Overview

overview

10

Static

static

pattern.exe

windows7_x64

10

pattern.exe

windows10_x64

10

Analysis

  • max time kernel
    155s
  • max time network
    137s
  • platform
    windows10_x64
  • resource
    win10v20210410
  • submitted
    31/08/2021, 20:19

Sharing

Copy URL
Twitter E-mail
Report Analysis Logs

General

  • Target

    pattern.exe

  • Size

    416KB

  • MD5

    dcef208fcdac3345c6899a478d16980f

  • SHA1

    fd127c6ecaee57972b7acc3b8e4a2d3b25f928e0

  • SHA256

    824a76c39895bc3ad4f5dfc27fc3ac80d26514118c4669505a1f0cfdc8fdbcdc

  • SHA512

    28e403a6d66895a2461828f49acb2862602e6be94405657bee0aec5d35d86dd83713c4cd1f33d28b94fed6546633683f9ffa693d37dc94bc862f6584833f9fba

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: 359-338-480 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
  • Deletes itself 1 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 2 IoCs

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

    ransomware
  • Modifies system certificate store 2 TTPs 2 IoCs
    evasionspywaretrojan
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 42 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\pattern.exe
    "C:\Users\Admin\AppData\Local\Temp\pattern.exe"
    1⤵
    • Adds Run key to start application
    • Modifies system certificate store
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3172
    • 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
      • Suspicious use of WriteProcessMemory
      PID:4056
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /C wmic shadowcopy delete
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:3068
        • C:\Windows\SysWOW64\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:4092
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /C bcdedit /set {default} recoveryenabled no
        3⤵
          PID:688
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\system32\cmd.exe" /C vssadmin delete shadows /all /quiet
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:2220
          • C:\Windows\SysWOW64\vssadmin.exe
            vssadmin delete shadows /all /quiet
            4⤵
            • Interacts with shadow copies
            PID:4020
        • 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:3568
          • C:\Windows\SysWOW64\Wbem\WMIC.exe
            wmic shadowcopy delete
            4⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:3080
          • C:\Windows\SysWOW64\vssadmin.exe
            vssadmin delete shadows /all /quiet
            4⤵
            • Interacts with shadow copies
            PID:2204
        • 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:2296
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\system32\cmd.exe" /C wbadmin delete catalog -quiet
          3⤵
            PID:3648
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\system32\cmd.exe" /C bcdedit /set {default} bootstatuspolicy ignoreallfailures
            3⤵
              PID:3936
          • C:\Windows\SysWOW64\notepad.exe
            notepad.exe
            2⤵
            • Deletes itself
            PID:3476
        • C:\Windows\system32\vssvc.exe
          C:\Windows\system32\vssvc.exe
          1⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:3880

        Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • memory/2296-143-0x0000000000C40000-0x0000000000D85000-memory.dmp

          Filesize

          1.3MB

          Download

        • memory/3172-115-0x0000000000400000-0x0000000000557000-memory.dmp

          Filesize

          1.3MB

          Download

        • memory/3172-114-0x0000000000A90000-0x0000000000BD5000-memory.dmp

          Filesize

          1.3MB

          Download

        • memory/3476-121-0x00000000007A0000-0x00000000007A1000-memory.dmp

          Filesize

          4KB

          Download

        • memory/4056-120-0x0000000000E00000-0x0000000000F45000-memory.dmp

          Filesize

          1.3MB

          Download