Analysis

  • max time kernel
    88s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27-01-2024 19:36

General

  • Target

    2024-01-27_a103853a08b84eaafb405fe29784786e_cryptolocker.exe

  • Size

    125KB

  • MD5

    a103853a08b84eaafb405fe29784786e

  • SHA1

    c7046b07b62bf00ecb1d9f55c5f0c0628edbdc3a

  • SHA256

    ab3e2ce039ff5b197180d69055ebf5b9b46d0705f6737be170ab7c24bc1ab2d2

  • SHA512

    f48b7d43fc88343dabe424fac882d32692e59989c3ba15aa2aaf82917c0b531ca77d959341c17255b2150f20fbbae72dd4f2fb23203e938a3eb62aaae9b5233e

  • SSDEEP

    1536:gUj+AIMOtEvwDpjNbwQEIPlemUhYwkkxGBpBQ:vCA9OtEvwDpjm

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Detection of Cryptolocker Samples 1 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\2024-01-27_a103853a08b84eaafb405fe29784786e_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-27_a103853a08b84eaafb405fe29784786e_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4912
    • 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:1704

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    125KB

    MD5

    670f99bc73692558e39f651c9465763e

    SHA1

    c6559b83c6bbaf0e693e8605fc136d24a99659b8

    SHA256

    c917e4aeddef50d0100e5e90269279577cafc1f0dbc66daacd23880d5b76029d

    SHA512

    9121dc4c0d214138f1aa089ab4c270ec7e702af53bd464e823cf816f2011040c93ebcce0dc1583643cd1b6239aa88c452dc9ae47388429426fdb931a1a3925db

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1704-23-0x0000000000560000-0x0000000000566000-memory.dmp

    Filesize

    24KB

  • memory/1704-17-0x00000000006C0000-0x00000000006C6000-memory.dmp

    Filesize

    24KB

  • memory/4912-2-0x0000000000610000-0x0000000000616000-memory.dmp

    Filesize

    24KB

  • memory/4912-1-0x00000000005F0000-0x00000000005F6000-memory.dmp

    Filesize

    24KB

  • memory/4912-0-0x00000000005F0000-0x00000000005F6000-memory.dmp

    Filesize

    24KB