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Analysis

  • max time kernel
    137s
  • max time network
    141s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11/02/2024, 13:38

General

  • Target

    2024-02-11_df0ac49b573f15d19c8a8cf308508e77_cryptolocker.exe

  • Size

    125KB

  • MD5

    df0ac49b573f15d19c8a8cf308508e77

  • SHA1

    3722c132934f58021448ef04f71add0d1e1f1250

  • SHA256

    f71c753e6a85d59e3f6243d557892b96da677c11713b567f819fd63645f6951c

  • SHA512

    f21449f69c82035d631177cb4ec30f0bb45c73577ea6b7803018c40dccb1cfdc68e6b7085f36e1ab585254fd8104dde37f9e1d0957c5c3e709d2df929fcffea4

  • SSDEEP

    1536:gUj+AIMOtEvwDpjNbwQEIPlemUhYwkkxGBpMa:vCA9OtEvwDpj5

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 5 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-02-11_df0ac49b573f15d19c8a8cf308508e77_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-11_df0ac49b573f15d19c8a8cf308508e77_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4884
    • 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:1444

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    126KB

    MD5

    fe8ac11e208eac3529a1a7d060242a99

    SHA1

    2de43f78aafde4c3f5ba35bda7927a593d42ef98

    SHA256

    f7a1169b5c737486faca5623b155e7c9be6d02c0242a991492e126290ed68c95

    SHA512

    b5e4082476aca81da440a20bd2b2d4e00cffa7651bba63b1fd5468eafcd11f58654f2ba6595d0406ba0c55f1a52a88583d2f984527d79dae40a45bb6eb3d33cb

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1444-17-0x00000000006D0000-0x00000000006D6000-memory.dmp

    Filesize

    24KB

  • memory/1444-22-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB

  • memory/4884-0-0x0000000002290000-0x0000000002296000-memory.dmp

    Filesize

    24KB

  • memory/4884-1-0x0000000002290000-0x0000000002296000-memory.dmp

    Filesize

    24KB

  • memory/4884-2-0x00000000021A0000-0x00000000021A6000-memory.dmp

    Filesize

    24KB