Analysis

  • max time kernel
    151s
  • max time network
    131s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    29-12-2020 01:52

General

  • Target

    1016366f5a33b98470c591bda8b65c421c2bfc690aa9fd51d8049abd605c0070.exe

  • Size

    2.7MB

  • MD5

    4301b4d1cb937816ffe288401d8938bf

  • SHA1

    14126bcc7b1a7ec96114fb28a74c6a4d7e008246

  • SHA256

    1016366f5a33b98470c591bda8b65c421c2bfc690aa9fd51d8049abd605c0070

  • SHA512

    82b0ebf62016f0b578384858b4d88fa97c70022a6e5e67871d93da5de2777553f949d40e6968ab9755cec4b48c8e40bdbc2ef4a1bd7a2db3ce52070e12b292bd

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@danwin1210.me 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@danwin1210.me Reserved email: kassmaster@tutanota.com Your personal ID: 12B-487-530 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@danwin1210.me

kassmaster@tutanota.com

Signatures

  • Buran

    Ransomware-as-a-service based on the VegaLocker family first identified in 2019.

  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Executes dropped EXE 2 IoCs
  • Deletes itself 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • 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 12667 IoCs
  • Interacts with shadow copies 2 TTPs 2 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

  • Modifies system certificate store 2 TTPs 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 85 IoCs
  • Suspicious use of WriteProcessMemory 55 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1016366f5a33b98470c591bda8b65c421c2bfc690aa9fd51d8049abd605c0070.exe
    "C:\Users\Admin\AppData\Local\Temp\1016366f5a33b98470c591bda8b65c421c2bfc690aa9fd51d8049abd605c0070.exe"
    1⤵
    • Loads dropped DLL
    • Adds Run key to start application
    • Modifies system certificate store
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1376
    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\csrss.exe
      "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\csrss.exe" -start
      2⤵
      • Executes dropped EXE
      • Enumerates connected drives
      • Modifies system certificate store
      • Suspicious use of WriteProcessMemory
      PID:744
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /C wmic shadowcopy delete
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1608
        • C:\Windows\SysWOW64\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:628
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /C bcdedit /set {default} recoveryenabled no
        3⤵
          PID:1712
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\system32\cmd.exe" /C bcdedit /set {default} bootstatuspolicy ignoreallfailures
          3⤵
            PID:1020
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\system32\cmd.exe" /C wbadmin delete catalog -quiet
            3⤵
              PID:964
            • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\csrss.exe
              "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\csrss.exe" -agent 0
              3⤵
              • Executes dropped EXE
              • Drops file in Program Files directory
              PID:952
            • 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:1172
              • C:\Windows\SysWOW64\Wbem\WMIC.exe
                wmic shadowcopy delete
                4⤵
                • Suspicious use of AdjustPrivilegeToken
                PID:920
              • C:\Windows\SysWOW64\vssadmin.exe
                vssadmin delete shadows /all /quiet
                4⤵
                • Interacts with shadow copies
                PID:864
            • C:\Windows\SysWOW64\cmd.exe
              "C:\Windows\system32\cmd.exe" /C vssadmin delete shadows /all /quiet
              3⤵
              • Suspicious use of WriteProcessMemory
              PID:860
              • C:\Windows\SysWOW64\vssadmin.exe
                vssadmin delete shadows /all /quiet
                4⤵
                • Interacts with shadow copies
                PID:1296
          • C:\Windows\SysWOW64\notepad.exe
            notepad.exe
            2⤵
            • Deletes itself
            PID:1088
        • C:\Windows\system32\vssvc.exe
          C:\Windows\system32\vssvc.exe
          1⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1640

        Network

        MITRE ATT&CK Matrix ATT&CK v6

        Persistence

        Registry Run Keys / Startup Folder

        1
        T1060

        Defense Evasion

        File Deletion

        2
        T1107

        Modify Registry

        2
        T1112

        Install Root Certificate

        1
        T1130

        Discovery

        Query Registry

        1
        T1012

        Peripheral Device Discovery

        1
        T1120

        System Information Discovery

        1
        T1082

        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

          61466c45ced4d83183fdb25396d4031c

          SHA1

          28a0f84a224cfddee721d7aa7cc5b54176358108

          SHA256

          1c3119bf6b52b905a989b256f6d40bf6d0150eb5485f5c416362a439e620e4f9

          SHA512

          152535df0af05a287d4435e702c9fc86195e61296e825b9bd67311054524bbeeb898aa4b23393c5af5d4f5fa2471fbe56b3d85964036d22b5ba751c8b3423e9c

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

          21ef137d48d04fc9be98c2674223aa7d

          SHA1

          2c596c1c53112a535400e16fe124987aa665055c

          SHA256

          d265ed9b6513b4a1bc4b7b26f3f59b1ed4d0cf1aeb37bc0d38ec91b4658cc0e0

          SHA512

          f95cf62b52edf668adf1779d07bde1c68c29b848ec713270111b3fa2bc01edbdbbc5cfc958229c6e92567f4196285e935a2f922bbdcac80f9103ba15e832491a

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

          9d7369bfa72ae89d1d752ba17df6c22e

          SHA1

          ec6dad338b059d7bffbf47f84cf3c638226a0d82

          SHA256

          8ba91b47832e7c92ce4aec0255ae6511d12f7f92201d8d1db21d37f81a190030

          SHA512

          3cc58981fdaffa95022fbf13d7b0535ef0d1700fffda235a46902f9b9d9ac83458d8444aedae99b8392ee62d0151eea5f67d991bf538aa0919fcd5b6f7ae41f5

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

          bfa8f146b8e4b0bc602a3b911b74a10d

          SHA1

          83ae143ff3a8afc7fab91ddb7e67104696518dfc

          SHA256

          26b1f0df9830c129deedd3eddf3f98c8d84c442e65ed74de4ca4b39ba5c405fa

          SHA512

          11c1a23b71075c03313d9ff5f2ce8cb92250fe3048499c8c90ce0be182a0bb73a9a67fd1865eae36418e5f5aea8b7fdf47462b9323933feeb68452c233995c28

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

          cbdff8e3f8930080454e4af43c250d67

          SHA1

          6a2f793c8fea7035c4f0475bf17ae83cae12a88f

          SHA256

          e336d536b227024d4cfe5d20077405444e3f523e013fd6b5e22837269c1ffe5d

          SHA512

          2ce4f3824b575fac3642e85db705c030a18b01be94bd839fcd02339f1ae924d96ddf62a045f1d8aa1b2fb27fa04a746d50472238fd420fcb8350d3439066fb90

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
          MD5

          1848c039b553e41b866afb3b37181c9f

          SHA1

          9971c22127f630edef3350e420cdfd53c0eb738a

          SHA256

          4cdd2051c8fda214d16b4fea38f15cecb4e9ac987ebc64b927925dcf164bbf26

          SHA512

          bbcb253997f1182f2ce1d039bd0f29cef833a2923844b5ac1dbe3d718035f03590fa993872226910e9d257ff2d1d4d0d53e52d19fc4e3be1a874c87bb2e33e06

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

          ad44806829628106b34b720e2ea3eba4

          SHA1

          d18682a8ae454846a2f7daf972b55d91b0627266

          SHA256

          0687275b365c90f0a10130d0bb5cc5723e2527ab81f81792ea332a0358ca3db9

          SHA512

          1cc8894f2745b88e2bbc24025b65666bb5fd4a82d2d12bbb60313fc5167983da3d23897bc186d97a4f82e63b7d4d0bea0190757209b1c2b08b22f251a599e735

        • C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\3O0J2C38\CJV9S6QC.htm
          MD5

          8615e70875c2cc0b9db16027b9adf11d

          SHA1

          4ed62cf405311c0ff562a3c59334a15ddc4f1bf9

          SHA256

          da96949ba6b0567343f144486505c8c8fa1d892fd88c9cbc3ef3d751a570724d

          SHA512

          cd9dfc88dc2af9438b7d6b618d1b62029b3bdf739fc4daa5b37397afd12c4528561b3bf2fc3f3f2adf3fd1f582d5524332441fd30248fcd078e41aa91e17cb73

        • C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\7ISB2KAC\OM5ATRI4.htm
          MD5

          b1cd7c031debba3a5c77b39b6791c1a7

          SHA1

          e5d91e14e9c685b06f00e550d9e189deb2075f76

          SHA256

          57ba053f075e0b80f747f3102ed985687c16a8754d109e7c4d33633269a36aaa

          SHA512

          d2bbefdc1effb52a38964c4cec5990a5a226248eca36f99e446c0c5704436f666bf1cb514e73b8991411d497d3325ecc646cbd5065c364e92ab6b9c5f1ad4a72

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

          ef572e2c7b1bbd57654b36e8dcfdc37a

          SHA1

          b84c4db6d0dfd415c289d0c8ae099aea4001e3b7

          SHA256

          e6e609db3f387f42bfd16dd9e5695ddc2b73d86ae12baf4f0dfc4edda4a96a64

          SHA512

          b8c014b242e8e8f42da37b75fe96c52cd25ebd366d0b5103bcba5ac041806d13142a62351edecdee583d494d2a120f9b330f6229b1b5fe820e1c7d98981089e9

        • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\csrss.exe
          MD5

          4301b4d1cb937816ffe288401d8938bf

          SHA1

          14126bcc7b1a7ec96114fb28a74c6a4d7e008246

          SHA256

          1016366f5a33b98470c591bda8b65c421c2bfc690aa9fd51d8049abd605c0070

          SHA512

          82b0ebf62016f0b578384858b4d88fa97c70022a6e5e67871d93da5de2777553f949d40e6968ab9755cec4b48c8e40bdbc2ef4a1bd7a2db3ce52070e12b292bd

        • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\csrss.exe
          MD5

          4301b4d1cb937816ffe288401d8938bf

          SHA1

          14126bcc7b1a7ec96114fb28a74c6a4d7e008246

          SHA256

          1016366f5a33b98470c591bda8b65c421c2bfc690aa9fd51d8049abd605c0070

          SHA512

          82b0ebf62016f0b578384858b4d88fa97c70022a6e5e67871d93da5de2777553f949d40e6968ab9755cec4b48c8e40bdbc2ef4a1bd7a2db3ce52070e12b292bd

        • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\csrss.exe
          MD5

          4301b4d1cb937816ffe288401d8938bf

          SHA1

          14126bcc7b1a7ec96114fb28a74c6a4d7e008246

          SHA256

          1016366f5a33b98470c591bda8b65c421c2bfc690aa9fd51d8049abd605c0070

          SHA512

          82b0ebf62016f0b578384858b4d88fa97c70022a6e5e67871d93da5de2777553f949d40e6968ab9755cec4b48c8e40bdbc2ef4a1bd7a2db3ce52070e12b292bd

        • \Users\Admin\AppData\Roaming\Microsoft\Windows\csrss.exe
          MD5

          4301b4d1cb937816ffe288401d8938bf

          SHA1

          14126bcc7b1a7ec96114fb28a74c6a4d7e008246

          SHA256

          1016366f5a33b98470c591bda8b65c421c2bfc690aa9fd51d8049abd605c0070

          SHA512

          82b0ebf62016f0b578384858b4d88fa97c70022a6e5e67871d93da5de2777553f949d40e6968ab9755cec4b48c8e40bdbc2ef4a1bd7a2db3ce52070e12b292bd

        • \Users\Admin\AppData\Roaming\Microsoft\Windows\csrss.exe
          MD5

          4301b4d1cb937816ffe288401d8938bf

          SHA1

          14126bcc7b1a7ec96114fb28a74c6a4d7e008246

          SHA256

          1016366f5a33b98470c591bda8b65c421c2bfc690aa9fd51d8049abd605c0070

          SHA512

          82b0ebf62016f0b578384858b4d88fa97c70022a6e5e67871d93da5de2777553f949d40e6968ab9755cec4b48c8e40bdbc2ef4a1bd7a2db3ce52070e12b292bd

        • memory/628-29-0x0000000000000000-mapping.dmp
        • memory/744-5-0x0000000000000000-mapping.dmp
        • memory/860-22-0x0000000000000000-mapping.dmp
        • memory/864-31-0x0000000000000000-mapping.dmp
        • memory/920-30-0x0000000000000000-mapping.dmp
        • memory/952-25-0x0000000000000000-mapping.dmp
        • memory/964-21-0x0000000000000000-mapping.dmp
        • memory/1020-20-0x0000000000000000-mapping.dmp
        • memory/1088-9-0x0000000000000000-mapping.dmp
        • memory/1088-7-0x00000000000A0000-0x00000000000A1000-memory.dmp
          Filesize

          4KB

        • memory/1172-23-0x0000000000000000-mapping.dmp
        • memory/1296-28-0x0000000000000000-mapping.dmp
        • memory/1520-2-0x000007FEF7120000-0x000007FEF739A000-memory.dmp
          Filesize

          2.5MB

        • memory/1608-18-0x0000000000000000-mapping.dmp
        • memory/1712-19-0x0000000000000000-mapping.dmp