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Analysis

  • max time kernel
    138s
  • max time network
    124s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240419-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03/05/2024, 05:26

General

  • Target

    2024-05-03_0906d4840f4b6846ea5642815effc675_cryptolocker.exe

  • Size

    44KB

  • MD5

    0906d4840f4b6846ea5642815effc675

  • SHA1

    6ef08b67b449765930c9313a98211e0dd526700a

  • SHA256

    e5c3bfcb0cdbe64f06f2603c7e511c4cf36566769dbb25ead97f36a62bfe28a2

  • SHA512

    509389a2d2cfeda437858a7ca570fdc17066cd0cae0c540206a887b9f42b680bcd88562c03d7395ecb9a66d152ae490c4fd72179197aac154f16fd9493627c31

  • SSDEEP

    768:TS5nQJ24LR7tOOtEvwDpjGqPhqlcnvhx5/xFRp5jvbX:m5nkFNMOtEvwDpjG8hhXj53X

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 3 IoCs
  • Detects executables built or packed with MPress PE compressor 5 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\2024-05-03_0906d4840f4b6846ea5642815effc675_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-03_0906d4840f4b6846ea5642815effc675_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4520
    • 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:1636

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    44KB

    MD5

    dfc49e2b5af2a25bc79c1b91ea4fecce

    SHA1

    11dbbecd6ae2b9dcfe30b06dc7c410c731337f65

    SHA256

    25f9aeb80fb9bc4fd4d992777a008ccf193b9fc98e61718b041761c2d437cf0e

    SHA512

    00159f5a5d1caec774ba54417c1f18c95b204cab3bf0b9ffc835febec9246683c97208d563d23dfef6e7f21e6fb3b2888bbdffa1a1b4434e5d9c0121f72304ce

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1636-16-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/1636-20-0x0000000001FF0000-0x0000000001FF6000-memory.dmp

    Filesize

    24KB

  • memory/1636-26-0x0000000001FD0000-0x0000000001FD6000-memory.dmp

    Filesize

    24KB

  • memory/1636-50-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/4520-0-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/4520-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB

  • memory/4520-2-0x00000000006E0000-0x00000000006E6000-memory.dmp

    Filesize

    24KB

  • memory/4520-9-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB

  • memory/4520-18-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB