Overview

overview

10

Static

static

1107.exe

windows7_x64

10

1107.exe

windows10_x64

10

Analysis

  • max time kernel
    117s
  • max time network
    119s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    10/12/2021, 12:38

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General

  • Target

    1107.exe

  • Size

    250KB

  • MD5

    9fbe16a50773ecb9dbace5e388a6c37e

  • SHA1

    d9da6460238150e2bc24a9e4b2bd085bab2b3e9e

  • SHA256

    f38c40c74a0a9953697c63fbd375c064cb2d59ce478435c7357bd68f382dd26f

  • SHA512

    d29eaad3167b01b7d5b6c7d2c0278ff56bf7c863cf1d13c55d13e16b7adebf33ad86df3b358c5f773bef3e3a9602cd248e1770557745b7ae8735186da8e154e8

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] Reserved email: [email protected] Reserved email: [email protected] Your personal ID: 305-3DC-2B4 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 3 IoCs
  • Modifies extensions of user files 4 IoCs

    Ransomware generally changes the extension on encrypted files.

    ransomware
  • 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
  • Drops file in Windows directory 1 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 64 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1107.exe
    "C:\Users\Admin\AppData\Local\Temp\1107.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1576
    • C:\Users\Public\Videos\hgfdfds.exe
      "C:\Users\Public\Videos\hgfdfds.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:832
      • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\csrss.exe
        "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\csrss.exe" -start
        3⤵
        • Executes dropped EXE
        • Enumerates connected drives
        • Modifies system certificate store
        • Suspicious use of WriteProcessMemory
        PID:1212
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\system32\cmd.exe" /C wmic shadowcopy delete
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1716
          • C:\Windows\SysWOW64\Wbem\WMIC.exe
            wmic shadowcopy delete
            5⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:820
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\system32\cmd.exe" /C bcdedit /set {default} recoveryenabled no
          4⤵
            PID:928
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\system32\cmd.exe" /C bcdedit /set {default} bootstatuspolicy ignoreallfailures
            4⤵
              PID:1940
            • C:\Windows\SysWOW64\cmd.exe
              "C:\Windows\system32\cmd.exe" /C wbadmin delete catalog -quiet
              4⤵
                PID:2028
              • C:\Windows\SysWOW64\cmd.exe
                "C:\Windows\system32\cmd.exe" /C vssadmin delete shadows /all /quiet
                4⤵
                • Suspicious use of WriteProcessMemory
                PID:1988
                • C:\Windows\SysWOW64\vssadmin.exe
                  vssadmin delete shadows /all /quiet
                  5⤵
                  • Interacts with shadow copies
                  PID:1872
              • C:\Windows\SysWOW64\cmd.exe
                "C:\Windows\system32\cmd.exe" /C C:\Users\Admin\AppData\Local\Temp\~temp001.bat
                4⤵
                • Suspicious use of WriteProcessMemory
                PID:1412
                • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
                  powershell.exe -ExecutionPolicy ByPass -Command "Get-WmiObject Win32_Shadowcopy | ForEach-Object {$_.Delete();}"
                  5⤵
                  • Drops file in System32 directory
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of AdjustPrivilegeToken
                  PID:1492
                • C:\Windows\SysWOW64\Wbem\WMIC.exe
                  WMIC.exe shadowcopy delete /nointeractive
                  5⤵
                  • Suspicious use of AdjustPrivilegeToken
                  PID:796
              • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\csrss.exe
                "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\csrss.exe" -agent 0
                4⤵
                • Executes dropped EXE
                • Modifies extensions of user files
                • Drops file in Program Files directory
                • Drops file in Windows directory
                PID:1620
              • C:\Windows\SysWOW64\notepad.exe
                notepad.exe
                4⤵
                  PID:528
              • C:\Windows\SysWOW64\notepad.exe
                notepad.exe
                3⤵
                  PID:1144
            • C:\Windows\system32\vssvc.exe
              C:\Windows\system32\vssvc.exe
              1⤵
              • Suspicious use of AdjustPrivilegeToken
              PID:748

            Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

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            Downloads

            • memory/528-125-0x00000000000E0000-0x00000000000E1000-memory.dmp

              Filesize

              4KB

              Download

            • memory/832-58-0x00000000763F1000-0x00000000763F3000-memory.dmp

              Filesize

              8KB

              Download

            • memory/1144-72-0x00000000000A0000-0x00000000000A1000-memory.dmp

              Filesize

              4KB

              Download

            • memory/1144-65-0x0000000000080000-0x0000000000081000-memory.dmp

              Filesize

              4KB

              Download

            • memory/1492-95-0x0000000002570000-0x00000000031BA000-memory.dmp

              Filesize

              12.3MB

              Download

            • memory/1492-96-0x0000000002570000-0x00000000031BA000-memory.dmp

              Filesize

              12.3MB

              Download

            • memory/1576-55-0x000007FEFC031000-0x000007FEFC033000-memory.dmp

              Filesize

              8KB

              Download