Overview

overview

10

Static

static

b0fa28ac0f...aa.exe

windows7_x64

10

b0fa28ac0f...aa.exe

windows10-2004_x64

8

Analysis

  • max time kernel
    152s
  • max time network
    140s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    20-05-2022 23:18

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General

  • Target

    b0fa28ac0f0657906df6312a22baf99111cbf27afeaab98c92eeba4b07fddeaa.exe

  • Size

    212KB

  • MD5

    3ac926d3bca5450ce48d10c253700ae4

  • SHA1

    0a918e434b1f8e125fb23a71c7317e6b16f3df23

  • SHA256

    b0fa28ac0f0657906df6312a22baf99111cbf27afeaab98c92eeba4b07fddeaa

  • SHA512

    ef62bc011a2fdff15b466f798bcbe5c4308e925fb1240d7621f65ede89432a329e00c80a917cc5be401b7029a2c5a497a9bc09436c3f1c05259a2e3479c581c5

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] 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: 410-0DD-8DB 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
  • Loads dropped DLL 2 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 5 IoCs
    evasionspywaretrojan
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 55 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b0fa28ac0f0657906df6312a22baf99111cbf27afeaab98c92eeba4b07fddeaa.exe
    "C:\Users\Admin\AppData\Local\Temp\b0fa28ac0f0657906df6312a22baf99111cbf27afeaab98c92eeba4b07fddeaa.exe"
    1⤵
    • Loads dropped DLL
    • Adds Run key to start application
    • Modifies system certificate store
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1976
    • 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
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:432
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /C wmic shadowcopy delete
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1944
        • C:\Windows\SysWOW64\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1996
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /C bcdedit /set {default} bootstatuspolicy ignoreallfailures
        3⤵
          PID:1484
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\system32\cmd.exe" /C bcdedit /set {default} recoveryenabled no
          3⤵
            PID:1060
          • 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:1748
          • 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:888
            • C:\Windows\SysWOW64\vssadmin.exe
              vssadmin delete shadows /all /quiet
              4⤵
              • Interacts with shadow copies
              PID:1548
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\system32\cmd.exe" /C vssadmin delete shadows /all /quiet
            3⤵
            • Suspicious use of WriteProcessMemory
            PID:1604
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\system32\cmd.exe" /C wbadmin delete catalog -quiet
            3⤵
              PID:1012
          • C:\Windows\SysWOW64\notepad.exe
            notepad.exe
            2⤵
            • Deletes itself
            PID:1336
        • C:\Windows\SysWOW64\Wbem\WMIC.exe
          wmic shadowcopy delete
          1⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1136
        • C:\Windows\SysWOW64\vssadmin.exe
          vssadmin delete shadows /all /quiet
          1⤵
          • Interacts with shadow copies
          PID:2024
        • C:\Windows\system32\vssvc.exe
          C:\Windows\system32\vssvc.exe
          1⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1948

        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
          Filesize

          728B

          MD5

          a8575668e1372b390fc48b66572a8037

          SHA1

          4485fa56ac88b088be6b6227c8373ca8123801f4

          SHA256

          9b6a9dc08bd9e4d17dccce4dbfb5e36ded90bfd9dbf3df5fdd150f1a42f2e129

          SHA512

          4e7495f9c3fb716f314991f98a93b424917f619e05bec0ee33af952d3b1f13253d8ba506178522ffb104e2704832653346055f36dbf4d06657d6c74f325b33dc

          Download Submit
        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\204C1AA6F6114E6A513754A2AB5760FA_8AE57F9FAAC778EA4099F469BEEE4C46
          Filesize

          472B

          MD5

          d3b21910cf775269669c13b1efd05bb9

          SHA1

          f88bc10b19fe1ba6ff79cdade3d1982c89b93415

          SHA256

          b74112546a623ecc82f35e55948c75034dcef590be00d112fc4650de8ffd0a1b

          SHA512

          e888e10841f0f9083c4a475022df388ddb7a42a817cb9fc46cdce4a9a349d67cdd2cc8a65d471b6cd0efd1ccc913a8d0f92c91c364d3c0d9f0bf03be8dc45dac

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        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015
          Filesize

          60KB

          MD5

          b9f21d8db36e88831e5352bb82c438b3

          SHA1

          4a3c330954f9f65a2f5fd7e55800e46ce228a3e2

          SHA256

          998e0209690a48ed33b79af30fc13851e3e3416bed97e3679b6030c10cab361e

          SHA512

          d4a2ac7c14227fbaf8b532398fb69053f0a0d913273f6917027c8cadbba80113fdbec20c2a7eb31b7bb57c99f9fdeccf8576be5f39346d8b564fc72fb1699476

