Analysis

  • max time kernel
    136s
  • max time network
    123s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240419-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05-05-2024 07:37

General

  • Target

    2024-05-05_9f6a720249df4cbaf77ca45135c313c9_cryptolocker.exe

  • Size

    62KB

  • MD5

    9f6a720249df4cbaf77ca45135c313c9

  • SHA1

    7f340ae8c2275e668ad03dd365d15ddd239f5e81

  • SHA256

    0f4bae2c29626349ea2fafef105c7ddf0b66ace0782213783b2290eb12b67578

  • SHA512

    8deb971dc27593de2d7518bfa35930435bd5098d56dc7f971fb24f4c81eb18e5165b8e9929087da9673b3de06b587977b6f9d1ff003e6c247a374c8162b78f2f

  • SSDEEP

    768:3Uz7yVEhs9+Hs1SQtOOtEvwDpjO9+4hdCY8EQMjpi/Wpi3B3URiLqCyLuAx8XG9F:3P+HsMQMOtEvwDpjoHy7B3g9CWuAxW0

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 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\2024-05-05_9f6a720249df4cbaf77ca45135c313c9_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-05_9f6a720249df4cbaf77ca45135c313c9_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4460
    • 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:536

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    62KB

    MD5

    4e050d57998e1e25b0fc24d880627135

    SHA1

    028b490d2d734c8523b2e9560500457459d8452d

    SHA256

    c5e8b7698dc4bd025684c3e7320e3b9f867c05aed3519e0ee0ef46a5fb1862a7

    SHA512

    d15244cade0b725e6170909f0975d741c272320fa9a8280dc49ab42c374da64b6307b630b1dc75548470547790d81292bce9f7b8c5ee856696a9418db6885e94

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/536-19-0x0000000002060000-0x0000000002066000-memory.dmp

    Filesize

    24KB

  • memory/536-25-0x0000000002150000-0x0000000002156000-memory.dmp

    Filesize

    24KB

  • memory/536-48-0x0000000000500000-0x000000000050B000-memory.dmp

    Filesize

    44KB

  • memory/4460-0-0x0000000000500000-0x000000000050B000-memory.dmp

    Filesize

    44KB

  • memory/4460-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/4460-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/4460-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/4460-17-0x0000000000500000-0x000000000050B000-memory.dmp

    Filesize

    44KB