Overview

overview

10

Static

static

202010121236.scr

windows7_x64

10

202010121236.scr

windows10_x64

10

Analysis

  • max time kernel
    150s
  • max time network
    129s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    12-12-2020 14:46

Sharing

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General

  • Target

    202010121236.scr

  • Size

    449KB

  • MD5

    574f031251f67bcc6ea9168364d2fbfd

  • SHA1

    f5d6140140829eaa550d2ef57b3ca8281b3d79bb

  • SHA256

    438d83a22ed38bb2241a99b96d644826522b28327f63055840ee7632d8e95cd8

  • SHA512

    d7234b117aabb6a50e8619d4bc3a6d283c53d7a7ee396a67f73985d6e09156ab2fc89ec52bddbd949d9236ecde081cc0123719a474b12966a5beaf910de8a15b

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: yongloun@tutanota.com 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: wiruxa@airmail.cc Reserved email: anygrishevich@yandex.ru Your personal ID: 19F-A38-1A7 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

wiruxa@airmail.cc

anygrishevich@yandex.ru

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 23433 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 behavior: EnumeratesProcesses 7501 IoCs
  • Suspicious use of AdjustPrivilegeToken 89 IoCs
  • Suspicious use of WriteProcessMemory 42 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\202010121236.scr
    "C:\Users\Admin\AppData\Local\Temp\202010121236.scr" /S
    1⤵
    • Adds Run key to start application
    • Modifies system certificate store
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3968
    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\smss.exe
      "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\smss.exe" -start
      2⤵
      • Executes dropped EXE
      • Enumerates connected drives
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1568
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /C wmic shadowcopy delete
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1164
        • C:\Windows\SysWOW64\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:4000
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /C bcdedit /set {default} recoveryenabled no
        3⤵
          PID:800
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\system32\cmd.exe" /C bcdedit /set {default} bootstatuspolicy ignoreallfailures
          3⤵
            PID:1892
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\system32\cmd.exe" /C vssadmin delete shadows /all /quiet
            3⤵
            • Suspicious use of WriteProcessMemory
            PID:1632
            • C:\Windows\SysWOW64\vssadmin.exe
              vssadmin delete shadows /all /quiet
              4⤵
              • Interacts with shadow copies
              PID:3808
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\system32\cmd.exe" /C wbadmin delete catalog -quiet
            3⤵
              PID:2500
            • 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:3144
              • C:\Windows\SysWOW64\Wbem\WMIC.exe
                wmic shadowcopy delete
                4⤵
                • Suspicious use of AdjustPrivilegeToken
                PID:3492
              • C:\Windows\SysWOW64\vssadmin.exe
                vssadmin delete shadows /all /quiet
                4⤵
                • Interacts with shadow copies
                PID:3824
            • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\smss.exe
              "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\smss.exe" -agent 0
              3⤵
              • Executes dropped EXE
              • Drops file in Program Files directory
              PID:2224
          • C:\Windows\SysWOW64\notepad.exe
            notepad.exe
            2⤵
            • Deletes itself
            PID:4056
        • C:\Windows\system32\vssvc.exe
          C:\Windows\system32\vssvc.exe
          1⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1636

        Network

        MITRE ATT&CK Matrix ATT&CK v6

        Initial Access

        Execution

        Persistence

        Registry Run Keys / Startup Folder

        1
        T1060

        Privilege Escalation

        Defense Evasion

        File Deletion

        2
        T1107

        Modify Registry

        2
        T1112

        Install Root Certificate

        1
        T1130

        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\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3F26ED5DE6B4E859CCCA6035ECB8D9CB
          MD5

          85934f14cc9248f76c58dc21180b4f15

          SHA1

          5ae41d9bea1cd413260de621f2302febd1e00323

          SHA256

          0d0b47c2e46b455f2d5b2bc0893585790da8a86e36f4a45311bf0a579a5efe58

          SHA512

          8496972fcf149a5df72b1a9aef3865c27fe0b9cba9e3af03b0a562c8b64a89d8834a3c18008d1610fab0741decadfdb1c14f9c1b9d1307bbb23a0b6a148b5e88

          Download Submit
        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\204C1AA6F6114E6A513754A2AB5760FA_0673414C08DE7F919AE3F6C4CC65AEEE
          MD5

          4bddfe3851f7aa064be1b88af5e4516d

          SHA1

          2619398420a8e45f8f68c7c02ff2fd8c5ae3f18a

          SHA256

          1427416bef65c2419a8fc224206c5131d6d7b391bc74faae87859640ce0fc3dc

          SHA512

          1874f93cc946fe5a1f1852f0bb740247cb8835993d7cd217e1347af794b6f606c9ad9c1b6b0604c229296d170961c88d0b31824b9f854d326fe8b10557e84040

          Download Submit
        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
          MD5

          a54e6020d8dade29e93e679d7d067676

          SHA1

          1ff53fa146566b3dc7a4dc43c91650a89b0bca5f

          SHA256

          3762d5141f299aa6d5bb5197aa8459d1741a4602c875a14531b77ebc861c7bbb

          SHA512

          87da29500b7ca80c15eea68253298c50073e2c643aae474b700ddd8117f7eac6bd53fc9a5358aa2bebe513e2041ca101337a13f21f0ef16450607ecc7f57b43d

          Download Submit
        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3F26ED5DE6B4E859CCCA6035ECB8D9CB
          MD5

          536fabec01b5468297439924797a08b2

          SHA1

          f82ad6cbfbe57f62154202914fb01c746a9026e2

          SHA256

          92722fab94aba4e2c962c8def95eca9ca800b595de3364cc6a5c1714075933c6

          SHA512

          a227b5bcb573770f9550f5bb368d988dd41669a54dfe0dcba536b69b7e5b66e5edf0a56e35cd8a58edff205e2cf56703e6444b58c1a870ab7dc34d422082c72b

          Download Submit
        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\204C1AA6F6114E6A513754A2AB5760FA_0673414C08DE7F919AE3F6C4CC65AEEE
          MD5

          51472043ba6da4db45fe610a693bdc7a

          SHA1

          9eda4cf22579b576bc33a8c62dc8d819df2cdc07

          SHA256

          6709f446d868fb3dc980b61356c3b2235c56bca73276bad7f0e20bc156f92d15

          SHA512

          3dd35f945d87bd15e7b11ce3de92a55befa2e552a9a94260c1c966cc07232088781840ae776fd22096aef2af5a5227c261fd6eb6e1775202452297e42349cd7e

          Download Submit
        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
          MD5

          202132b0da2d66b2656487e81cae2bee

          SHA1

          9fc18cb7e5a9727bc2660f169853e3cd678cb381

          SHA256

          7a59d551a42f353a88fce6c4f39dd293771f48e626d0763e5881a3b2df7cfb0b

          SHA512

          02bd3a7eadc3d412658c5b438900c72b2daef6d40fdf18bd70eb44c163753b623e1fe826250d8798f21dcab5ecc9f40a2caa32c9e803d0475f02446966d6b839

          Download Submit
        • C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\JGAO043J\6QJH1LJA.htm
          MD5

          6b17a59cec1a7783febae9aa55c56556

          SHA1

          01d4581e2b3a6348679147a915a0b22b2a66643a

          SHA256

          66987b14b90d41632be98836f9601b12e7f329ffab05595887889c9c5716fbeb

          SHA512

          3337efd12b9c06b7768eb928a78caae243b75257c5aabe7a49e908a2f735af55f7257a40bd2330dc13865ead18ed805b54a6c5105740fdcbbaccacf7997bcbc3

          Download Submit
        • C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\S7PGJ114\36ZXXHIX.htm
          MD5

          b1cd7c031debba3a5c77b39b6791c1a7

          SHA1

          e5d91e14e9c685b06f00e550d9e189deb2075f76

          SHA256

          57ba053f075e0b80f747f3102ed985687c16a8754d109e7c4d33633269a36aaa

          SHA512

          d2bbefdc1effb52a38964c4cec5990a5a226248eca36f99e446c0c5704436f666bf1cb514e73b8991411d497d3325ecc646cbd5065c364e92ab6b9c5f1ad4a72

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

          ef572e2c7b1bbd57654b36e8dcfdc37a

          SHA1

          b84c4db6d0dfd415c289d0c8ae099aea4001e3b7

          SHA256

          e6e609db3f387f42bfd16dd9e5695ddc2b73d86ae12baf4f0dfc4edda4a96a64

          SHA512

          b8c014b242e8e8f42da37b75fe96c52cd25ebd366d0b5103bcba5ac041806d13142a62351edecdee583d494d2a120f9b330f6229b1b5fe820e1c7d98981089e9

          Download Submit
        • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\smss.exe
          MD5

          574f031251f67bcc6ea9168364d2fbfd

          SHA1

          f5d6140140829eaa550d2ef57b3ca8281b3d79bb

          SHA256

          438d83a22ed38bb2241a99b96d644826522b28327f63055840ee7632d8e95cd8

          SHA512

          d7234b117aabb6a50e8619d4bc3a6d283c53d7a7ee396a67f73985d6e09156ab2fc89ec52bddbd949d9236ecde081cc0123719a474b12966a5beaf910de8a15b

          Download Submit
        • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\smss.exe
          MD5

          574f031251f67bcc6ea9168364d2fbfd

          SHA1

          f5d6140140829eaa550d2ef57b3ca8281b3d79bb

          SHA256

          438d83a22ed38bb2241a99b96d644826522b28327f63055840ee7632d8e95cd8

          SHA512

          d7234b117aabb6a50e8619d4bc3a6d283c53d7a7ee396a67f73985d6e09156ab2fc89ec52bddbd949d9236ecde081cc0123719a474b12966a5beaf910de8a15b

          Download Submit
        • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\smss.exe
          MD5

          574f031251f67bcc6ea9168364d2fbfd

          SHA1

          f5d6140140829eaa550d2ef57b3ca8281b3d79bb

          SHA256

          438d83a22ed38bb2241a99b96d644826522b28327f63055840ee7632d8e95cd8

          SHA512

          d7234b117aabb6a50e8619d4bc3a6d283c53d7a7ee396a67f73985d6e09156ab2fc89ec52bddbd949d9236ecde081cc0123719a474b12966a5beaf910de8a15b

          Download Submit
        • memory/800-16-0x0000000000000000-mapping.dmp
          Download
        • memory/1164-15-0x0000000000000000-mapping.dmp
          Download
        • memory/1568-2-0x0000000000000000-mapping.dmp
          Download
        • memory/1632-19-0x0000000000000000-mapping.dmp
          Download
        • memory/1892-17-0x0000000000000000-mapping.dmp
          Download
        • memory/2224-21-0x0000000000000000-mapping.dmp
          Download
        • memory/2500-18-0x0000000000000000-mapping.dmp
          Download
        • memory/3144-20-0x0000000000000000-mapping.dmp
          Download
        • memory/3492-25-0x0000000000000000-mapping.dmp
          Download
        • memory/3808-26-0x0000000000000000-mapping.dmp
          Download
        • memory/3824-27-0x0000000000000000-mapping.dmp
          Download
        • memory/4000-23-0x0000000000000000-mapping.dmp
          Download
        • memory/4056-4-0x0000000003000000-0x0000000003001000-memory.dmp
          Filesize

          4KB

          Download
        • memory/4056-6-0x0000000000000000-mapping.dmp
          Download