Analysis

  • max time kernel
    142s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24/01/2024, 01:23

General

  • Target

    2024-01-24_1cfdc1fe782bf68b83d0baeecd257a68_cryptolocker.exe

  • Size

    44KB

  • MD5

    1cfdc1fe782bf68b83d0baeecd257a68

  • SHA1

    c438d90d863f0ec9f780c107755b4bba08703e30

  • SHA256

    afe8eb7dd23f34331829bc2c606880cd17c3710e496748462188967bad3e0766

  • SHA512

    45422fdb3bf8994127fff03629dbfa6190d5f7170a608689cba3ba0c9288eeef1e97b36f40259c1b12241eca9e3f656985f4a711c3a20fc97d8e44787ba3b39c

  • SSDEEP

    768:UEEmoQDj/xnMp+yptndwe/PWQtOOtEvwDpjIm8z2iaSIO/WZrEu/d+qmsUHQ1wsz:ZzFbxmLPWQMOtEvwDpj386Sj/WprqQ1d

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 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\2024-01-24_1cfdc1fe782bf68b83d0baeecd257a68_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-24_1cfdc1fe782bf68b83d0baeecd257a68_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1832
    • 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:4840

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    44KB

    MD5

    7214e841cb91ea992f8def1fa1dc078a

    SHA1

    5eebdef0fe760147dd574e2d91359645dcd96c4d

    SHA256

    38982c4edc0d1e47ba01715a61f6ad982191cbcb6a8cac02f7430ffebf348fad

    SHA512

    6fea67e294f722d91445604b3f654ad5a046d854c6ee2314556ea6069d9c8bef4a1bea6ed1787a5a69a45d155856a8c922477f1bd4d28b77af884444c1674e70

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1832-0-0x00000000004E0000-0x00000000004E3000-memory.dmp

    Filesize

    12KB

  • memory/1832-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/1832-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/1832-3-0x00000000007D0000-0x00000000007D6000-memory.dmp

    Filesize

    24KB

  • memory/1832-18-0x00000000004E0000-0x00000000004E3000-memory.dmp

    Filesize

    12KB

  • memory/4840-17-0x00000000004E0000-0x00000000004E3000-memory.dmp

    Filesize

    12KB

  • memory/4840-20-0x0000000002050000-0x0000000002056000-memory.dmp

    Filesize

    24KB

  • memory/4840-21-0x0000000002070000-0x0000000002076000-memory.dmp

    Filesize

    24KB