Analysis

  • max time kernel
    152s
  • max time network
    156s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-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

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Ramnit

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

  • UAC bypass 3 TTPs 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Checks BIOS information in registry 2 TTPs 1 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • Drops startup file 2 IoCs
  • Loads dropped DLL 6 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • 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.

  • Modifies Internet Explorer settings 1 TTPs 2 IoCs
  • Modifies registry class 51 IoCs
  • Suspicious behavior: EnumeratesProcesses 43 IoCs
  • Suspicious behavior: LoadsDriver 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 35 IoCs

Processes

  • C:\Windows\system32\regsvr32.exe
    regsvr32 /s C:\Users\Admin\AppData\Local\Temp\db7bb6bfd6e8decc478d3c8473ddf276a5fa5090e6987e3c5d641a63337a2460.dll
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1960
    • C:\Windows\SysWOW64\regsvr32.exe
      /s C:\Users\Admin\AppData\Local\Temp\db7bb6bfd6e8decc478d3c8473ddf276a5fa5090e6987e3c5d641a63337a2460.dll
      2⤵
      • Loads dropped DLL
      • Installs/modifies Browser Helper Object
      • Drops file in System32 directory
      • Modifies Internet Explorer settings
      • Modifies registry class
      • Suspicious use of WriteProcessMemory
      PID:1968
      • C:\Windows\SysWOW64\regsvr32mgr.exe
        C:\Windows\SysWOW64\regsvr32mgr.exe
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:944
        • C:\Windows\SysWOW64\svchost.exe
          C:\Windows\system32\svchost.exe
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1988
        • C:\Windows\SysWOW64\svchost.exe
          C:\Windows\system32\svchost.exe
          4⤵
          • Modifies WinLogon for persistence
          • UAC bypass
          • Checks BIOS information in registry
          • Drops startup file
          • Adds Run key to start application
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1344
        • C:\Users\Admin\AppData\Local\Temp\yiyfkcdmslvbtfle.exe
          "C:\Users\Admin\AppData\Local\Temp\yiyfkcdmslvbtfle.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious use of AdjustPrivilegeToken
          PID:1780

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

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

          Filesize

          114KB

          MD5

          4c994b7218b80db2fe103d0f8fb92822

          SHA1

          587501280df187180825dd1c9b7dd93e235a84e4

          SHA256

          cd61bb2ee59221d4b96f4120c4eecbb280f0bc8417de703b04f30a16ddad1b7b

          SHA512

          e977013d3a03634bebadfa7cf9e15dc68bc9856484914aa334815e38d73a642e1ccc67c14bc79159b6b7e5dcebc2d2273a189e2168a7cc9cc4ccf9bfb5003495

        • C:\Users\Admin\AppData\Local\Temp\yiyfkcdmslvbtfle.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

        • \Users\Admin\AppData\Local\Temp\yiyfkcdmslvbtfle.exe

          Filesize

          114KB

          MD5

          4c994b7218b80db2fe103d0f8fb92822

          SHA1

          587501280df187180825dd1c9b7dd93e235a84e4

          SHA256

          cd61bb2ee59221d4b96f4120c4eecbb280f0bc8417de703b04f30a16ddad1b7b

          SHA512

          e977013d3a03634bebadfa7cf9e15dc68bc9856484914aa334815e38d73a642e1ccc67c14bc79159b6b7e5dcebc2d2273a189e2168a7cc9cc4ccf9bfb5003495

        • \Users\Admin\AppData\Local\Temp\yiyfkcdmslvbtfle.exe

          Filesize

          114KB

          MD5

          4c994b7218b80db2fe103d0f8fb92822

          SHA1

          587501280df187180825dd1c9b7dd93e235a84e4

          SHA256

          cd61bb2ee59221d4b96f4120c4eecbb280f0bc8417de703b04f30a16ddad1b7b

          SHA512

          e977013d3a03634bebadfa7cf9e15dc68bc9856484914aa334815e38d73a642e1ccc67c14bc79159b6b7e5dcebc2d2273a189e2168a7cc9cc4ccf9bfb5003495

        • \Users\Admin\AppData\Local\Temp\yiyfkcdmslvbtfle.exe

          Filesize

          114KB

          MD5

          4c994b7218b80db2fe103d0f8fb92822

          SHA1

          587501280df187180825dd1c9b7dd93e235a84e4

          SHA256

          cd61bb2ee59221d4b96f4120c4eecbb280f0bc8417de703b04f30a16ddad1b7b

          SHA512

          e977013d3a03634bebadfa7cf9e15dc68bc9856484914aa334815e38d73a642e1ccc67c14bc79159b6b7e5dcebc2d2273a189e2168a7cc9cc4ccf9bfb5003495

        • \Users\Admin\AppData\Local\Temp\yiyfkcdmslvbtfle.exe

          Filesize

          114KB

          MD5

          4c994b7218b80db2fe103d0f8fb92822

          SHA1

          587501280df187180825dd1c9b7dd93e235a84e4

          SHA256

          cd61bb2ee59221d4b96f4120c4eecbb280f0bc8417de703b04f30a16ddad1b7b

          SHA512

          e977013d3a03634bebadfa7cf9e15dc68bc9856484914aa334815e38d73a642e1ccc67c14bc79159b6b7e5dcebc2d2273a189e2168a7cc9cc4ccf9bfb5003495

        • \Windows\SysWOW64\regsvr32mgr.exe

          Filesize

          114KB

          MD5

          4c994b7218b80db2fe103d0f8fb92822

          SHA1

          587501280df187180825dd1c9b7dd93e235a84e4

          SHA256

          cd61bb2ee59221d4b96f4120c4eecbb280f0bc8417de703b04f30a16ddad1b7b

          SHA512

          e977013d3a03634bebadfa7cf9e15dc68bc9856484914aa334815e38d73a642e1ccc67c14bc79159b6b7e5dcebc2d2273a189e2168a7cc9cc4ccf9bfb5003495

        • \Windows\SysWOW64\regsvr32mgr.exe

          Filesize

          114KB

          MD5

          4c994b7218b80db2fe103d0f8fb92822

          SHA1

          587501280df187180825dd1c9b7dd93e235a84e4

          SHA256

          cd61bb2ee59221d4b96f4120c4eecbb280f0bc8417de703b04f30a16ddad1b7b

          SHA512

          e977013d3a03634bebadfa7cf9e15dc68bc9856484914aa334815e38d73a642e1ccc67c14bc79159b6b7e5dcebc2d2273a189e2168a7cc9cc4ccf9bfb5003495

        • memory/944-81-0x0000000000400000-0x0000000000437E80-memory.dmp

          Filesize

          223KB

        • memory/1344-77-0x0000000020010000-0x0000000020023000-memory.dmp

          Filesize

          76KB

        • memory/1344-73-0x0000000020010000-0x0000000020023000-memory.dmp

          Filesize

          76KB

        • memory/1780-90-0x0000000000400000-0x0000000000437E80-memory.dmp

          Filesize

          223KB

        • memory/1780-91-0x0000000000400000-0x0000000000437E80-memory.dmp

          Filesize

          223KB

        • memory/1960-54-0x000007FEFB6D1000-0x000007FEFB6D3000-memory.dmp

          Filesize

          8KB

        • memory/1968-56-0x0000000074AB1000-0x0000000074AB3000-memory.dmp

          Filesize

          8KB

        • memory/1988-64-0x0000000020010000-0x000000002001C000-memory.dmp

          Filesize

          48KB

        • memory/1988-67-0x0000000020010000-0x000000002001C000-memory.dmp

          Filesize

          48KB