Overview

overview

10

Static

static

332bca23e3...5a.exe

windows7_x64

10

332bca23e3...5a.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    151s
  • max time network
    135s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220113
  • 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: 4ED-42E-774 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
  • Checks computer location settings 2 TTPs 1 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.

  • Modifies system certificate store 2 TTPs 2 IoCs
    evasionspywaretrojan
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\332bca23e362f6c95326ecc943cb39e93d6fdcf454d72a5e60c9e14f5802ce5a.exe
    "C:\Users\Admin\AppData\Local\Temp\332bca23e362f6c95326ecc943cb39e93d6fdcf454d72a5e60c9e14f5802ce5a.exe"
    1⤵
    • Checks computer location settings
    • Adds Run key to start application
    • Modifies system certificate store
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3020
    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\taskeng.exe
      "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\taskeng.exe" -start
      2⤵
      • Executes dropped EXE
      • Enumerates connected drives
      • Suspicious use of WriteProcessMemory
      PID:384
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /C wmic shadowcopy delete
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1560
        • C:\Windows\SysWOW64\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:3392
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /C bcdedit /set {default} bootstatuspolicy ignoreallfailures
        3⤵
          PID:1592
        • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\taskeng.exe
          "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\taskeng.exe" -agent 0
          3⤵
          • Executes dropped EXE
          • Drops file in Program Files directory
          PID:1888
        • 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:1836
          • C:\Windows\SysWOW64\Wbem\WMIC.exe
            wmic shadowcopy delete
            4⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:116
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\system32\cmd.exe" /C vssadmin delete shadows /all /quiet
          3⤵
            PID:1756
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\system32\cmd.exe" /C wbadmin delete catalog -quiet
            3⤵
              PID:2368
            • C:\Windows\SysWOW64\cmd.exe
              "C:\Windows\system32\cmd.exe" /C bcdedit /set {default} recoveryenabled no
              3⤵
                PID:2376
            • C:\Windows\SysWOW64\notepad.exe
              notepad.exe
              2⤵
                PID:4064
            • C:\Windows\system32\vssvc.exe
              C:\Windows\system32\vssvc.exe
              1⤵
                PID:4472

              Network

              MITRE ATT&CK Enterprise v6

              Replay Monitor

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              Downloads

              • memory/4064-134-0x0000000000AB0000-0x0000000000AB1000-memory.dmp

                Filesize

                4KB

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