Overview

overview

10

Static

static

hci0xn0zip.exe

windows7_x64

10

hci0xn0zip.exe

windows10_x64

10

Analysis

  • max time kernel
    124s
  • max time network
    137s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    04/11/2020, 10:54

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General

  • Target
    hci0xn0zip.exe
  • Size 3.3MB
  • Sample201104-cebgax7bdx
  • SHA256 4e0d1edb76747fd945b87dd18299298f0df719edbea946119d91db59a9b6527a
  • MD5 SHA1 SHA512
Score
10/10
buranevasionpersistenceransomwareupx

Malware Config

Extracted

Path

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

  • 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: 478-E76-A52 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 4 IoCs
  • Modifies extensions of user files 2 IoCs

    Ransomware generally changes the extension on encrypted files.

    ransomware
  • Sets file to hidden 1 TTPs

    Modifies file attributes to stop it showing in Explorer etc.

    evasion
  • UPX packed file 5 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

    upx
  • 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.

  • Modifies service 2 TTPs 4 IoCs
    persistence
  • Drops file in Program Files directory 24139 IoCs
  • Delays execution with timeout.exe 4 IoCs
    evasion
  • Interacts with shadow copies 2 TTPs 2 IoCs

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

    ransomware
  • Kills process with taskkill 2 IoCs
    evasion
  • Modifies registry class 2 IoCs
  • Modifies system certificate store 2 TTPs 2 IoCs
    evasionspywaretrojan
  • Suspicious use of AdjustPrivilegeToken 93 IoCs
  • Suspicious use of WriteProcessMemory 90 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs
    evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\hci0xn0zip.exe
    "C:\Users\Admin\AppData\Local\Temp\hci0xn0zip.exe"
    1⤵
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:3304
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\ssd\onset\goodram.vbs"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3420
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\ssd\onset\81ldp.bat" "
        3⤵
        • Modifies registry class
        • Suspicious use of WriteProcessMemory
        PID:736
        • C:\ssd\onset\15sp.exe
          "15sp.exe" e -psion0811 01s.rar
          4⤵
          • Executes dropped EXE
          PID:3428
        • C:\Windows\SysWOW64\timeout.exe
          timeout 5
          4⤵
          • Delays execution with timeout.exe
          PID:3112
        • C:\Windows\SysWOW64\WScript.exe
          "C:\Windows\System32\WScript.exe" "C:\ssd\onset\Ztestram.vbs"
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:2552
          • C:\Windows\SysWOW64\cmd.exe
            C:\Windows\system32\cmd.exe /c ""C:\ssd\onset\sata1.bat" "
            5⤵
            • Suspicious use of WriteProcessMemory
            PID:980
            • C:\Windows\SysWOW64\attrib.exe
              attrib +s +h "C:\ssd\"
              6⤵
              • Views/modifies file attributes
              PID:1512
            • C:\Windows\SysWOW64\timeout.exe
              timeout 2
              6⤵
              • Delays execution with timeout.exe
              PID:952
            • C:\ssd\onset\mesager43.exe
              mesager43.exe /start
              6⤵
              • Executes dropped EXE
              • Adds Run key to start application
              • Modifies system certificate store
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of WriteProcessMemory
              PID:1988
              • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\lsass.exe
                "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\lsass.exe" -start
                7⤵
                • Executes dropped EXE
                • Enumerates connected drives
                • Suspicious use of WriteProcessMemory
                PID:2260
                • C:\Windows\SysWOW64\cmd.exe
                  "C:\Windows\system32\cmd.exe" /C wmic shadowcopy delete
                  8⤵
                    PID:1300
                    • C:\Windows\SysWOW64\Wbem\WMIC.exe
                      wmic shadowcopy delete
                      9⤵
                      • Suspicious use of AdjustPrivilegeToken
                      PID:3256
                  • C:\Windows\SysWOW64\cmd.exe
                    "C:\Windows\system32\cmd.exe" /C bcdedit /set {default} recoveryenabled no
                    8⤵
                      PID:3624
                    • C:\Windows\SysWOW64\cmd.exe
                      "C:\Windows\system32\cmd.exe" /C bcdedit /set {default} bootstatuspolicy ignoreallfailures
                      8⤵
                        PID:3652
                      • C:\Windows\SysWOW64\cmd.exe
                        "C:\Windows\system32\cmd.exe" /C wbadmin delete catalog -quiet
                        8⤵
                          PID:2428
                        • C:\Windows\SysWOW64\cmd.exe
                          "C:\Windows\system32\cmd.exe" /C vssadmin delete shadows /all /quiet
                          8⤵
                            PID:620
                            • C:\Windows\SysWOW64\vssadmin.exe
                              vssadmin delete shadows /all /quiet
                              9⤵
                              • Interacts with shadow copies
                              PID:1784
                          • C:\Windows\SysWOW64\cmd.exe
                            "C:\Windows\system32\cmd.exe" /C C:\Users\Admin\AppData\Local\Temp\~temp001.bat
                            8⤵
                              PID:2704
                              • C:\Windows\SysWOW64\Wbem\WMIC.exe
                                wmic shadowcopy delete
                                9⤵
                                • Suspicious use of AdjustPrivilegeToken
                                PID:776
                              • C:\Windows\SysWOW64\vssadmin.exe
                                vssadmin delete shadows /all /quiet
                                9⤵
                                • Interacts with shadow copies
                                PID:2212
                            • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\lsass.exe
                              "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\lsass.exe" -agent 0
                              8⤵
                              • Executes dropped EXE
                              • Modifies extensions of user files
                              • Drops file in Program Files directory
                              PID:348
                            • C:\Windows\SysWOW64\notepad.exe
                              notepad.exe
                              8⤵
                                PID:1880
                            • C:\Windows\SysWOW64\notepad.exe
                              notepad.exe
                              7⤵
                                PID:748
                            • C:\Windows\SysWOW64\taskkill.exe
                              taskkill /f /im 15sp.exe
                              6⤵
                              • Kills process with taskkill
                              • Suspicious use of AdjustPrivilegeToken
                              PID:2400
                            • C:\Windows\SysWOW64\taskkill.exe
                              taskkill /f /im 15sp.exe
                              6⤵
                              • Kills process with taskkill
                              • Suspicious use of AdjustPrivilegeToken
                              PID:3948
                            • C:\Windows\SysWOW64\attrib.exe
                              attrib -s -h "C:\ssd\onset\mesager43.exe"
                              6⤵
                              • Views/modifies file attributes
                              PID:2952
                            • C:\Windows\SysWOW64\timeout.exe
                              timeout 4
                              6⤵
                              • Delays execution with timeout.exe
                              PID:2516
                        • C:\Windows\SysWOW64\timeout.exe
                          timeout 4
                          4⤵
                          • Delays execution with timeout.exe
                          PID:2648
                  • C:\Windows\system32\vssvc.exe
                    C:\Windows\system32\vssvc.exe
                    1⤵
                    • Modifies service
                    • Suspicious use of AdjustPrivilegeToken
                    PID:3852

                  Network

                        MITRE ATT&CK Enterprise v6

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                        Downloads

                        memory/748-21-0x0000000000650000-0x0000000000651000-memory.dmp
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