Overview

overview

10

Static

static

332bca23e3...5a.exe

windows7_x64

10

332bca23e3...5a.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    4294211s
  • max time network
    130s
  • platform
    windows7_x64
  • resource
    win7-20220223-en
  • submitted
    06/03/2022, 06:41

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General

  • Target

    332bca23e362f6c95326ecc943cb39e93d6fdcf454d72a5e60c9e14f5802ce5a.exe

  • Size

    214KB

  • MD5

    42ea94ee3adca8b82fba15ecdde25f26

  • SHA1

    ca17412cd44d186db91c4b2fa7df03363533ffd2

  • SHA256

    332bca23e362f6c95326ecc943cb39e93d6fdcf454d72a5e60c9e14f5802ce5a

  • SHA512

    cbec5875fdbcd1182ce9cb87728f36f9a36da032589394b20418229780a2182f6641519fd7545bd812257492a0fd9a68ebfd487d6ec5ebb9e3f666558bb81874

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] telegram:uspex12345 Your personal ID: 822-7B1-847 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
  • Loads dropped DLL 2 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.

  • 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 5 IoCs
    evasionspywaretrojan
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 59 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\332bca23e362f6c95326ecc943cb39e93d6fdcf454d72a5e60c9e14f5802ce5a.exe
    "C:\Users\Admin\AppData\Local\Temp\332bca23e362f6c95326ecc943cb39e93d6fdcf454d72a5e60c9e14f5802ce5a.exe"
    1⤵
    • Loads dropped DLL
    • Adds Run key to start application
    • Modifies system certificate store
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1620
    • 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:272
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /C wmic shadowcopy delete
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1380
        • C:\Windows\SysWOW64\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1596
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /C bcdedit /set {default} recoveryenabled no
        3⤵
          PID:916
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\system32\cmd.exe" /C bcdedit /set {default} bootstatuspolicy ignoreallfailures
          3⤵
            PID:456
          • 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:1480
          • 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:612
            • C:\Windows\SysWOW64\Wbem\WMIC.exe
              wmic shadowcopy delete
              4⤵
              • Suspicious use of AdjustPrivilegeToken
              PID:2004
            • C:\Windows\SysWOW64\vssadmin.exe
              vssadmin delete shadows /all /quiet
              4⤵
              • Interacts with shadow copies
              PID:1092
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\system32\cmd.exe" /C vssadmin delete shadows /all /quiet
            3⤵
            • Suspicious use of WriteProcessMemory
            PID:1504
            • C:\Windows\SysWOW64\vssadmin.exe
              vssadmin delete shadows /all /quiet
              4⤵
              • Interacts with shadow copies
              PID:1980
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\system32\cmd.exe" /C wbadmin delete catalog -quiet
            3⤵
              PID:1472
          • C:\Windows\SysWOW64\notepad.exe
            notepad.exe
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:1988
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -u -p 1988 -s 196
              3⤵
              • Program crash
              PID:1672
        • C:\Windows\system32\vssvc.exe
          C:\Windows\system32\vssvc.exe
          1⤵
            PID:1448

          Network

          MITRE ATT&CK Enterprise v6

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          Downloads

          • memory/1620-54-0x0000000075AC1000-0x0000000075AC3000-memory.dmp

            Filesize

            8KB

            Download

          • memory/1988-59-0x00000000000C0000-0x00000000000C1000-memory.dmp

            Filesize

            4KB

            Download