Overview

overview

10

Static

static

10

1.bin/1.exe

windows10_x64

10

2019-09-02...10.exe

windows10_x64

10

31.exe

windows10_x64

10

3DMark 11 ...on.exe

windows10_x64

1

5da0116af4...18.exe

windows10_x64

10

Archive.zi...3e.exe

windows10_x64

6

CVE-2018-1...oC.swf

windows10_x64

3

CVWSHSetup...1].exe

windows10_x64

4

DiskIntern...en.exe

windows10_x64

1

ForceOp 2....ce.exe

windows10_x64

10

HYDRA.exe

windows10_x64

10

Keygen.exe

windows10_x64

10

Lonelyscre...ox.exe

windows10_x64

1

LtHv0O2KZDK4M637.exe

windows10_x64

10

Magic_File...ja.exe

windows10_x64

1

OnlineInstaller.exe

windows10_x64

10

Remouse.Mi...cg.exe

windows10_x64

1

SecurityTa...up.exe

windows10_x64

8

Treasure.V...ox.exe

windows10_x64

1

VyprVPN.exe

windows10_x64

10

WSHSetup[1].exe

windows10_x64

3

___ _ ____...��.exe

windows10_x64

10

___ _ ____...��.exe

windows10_x64

10

amtemu.v0....ed.exe

windows10_x64

10

api.exe

windows10_x64

1

default.exe

windows10_x64

10

efd97b1038...ea4.js

windows10_x64

3

good.exe

windows10_x64

10

infected d...er.exe

windows10_x64

8

oof.exe

windows10_x64

10

ou55sg33s_1.exe

windows10_x64

10

update.exe

windows10_x64

10

Resubmissions

12-11-2021 18:04

211112-wnzb8aahhm 10

19-11-2020 10:08

201119-rhwlt38jrx 10

18-11-2020 17:26

201118-htd4fq29va 10

Analysis

  • max time kernel
    259s
  • max time network
    301s
  • platform
    windows10_x64
  • resource
    win10-en-20211104
  • submitted
    12-11-2021 18:04

Sharing

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General

  • Target

    default.exe

  • Size

    211KB

  • MD5

    f42abb7569dbc2ff5faa7e078cb71476

  • SHA1

    04530a6165fc29ab536bab1be16f6b87c46288e6

  • SHA256

    516475caf3fbd1f0c0283572550528f1f9e7b502dce5fb6b89d40f366a150bfd

  • SHA512

    3277534a02435538e144dea3476416e1d9117fcddef3dcb4379b82f33516c3e87767c3b0d2b880e61a3d803b583c96d772a0bdeecbfc109fe66444e9b29216af

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] or [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: 137-003-116 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
  • Deletes itself 1 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 1 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 50 IoCs
  • Suspicious use of WriteProcessMemory 48 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\default.exe
    "C:\Users\Admin\AppData\Local\Temp\default.exe"
    1⤵
    • Adds Run key to start application
    • Modifies system certificate store
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4244
    • 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 AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4392
      • 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:3672
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /C bcdedit /set {default} bootstatuspolicy ignoreallfailures
        3⤵
          PID:592
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\system32\cmd.exe" /C bcdedit /set {default} recoveryenabled no
          3⤵
            PID:1000
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\system32\cmd.exe" /C wbadmin delete catalog -quiet
            3⤵
              PID:1056
            • C:\Windows\SysWOW64\cmd.exe
              "C:\Windows\system32\cmd.exe" /C wbadmin delete systemstatebackup
              3⤵
                PID:1252
              • C:\Windows\SysWOW64\cmd.exe
                "C:\Windows\system32\cmd.exe" /C wbadmin delete systemstatebackup -keepversions:0
                3⤵
                  PID:1500
                • C:\Windows\SysWOW64\cmd.exe
                  "C:\Windows\system32\cmd.exe" /C wbadmin delete backup
                  3⤵
                    PID:1732
                  • C:\Windows\SysWOW64\cmd.exe
                    "C:\Windows\system32\cmd.exe" /C wmic shadowcopy delete
                    3⤵
                    • Suspicious use of WriteProcessMemory
                    PID:2076
                    • C:\Windows\SysWOW64\Wbem\WMIC.exe
                      wmic shadowcopy delete
                      4⤵
                      • Suspicious use of AdjustPrivilegeToken
                      PID:2620
                  • C:\Windows\SysWOW64\cmd.exe
                    "C:\Windows\system32\cmd.exe" /C vssadmin delete shadows /all /quiet
                    3⤵
                    • Suspicious use of WriteProcessMemory
                    PID:3792
                    • C:\Windows\SysWOW64\vssadmin.exe
                      vssadmin delete shadows /all /quiet
                      4⤵
                      • Interacts with shadow copies
                      PID:1884
                  • C:\Windows\SysWOW64\notepad.exe
                    notepad.exe
                    3⤵
                      PID:4616
                  • C:\Windows\SysWOW64\notepad.exe
                    notepad.exe
                    2⤵
                    • Deletes itself
                    PID:4360
                • C:\Windows\system32\vssvc.exe
                  C:\Windows\system32\vssvc.exe
                  1⤵
                  • Suspicious use of AdjustPrivilegeToken
                  PID:3172

                Network

                MITRE ATT&CK Enterprise v6

                Replay Monitor

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                Downloads

                • memory/4360-130-0x00000000003B0000-0x00000000003B1000-memory.dmp

                  Filesize

                  4KB

                  Download

                • memory/4616-164-0x0000000000B40000-0x0000000000B41000-memory.dmp

                  Filesize

                  4KB

                  Download