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Overview

overview

10

Static

static

4e0d1edb76...7a.exe

windows7_x64

10

4e0d1edb76...7a.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    167s
  • max time network
    164s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220113
  • submitted
    06/03/2022, 06:50

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General

  • Target

    4e0d1edb76747fd945b87dd18299298f0df719edbea946119d91db59a9b6527a.exe

  • Size

    3.3MB

  • MD5

    d18bf81dbc8acce488abd633d8058cf5

  • SHA1

    1d6dcade355b4867e9435961655a9b9caa373528

  • SHA256

    4e0d1edb76747fd945b87dd18299298f0df719edbea946119d91db59a9b6527a

  • SHA512

    10a6b3994b1b0d37c9f3833e700baded6b89b0162078442b4de5a9747c23027d8943016c5941ba2e530ee5263b87c31a7714aa7bcb5051e5d63cf0a3cd88756f

Score
10/10
buranevasionpersistenceransomwareupx

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: 141-666-48E 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
  • 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
  • Checks computer location settings 2 TTPs 5 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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.

  • Delays execution with timeout.exe 4 IoCs
    evasion
  • 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 64 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs
    evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\4e0d1edb76747fd945b87dd18299298f0df719edbea946119d91db59a9b6527a.exe
    "C:\Users\Admin\AppData\Local\Temp\4e0d1edb76747fd945b87dd18299298f0df719edbea946119d91db59a9b6527a.exe"
    1⤵
    • Checks computer location settings
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:2032
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\ssd\onset\goodram.vbs"
      2⤵
      • Checks computer location settings
      • Suspicious use of WriteProcessMemory
      PID:2664
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\ssd\onset\81ldp.bat" "
        3⤵
        • Checks computer location settings
        • Modifies registry class
        • Suspicious use of WriteProcessMemory
        PID:3080
        • C:\ssd\onset\15sp.exe
          "15sp.exe" e -psion0811 01s.rar
          4⤵
          • Executes dropped EXE
          PID:4452
        • C:\Windows\SysWOW64\timeout.exe
          timeout 5
          4⤵
          • Delays execution with timeout.exe
          PID:4072
        • C:\Windows\SysWOW64\WScript.exe
          "C:\Windows\System32\WScript.exe" "C:\ssd\onset\Ztestram.vbs"
          4⤵
          • Checks computer location settings
          • Suspicious use of WriteProcessMemory
          PID:3204
          • C:\Windows\SysWOW64\cmd.exe
            C:\Windows\system32\cmd.exe /c ""C:\ssd\onset\sata1.bat" "
            5⤵
            • Suspicious use of WriteProcessMemory
            PID:1384
            • C:\Windows\SysWOW64\attrib.exe
              attrib +s +h "C:\ssd\"
              6⤵
              • Views/modifies file attributes
              PID:4024
            • C:\Windows\SysWOW64\timeout.exe
              timeout 2
              6⤵
              • Delays execution with timeout.exe
              PID:4400
            • C:\ssd\onset\mesager43.exe
              mesager43.exe /start
              6⤵
              • Executes dropped EXE
              • Checks computer location settings
              • Adds Run key to start application
              • Modifies system certificate store
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of WriteProcessMemory
              PID:2392
              • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\svchost.exe
                "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\svchost.exe" -start
                7⤵
                • Executes dropped EXE
                • Enumerates connected drives
                • Suspicious use of WriteProcessMemory
                PID:1288
                • C:\Windows\SysWOW64\cmd.exe
                  "C:\Windows\system32\cmd.exe" /C wmic shadowcopy delete
                  8⤵
                    PID:2224
                    • C:\Windows\SysWOW64\Wbem\WMIC.exe
                      wmic shadowcopy delete
                      9⤵
                      • Suspicious use of AdjustPrivilegeToken
                      PID:3156
                  • C:\Windows\SysWOW64\cmd.exe
                    "C:\Windows\system32\cmd.exe" /C bcdedit /set {default} recoveryenabled no
                    8⤵
                      PID:1336
                    • C:\Windows\SysWOW64\cmd.exe
                      "C:\Windows\system32\cmd.exe" /C bcdedit /set {default} bootstatuspolicy ignoreallfailures
                      8⤵
                        PID:3588
                      • C:\Windows\SysWOW64\cmd.exe
                        "C:\Windows\system32\cmd.exe" /C wbadmin delete catalog -quiet
                        8⤵
                          PID:1636
                        • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\svchost.exe
                          "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\svchost.exe" -agent 0
                          8⤵
                          • Executes dropped EXE
                          • Drops file in Program Files directory
                          PID:472
                        • C:\Windows\SysWOW64\cmd.exe
                          "C:\Windows\system32\cmd.exe" /C C:\Users\Admin\AppData\Local\Temp\~temp001.bat
                          8⤵
                            PID:460
                            • C:\Windows\SysWOW64\Wbem\WMIC.exe
                              wmic shadowcopy delete
                              9⤵
                              • Suspicious use of AdjustPrivilegeToken
                              PID:4156
                          • C:\Windows\SysWOW64\cmd.exe
                            "C:\Windows\system32\cmd.exe" /C vssadmin delete shadows /all /quiet
                            8⤵
                              PID:4764
                          • C:\Windows\SysWOW64\notepad.exe
                            notepad.exe
                            7⤵
                              PID:4324
                          • C:\Windows\SysWOW64\taskkill.exe
                            taskkill /f /im 15sp.exe
                            6⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:4920
                          • C:\Windows\SysWOW64\taskkill.exe
                            taskkill /f /im 15sp.exe
                            6⤵
                            • Kills process with taskkill
                            • Suspicious use of AdjustPrivilegeToken
                            PID:4264
                          • C:\Windows\SysWOW64\attrib.exe
                            attrib -s -h "C:\ssd\onset\mesager43.exe"
                            6⤵
                            • Views/modifies file attributes
                            PID:232
                          • C:\Windows\SysWOW64\timeout.exe
                            timeout 4
                            6⤵
                            • Delays execution with timeout.exe
                            PID:216
                      • C:\Windows\SysWOW64\timeout.exe
                        timeout 4
                        4⤵
                        • Delays execution with timeout.exe
                        PID:1612
                • C:\Windows\system32\vssvc.exe
                  C:\Windows\system32\vssvc.exe
                  1⤵
                    PID:2004

                  Network

                  MITRE ATT&CK Enterprise v6

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                  Downloads

                  • memory/2032-130-0x00000000024A0000-0x00000000024A1000-memory.dmp

                    Filesize

                    4KB

                    Download

                  • memory/4324-151-0x0000000000E90000-0x0000000000E91000-memory.dmp

                    Filesize

                    4KB

                    Download