Overview

overview

10

Static

static

8

70ca11d0df...2d.exe

windows7_x64

10

70ca11d0df...2d.exe

windows10_x64

10

Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    19-02-2021 04:00

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General

  • Target

    70ca11d0dfb726a0c141e05253a1b42d.exe

  • Size

    581KB

  • MD5

    70ca11d0dfb726a0c141e05253a1b42d

  • SHA1

    3b8ff05941e2acebf7fc071c70b18ea9da83326b

  • SHA256

    0b3e8b562e8fe50b6039db8d1f3871bdf6f9d1f9246ab7459eb91844bcbc8bd6

  • SHA512

    dc08a9d20e5fc789a1ffab9f9b2cd136bdc9e61f44f6c9ee06b0ae15495db9a1bf340b4d75fb393eadce75fc1cdfb7cb6f80cce525e4850305ea5b0906850478

Score
10/10
buranpersistenceransomwareupx

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: kassmaster@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: kassmaster@tutanota.com Reserved email: kassmaster@danwin1210.me Your personal ID: F88-77F-E2B 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

kassmaster@tutanota.com

kassmaster@danwin1210.me

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
  • UPX packed file 3 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

    upx
  • 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 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 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 42 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\70ca11d0dfb726a0c141e05253a1b42d.exe
    "C:\Users\Admin\AppData\Local\Temp\70ca11d0dfb726a0c141e05253a1b42d.exe"
    1⤵
    • Adds Run key to start application
    • Modifies system certificate store
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1400
    • 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:3700
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /C wmic shadowcopy delete
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1120
        • C:\Windows\SysWOW64\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:3960
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /C bcdedit /set {default} recoveryenabled no
        3⤵
          PID:4000
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\system32\cmd.exe" /C bcdedit /set {default} bootstatuspolicy ignoreallfailures
          3⤵
            PID:4040
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\system32\cmd.exe" /C vssadmin delete shadows /all /quiet
            3⤵
            • Suspicious use of WriteProcessMemory
            PID:3804
            • C:\Windows\SysWOW64\vssadmin.exe
              vssadmin delete shadows /all /quiet
              4⤵
              • Interacts with shadow copies
              PID:4004
          • 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:3472
            • C:\Windows\SysWOW64\Wbem\WMIC.exe
              wmic shadowcopy delete
              4⤵
              • Suspicious use of AdjustPrivilegeToken
              PID:3016
            • C:\Windows\SysWOW64\vssadmin.exe
              vssadmin delete shadows /all /quiet
              4⤵
              • Interacts with shadow copies
              PID:3640
          • 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:1892
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\system32\cmd.exe" /C wbadmin delete catalog -quiet
            3⤵
              PID:2084
          • C:\Windows\SysWOW64\notepad.exe
            notepad.exe
            2⤵
            • Deletes itself
            PID:2912
        • C:\Windows\system32\vssvc.exe
          C:\Windows\system32\vssvc.exe
          1⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2244

        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

        2
        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

          de45a65ca84a9d847a105fcf5db17d4d

          SHA1

          7e9bf35371fa3ceb195e2b2ab9a55be036464e1f

          SHA256

          35f6afd87526003ea4433d30b8561609d3af244d4602acc30e8b491a30b51694

          SHA512

          f60e252ffabb64a1b5413e02cd46c10df3cfacadd4051ac50674f79c834cd5607bf49660d57665b18fd86e6b493411afe17668b2cbd131bfeeae954dd2da52d8

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

          25702f32850469ed11d3cd68086b8e48

          SHA1

          170ace58972fae2bbc1f254631c95c1ccf7388ff

          SHA256

          42bf99c6490ec13de964fd7e4eaafc5df9f95a87b92f65e2cac8e18a79954411

          SHA512

          2d121b1442dd4b449c5bafb9bd295a0f15f02aba9030e4571e258420779431cd6dbec11c867284f8ae84f69a1c7b032110e9fab89ab75456f77b6d7aed74706b

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

          1217ab0d20378cd200fbe07bedb5ee7b

          SHA1

          b10c62032206809cc18abab57a26bd1916005ce0

          SHA256

          d772cb57e040249255d60d6265daabaf009303399dde95f7e37093a4d0e7b613

          SHA512

          732d0f36070083b88f340ee9831672cdaaad55a2052b2833096264c81441da5b1c5e8b327ab2549d19fd50517aad95b0a98a6af5f2aeb218e1a97970bb2188bb

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

          3db6ecad94f78ad84cdb3cbfaae9e94e

          SHA1

          1917d09d2ec4786134a8043e014da59973145565

          SHA256

          12964fd0ca8cb6830fdfbfc5aa99c0ff6dcd251887850e56eeb70aa73dbf2db7

          SHA512

          00937e4a18d2f1e50859acd86000a2c7353d9886358a2dc37b0b9d361bc7f782b50278a0ec75900da387294bea7a6bd9acb39ce8df4b1e2e1fcc09f1057e6b0b

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

          8b23efbd4e1b291ccb2e7099b5a8d6f4

          SHA1

          060e4c86f03ff22c7b5125a71d1bef64c5abe6df

          SHA256

          0ccbfcf507251505845bd670a8c4eb90671ee076fd0931923ce5cf3bff20e2fe

          SHA512

          4a8f8a5291be668f63a0e68d8fb66eaf01160278f3746ef04ac6521eb3d17dd6cca1b64aafe9652181a8a2e16f1c6c4853ceb0b99b81fc559226d8069fed45e5

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

          f17a4733f39987fc6372f71b82b81c40

          SHA1

          06a1a9dd1c36a32569a44746a118262dfe746ee5

          SHA256

          914839458f10a35de614c1709586b1e5a7e2eb97418bcd32ecb50729d04fef44

          SHA512

          ceed1a0fb5ec1ad8b66c0198edf6010a66aaca30b6ee0364224a23ceb17453751e0be10eab552f46db8882c270c48e1d434aec7cd77a49dccd61e0a3c238b15d

          Download Submit
        • C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\RW8YYLAG\LX1MQO3T.htm
          MD5

          b1cd7c031debba3a5c77b39b6791c1a7

          SHA1

          e5d91e14e9c685b06f00e550d9e189deb2075f76

          SHA256

          57ba053f075e0b80f747f3102ed985687c16a8754d109e7c4d33633269a36aaa

          SHA512

          d2bbefdc1effb52a38964c4cec5990a5a226248eca36f99e446c0c5704436f666bf1cb514e73b8991411d497d3325ecc646cbd5065c364e92ab6b9c5f1ad4a72

          Download Submit
        • C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\UOAPEAJQ\15H3386D.htm
          MD5

          8615e70875c2cc0b9db16027b9adf11d

          SHA1

          4ed62cf405311c0ff562a3c59334a15ddc4f1bf9

          SHA256

          da96949ba6b0567343f144486505c8c8fa1d892fd88c9cbc3ef3d751a570724d

          SHA512

          cd9dfc88dc2af9438b7d6b618d1b62029b3bdf739fc4daa5b37397afd12c4528561b3bf2fc3f3f2adf3fd1f582d5524332441fd30248fcd078e41aa91e17cb73

          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

          70ca11d0dfb726a0c141e05253a1b42d

          SHA1

          3b8ff05941e2acebf7fc071c70b18ea9da83326b

          SHA256

          0b3e8b562e8fe50b6039db8d1f3871bdf6f9d1f9246ab7459eb91844bcbc8bd6

          SHA512

          dc08a9d20e5fc789a1ffab9f9b2cd136bdc9e61f44f6c9ee06b0ae15495db9a1bf340b4d75fb393eadce75fc1cdfb7cb6f80cce525e4850305ea5b0906850478

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

          70ca11d0dfb726a0c141e05253a1b42d

          SHA1

          3b8ff05941e2acebf7fc071c70b18ea9da83326b

          SHA256

          0b3e8b562e8fe50b6039db8d1f3871bdf6f9d1f9246ab7459eb91844bcbc8bd6

          SHA512

          dc08a9d20e5fc789a1ffab9f9b2cd136bdc9e61f44f6c9ee06b0ae15495db9a1bf340b4d75fb393eadce75fc1cdfb7cb6f80cce525e4850305ea5b0906850478

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

          70ca11d0dfb726a0c141e05253a1b42d

          SHA1

          3b8ff05941e2acebf7fc071c70b18ea9da83326b

          SHA256

          0b3e8b562e8fe50b6039db8d1f3871bdf6f9d1f9246ab7459eb91844bcbc8bd6

          SHA512

          dc08a9d20e5fc789a1ffab9f9b2cd136bdc9e61f44f6c9ee06b0ae15495db9a1bf340b4d75fb393eadce75fc1cdfb7cb6f80cce525e4850305ea5b0906850478

          Download Submit
        • memory/1120-16-0x0000000000000000-mapping.dmp
          Download
        • memory/1892-22-0x0000000000000000-mapping.dmp
          Download
        • memory/2084-19-0x0000000000000000-mapping.dmp
          Download
        • memory/2912-5-0x0000000000580000-0x0000000000581000-memory.dmp
          Filesize

          4KB

          Download
        • memory/2912-6-0x0000000000000000-mapping.dmp
          Download
        • memory/3016-27-0x0000000000000000-mapping.dmp
          Download
        • memory/3472-21-0x0000000000000000-mapping.dmp
          Download
        • memory/3640-28-0x0000000000000000-mapping.dmp
          Download
        • memory/3700-2-0x0000000000000000-mapping.dmp
          Download
        • memory/3804-20-0x0000000000000000-mapping.dmp
          Download
        • memory/3960-26-0x0000000000000000-mapping.dmp
          Download
        • memory/4000-17-0x0000000000000000-mapping.dmp
          Download
        • memory/4004-25-0x0000000000000000-mapping.dmp
          Download
        • memory/4040-18-0x0000000000000000-mapping.dmp
          Download