Overview

overview

10

Static

static

522d6e25e6...74.exe

windows7_x64

10

522d6e25e6...74.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    164s
  • max time network
    146s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    12/02/2022, 06:04

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General

  • Target

    522d6e25e6b7062786b699c76d46c2a510d94ca0760447a1d0951a6718fc9774.exe

  • Size

    214KB

  • MD5

    82663d9b96e1cb72bab78a9f56a50678

  • SHA1

    29a5bd379073cd3073764a4f45fac283b0febcd2

  • SHA256

    522d6e25e6b7062786b699c76d46c2a510d94ca0760447a1d0951a6718fc9774

  • SHA512

    3b2ba0a58482d310a4b3f044bfa88b5ce91b7a293e4241c8dc2e477029cd78e2df7d00dfee8b4213f87a26dce9c84e31807f8e503becbc64a97fe1f3bf5ac36c

Score
10/10
buranpersistenceransomware

Malware Config

Extracted

Path

C:\!!! ALL YOUR FILES ARE ENCRYPTED !!!.TXT

Family

buran

Ransom Note
!!! ALL YOUR FILES ARE ENCRYPTED !!! All your files, documents, photos, databases and other important files are encrypted. You are not able to decrypt it by yourself! The only method of recovering files is to purchase an unique private key. Only we can give you this key and only we can recover your files. To be sure we have the decryptor and it works you can send an email: [email protected] and decrypt one file for free. But this file should be of not valuable! Do you really want to restore your files? Write to email: [email protected] Telegram @payransom500 Btc 500$ adress bc1qas8m3c2jv4uyurxacdt99ujj6gp6xt4tqeul8l Your personal ID: 155-9DC-526 Attention! * Do not rename encrypted files. * Do not try to decrypt your data using third party software, it may cause permanent data loss. * Decryption of your files with the help of third parties may cause increased price (they add their fee to our) or you can become a victim of a scam.

Signatures

  • Buran

    Ransomware-as-a-service based on the VegaLocker family first identified in 2019.

    ransomwareburan
  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

    ransomware
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
    persistence
  • Enumerates connected drives 3 TTPs 24 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Drops file in System32 directory 1 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Interacts with shadow copies 2 TTPs 1 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

    ransomware
  • Modifies system certificate store 2 TTPs 5 IoCs
    evasionspywaretrojan
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 44 IoCs
  • Suspicious use of WriteProcessMemory 44 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\522d6e25e6b7062786b699c76d46c2a510d94ca0760447a1d0951a6718fc9774.exe
    "C:\Users\Admin\AppData\Local\Temp\522d6e25e6b7062786b699c76d46c2a510d94ca0760447a1d0951a6718fc9774.exe"
    1⤵
    • Loads dropped DLL
    • Adds Run key to start application
    • Modifies system certificate store
    • Suspicious use of WriteProcessMemory
    PID:1564
    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\services.exe
      "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\services.exe" -start
      2⤵
      • Executes dropped EXE
      • Enumerates connected drives
      • Modifies system certificate store
      • Suspicious use of WriteProcessMemory
      PID:284
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /C wmic shadowcopy delete
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:544
        • C:\Windows\SysWOW64\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1080
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /C bcdedit /set {default} recoveryenabled no
        3⤵
          PID:1688
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\system32\cmd.exe" /C bcdedit /set {default} bootstatuspolicy ignoreallfailures
          3⤵
            PID:1664
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\system32\cmd.exe" /C wbadmin delete catalog -quiet
            3⤵
              PID:1532
            • C:\Windows\SysWOW64\cmd.exe
              "C:\Windows\system32\cmd.exe" /C vssadmin delete shadows /all /quiet
              3⤵
              • Suspicious use of WriteProcessMemory
              PID:1932
              • C:\Windows\SysWOW64\vssadmin.exe
                vssadmin delete shadows /all /quiet
                4⤵
                • Interacts with shadow copies
                PID:1848
            • C:\Windows\SysWOW64\cmd.exe
              "C:\Windows\system32\cmd.exe" /C C:\Users\Admin\AppData\Local\Temp\~temp001.bat
              3⤵
              • Suspicious use of WriteProcessMemory
              PID:560
              • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
                powershell.exe -ExecutionPolicy ByPass -Command "Get-WmiObject Win32_Shadowcopy | ForEach-Object {$_.Delete();}"
                4⤵
                • Drops file in System32 directory
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:1384
            • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\services.exe
              "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\services.exe" -agent 0
              3⤵
              • Executes dropped EXE
              • Drops file in Program Files directory
              PID:1628
        • C:\Windows\system32\vssvc.exe
          C:\Windows\system32\vssvc.exe
          1⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1408

        Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • memory/1384-75-0x0000000072B31000-0x0000000072B32000-memory.dmp

          Filesize

          4KB

          Download

        • memory/1384-76-0x00000000025E0000-0x00000000025E1000-memory.dmp

          Filesize

          4KB

          Download

        • memory/1384-77-0x0000000072B32000-0x0000000072B34000-memory.dmp

          Filesize

          8KB

          Download

        • memory/1384-78-0x00000000025E1000-0x00000000025E2000-memory.dmp

          Filesize

          4KB

          Download

        • memory/1384-79-0x00000000025E2000-0x00000000025E4000-memory.dmp

          Filesize

          8KB

          Download

        • memory/1564-55-0x00000000756C1000-0x00000000756C3000-memory.dmp

          Filesize

          8KB

          Download