Analysis

  • max time kernel
    130s
  • max time network
    124s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24/05/2024, 22:42

General

  • Target

    2024-05-24_9443b0f2f583ade9b12a3f1c73fb4ff3_cryptolocker.exe

  • Size

    77KB

  • MD5

    9443b0f2f583ade9b12a3f1c73fb4ff3

  • SHA1

    43da156b1db7475a849680ea34e1cd4a1abc0bf7

  • SHA256

    67bdc1c33c46b118d434794b33873ae0966be15755a84b7d444fa3f3e4054a38

  • SHA512

    db9803e23bbec7dcf3e674422aaeffff1c8a8d8ced79dd1c8efcdbf14f246492d772d0229a9364746349e337a98aaf8d1e5bdd8bed6b694353ee7bd939bc8073

  • SSDEEP

    1536:vj+jsMQMOtEvwDpj5HwYYTjipvF2hBfIufC:vCjsIOtEvwDpj5H9YvQd2u

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\2024-05-24_9443b0f2f583ade9b12a3f1c73fb4ff3_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-24_9443b0f2f583ade9b12a3f1c73fb4ff3_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3920
    • 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:4944

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    77KB

    MD5

    6b9b7f87a0af7dc801dbcaf0735b5a3e

    SHA1

    491afba00743c48d43cd3379f5426bf1671a7366

    SHA256

    d114a2ae77f0047531c3264832b0075f670edabf6afaa4fd232befca18b06bb6

    SHA512

    4e06a4cd3ef58eef5f11c6b84758aab627863b253e71f527709c3ead98eb04375df72ea9503204fdf81438fde59cf4d62e9c5a43c187d1f7b7d3be149a781e98

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/3920-0-0x00000000005A0000-0x00000000005A6000-memory.dmp

    Filesize

    24KB

  • memory/3920-8-0x00000000005A0000-0x00000000005A6000-memory.dmp

    Filesize

    24KB

  • memory/3920-1-0x00000000005D0000-0x00000000005D6000-memory.dmp

    Filesize

    24KB

  • memory/4944-17-0x00000000006D0000-0x00000000006D6000-memory.dmp

    Filesize

    24KB

  • memory/4944-23-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB