Overview

overview

10

Static

static

13098.scr

windows7_x64

10

13098.scr

windows10_x64

10

Analysis

  • max time kernel
    150s
  • max time network
    138s
  • platform
    windows10_x64
  • resource
    win10-en-20211104
  • submitted
    07/12/2021, 17:54

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General

  • Target

    13098.scr

  • Size

    250KB

  • MD5

    9f06f66560bbb04900e3acb8fbc15aff

  • SHA1

    902fa0c3644add69484b22ed5a809c2f52c0704c

  • SHA256

    fb80bbea1c179bf695c6817b78306696ebb474e4a2e49ce2e38b819338d43d49

  • SHA512

    738594d2ca1c711f7dd6ac9ea8f00c001fe17b8329143f3df837af01e693249098b592b023f6b05282f9dd89b0b275f543a6fa4709d410e3ba3b282de007c247

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: 2E0-BFD-7E8 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
  • 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 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 2 IoCs
    evasionspywaretrojan
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 45 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\13098.scr
    "C:\Users\Admin\AppData\Local\Temp\13098.scr" /S
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3512
    • C:\Users\Public\Videos\hgfdfds.exe
      "C:\Users\Public\Videos\hgfdfds.exe"
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:704
      • 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
        • Suspicious use of WriteProcessMemory
        PID:4412
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\system32\cmd.exe" /C wmic shadowcopy delete
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:500
          • C:\Windows\SysWOW64\Wbem\WMIC.exe
            wmic shadowcopy delete
            5⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:2156
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\system32\cmd.exe" /C bcdedit /set {default} recoveryenabled no
          4⤵
            PID:660
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\system32\cmd.exe" /C bcdedit /set {default} bootstatuspolicy ignoreallfailures
            4⤵
              PID:652
            • C:\Windows\SysWOW64\cmd.exe
              "C:\Windows\system32\cmd.exe" /C vssadmin delete shadows /all /quiet
              4⤵
              • Suspicious use of WriteProcessMemory
              PID:876
              • C:\Windows\SysWOW64\vssadmin.exe
                vssadmin delete shadows /all /quiet
                5⤵
                • Interacts with shadow copies
                PID:2300
            • 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:1232
              • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
                powershell.exe -ExecutionPolicy ByPass -Command "Get-WmiObject Win32_Shadowcopy | ForEach-Object {$_.Delete();}"
                5⤵
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:2648
              • C:\Windows\SysWOW64\Wbem\WMIC.exe
                WMIC.exe shadowcopy delete /nointeractive
                5⤵
                • Suspicious use of AdjustPrivilegeToken
                PID:4868
            • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\csrss.exe
              "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\csrss.exe" -agent 0
              4⤵
              • Executes dropped EXE
              • Drops file in Program Files directory
              PID:1400
            • C:\Windows\SysWOW64\cmd.exe
              "C:\Windows\system32\cmd.exe" /C wbadmin delete catalog -quiet
              4⤵
                PID:920
            • C:\Windows\SysWOW64\notepad.exe
              notepad.exe
              3⤵
                PID:4408
          • C:\Windows\system32\vssvc.exe
            C:\Windows\system32\vssvc.exe
            1⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:4436

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          • memory/2648-153-0x0000000008030000-0x0000000008031000-memory.dmp

            Filesize

            4KB

            Download

          • memory/2648-166-0x0000000009D00000-0x0000000009D01000-memory.dmp

            Filesize

            4KB

            Download

          • memory/2648-170-0x0000000004BD0000-0x0000000004BD1000-memory.dmp

            Filesize

            4KB

            Download

          • memory/2648-146-0x0000000004BD0000-0x0000000004BD1000-memory.dmp

            Filesize

            4KB

            Download

          • memory/2648-147-0x0000000004BD0000-0x0000000004BD1000-memory.dmp

            Filesize

            4KB

            Download

          • memory/2648-148-0x00000000070E0000-0x00000000070E1000-memory.dmp

            Filesize

            4KB

            Download

          • memory/2648-149-0x0000000007770000-0x0000000007771000-memory.dmp

            Filesize

            4KB

            Download

          • memory/2648-150-0x0000000007130000-0x0000000007131000-memory.dmp

            Filesize

            4KB

            Download

          • memory/2648-151-0x0000000007132000-0x0000000007133000-memory.dmp

            Filesize

            4KB

            Download

          • memory/2648-152-0x0000000007E20000-0x0000000007E21000-memory.dmp

            Filesize

            4KB

            Download

          • memory/2648-169-0x0000000007133000-0x0000000007134000-memory.dmp

            Filesize

            4KB

            Download

          • memory/2648-155-0x0000000008130000-0x0000000008131000-memory.dmp

            Filesize

            4KB

            Download

          • memory/2648-156-0x0000000008580000-0x0000000008581000-memory.dmp

            Filesize

            4KB

            Download

          • memory/2648-154-0x00000000080C0000-0x00000000080C1000-memory.dmp

            Filesize

            4KB

            Download

          • memory/2648-157-0x0000000008AB0000-0x0000000008AB1000-memory.dmp

            Filesize

            4KB

            Download

          • memory/2648-158-0x0000000008870000-0x0000000008871000-memory.dmp

            Filesize

            4KB

            Download

          • memory/2648-159-0x0000000004BD0000-0x0000000004BD1000-memory.dmp

            Filesize

            4KB

            Download

          • memory/2648-163-0x0000000009760000-0x0000000009761000-memory.dmp

            Filesize

            4KB

            Download

          • memory/2648-164-0x0000000009580000-0x0000000009581000-memory.dmp

            Filesize

            4KB

            Download

          • memory/2648-165-0x00000000095A0000-0x00000000095A1000-memory.dmp

            Filesize

            4KB

            Download

          • memory/4408-126-0x0000000001120000-0x0000000001121000-memory.dmp

            Filesize

            4KB

            Download