Analysis

  • max time kernel
    134s
  • 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
    31-05-2024 09:26

General

  • Target

    2024-05-31_155002798c1caa274eaa31988a122c26_cryptolocker.exe

  • Size

    44KB

  • MD5

    155002798c1caa274eaa31988a122c26

  • SHA1

    b3a2182560d2fa4d6bac9a069340888e1ac8b576

  • SHA256

    2012e260e5bd2bdf1ec1482edf074255147c079a4ce9861d33be6d7d340b2b25

  • SHA512

    44517c8cd25f325973c79f045be00f4772dc388a532c9fbf2a7a68563c63d13776f16526cd7fafadbbb4725a9e5462e6eb203761dc14497199fe3c5059f9dba7

  • SSDEEP

    768:vQz7yVEhs9+js1SQtOOtEvwDpjz9+4REL+cc66TcY:vj+jsMQMOtEvwDpj5HW5scY

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Detection of Cryptolocker Samples 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\2024-05-31_155002798c1caa274eaa31988a122c26_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-31_155002798c1caa274eaa31988a122c26_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4876
    • 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:4100

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    44KB

    MD5

    bc1092dffc589599d3f5ab528f81fed4

    SHA1

    20986b51a9ca7ff773d7562afd8d09c67326d9c8

    SHA256

    de3546d17aa22a79094e0cc79c8996cdf121097e77b1295279c56e017bc9a3b9

    SHA512

    7e0d11d330fbccc8a78b1faff705e39bb339bc12b75f6764e066c3085b831ed2636d53a5654ae0d04c2c32aefe961146c479894129ddb777913915e0dbb07f20

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/4100-17-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/4100-18-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/4876-0-0x00000000005B0000-0x00000000005B6000-memory.dmp

    Filesize

    24KB

  • memory/4876-1-0x00000000005D0000-0x00000000005D6000-memory.dmp

    Filesize

    24KB

  • memory/4876-8-0x00000000005B0000-0x00000000005B6000-memory.dmp

    Filesize

    24KB