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Analysis

  • max time kernel
    120s
  • max time network
    124s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    05/03/2024, 05:58

General

  • Target

    2024-03-05_a8f123fc397ab3f4ab084bda670feced_cryptolocker.exe

  • Size

    39KB

  • MD5

    a8f123fc397ab3f4ab084bda670feced

  • SHA1

    652d0a273a231125797afcfb8294bf22bbb6f47f

  • SHA256

    c3d87352f52de4a2b9fc5b4f2d61cf1e117dc076b2a72492966e36bdaacfbc8a

  • SHA512

    fc28cba405157458f7742f08af3506c0a7422abf88db930ab4819de9d83eb6d78000b603f4149548ca8a79aaedaeec1e18e95ab19345eb43ceae3b0413d20a10

  • SSDEEP

    768:TS5nQJ24LR7tOOtEvwDpjGqPhqlcnvgpnr:m5nkFNMOtEvwDpjG8hgpr

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 6 IoCs
  • Detection of Cryptolocker Samples 3 IoCs
  • Detects executables built or packed with MPress PE compressor 5 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\2024-03-05_a8f123fc397ab3f4ab084bda670feced_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-05_a8f123fc397ab3f4ab084bda670feced_cryptolocker.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:2232
    • 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:2192

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\Tar5374.tmp

    Filesize

    175KB

    MD5

    dd73cead4b93366cf3465c8cd32e2796

    SHA1

    74546226dfe9ceb8184651e920d1dbfb432b314e

    SHA256

    a6752b7851b591550e4625b832a393aabcc428de18d83e8593cd540f7d7cae22

    SHA512

    ce1bdd595065c94fa528badf4a6a8777893807d6789267612755df818ba6ffe55e4df429710aea29526ee4aa8ef20e25f2f05341da53992157d21ae032c0fb63

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

    Filesize

    39KB

    MD5

    b584dc58ad6aa022722f5336cdf33285

    SHA1

    920222fc620ded07c4525b912f8166c2d9595cbc

    SHA256

    1a0162d36835997b21163e6ac1661beaf5584b053f22d2e10da1af6ecbe24b08

    SHA512

    5cbb3d4d5be50a78c288a1bdedb4e065347182ad6da90f03a6c098d96acb9eef87a619cb35714f3163754e00d36108d1ec01dd98e338235afd88c8f7897d4c68

  • memory/2192-21-0x00000000001D0000-0x00000000001D6000-memory.dmp

    Filesize

    24KB

  • memory/2192-17-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/2192-19-0x0000000000280000-0x0000000000286000-memory.dmp

    Filesize

    24KB

  • memory/2192-96-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/2232-2-0x0000000000240000-0x0000000000246000-memory.dmp

    Filesize

    24KB

  • memory/2232-15-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/2232-14-0x0000000001F70000-0x0000000001F7E000-memory.dmp

    Filesize

    56KB

  • memory/2232-0-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/2232-3-0x0000000000270000-0x0000000000276000-memory.dmp

    Filesize

    24KB

  • memory/2232-1-0x0000000000240000-0x0000000000246000-memory.dmp

    Filesize

    24KB