Analysis

  • max time kernel
    146s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7v200430
  • submitted
    21-05-2020 11:58

General

  • Target

    B7Ai1.exe

  • Size

    326KB

  • MD5

    bf793bccc14cb7fc28c567eff08f7ea3

  • SHA1

    2d1d514e181ef557bd71f7986f401f7a52d567f8

  • SHA256

    c03f0ab451000aa4799772f609653d690d60ca68adbcb9b3c1f3eed26d075ff4

  • SHA512

    06aa9f46b152e8d00c39dcdb65b4661b9f705f5f1b39c3abfb432dde8ab2d253c306d3cac5fe5ecbae6a6ec73e2a4930a7ca16848447f5e1bc8b1a551fe801cc

Malware Config

Signatures

  • Suspicious use of SetWindowsHookEx 28 IoCs
  • Suspicious use of FindShellTrayWindow 7 IoCs
  • Modifies Internet Explorer settings 1 TTPs 37 IoCs
  • Modifies system certificate store 5 IoCs
  • Ursnif RM3

    A heavily modified version of Ursnif discovered in the wild.

  • Checks whether UAC is enabled 3 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\B7Ai1.exe
    "C:\Users\Admin\AppData\Local\Temp\B7Ai1.exe"
    1⤵
      PID:1312
    • C:\Program Files\Internet Explorer\iexplore.exe
      "C:\Program Files\Internet Explorer\iexplore.exe" -Embedding
      1⤵
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of FindShellTrayWindow
      • Modifies Internet Explorer settings
      • Checks whether UAC is enabled
      • Suspicious use of WriteProcessMemory
      PID:1496
      • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
        "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1496 CREDAT:275457 /prefetch:2
        2⤵
        • Suspicious use of SetWindowsHookEx
        • Modifies Internet Explorer settings
        • Modifies system certificate store
        • Checks whether UAC is enabled
        PID:1852
      • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
        "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1496 CREDAT:275471 /prefetch:2
        2⤵
        • Suspicious use of SetWindowsHookEx
        • Modifies Internet Explorer settings
        • Modifies system certificate store
        • Checks whether UAC is enabled
        PID:1976

    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
    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Cookies\DSH53UQB.txt
    • memory/1312-0-0x0000000000460000-0x0000000000470000-memory.dmp
      Filesize

      64KB

    • memory/1852-5-0x0000000002680000-0x0000000002681000-memory.dmp
      Filesize

      4KB

    • memory/1852-6-0x0000000002680000-0x0000000002681000-memory.dmp
      Filesize

      4KB

    • memory/1852-8-0x0000000002680000-0x0000000002681000-memory.dmp
      Filesize

      4KB

    • memory/1852-10-0x0000000002680000-0x0000000002681000-memory.dmp
      Filesize

      4KB

    • memory/1852-17-0x0000000002680000-0x0000000002682000-memory.dmp
      Filesize

      8KB

    • memory/1976-4-0x00000000044D0000-0x00000000044D3000-memory.dmp
      Filesize

      12KB