Overview

overview

10

Static

static

March 4.scr

windows7_x64

10

March 4.scr

windows10-2004_x64

1

Analysis

  • max time kernel
    153s
  • max time network
    124s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    06/02/2022, 23:41

Sharing

Copy URL
Twitter E-mail
Report Analysis Logs

General

  • Target

    March 4.scr

  • Size

    812KB

  • MD5

    5181f541a6d97bab854d5eba326ea7d9

  • SHA1

    16d9967a2658ac765d7acbea18c556b927b810be

  • SHA256

    b7f96fbb9844cac5c7f4ec966683f3564bbb9a2f453927e1c579dcb0154f5f83

  • SHA512

    c282d9d6479c10fcc9fa6f674c901df1f1ad94b9354f6e427a7b445d0efad84efed6d7c29a0bc2a37b5ea07ee9a359f0e922d7c24f061258ae11fe4c44e9e4fa

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] Your personal ID: 6B3-226-291 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
  • Loads dropped DLL 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 5 IoCs
    evasionspywaretrojan
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 55 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\March 4.scr
    "C:\Users\Admin\AppData\Local\Temp\March 4.scr" /S
    1⤵
    • Loads dropped DLL
    • Adds Run key to start application
    • Modifies system certificate store
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1080
    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\svchost.exe
      "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\svchost.exe" -start
      2⤵
      • Executes dropped EXE
      • Enumerates connected drives
      • Modifies system certificate store
      • Suspicious use of WriteProcessMemory
      PID:1400
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /C wmic shadowcopy delete
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1556
        • C:\Windows\SysWOW64\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1076
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /C bcdedit /set {default} recoveryenabled no
        3⤵
          PID:1488
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\system32\cmd.exe" /C bcdedit /set {default} bootstatuspolicy ignoreallfailures
          3⤵
            PID:308
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\system32\cmd.exe" /C wbadmin delete catalog -quiet
            3⤵
              PID:1704
            • C:\Windows\SysWOW64\cmd.exe
              "C:\Windows\system32\cmd.exe" /C vssadmin delete shadows /all /quiet
              3⤵
              • Suspicious use of WriteProcessMemory
              PID:2032
              • C:\Windows\SysWOW64\vssadmin.exe
                vssadmin delete shadows /all /quiet
                4⤵
                • Interacts with shadow copies
                PID:1836
            • 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:2036
              • C:\Windows\SysWOW64\Wbem\WMIC.exe
                wmic shadowcopy delete
                4⤵
                • Suspicious use of AdjustPrivilegeToken
                PID:1588
              • C:\Windows\SysWOW64\vssadmin.exe
                vssadmin delete shadows /all /quiet
                4⤵
                • Interacts with shadow copies
                PID:1084
            • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\svchost.exe
              "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\svchost.exe" -agent 0
              3⤵
              • Executes dropped EXE
              • Drops file in Program Files directory
              PID:1604
          • C:\Windows\SysWOW64\notepad.exe
            notepad.exe
            2⤵
            • Deletes itself
            PID:1560
        • C:\Windows\system32\vssvc.exe
          C:\Windows\system32\vssvc.exe
          1⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:268

        Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • memory/1080-55-0x0000000076371000-0x0000000076373000-memory.dmp

          Filesize

          8KB

          Download

        • memory/1080-57-0x0000000000400000-0x0000000005678000-memory.dmp

          Filesize

          82.5MB

          Download

        • memory/1080-56-0x0000000007120000-0x000000000C37C000-memory.dmp

          Filesize

          82.4MB

          Download

        • memory/1400-76-0x0000000000400000-0x0000000005678000-memory.dmp

          Filesize

          82.5MB

          Download

        • memory/1400-68-0x0000000006F90000-0x000000000C1EC000-memory.dmp

          Filesize

          82.4MB

          Download

        • memory/1560-61-0x0000000000080000-0x0000000000081000-memory.dmp

          Filesize

          4KB

          Download

        • memory/1560-65-0x00000000000A0000-0x00000000000A1000-memory.dmp

          Filesize

          4KB

          Download

        • memory/1604-80-0x00000000071B0000-0x000000000C40C000-memory.dmp

          Filesize

          82.4MB

          Download