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Analysis

  • max time kernel
    93s
  • max time network
    126s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05/04/2024, 11:45

General

  • Target

    2024-04-05_4673e2e17f61aca171b381467f34830a_cryptolocker.exe

  • Size

    42KB

  • MD5

    4673e2e17f61aca171b381467f34830a

  • SHA1

    1980e57bbefdd9776d15d36ad35068db75aa7f63

  • SHA256

    d0fd9d8d57cc3c779a74576bbad0eb74a04a4c6c6c783536bad7105071ad9ca8

  • SHA512

    783e94564c426a41308f420b580e8efe1e4cca9f88216a20417feb441e39a71ea58e569f5c38aa869a6f1c0c64f539c91694ab513f4d3c7308674ad982d262d6

  • SSDEEP

    768:6Qz7yVEhs9+4OR7tOOtEvwDpjLHqhMWKajnuJ:6j+1NMOtEvwDpjrobW

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 IoCs
  • Detects executables built or packed with MPress PE compressor 4 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\2024-04-05_4673e2e17f61aca171b381467f34830a_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-05_4673e2e17f61aca171b381467f34830a_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2400
    • 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:572

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    43KB

    MD5

    c2947d8ad9745a57f9879b73cd620212

    SHA1

    35b64b2d0ceccc8914bd7a71431705f71b421186

    SHA256

    bcc3d9179c4c36c756eb79186ac3bd66c0c3fed30c77e48ac0c79f81f0ecfbc0

    SHA512

    3154674f30314f9bf83788278c69d32d16deeea62487950471e5bb3b76849d5847647e218ecd14389c0ff6d9aaa048efd7c0c39daec6e1e2812d435171257ac1

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/572-19-0x00000000005E0000-0x00000000005E6000-memory.dmp

    Filesize

    24KB

  • memory/572-47-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/2400-0-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/2400-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/2400-3-0x0000000002080000-0x0000000002086000-memory.dmp

    Filesize

    24KB

  • memory/2400-2-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/2400-17-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB