Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    12/06/2024, 18:49

General

  • Target

    2024-06-12_ef1b6f05471066e3ef54f455a29d79a1_cryptolocker.exe

  • Size

    40KB

  • MD5

    ef1b6f05471066e3ef54f455a29d79a1

  • SHA1

    6c9f4edb3675eac79587918e360162e01af22e28

  • SHA256

    109c476e7029a7f6f3423c5ed4af67b8992ad73a4f92ebc38451b5e8b0341437

  • SHA512

    eb7ad306a1699eef39e6ddc6868493ce3bdb8ed21c087a7f9d71c6eb6f48491ddd022bf498e527d98fd17f1a800377d02b105b78526efb2eddca462f1b19340b

  • SSDEEP

    768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYabDb2:qDdFJy3QMOtEvwDpjjWMl7TdC

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 5 IoCs
  • UPX dump on OEP (original entry point) 5 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 IoCs
  • UPX packed file 5 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-06-12_ef1b6f05471066e3ef54f455a29d79a1_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-12_ef1b6f05471066e3ef54f455a29d79a1_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4476
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:4372

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    40KB

    MD5

    83a13a523f26e7315536e08edd61f11a

    SHA1

    a115c13075fb0f9b2b542b2f5d86520ec6d82cd7

    SHA256

    b4cb1228fad5380f97c8e144e34e52f6be52f795ef63854f618076c82d7df09d

    SHA512

    a3b5810a9ca0e71305a10180011cc72ffdae73b49b62d5a7316ad9c7db9f131fc769f7c12fd7f06f982f8b80d906f4c03f1a0610f6355d51a36d458b61bad71d

  • memory/4372-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4372-20-0x0000000002090000-0x0000000002096000-memory.dmp

    Filesize

    24KB

  • memory/4372-26-0x0000000000680000-0x0000000000686000-memory.dmp

    Filesize

    24KB

  • memory/4372-27-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4476-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4476-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/4476-2-0x00000000007D0000-0x00000000007D6000-memory.dmp

    Filesize

    24KB

  • memory/4476-9-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/4476-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB