c660dd6144ad0a989011ba43b753a8eeb83160608b95bc4fd67.exe
      "C:\Users\Admin\AppData\Local\Temp\ca8a2770828d6c660dd6144ad0a989011ba43b753a8eeb83160608b95bc4fd67.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3444
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\abdcc106-9982-432a-9685-460e70d99983" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:4156
      • C:\Users\Admin\AppData\Local\Temp\ca8a2770828d6c660dd6144ad0a989011ba43b753a8eeb83160608b95bc4fd67.exe
        "C:\Users\Admin\AppData\Local\Temp\ca8a2770828d6c660dd6144ad0a989011ba43b753a8eeb83160608b95bc4fd67.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3824
        • C:\Users\Admin\AppData\Local\Temp\ca8a2770828d6c660dd6144ad0a989011ba43b753a8eeb83160608b95bc4fd67.exe
          "C:\Users\Admin\AppData\Local\Temp\ca8a2770828d6c660dd6144ad0a989011ba43b753a8eeb83160608b95bc4fd67.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Checks computer location settings
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:116
          • C:\Users\Admin\AppData\Local\6d2217e7-cf46-4149-872d-33f18ca24760\build2.exe
            "C:\Users\Admin\AppData\Local\6d2217e7-cf46-4149-872d-33f18ca24760\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:3820
            • C:\Users\Admin\AppData\Local\6d2217e7-cf46-4149-872d-33f18ca24760\build2.exe
              "C:\Users\Admin\AppData\Local\6d2217e7-cf46-4149-872d-33f18ca24760\build2.exe"
              6⤵
              • Executes dropped EXE
              • Checks computer location settings
              • Loads dropped DLL
              • Checks processor information in registry
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of WriteProcessMemory
              PID:3280
              • C:\Windows\SysWOW64\cmd.exe
                "C:\Windows\System32\cmd.exe" C/c taskkill /im build2.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\6d2217e7-cf46-4149-872d-33f18ca24760\build2.exe" & del C:\PrograData\*.dll & exit
                7⤵
                • Suspicious use of WriteProcessMemory
                PID:1508
                • C:\Windows\SysWOW64\taskkill.exe
                  taskkill /im build2.exe /f
                  8⤵
                  • Kills process with taskkill
                  • Suspicious use of AdjustPrivilegeToken
                  PID:2836
                • C:\Windows\SysWOW64\timeout.exe
                  timeout /t 6
                  8⤵
                  • Delays execution with timeout.exe
                  PID:4912
          • C:\Users\Admin\AppData\Local\6d2217e7-cf46-4149-872d-33f18ca24760\build3.exe
            "C:\Users\Admin\AppData\Local\6d2217e7-cf46-4149-872d-33f18ca24760\build3.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of WriteProcessMemory
            PID:3068
            • 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:3856
  • 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 WriteProcessMemory
    PID:3736
    • 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"
      2⤵
      • Creates scheduled task(s)
      PID:2884

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        mozglue.dll

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

        nss3.dll

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

        07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
        • Size 2KB
        • SHA256 e24883740fbed2781e4df4e5387cd95c3345ec9944edeeb36babd2c10135fa00
        • MD5 SHA1 SHA512

        B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
        • Size 1KB
        • SHA256 630df8e970cc3b1ad508db713dd8be52e0ac7a5826f3f264a266232f9a1c23ee
        • MD5 SHA1 SHA512

        07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
        • Size 488B
        • SHA256 a8a75c826f15fb4f225319e785f7d6183ccf92753340fbed12f163b203d748b2
        • MD5 SHA1 SHA512

        B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
        • Size 482B
        • SHA256 ffa4cfe51df21dc6416544dde166000bb7e451307a214e6cdec00cd0bd0741ca
        • MD5 SHA1 SHA512

        build2.exe

        • Path C:\Users\Admin\AppData\Local\6d2217e7-cf46-4149-872d-33f18ca24760\build2.exe
        • Size 321KB
        • SHA256 2a5101345def285c8f52ad39f00261ba9e0375d3de73206d0b8c72ce3b6259c6
        • MD5 SHA1 SHA512 SSDEEP

        build2.exe

        • Path C:\Users\Admin\AppData\Local\6d2217e7-cf46-4149-872d-33f18ca24760\build2.exe
        • Size 321KB
        • SHA256 2a5101345def285c8f52ad39f00261ba9e0375d3de73206d0b8c72ce3b6259c6
        • MD5 SHA1 SHA512 SSDEEP

        build2.exe

        • Path C:\Users\Admin\AppData\Local\6d2217e7-cf46-4149-872d-33f18ca24760\build2.exe
        • Size 321KB
        • SHA256 2a5101345def285c8f52ad39f00261ba9e0375d3de73206d0b8c72ce3b6259c6
        • MD5 SHA1 SHA512 SSDEEP

        build3.exe

        • Path C:\Users\Admin\AppData\Local\6d2217e7-cf46-4149-872d-33f18ca24760\build3.exe
        • Size 9KB
        • SHA256 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
        • MD5 SHA1 SHA512 SSDEEP

        build3.exe

        • Path C:\Users\Admin\AppData\Local\6d2217e7-cf46-4149-872d-33f18ca24760\build3.exe
        • Size 9KB
        • SHA256 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
        • MD5 SHA1 SHA512 SSDEEP

        ca8a2770828d6c660dd6144ad0a989011ba43b753a8eeb83160608b95bc4fd67.exe

        • Path C:\Users\Admin\AppData\Local\abdcc106-9982-432a-9685-460e70d99983\ca8a2770828d6c660dd6144ad0a989011ba43b753a8eeb83160608b95bc4fd67.exe
        • Size 716KB
        • SHA256 ca8a2770828d6c660dd6144ad0a989011ba43b753a8eeb83160608b95bc4fd67
        • 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

        memory/116-152-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/116-147-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/116-188-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/116-145-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3280-168-0x0000000061E00000-0x0000000061EF3000-memory.dmp

        memory/3280-167-0x0000000000400000-0x0000000000463000-memory.dmp

        memory/3280-165-0x0000000000400000-0x0000000000463000-memory.dmp

        memory/3280-191-0x0000000000400000-0x0000000000463000-memory.dmp

        memory/3280-161-0x0000000000400000-0x0000000000463000-memory.dmp

        memory/3444-134-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3444-137-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3444-138-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3444-133-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3444-142-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3820-166-0x00000000020A0000-0x00000000020EF000-memory.dmp

        memory/3820-164-0x000000000096D000-0x0000000000999000-memory.dmp

        memory/3824-146-0x00000000020BA000-0x000000000214B000-memory.dmp

        memory/5012-135-0x00000000020DB000-0x000000000216C000-memory.dmp

        memory/5012-136-0x0000000002170000-0x000000000228B000-memory.dmp