Analysis

  • max time kernel
    77s
  • max time network
    76s
  • platform
    windows7_x64
  • resource
    win7-20240705-en
  • resource tags

    arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
  • submitted
    04-08-2024 16:58

General

  • Target

    Key.exe

  • Size

    338KB

  • MD5

    04fb36199787f2e3e2135611a38321eb

  • SHA1

    65559245709fe98052eb284577f1fd61c01ad20d

  • SHA256

    d765e722e295969c0a5c2d90f549db8b89ab617900bf4698db41c7cdad993bb9

  • SHA512

    533d6603f6e2a77bd1b2c6591a135c4717753d53317c1be06e43774e896d9543bcd0ea6904a0688aa84b2d8424641d68994b1e7dc4aa46d66c36feecb6145444

  • SSDEEP

    6144:sWmw0EuCN0pLWgTO3x5N22vWvLRKKAX5l++SybIvC:sWkEuCaNT85I2vCMX5l+ZRv

Malware Config

Signatures

  • CryptoLocker

    Ransomware family with multiple variants.

  • Deletes itself 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Drops file in System32 directory 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Modifies data under HKEY_USERS 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 11 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Key.exe
    "C:\Users\Admin\AppData\Local\Temp\Key.exe"
    1⤵
    • Loads dropped DLL
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2400
    • C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe
      "C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe" "/rC:\Users\Admin\AppData\Local\Temp\Key.exe"
      2⤵
      • Deletes itself
      • Executes dropped EXE
      • Loads dropped DLL
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:1932
      • C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe
        "C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe" /w000000C8
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:316
  • C:\Windows\explorer.exe
    "C:\Windows\explorer.exe"
    1⤵
      PID:2892
    • C:\Windows\system32\SearchIndexer.exe
      C:\Windows\system32\SearchIndexer.exe /Embedding
      1⤵
      • Modifies data under HKEY_USERS
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:532
      • C:\Windows\system32\SearchProtocolHost.exe
        "C:\Windows\system32\SearchProtocolHost.exe" Global\UsGthrFltPipeMssGthrPipe1_ Global\UsGthrCtrlFltPipeMssGthrPipe1 1 -2147483646 "Software\Microsoft\Windows Search" "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT; MS Search 4.0 Robot)" "C:\ProgramData\Microsoft\Search\Data\Temp\usgthrsvc" "DownLevelDaemon"
        2⤵
        • Drops file in System32 directory
        • Modifies data under HKEY_USERS
        • Suspicious use of SetWindowsHookEx
        PID:1516
      • C:\Windows\system32\SearchFilterHost.exe
        "C:\Windows\system32\SearchFilterHost.exe" 0 516 520 528 65536 524
        2⤵
        • Modifies data under HKEY_USERS
        PID:1380

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\ProgramData\Microsoft\Search\Data\Applications\Windows\MSS.log

      Filesize

      1024KB

      MD5

      aba3f2084ca9ac13358b60882478cac4

      SHA1

      7f659eefd6d7db53ec9d34ee4124d6a0f8bd3322

      SHA256

      d8358a5f6e3e6eb00745997ae980417d89811d89287fd8e954871ec1f90b93bb

      SHA512

      9ce9a0ed730fe2bba12c9c83fb1c31e9094740c70fa8cdea1625bf5c92fb5893f766a9492e52a8a9220f2dac0a20bb4659789ac8471a2645f439bd5e67d0e3da

    • C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe

      Filesize

      338KB

      MD5

      04fb36199787f2e3e2135611a38321eb

      SHA1

      65559245709fe98052eb284577f1fd61c01ad20d

      SHA256

      d765e722e295969c0a5c2d90f549db8b89ab617900bf4698db41c7cdad993bb9

      SHA512

      533d6603f6e2a77bd1b2c6591a135c4717753d53317c1be06e43774e896d9543bcd0ea6904a0688aa84b2d8424641d68994b1e7dc4aa46d66c36feecb6145444

    • memory/532-58-0x0000000002EC0000-0x0000000002EC8000-memory.dmp

      Filesize

      32KB

    • memory/532-26-0x0000000001BC0000-0x0000000001BD0000-memory.dmp

      Filesize

      64KB

    • memory/532-52-0x0000000002EC0000-0x0000000002EC1000-memory.dmp

      Filesize

      4KB

    • memory/532-51-0x0000000002F00000-0x0000000002F08000-memory.dmp

      Filesize

      32KB

    • memory/532-9-0x0000000001AB0000-0x0000000001AC0000-memory.dmp

      Filesize

      64KB

    • memory/532-60-0x00000000013F0000-0x00000000013F1000-memory.dmp

      Filesize

      4KB

    • memory/532-69-0x0000000002F10000-0x0000000002F18000-memory.dmp

      Filesize

      32KB

    • memory/532-75-0x0000000003220000-0x0000000003228000-memory.dmp

      Filesize

      32KB

    • memory/532-78-0x0000000003850000-0x0000000003858000-memory.dmp

      Filesize

      32KB

    • memory/532-79-0x0000000003840000-0x0000000003841000-memory.dmp

      Filesize

      4KB

    • memory/532-86-0x0000000003860000-0x0000000003868000-memory.dmp

      Filesize

      32KB