Analysis

  • max time kernel
    93s
  • max time network
    124s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-05-2024 19:47

General

  • Target

    2024-05-21_fce3f4ffbdb7bf126a43adaa07b51073_cryptolocker.exe

  • Size

    48KB

  • MD5

    fce3f4ffbdb7bf126a43adaa07b51073

  • SHA1

    77f80819692755cccb144e0234afeedaa9e9718b

  • SHA256

    996640bdc2e1387cb545be3db20ca8e4ff5085544586fe5e52710f4cb5d0ec8e

  • SHA512

    042c13f63e5bfe498086accf2db1ef79c3ec5ed937c0342947a8df01937309b78b17b41e9a9842f873d47c11db7be0d0a28fc3038aa693719bbbff10149619bd

  • SSDEEP

    768:xQz7yVEhs9+4uR1bytOOtEvwDpjWE6BLbjG9RzhwaRh+Epc:xj+VGMOtEvwDpjy+TRh+Eu

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 10 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-21_fce3f4ffbdb7bf126a43adaa07b51073_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-21_fce3f4ffbdb7bf126a43adaa07b51073_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3080
    • 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:1036

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    48KB

    MD5

    efaf005b9f7c0fc010dc251d73706e9e

    SHA1

    83183add4014182369ab88436c17f8abe993f2d5

    SHA256

    20ad7c207f5bf51bee74260c470b78add55db1a2cd2f1c2e9e2287a15ea57145

    SHA512

    0f917d5bf46e0e9bc370a8988a2d1a62b63f1f39b358c452674255dbf5fcde39406e798fe38609510fbcccb026d3c658391795926e80fb1ad5ebccc2087cb31d

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1036-47-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3080-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3080-1-0x0000000000520000-0x0000000000526000-memory.dmp

    Filesize

    24KB

  • memory/3080-2-0x0000000002070000-0x0000000002076000-memory.dmp

    Filesize

    24KB

  • memory/3080-9-0x0000000000520000-0x0000000000526000-memory.dmp

    Filesize

    24KB

  • memory/3080-16-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB