Analysis

  • max time kernel
    135s
  • max time network
    165s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18/01/2024, 23:34

General

  • Target

    2024-01-18_f5be4fec7a91733f1ae62c36be21641b_cryptolocker.exe

  • Size

    56KB

  • MD5

    f5be4fec7a91733f1ae62c36be21641b

  • SHA1

    ba08d1cee40cc98f273f22277774b2416ab20a2c

  • SHA256

    7e1e06ccd0c57638c654b98000e295827b3ccecca14e7ec9c5efdc0a8db38759

  • SHA512

    dc81407737726d69c0dfc7ab8f54ec6904314062b31db7988a75f045cf5a0633a6e480975fd3a09f5ab91854ea86c081002e58e3fd8aa63555af719290c15901

  • SSDEEP

    768:xQz7yVEhs9+4uR1bytOOtEvwDpjWfbZgBh8i6g7Goi20HAp:xj+VGMOtEvwDpjubEgV20gp

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 5 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 7 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-01-18_f5be4fec7a91733f1ae62c36be21641b_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-18_f5be4fec7a91733f1ae62c36be21641b_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1804
    • 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:3820

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    56KB

    MD5

    063b2dfb304bcb45ca52f2967460a582

    SHA1

    f0d22a6673b5c0c35bb144f7cf977edff705ad7b

    SHA256

    326b2c935803189326691b0965f8c2c4b1d2311f76e306ef3e3cc79fa221d985

    SHA512

    edad880c54d32e03546ab270b9592fc54ed084726dc749bf5b8d3137ec6c7903e2dce7df2142738a5160d424c5fffcb73f1a4cbe936636cea8aa1c49f636798d

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1804-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/1804-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/1804-2-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/1804-3-0x00000000005E0000-0x00000000005E6000-memory.dmp

    Filesize

    24KB

  • memory/1804-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3820-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3820-22-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB

  • memory/3820-20-0x00000000006D0000-0x00000000006D6000-memory.dmp

    Filesize

    24KB

  • memory/3820-51-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB