Overview

overview

10

Static

static

442bf867c8...24.exe

windows7_x64

10

442bf867c8...24.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    4294208s
  • max time network
    125s
  • platform
    windows7_x64
  • resource
    win7-20220223-en
  • submitted
    05/03/2022, 18:01

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General

  • Target

    442bf867c8738c7231ff09db0715ec79d0ae15c050fbd46946c45b76a040d024.exe

  • Size

    214KB

  • MD5

    2f1ecf99dd8a2648dd013c5fe6ecb6f5

  • SHA1

    121c377693b96eef8e84861f091ef47e6fb6cae5

  • SHA256

    442bf867c8738c7231ff09db0715ec79d0ae15c050fbd46946c45b76a040d024

  • SHA512

    793eb6a3f3d0323b0749a35e372c9fcde15a912f32d74fc5fa0fc104c32d8348f431347fefd1c34e3d51d9b20432f8e66b9ae3b9523b4b4b21e76b6fd2ae8219

Score
10/10
buranransomware

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] Your personal ID: 42A-DB3-1AF 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
  • Modifies extensions of user files 2 IoCs

    Ransomware generally changes the extension on encrypted files.

    ransomware
  • 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
  • Program crash 1 IoCs
  • 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 3 IoCs
    evasionspywaretrojan
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 55 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\442bf867c8738c7231ff09db0715ec79d0ae15c050fbd46946c45b76a040d024.exe
    "C:\Users\Admin\AppData\Local\Temp\442bf867c8738c7231ff09db0715ec79d0ae15c050fbd46946c45b76a040d024.exe"
    1⤵
    • Enumerates connected drives
    • Modifies system certificate store
    • Suspicious use of WriteProcessMemory
    PID:1160
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /C wmic shadowcopy delete
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1116
      • C:\Windows\SysWOW64\Wbem\WMIC.exe
        wmic shadowcopy delete
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:1832
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /C bcdedit /set {default} bootstatuspolicy ignoreallfailures
      2⤵
        PID:744
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /C bcdedit /set {default} recoveryenabled no
        2⤵
          PID:1320
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\system32\cmd.exe" /C vssadmin delete shadows /all /quiet
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:1728
          • C:\Windows\SysWOW64\vssadmin.exe
            vssadmin delete shadows /all /quiet
            3⤵
            • Interacts with shadow copies
            PID:540
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\system32\cmd.exe" /C wbadmin delete catalog -quiet
          2⤵
            PID:1868
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\system32\cmd.exe" /C C:\Users\Admin\AppData\Local\Temp\~temp001.bat
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:1660
            • C:\Windows\SysWOW64\Wbem\WMIC.exe
              wmic shadowcopy delete
              3⤵
              • Suspicious use of AdjustPrivilegeToken
              PID:1684
            • C:\Windows\SysWOW64\vssadmin.exe
              vssadmin delete shadows /all /quiet
              3⤵
              • Interacts with shadow copies
              PID:1748
          • C:\Users\Admin\AppData\Local\Temp\442bf867c8738c7231ff09db0715ec79d0ae15c050fbd46946c45b76a040d024.exe
            "C:\Users\Admin\AppData\Local\Temp\442bf867c8738c7231ff09db0715ec79d0ae15c050fbd46946c45b76a040d024.exe" -agent 0
            2⤵
            • Modifies extensions of user files
            • Drops file in Program Files directory
            PID:2004
          • C:\Windows\SysWOW64\notepad.exe
            notepad.exe
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:1136
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -u -p 1136 -s 196
              3⤵
              • Program crash
              PID:1740
        • C:\Windows\system32\vssvc.exe
          C:\Windows\system32\vssvc.exe
          1⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1980

        Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • memory/1136-80-0x0000000000080000-0x0000000000081000-memory.dmp

          Filesize

          4KB

          Download

        • memory/1160-54-0x00000000752A1000-0x00000000752A3000-memory.dmp

          Filesize

          8KB

          Download