Analysis

  • max time kernel
    88s
  • max time network
    124s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03/02/2024, 03:31

General

  • Target

    2024-02-03_4216b81713711e9d5cf9f1d0446e4054_cryptolocker.exe

  • Size

    79KB

  • MD5

    4216b81713711e9d5cf9f1d0446e4054

  • SHA1

    3ad3a2040bad4f2b89ba85b78353c97d4a6fd4a3

  • SHA256

    648aec592d1e26ca344ea1f2ea2f7f97f9a2e820d7040124580b2ff78c2b14f8

  • SHA512

    3939bb2b04749407cbff9cfa82b7ffc57e84bfc9cf34deb0b5e79478b51b0aec0fd7ee37e01a35557bdbc3f9830b1d3cf4045a6df45db66960be7952ea52d829

  • SSDEEP

    1536:Tj+jsMQMOtEvwDpj5HmpJpOUHECgNMo0vp2EMMe:TCjsIOtEvwDpj5HE/OUHnSMs

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 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\2024-02-03_4216b81713711e9d5cf9f1d0446e4054_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-03_4216b81713711e9d5cf9f1d0446e4054_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4236
    • 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:4844

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          79KB

          MD5

          d8bd3a05ed8c73b7e61fe5ceeead4d62

          SHA1

          32ff866d37453ea8c67ed396e4dbf4617ad26a2a

          SHA256

          4e10e96a9db0d4f9a488056b6570fc308667b35eaa6953d1c96bf9a452e5793d

          SHA512

          acd37f7e78a64c0cac30dd0418d16469ee89fba78750815c6d81907cfe96cb661af6c559bb05b71cc424bb137c24613df2438e438b4d73d2a60bc159eeb5298d

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

          Filesize

          315B

          MD5

          a34ac19f4afae63adc5d2f7bc970c07f

          SHA1

          a82190fc530c265aa40a045c21770d967f4767b8

          SHA256

          d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

          SHA512

          42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

        • memory/4236-0-0x0000000000500000-0x000000000050E000-memory.dmp

          Filesize

          56KB

        • memory/4236-1-0x0000000000520000-0x0000000000526000-memory.dmp

          Filesize

          24KB

        • memory/4236-2-0x0000000000520000-0x0000000000526000-memory.dmp

          Filesize

          24KB

        • memory/4236-3-0x0000000000540000-0x0000000000546000-memory.dmp

          Filesize

          24KB

        • memory/4236-17-0x0000000000500000-0x000000000050E000-memory.dmp

          Filesize

          56KB

        • memory/4844-18-0x0000000000500000-0x000000000050E000-memory.dmp

          Filesize

          56KB

        • memory/4844-20-0x00000000004C0000-0x00000000004C6000-memory.dmp

          Filesize

          24KB

        • memory/4844-26-0x00000000004A0000-0x00000000004A6000-memory.dmp

          Filesize

          24KB

        • memory/4844-49-0x0000000000500000-0x000000000050E000-memory.dmp

          Filesize

          56KB