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Analysis

  • max time kernel
    93s
  • max time network
    127s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    06/04/2024, 07:44

General

  • Target

    2024-04-06_f94741bf4c2112a3b30afa851a806b24_cryptolocker.exe

  • Size

    45KB

  • MD5

    f94741bf4c2112a3b30afa851a806b24

  • SHA1

    ddcb622b2397564cf8ed1c537bc1f7f4e00d02d9

  • SHA256

    c064b07a804620e19f0b2c48d5bef57ff2d25bff4f6efb0cce03b821d5b4304a

  • SHA512

    dceda32a880f2320813c09dcdbe050bd365b50f84e26c7d516507196100705a49d14ffebea0022744fa645c3387e139c318cc85f3cda1eb84f9ec7dcbfe1ccc7

  • SSDEEP

    768:UEEmoQDj/xnMp+yptndwe/PWQtOOtEvwDpjIm8z2iaSIO/WZrEu/d+qmsUHQ1wsU:ZzFbxmLPWQMOtEvwDpj386Sj/WprqQ1W

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies system certificate store 2 TTPs 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-04-06_f94741bf4c2112a3b30afa851a806b24_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-06_f94741bf4c2112a3b30afa851a806b24_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3104
    • C:\Users\Admin\AppData\Local\Temp\misid.exe
      "C:\Users\Admin\AppData\Local\Temp\misid.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Modifies system certificate store
      PID:4336

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    45KB

    MD5

    3aec8a89d22594f919c5a119a4c20fa6

    SHA1

    ea4ba9c42c59cff5e03c8deb8bbbaca16451fd08

    SHA256

    63666f7015311b3581e5b7bcce922a846249a12c93fa7bc51ed3fa503c4adde4

    SHA512

    b3fc6d5575c4126b8421af2b44bf046904b45f3c5bcc1e6b04476e6541f1e528fa453f096613480bddb050dcd15062f622c209784edbd5d49757904f67cdfba2

  • C:\Users\Admin\AppData\Local\Temp\misids.exe

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/3104-0-0x00000000004E0000-0x00000000004E3000-memory.dmp

    Filesize

    12KB

  • memory/3104-1-0x00000000005E0000-0x00000000005E6000-memory.dmp

    Filesize

    24KB

  • memory/3104-2-0x00000000005E0000-0x00000000005E6000-memory.dmp

    Filesize

    24KB

  • memory/3104-3-0x0000000000600000-0x0000000000606000-memory.dmp

    Filesize

    24KB

  • memory/3104-17-0x00000000004E0000-0x00000000004E3000-memory.dmp

    Filesize

    12KB

  • memory/4336-19-0x0000000001EE0000-0x0000000001F20000-memory.dmp

    Filesize

    256KB

  • memory/4336-20-0x0000000002070000-0x0000000002076000-memory.dmp

    Filesize

    24KB

  • memory/4336-22-0x0000000002050000-0x0000000002056000-memory.dmp

    Filesize

    24KB