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

          471B

          MD5

          c04f441d0220712231531a90823834db

          SHA1

          68dd18f1e0c51f1fdc4621394091a2dad08e4a08

          SHA256

          055641d3987ae98e2dd627d3214ea8084ae773a3df9592191b86977c752a29e7

          SHA512

          3156cf79585a45d919d4b27da4fe860f06e3206961fe1d20347ad74ef17de81c47857f35acd5cda3fae5ade28ab9747529ea3e8e79ca80aaf98e1f0e852bed53

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

          398B

          MD5

          e04f73bb9dbf89a18f40007200b963e9

          SHA1

          8ecab4cb9fde54fe28d95c83e917310fe20b0cf8

          SHA256

          bf22892db78123522eacf411937de8b793d349239db3bebfca05af3c8d8b51cc

          SHA512

          d6fff74f5858f9d4fa5068ac6073bd707592b2c33e59a78216d33d9e8fa5e5ae79fc0ff4b24e31143f8b936cd5de90cf72cf0c2dcf103bd52d281d0e720d79ce

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        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\204C1AA6F6114E6A513754A2AB5760FA_8AE57F9FAAC778EA4099F469BEEE4C46
          Filesize

          402B

          MD5

          79a8861d23f1eaccd73dda90042514ff

          SHA1

          d9b57418b358893b1d580e057896b2eb051e57e0

          SHA256

          5522d216934499b3ac24ce987d33f886eab6ba9c811372c4aa87d2ae65dac8ed

          SHA512

          dc45f615260d6145f4a3c37fab1ba1c4293024f35c8d58bda5cd4de0f9f751c56c721c26830d484b5f4f9cd804a0113616217e2132d7a1272d4ed56ef69eb224

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        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
          Filesize

          344B

          MD5

          53a0e50c7321583eed33f54802763209

          SHA1

          01fd8add730fb5717b59fa866625d4ade5a6df28

          SHA256

          273bc855e22124ad5255a057b822ffb7c051732c83416e28fbacfb387c607c02

          SHA512

          1f89612fe7dfd14eb2d05128aeacffe405b71bc4ced634da1789aeb688b0feed396e669ab00c60969e8c21ff348041ecb83b856a8aef56090f0e24992f05613d

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        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
          Filesize

          396B

          MD5

          38677a27cfb8628c1cfcfd64735aed55

          SHA1

          d4d82c2172a21e5bf9aef8ca169fa6343f5c48e5

          SHA256

          5aafaf609e452351069465d9205eaa2e2edfaec78c1c2538822ab1e7c6e44010

          SHA512

          92b0a4fcc9f68cfdd9c2d1ad44350c7e0f2e14ac8cf0a5854cda124caf90529aaaef879cbb22208afdab15f954710b663bea18c4a3d9735733fc89365a50677a

          Download Submit
        • C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\J2W67U9P\5USRIEZA.htm
          Filesize

          184B

          MD5

          b1cd7c031debba3a5c77b39b6791c1a7

          SHA1

          e5d91e14e9c685b06f00e550d9e189deb2075f76

          SHA256

          57ba053f075e0b80f747f3102ed985687c16a8754d109e7c4d33633269a36aaa

          SHA512

          d2bbefdc1effb52a38964c4cec5990a5a226248eca36f99e446c0c5704436f666bf1cb514e73b8991411d497d3325ecc646cbd5065c364e92ab6b9c5f1ad4a72

          Download Submit
        • C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\TXH4GM54\IED8J72Y.htm
          Filesize

          18KB

          MD5

          19cb5295e21160d78213d3ccc33b8f75

          SHA1

          d70bc890627b2dd33479eff5d2ffc8aff40a534b

          SHA256

          7810c957fdddcb7e1477957c0b1f6e90cbaf2bec084ede2a9aa5190d131084c8

          SHA512

          5b437b9055cdb29e0074fe493c2281af5f6bc4697e6f60d22329fa606c09bd4ffe8c0e50f98c2a12233eac00c480bc38ded1d8431ed771a4495955d865607c5e

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

          406B

          MD5

          ef572e2c7b1bbd57654b36e8dcfdc37a

          SHA1

          b84c4db6d0dfd415c289d0c8ae099aea4001e3b7

          SHA256

          e6e609db3f387f42bfd16dd9e5695ddc2b73d86ae12baf4f0dfc4edda4a96a64

          SHA512

          b8c014b242e8e8f42da37b75fe96c52cd25ebd366d0b5103bcba5ac041806d13142a62351edecdee583d494d2a120f9b330f6229b1b5fe820e1c7d98981089e9

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        • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\smss.exe
          Filesize

          212KB

          MD5

          3ac926d3bca5450ce48d10c253700ae4

          SHA1

          0a918e434b1f8e125fb23a71c7317e6b16f3df23

          SHA256

          b0fa28ac0f0657906df6312a22baf99111cbf27afeaab98c92eeba4b07fddeaa

          SHA512

          ef62bc011a2fdff15b466f798bcbe5c4308e925fb1240d7621f65ede89432a329e00c80a917cc5be401b7029a2c5a497a9bc09436c3f1c05259a2e3479c581c5

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

          212KB

          MD5

          3ac926d3bca5450ce48d10c253700ae4

          SHA1

          0a918e434b1f8e125fb23a71c7317e6b16f3df23

          SHA256

          b0fa28ac0f0657906df6312a22baf99111cbf27afeaab98c92eeba4b07fddeaa

          SHA512

          ef62bc011a2fdff15b466f798bcbe5c4308e925fb1240d7621f65ede89432a329e00c80a917cc5be401b7029a2c5a497a9bc09436c3f1c05259a2e3479c581c5

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

          212KB

          MD5

          3ac926d3bca5450ce48d10c253700ae4

          SHA1

          0a918e434b1f8e125fb23a71c7317e6b16f3df23

          SHA256

          b0fa28ac0f0657906df6312a22baf99111cbf27afeaab98c92eeba4b07fddeaa

          SHA512

          ef62bc011a2fdff15b466f798bcbe5c4308e925fb1240d7621f65ede89432a329e00c80a917cc5be401b7029a2c5a497a9bc09436c3f1c05259a2e3479c581c5

          Download Submit
        • \Users\Admin\AppData\Roaming\Microsoft\Windows\smss.exe
          Filesize

          212KB

          MD5

          3ac926d3bca5450ce48d10c253700ae4

          SHA1

          0a918e434b1f8e125fb23a71c7317e6b16f3df23

          SHA256

          b0fa28ac0f0657906df6312a22baf99111cbf27afeaab98c92eeba4b07fddeaa

          SHA512

          ef62bc011a2fdff15b466f798bcbe5c4308e925fb1240d7621f65ede89432a329e00c80a917cc5be401b7029a2c5a497a9bc09436c3f1c05259a2e3479c581c5

          Download Submit
        • \Users\Admin\AppData\Roaming\Microsoft\Windows\smss.exe
          Filesize

          212KB

          MD5

          3ac926d3bca5450ce48d10c253700ae4

          SHA1

          0a918e434b1f8e125fb23a71c7317e6b16f3df23

          SHA256

          b0fa28ac0f0657906df6312a22baf99111cbf27afeaab98c92eeba4b07fddeaa

          SHA512

          ef62bc011a2fdff15b466f798bcbe5c4308e925fb1240d7621f65ede89432a329e00c80a917cc5be401b7029a2c5a497a9bc09436c3f1c05259a2e3479c581c5

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        • memory/432-57-0x0000000000000000-mapping.dmp
          Download
        • memory/888-77-0x0000000000000000-mapping.dmp
          Download
        • memory/1012-75-0x0000000000000000-mapping.dmp
          Download
        • memory/1060-73-0x0000000000000000-mapping.dmp
          Download
        • memory/1136-85-0x0000000000000000-mapping.dmp
          Download
        • memory/1336-60-0x0000000000000000-mapping.dmp
          Download
        • memory/1484-74-0x0000000000000000-mapping.dmp
          Download
        • memory/1548-86-0x0000000000000000-mapping.dmp
          Download
        • memory/1604-76-0x0000000000000000-mapping.dmp
          Download
        • memory/1748-79-0x0000000000000000-mapping.dmp
          Download
        • memory/1944-72-0x0000000000000000-mapping.dmp
          Download
        • memory/1976-54-0x00000000750C1000-0x00000000750C3000-memory.dmp
          Filesize

          8KB

          Download
        • memory/1996-84-0x0000000000000000-mapping.dmp
          Download
        • memory/2024-82-0x0000000000000000-mapping.dmp
          Download