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Analysis

  • max time kernel
    149s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28/03/2024, 06:32

General

  • Target

    2024-03-28_23bfd1cf518cbb937de8f6fd3521a66a_cryptolocker.exe

  • Size

    32KB

  • MD5

    23bfd1cf518cbb937de8f6fd3521a66a

  • SHA1

    f969f6aae4fb7bbf44961976aa675ec704e99331

  • SHA256

    50e15c31a69415d3723c60780e20608c4093a28bcb03e3f83649d7ea0e3b954c

  • SHA512

    0fa4b77df2189710260c02efff58dcaae3893e4df1d04f2cbd43f60dcdc6d9527098b2adbacac42f857e392b671d0d38dad57484d4fdd75a83207f5926c3ee44

  • SSDEEP

    768:q0ZziOWwULueOSdE8tOOtEvwDpjeWaJIOc+4tHbjyz:q0zizzOSxMOtEvwDpj/arqc

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 2 IoCs
  • UPX dump on OEP (original entry point) 4 IoCs
  • Checks computer location settings 2 TTPs 1 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).

  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-03-28_23bfd1cf518cbb937de8f6fd3521a66a_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-28_23bfd1cf518cbb937de8f6fd3521a66a_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4840
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:4608

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    33KB

    MD5

    59bb36e46e9bf0f78c88a9c1e75508d2

    SHA1

    a70ee3a57ce4dfb8abc82f28f58b95df4a17d8bd

    SHA256

    c32ef29bf45ebd8b14aac0b1ca3f2289696abcea7d5df305a60e444124b97b1b

    SHA512

    b7f5b81416e900587cf51389ba3290ffc578d972a324dea3beecf7cc13f9e7e8f9c200a9e388440dd513afa462217f27328cd2171d4678efce7840f6f69ef764

  • memory/4608-20-0x0000000000760000-0x0000000000766000-memory.dmp

    Filesize

    24KB

  • memory/4608-19-0x0000000000730000-0x0000000000736000-memory.dmp

    Filesize

    24KB

  • memory/4608-26-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4840-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4840-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

    Filesize

    24KB

  • memory/4840-2-0x00000000005B0000-0x00000000005B6000-memory.dmp

    Filesize

    24KB

  • memory/4840-3-0x00000000005D0000-0x00000000005D6000-memory.dmp

    Filesize

    24KB

  • memory/4840-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB