Analysis

  • max time kernel
    192s
  • max time network
    196s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29/11/2022, 16:05

General

  • Target

    db7bb6bfd6e8decc478d3c8473ddf276a5fa5090e6987e3c5d641a63337a2460.dll

  • Size

    380KB

  • MD5

    f7e390609bcab34a1cde45f4c8415fa8

  • SHA1

    59774582c775dd7fd2fd2b6c9b18e8432ce326d8

  • SHA256

    db7bb6bfd6e8decc478d3c8473ddf276a5fa5090e6987e3c5d641a63337a2460

  • SHA512

    504afada85f1d6a7cbb985467ad7b44345954322b50a79a488bdc53d97a1317b69a9477fa651c09263afbb990632bc7ed27a6df64209883ba255017b6ab2780a

  • SSDEEP

    6144:zKwFsGM5y+3kyzuJO1AmAGFxlNWCJBD4DsWR3Uqzujd3rm4eKsaJ:zlRB+3kyzuJO1AqWzujd3i4eKs6

Malware Config

Signatures

  • Ramnit

    Ramnit is a versatile family that holds viruses, worms, and Trojans.

  • Executes dropped EXE 2 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Installs/modifies Browser Helper Object 2 TTPs 1 IoCs

    BHOs are DLL modules which act as plugins for Internet Explorer.

  • Drops file in System32 directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Program crash 2 IoCs
  • Modifies Internet Explorer settings 1 TTPs 26 IoCs
  • Modifies registry class 51 IoCs
  • Suspicious behavior: LoadsDriver 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SetWindowsHookEx 10 IoCs
  • Suspicious use of WriteProcessMemory 37 IoCs

Processes

  • C:\Windows\system32\regsvr32.exe
    regsvr32 /s C:\Users\Admin\AppData\Local\Temp\db7bb6bfd6e8decc478d3c8473ddf276a5fa5090e6987e3c5d641a63337a2460.dll
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:540
    • C:\Windows\SysWOW64\regsvr32.exe
      /s C:\Users\Admin\AppData\Local\Temp\db7bb6bfd6e8decc478d3c8473ddf276a5fa5090e6987e3c5d641a63337a2460.dll
      2⤵
      • Installs/modifies Browser Helper Object
      • Drops file in System32 directory
      • Modifies Internet Explorer settings
      • Modifies registry class
      • Suspicious use of WriteProcessMemory
      PID:3112
      • C:\Windows\SysWOW64\regsvr32mgr.exe
        C:\Windows\SysWOW64\regsvr32mgr.exe
        3⤵
        • Executes dropped EXE
        • Checks computer location settings
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:5036
        • C:\Windows\SysWOW64\svchost.exe
          C:\Windows\system32\svchost.exe
          4⤵
            PID:3768
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -u -p 3768 -s 204
              5⤵
              • Program crash
              PID:3748
          • C:\Program Files\Internet Explorer\iexplore.exe
            "C:\Program Files\Internet Explorer\iexplore.exe"
            4⤵
            • Modifies Internet Explorer settings
            • Suspicious use of FindShellTrayWindow
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:1324
            • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
              "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1324 CREDAT:17410 /prefetch:2
              5⤵
              • Modifies Internet Explorer settings
              • Suspicious use of SetWindowsHookEx
              PID:5076
          • C:\Windows\SysWOW64\svchost.exe
            C:\Windows\system32\svchost.exe
            4⤵
              PID:4044
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 4044 -s 204
                5⤵
                • Program crash
                PID:1776
            • C:\Program Files\Internet Explorer\iexplore.exe
              "C:\Program Files\Internet Explorer\iexplore.exe"
              4⤵
              • Modifies Internet Explorer settings
              • Suspicious use of FindShellTrayWindow
              • Suspicious use of SetWindowsHookEx
              • Suspicious use of WriteProcessMemory
              PID:3456
              • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
                "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:3456 CREDAT:17410 /prefetch:2
                5⤵
                • Modifies Internet Explorer settings
                • Suspicious use of SetWindowsHookEx
                PID:4548
            • C:\Users\Admin\AppData\Local\Temp\cupcfbguiukilobo.exe
              "C:\Users\Admin\AppData\Local\Temp\cupcfbguiukilobo.exe"
              4⤵
              • Executes dropped EXE
              • Suspicious use of AdjustPrivilegeToken
              PID:1020
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 3768 -ip 3768
        1⤵
          PID:228
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 476 -p 4044 -ip 4044
          1⤵
            PID:3240

          Network

                MITRE ATT&CK Enterprise v6

                Replay Monitor

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                Downloads

                • C:\Users\Admin\AppData\Local\Microsoft\Internet Explorer\Recovery\High\Active\RecoveryStore.{5EB92546-711E-11ED-919F-7218A89707DE}.dat

                  Filesize

                  5KB

                  MD5

                  946ddb887de1253e351cbf80ff66e37c

                  SHA1

                  cd5196d036f1985c96f273c2684063738bc1f52a

                  SHA256

                  cdbb520206f852f40da90f0266bf9bc81e8d44e07193a3b17f0d7bf052b83146

                  SHA512

                  0fdc342768ca50f2e7874abe7742c69dbefc206a28208be2171581ea4c1ec1056d6bac86bac9d53b7c00e19585f3493a9656fadaf9bdfc1855c853452d92e262

                • C:\Users\Admin\AppData\Local\Microsoft\Internet Explorer\Recovery\High\Active\RecoveryStore.{5EB94C56-711E-11ED-919F-7218A89707DE}.dat

                  Filesize

                  5KB

                  MD5

                  747e9f1fcd28646930e38aa25239069f

                  SHA1

                  1b50cecd4733c772aabb44e8d93c56c744244383

                  SHA256

                  67128c9e628f789f2c30db3a4d29b9d85b111eeba0638a4a45b1ca2da05ac82e

                  SHA512

                  b9a80f32a948888f55ba993d28c23d5efee9622a6d9f60e9d7fc559b10b1d9d33ab4b43a8ffdd832a71e1b4f6ab0743a68fc6779e09f913de4936b59d51ae44c

                • C:\Users\Admin\AppData\Local\Temp\cupcfbguiukilobo.exe

                  Filesize

                  114KB

                  MD5

                  4c994b7218b80db2fe103d0f8fb92822

                  SHA1

                  587501280df187180825dd1c9b7dd93e235a84e4

                  SHA256

                  cd61bb2ee59221d4b96f4120c4eecbb280f0bc8417de703b04f30a16ddad1b7b

                  SHA512

                  e977013d3a03634bebadfa7cf9e15dc68bc9856484914aa334815e38d73a642e1ccc67c14bc79159b6b7e5dcebc2d2273a189e2168a7cc9cc4ccf9bfb5003495

                • C:\Users\Admin\AppData\Local\Temp\cupcfbguiukilobo.exe

                  Filesize

                  114KB

                  MD5

                  4c994b7218b80db2fe103d0f8fb92822

                  SHA1

                  587501280df187180825dd1c9b7dd93e235a84e4

                  SHA256

                  cd61bb2ee59221d4b96f4120c4eecbb280f0bc8417de703b04f30a16ddad1b7b

                  SHA512

                  e977013d3a03634bebadfa7cf9e15dc68bc9856484914aa334815e38d73a642e1ccc67c14bc79159b6b7e5dcebc2d2273a189e2168a7cc9cc4ccf9bfb5003495

                • C:\Windows\SysWOW64\regsvr32mgr.exe

                  Filesize

                  114KB

                  MD5

                  4c994b7218b80db2fe103d0f8fb92822

                  SHA1

                  587501280df187180825dd1c9b7dd93e235a84e4

                  SHA256

                  cd61bb2ee59221d4b96f4120c4eecbb280f0bc8417de703b04f30a16ddad1b7b

                  SHA512

                  e977013d3a03634bebadfa7cf9e15dc68bc9856484914aa334815e38d73a642e1ccc67c14bc79159b6b7e5dcebc2d2273a189e2168a7cc9cc4ccf9bfb5003495

                • C:\Windows\SysWOW64\regsvr32mgr.exe

                  Filesize

                  114KB

                  MD5

                  4c994b7218b80db2fe103d0f8fb92822

                  SHA1

                  587501280df187180825dd1c9b7dd93e235a84e4

                  SHA256

                  cd61bb2ee59221d4b96f4120c4eecbb280f0bc8417de703b04f30a16ddad1b7b

                  SHA512

                  e977013d3a03634bebadfa7cf9e15dc68bc9856484914aa334815e38d73a642e1ccc67c14bc79159b6b7e5dcebc2d2273a189e2168a7cc9cc4ccf9bfb5003495

                • memory/1020-146-0x0000000000400000-0x0000000000437E80-memory.dmp

                  Filesize

                  223KB

                • memory/1020-148-0x0000000000400000-0x0000000000437E80-memory.dmp

                  Filesize

                  223KB

                • memory/5036-138-0x0000000000400000-0x0000000000437E80-memory.dmp

                  Filesize

                  223KB

                • memory/5036-147-0x0000000000400000-0x0000000000437E80-memory.dmp

                  Filesize

                  223KB