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Analysis

  • max time kernel
    130s
  • max time network
    153s
  • 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, 23:02

General

  • Target

    2024-01-18_893fa598a5f490dc78a98d3a605c1a2d_cryptolocker.exe

  • Size

    59KB

  • MD5

    893fa598a5f490dc78a98d3a605c1a2d

  • SHA1

    28883b521b85a77623a2d3a25c62c1596f0e45f7

  • SHA256

    2efa9805e3d13ed2967bf0cba7a3072d0d7eb64b0e7c858b47140df5362dc959

  • SHA512

    fbc9dd825ae55098339f657099c7dd39247f10c32176bcf8157c942f19e64a3993c9094c6509261f7f1285aace5ebe58bf4fa11836e6f7b21775caa6ab9a0bdb

  • SSDEEP

    768:xQz7yVEhs9+4uR1bytOOtEvwDpjWfbZgBh8i6g7GoFwDJ:xj+VGMOtEvwDpjubEgywV

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 4 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-01-18_893fa598a5f490dc78a98d3a605c1a2d_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-18_893fa598a5f490dc78a98d3a605c1a2d_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4528
    • 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:2820

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    59KB

    MD5

    f12f2602f6cee9e3a9c086b5c155a175

    SHA1

    4d1bde74fcdc8b93170ea57dcd67a71c6baee1bc

    SHA256

    556bc944c976fffe8ff7b743ca28bc956d76dcfaa10efcb345cb846cddbfe45f

    SHA512

    4270e984f8dfe0dcfa0dfe7d74e48647670859766994dd9e2bf5ca4e644f2a1e5fb0f0886005969a4ae4b8b66567fc725c47f07b835066d033d8f37912d95c80

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2820-19-0x00000000005E0000-0x00000000005E6000-memory.dmp

    Filesize

    24KB

  • memory/2820-25-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2820-27-0x00000000005B0000-0x00000000005B6000-memory.dmp

    Filesize

    24KB

  • memory/4528-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4528-1-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4528-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/4528-3-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/4528-4-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/4528-26-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB