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Analysis

  • max time kernel
    121s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-20240215-en
  • resource tags

    arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
  • submitted
    28/02/2024, 02:28

General

  • Target

    2024-02-28_1cd0dcf7d99c82d32045f2edc50aaf8c_cryptolocker.exe

  • Size

    60KB

  • MD5

    1cd0dcf7d99c82d32045f2edc50aaf8c

  • SHA1

    fb548223812be3f70720fe7c8d1f04de0f73b6b4

  • SHA256

    2377e817e48e6afb4f598aaf9bb28010b400f913b50ba903eb1eef65d325520f

  • SHA512

    be9ee04af31f77a16aa2fdc51aeeb7c8d7e5d11137935c6d9966dc98179176aac9348623e47c72dd5491b0e54418cd89eb91661fef51ef87f5a7346a9998f9c3

  • SSDEEP

    768:UEEmoQDj/xnMp+yptndwe/PWQtOOtEvwDpjIm8lB4dCOBy/cMFqeoYPO+lxUU5:ZzFbxmLPWQMOtEvwDpj38lD/cMAT+lf

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies system certificate store 2 TTPs 3 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-02-28_1cd0dcf7d99c82d32045f2edc50aaf8c_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-28_1cd0dcf7d99c82d32045f2edc50aaf8c_cryptolocker.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:2240
    • C:\Users\Admin\AppData\Local\Temp\misid.exe
      "C:\Users\Admin\AppData\Local\Temp\misid.exe"
      2⤵
      • Executes dropped EXE
      • Modifies system certificate store
      PID:2940

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

    Filesize

    67KB

    MD5

    753df6889fd7410a2e9fe333da83a429

    SHA1

    3c425f16e8267186061dd48ac1c77c122962456e

    SHA256

    b42dc237e44cbc9a43400e7d3f9cbd406dbdefd62bfe87328f8663897d69df78

    SHA512

    9d56f79410ad0cf852c74c3ef9454e7ae86e80bdd6ff67773994b48ccac71142bcf5c90635da6a056e1406e81e64674db9584928e867c55b77b59e2851cf6444

  • C:\Users\Admin\AppData\Local\Temp\Tar156B.tmp

    Filesize

    175KB

    MD5

    dd73cead4b93366cf3465c8cd32e2796

    SHA1

    74546226dfe9ceb8184651e920d1dbfb432b314e

    SHA256

    a6752b7851b591550e4625b832a393aabcc428de18d83e8593cd540f7d7cae22

    SHA512

    ce1bdd595065c94fa528badf4a6a8777893807d6789267612755df818ba6ffe55e4df429710aea29526ee4aa8ef20e25f2f05341da53992157d21ae032c0fb63

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

    Filesize

    60KB

    MD5

    140643e3e3f7c224f541be829de06f1f

    SHA1

    dcfbe4d16219f388ef0300430a10d2753918325d

    SHA256

    cf0e64a7d96c96aa0e58edf65792e23ba2b17627eb6c017656da956c42bf19bf

    SHA512

    cfe8346e9f219f6f7a43716be45847fd4e81d4e7bdff812a6a22a88faa404fceead00377c61128d2dd858bb18df12d47deb7327e4dc3aa7d7f994ef7bb04c5fa

  • memory/2240-1-0x0000000000230000-0x00000000002B0000-memory.dmp

    Filesize

    512KB

  • memory/2240-0-0x00000000002C0000-0x00000000002C6000-memory.dmp

    Filesize

    24KB

  • memory/2240-2-0x0000000000310000-0x0000000000316000-memory.dmp

    Filesize

    24KB

  • memory/2240-9-0x00000000002C0000-0x00000000002C6000-memory.dmp

    Filesize

    24KB

  • memory/2940-16-0x00000000004B0000-0x00000000004B6000-memory.dmp

    Filesize

    24KB

  • memory/2940-23-0x0000000000240000-0x0000000000243000-memory.dmp

    Filesize

    12KB

  • memory/2940-24-0x0000000000430000-0x0000000000436000-memory.dmp

    Filesize

    24KB