Overview

overview

10

Static

static

1016366f5a...70.exe

windows7_x64

10

1016366f5a...70.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    4294206s
  • max time network
    129s
  • platform
    windows7_x64
  • resource
    win7-20220223-en
  • submitted
    05-03-2022 20:09

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General

  • Target

    1016366f5a33b98470c591bda8b65c421c2bfc690aa9fd51d8049abd605c0070.exe

  • Size

    2.7MB

  • MD5

    4301b4d1cb937816ffe288401d8938bf

  • SHA1

    14126bcc7b1a7ec96114fb28a74c6a4d7e008246

  • SHA256

    1016366f5a33b98470c591bda8b65c421c2bfc690aa9fd51d8049abd605c0070

  • SHA512

    82b0ebf62016f0b578384858b4d88fa97c70022a6e5e67871d93da5de2777553f949d40e6968ab9755cec4b48c8e40bdbc2ef4a1bd7a2db3ce52070e12b292bd

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: 4E0-601-754 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 2 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 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1016366f5a33b98470c591bda8b65c421c2bfc690aa9fd51d8049abd605c0070.exe
    "C:\Users\Admin\AppData\Local\Temp\1016366f5a33b98470c591bda8b65c421c2bfc690aa9fd51d8049abd605c0070.exe"
    1⤵
    • Loads dropped DLL
    • Adds Run key to start application
    • Modifies system certificate store
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1076
    • 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
      • Modifies system certificate store
      • Suspicious use of WriteProcessMemory
      PID:1968
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /C wmic shadowcopy delete
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:872
        • C:\Windows\SysWOW64\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:972
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /C bcdedit /set {default} recoveryenabled no
        3⤵
          PID:1996
        • 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:452
        • 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:1372
          • C:\Windows\SysWOW64\Wbem\WMIC.exe
            wmic shadowcopy delete
            4⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:1488
          • C:\Windows\SysWOW64\vssadmin.exe
            vssadmin delete shadows /all /quiet
            4⤵
            • Interacts with shadow copies
            PID:1664
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\system32\cmd.exe" /C vssadmin delete shadows /all /quiet
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:1340
          • C:\Windows\SysWOW64\vssadmin.exe
            vssadmin delete shadows /all /quiet
            4⤵
            • Interacts with shadow copies
            PID:840
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\system32\cmd.exe" /C wbadmin delete catalog -quiet
          3⤵
            PID:1692
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\system32\cmd.exe" /C bcdedit /set {default} bootstatuspolicy ignoreallfailures
            3⤵
              PID:108
            • C:\Windows\SysWOW64\notepad.exe
              notepad.exe
              3⤵
                PID:592
                • C:\Windows\SysWOW64\WerFault.exe
                  C:\Windows\SysWOW64\WerFault.exe -u -p 592 -s 196
                  4⤵
                  • Program crash
                  PID:1828
            • C:\Windows\SysWOW64\notepad.exe
              notepad.exe
              2⤵
              • Suspicious use of WriteProcessMemory
              PID:748
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 748 -s 196
                3⤵
                • Program crash
                PID:868
          • C:\Windows\system32\vssvc.exe
            C:\Windows\system32\vssvc.exe
            1⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:1896

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          • memory/748-59-0x00000000000C0000-0x00000000000C1000-memory.dmp

            Filesize

            4KB

            Download

          • memory/1076-54-0x0000000075801000-0x0000000075803000-memory.dmp

            Filesize

            8KB

            Download