Overview

overview

10

Static

static

Buran.exe

windows7_x64

10

Buran.exe

windows10_x64

10

Analysis

  • max time kernel
    150s
  • max time network
    127s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    08-01-2021 06:58

Sharing

Copy URL
Twitter E-mail
Report Analysis Logs

General

  • Target

    Buran.exe

  • Size

    214KB

  • MD5

    2f1ecf99dd8a2648dd013c5fe6ecb6f5

  • SHA1

    121c377693b96eef8e84861f091ef47e6fb6cae5

  • SHA256

    442bf867c8738c7231ff09db0715ec79d0ae15c050fbd46946c45b76a040d024

  • SHA512

    793eb6a3f3d0323b0749a35e372c9fcde15a912f32d74fc5fa0fc104c32d8348f431347fefd1c34e3d51d9b20432f8e66b9ae3b9523b4b4b21e76b6fd2ae8219

Score
10/10
buranransomware

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: uspex1@cock.li 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: uspex1@cock.li Reserved email: uspex2@cock.li Your personal ID: 611-63B-EB4 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.
Emails

uspex1@cock.li

uspex2@cock.li

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
  • 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 19961 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 2 IoCs
    evasionspywaretrojan
  • Suspicious use of AdjustPrivilegeToken 87 IoCs
  • Suspicious use of WriteProcessMemory 33 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Buran.exe
    "C:\Users\Admin\AppData\Local\Temp\Buran.exe"
    1⤵
    • Enumerates connected drives
    • Modifies system certificate store
    • Suspicious use of WriteProcessMemory
    PID:500
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /C wmic shadowcopy delete
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3608
      • C:\Windows\SysWOW64\Wbem\WMIC.exe
        wmic shadowcopy delete
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:1324
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /C bcdedit /set {default} recoveryenabled no
      2⤵
        PID:2684
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /C bcdedit /set {default} bootstatuspolicy ignoreallfailures
        2⤵
          PID:188
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\system32\cmd.exe" /C wbadmin delete catalog -quiet
          2⤵
            PID:196
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\system32\cmd.exe" /C vssadmin delete shadows /all /quiet
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:3476
            • C:\Windows\SysWOW64\vssadmin.exe
              vssadmin delete shadows /all /quiet
              3⤵
              • Interacts with shadow copies
              PID:2272
          • C:\Users\Admin\AppData\Local\Temp\Buran.exe
            "C:\Users\Admin\AppData\Local\Temp\Buran.exe" -agent 0
            2⤵
            • Drops file in Program Files directory
            PID:2184
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\system32\cmd.exe" /C C:\Users\Admin\AppData\Local\Temp\~temp001.bat
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:1364
            • C:\Windows\SysWOW64\Wbem\WMIC.exe
              wmic shadowcopy delete
              3⤵
              • Suspicious use of AdjustPrivilegeToken
              PID:672
            • C:\Windows\SysWOW64\vssadmin.exe
              vssadmin delete shadows /all /quiet
              3⤵
              • Interacts with shadow copies
              PID:3040
        • C:\Windows\system32\vssvc.exe
          C:\Windows\system32\vssvc.exe
          1⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1620

        Network

        MITRE ATT&CK Matrix ATT&CK v6

        Initial Access

        Execution

        Persistence

        Privilege Escalation

        Defense Evasion

        File Deletion

        2
        T1107

        Install Root Certificate

        1
        T1130

        Modify Registry

        1
        T1112

        Credential Access

        Discovery

        Query Registry

        1
        T1012

        Peripheral Device Discovery

        1
        T1120

        System Information Discovery

        1
        T1082

        Lateral Movement

        Collection

        Exfiltration

        Command and Control

        Web Service

        1
        T1102

        Impact

        Inhibit System Recovery

        2
        T1490

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Temp\~temp001.bat
          MD5

          ef572e2c7b1bbd57654b36e8dcfdc37a

          SHA1

          b84c4db6d0dfd415c289d0c8ae099aea4001e3b7

          SHA256

          e6e609db3f387f42bfd16dd9e5695ddc2b73d86ae12baf4f0dfc4edda4a96a64

          SHA512

          b8c014b242e8e8f42da37b75fe96c52cd25ebd366d0b5103bcba5ac041806d13142a62351edecdee583d494d2a120f9b330f6229b1b5fe820e1c7d98981089e9

          Download Submit
        • memory/188-4-0x0000000000000000-mapping.dmp
          Download
        • memory/196-5-0x0000000000000000-mapping.dmp
          Download
        • memory/672-12-0x0000000000000000-mapping.dmp
          Download
        • memory/1324-11-0x0000000000000000-mapping.dmp
          Download
        • memory/1364-7-0x0000000000000000-mapping.dmp
          Download
        • memory/2184-8-0x0000000000000000-mapping.dmp
          Download
        • memory/2272-10-0x0000000000000000-mapping.dmp
          Download
        • memory/2684-3-0x0000000000000000-mapping.dmp
          Download
        • memory/3040-13-0x0000000000000000-mapping.dmp
          Download
        • memory/3476-6-0x0000000000000000-mapping.dmp
          Download
        • memory/3608-2-0x0000000000000000-mapping.dmp
          Download