Analysis

  • max time kernel
    139s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27-01-2024 10:30

General

  • Target

    2024-01-27_43ffa5280b9bf0b667dfa93dcb035474_cryptolocker.exe

  • Size

    61KB

  • MD5

    43ffa5280b9bf0b667dfa93dcb035474

  • SHA1

    efd008eb9d584d9542fb72a878c426d49b3815d8

  • SHA256

    3159ab54c120073d5a79fac1e073a3ed6a04198663908f30e2268d7c77999421

  • SHA512

    5f2fbfe5aba8a6687a2be4fbcbc37bf4e82d57e958d862fd5036c4b2b9e760d253863d8c2c4efae7bdaa994d54cebd1826da2eb48d1d8a161973f8df665e6c76

  • SSDEEP

    768:6Qz7yVEhs9+4OR7tOOtEvwDpjLHqPOYRmNxt5I52kGEiN/:6j+1NMOtEvwDpjr8ox8UDEiN

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\2024-01-27_43ffa5280b9bf0b667dfa93dcb035474_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-27_43ffa5280b9bf0b667dfa93dcb035474_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3156
    • 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:2212

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    61KB

    MD5

    126f6be1050b06b06c64ee9098c360f1

    SHA1

    0fab2d3b563bbcf8e83c39c56a93625abc203c27

    SHA256

    0740b433037ab363b567a9506130ff58d316599a6c3ede527cdd424b981a1559

    SHA512

    c8fdcc754f8c5ca77ed8eb95a3aa3756e08679d2344870518d7dd00640c4bec7749273b0135075892ea96a0aef474cdf4f2ff8ce7854853f98e005610bbd79b4

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2212-19-0x00000000006D0000-0x00000000006D6000-memory.dmp

    Filesize

    24KB

  • memory/2212-18-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/2212-48-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/3156-0-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/3156-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/3156-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/3156-3-0x0000000000850000-0x0000000000856000-memory.dmp

    Filesize

    24KB

  • memory/3156-25-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB