Analysis

  • max time kernel
    143s
  • max time network
    144s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01-06-2024 19:33

General

  • Target

    2024-06-01_51129805c6321e8d79a8d9f4da4d8fc0_cryptolocker.exe

  • Size

    62KB

  • MD5

    51129805c6321e8d79a8d9f4da4d8fc0

  • SHA1

    299910b40776c117546ac72917041d2ca2ce0fe3

  • SHA256

    6521dcf62c805f525e8aa0975656f1089b60ac9d65db1f0082c8595fd179b4cb

  • SHA512

    abd4a0f79aeb266067465fdaf43dc83456675b8f4de04d18814264e2c47be7fe79804498f197d6447a0edac7314850e3d8f3d030c3f52d849553f2d154feafb3

  • SSDEEP

    768:3Uz7yVEhs9+Hs1SQtOOtEvwDpjO9+4hdCY8EQMjpi/Wpi3B3URiLqCyLuAx8XG9u:3P+HsMQMOtEvwDpjoHy7B3g9CWuAxWRl

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\2024-06-01_51129805c6321e8d79a8d9f4da4d8fc0_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-01_51129805c6321e8d79a8d9f4da4d8fc0_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4336
    • 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:4364

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    62KB

    MD5

    1a2a64d8ab0a6ee29e81502b2c7ed2e1

    SHA1

    4ffbb782e16fa78d545e50b56c7c2d35ca299ee9

    SHA256

    ee4c9722d02202a8c378c5d859ea18f014650110d8bf0ce49c0060fc7846b9c8

    SHA512

    5ee8cb9ab88c8abf5b9d0fe8fd0416cf1e1367715981393dfb07206900467603868605f0b6041cc05a8771630e93d7a05b045aa12daff291d7ffd959d9f89ca2

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/4336-0-0x0000000000500000-0x000000000050B000-memory.dmp

    Filesize

    44KB

  • memory/4336-1-0x00000000021D0000-0x00000000021D6000-memory.dmp

    Filesize

    24KB

  • memory/4336-2-0x00000000020E0000-0x00000000020E6000-memory.dmp

    Filesize

    24KB

  • memory/4336-9-0x00000000021D0000-0x00000000021D6000-memory.dmp

    Filesize

    24KB

  • memory/4336-17-0x0000000000500000-0x000000000050B000-memory.dmp

    Filesize

    44KB

  • memory/4364-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/4364-25-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/4364-48-0x0000000000500000-0x000000000050B000-memory.dmp

    Filesize

    44KB