Resubmissions

09-03-2021 16:09

210309-7n13ybp6e6 10

13-07-2020 07:31

200713-tk9e1ynrne 10

Analysis

  • max time kernel
    150s
  • max time network
    156s
  • platform
    windows7_x64
  • resource
    win7
  • submitted
    13-07-2020 07:31

General

  • Target

    1844sase.exe

  • Size

    332KB

  • MD5

    51373389a8df39b4101b69346e3ba336

  • SHA1

    022acbdec0f0fa53874aa959dccebe107d6b871f

  • SHA256

    c7552fe5ed044011aa09aebd5769b2b9f3df0faa8adaab42ef3bfff35f5190aa

  • SHA512

    d09efb3f00adacd97a46d9bbcbb9b0c2b7a78db66ad57e9491f8ad73d1c5b242b5e4248d61254058123e0d795dd95a7560cbb73252872ff2ebd79ace58f843fc

Malware Config

Signatures

  • Modifies system certificate store 2 IoCs
  • Ursnif RM3

    A heavily modified version of Ursnif discovered in the wild.

  • Suspicious use of WriteProcessMemory 36 IoCs
  • Suspicious use of SetWindowsHookEx 32 IoCs
  • Suspicious use of FindShellTrayWindow 8 IoCs
  • Checks whether UAC is enabled 16 IoCs
  • Modifies Internet Explorer settings 1 TTPs 196 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1844sase.exe
    "C:\Users\Admin\AppData\Local\Temp\1844sase.exe"
    1⤵
      PID:1464
    • C:\Program Files\Internet Explorer\iexplore.exe
      "C:\Program Files\Internet Explorer\iexplore.exe" -Embedding
      1⤵
      • Suspicious use of WriteProcessMemory
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of FindShellTrayWindow
      • Checks whether UAC is enabled
      • Modifies Internet Explorer settings
      PID:1700
      • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
        "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1700 CREDAT:275457 /prefetch:2
        2⤵
        • Modifies system certificate store
        • Suspicious use of SetWindowsHookEx
        • Checks whether UAC is enabled
        • Modifies Internet Explorer settings
        PID:1900
      • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
        "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1700 CREDAT:209931 /prefetch:2
        2⤵
          PID:2020
      • C:\Program Files\Internet Explorer\iexplore.exe
        "C:\Program Files\Internet Explorer\iexplore.exe" -Embedding
        1⤵
        • Suspicious use of WriteProcessMemory
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of FindShellTrayWindow
        • Checks whether UAC is enabled
        • Modifies Internet Explorer settings
        PID:2024
        • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
          "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:2024 CREDAT:275457 /prefetch:2
          2⤵
          • Suspicious use of SetWindowsHookEx
          • Checks whether UAC is enabled
          PID:1332
      • C:\Program Files\Internet Explorer\iexplore.exe
        "C:\Program Files\Internet Explorer\iexplore.exe" -Embedding
        1⤵
        • Suspicious use of WriteProcessMemory
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of FindShellTrayWindow
        • Checks whether UAC is enabled
        • Modifies Internet Explorer settings
        PID:1792
        • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
          "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1792 CREDAT:275457 /prefetch:2
          2⤵
          • Suspicious use of SetWindowsHookEx
          • Checks whether UAC is enabled
          PID:1812
      • C:\Program Files\Internet Explorer\iexplore.exe
        "C:\Program Files\Internet Explorer\iexplore.exe" -Embedding
        1⤵
        • Suspicious use of WriteProcessMemory
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of FindShellTrayWindow
        • Checks whether UAC is enabled
        • Modifies Internet Explorer settings
        PID:1996
        • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
          "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1996 CREDAT:275457 /prefetch:2
          2⤵
          • Suspicious use of SetWindowsHookEx
          • Checks whether UAC is enabled
          PID:1556
      • C:\Program Files\Internet Explorer\iexplore.exe
        "C:\Program Files\Internet Explorer\iexplore.exe" -Embedding
        1⤵
        • Suspicious use of WriteProcessMemory
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of FindShellTrayWindow
        • Checks whether UAC is enabled
        • Modifies Internet Explorer settings
        PID:1540
        • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
          "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1540 CREDAT:275457 /prefetch:2
          2⤵
          • Suspicious use of SetWindowsHookEx
          • Checks whether UAC is enabled
          • Modifies Internet Explorer settings
          PID:2020
      • C:\Program Files\Internet Explorer\iexplore.exe
        "C:\Program Files\Internet Explorer\iexplore.exe" -Embedding
        1⤵
        • Suspicious use of WriteProcessMemory
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of FindShellTrayWindow
        • Checks whether UAC is enabled
        • Modifies Internet Explorer settings
        PID:908
        • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
          "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:908 CREDAT:275457 /prefetch:2
          2⤵
          • Suspicious use of SetWindowsHookEx
          • Checks whether UAC is enabled
          PID:580
      • C:\Program Files\Internet Explorer\iexplore.exe
        "C:\Program Files\Internet Explorer\iexplore.exe" -Embedding
        1⤵
        • Suspicious use of WriteProcessMemory
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of FindShellTrayWindow
        • Checks whether UAC is enabled
        • Modifies Internet Explorer settings
        PID:1860
        • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
          "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1860 CREDAT:275457 /prefetch:2
          2⤵
          • Suspicious use of SetWindowsHookEx
          • Checks whether UAC is enabled
          • Modifies Internet Explorer settings
          PID:1532
      • C:\Program Files\Internet Explorer\iexplore.exe
        "C:\Program Files\Internet Explorer\iexplore.exe" -Embedding
        1⤵
        • Suspicious use of WriteProcessMemory
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of FindShellTrayWindow
        • Checks whether UAC is enabled
        • Modifies Internet Explorer settings
        PID:1884
        • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
          "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1884 CREDAT:275457 /prefetch:2
          2⤵
          • Suspicious use of SetWindowsHookEx
          • Checks whether UAC is enabled
          • Modifies Internet Explorer settings
          PID:928

      Network

      MITRE ATT&CK Matrix ATT&CK v6

      Defense Evasion

      Modify Registry

      1
      T1112

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\E49827401028F7A0F97B5576C77A26CB_7CE95D8DCA26FE957E7BD7D76F353B08
      • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
      • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\E49827401028F7A0F97B5576C77A26CB_7CE95D8DCA26FE957E7BD7D76F353B08
      • memory/580-15-0x0000000000000000-mapping.dmp
      • memory/928-19-0x0000000000000000-mapping.dmp
      • memory/1332-4-0x0000000000000000-mapping.dmp
      • memory/1464-0-0x0000000000310000-0x0000000000327000-memory.dmp
        Filesize

        92KB

      • memory/1532-17-0x0000000000000000-mapping.dmp
      • memory/1556-11-0x0000000000000000-mapping.dmp
      • memory/1812-9-0x0000000000000000-mapping.dmp
      • memory/1900-3-0x00000000051E0000-0x00000000051E3000-memory.dmp
        Filesize

        12KB

      • memory/1900-2-0x0000000006E30000-0x0000000006E53000-memory.dmp
        Filesize

        140KB

      • memory/1900-1-0x0000000000000000-mapping.dmp
      • memory/2020-13-0x0000000000000000-mapping.dmp