Analysis

  • max time kernel
    90s
  • max time network
    124s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03-02-2024 05:37

General

  • Target

    2024-02-03_a2af5a8b387006c7c312ff29f7ba390c_cryptolocker.exe

  • Size

    83KB

  • MD5

    a2af5a8b387006c7c312ff29f7ba390c

  • SHA1

    9b877c00a53670d2685c554bd7905ae46e313214

  • SHA256

    322c8722a5c8935e0489cfdb94e2e0d0226060c79cfa632a919255b1531bcf28

  • SHA512

    f761db82e4179aed77bf99e8c5c5280b9ecd99f7518b93e0afa4e00523e2cbfef581ed9be029d5e32bc5feb3fb6cc81b7c33ad96486b7c3a488e7a0897fa9e29

  • SSDEEP

    768:XS5nQJ24LR1bytOOtEvwDpjNbZ7uyA36S7MpxRXrZSUfFKazNclMjNUvA:i5nkFGMOtEvwDpjNbwQEI8UtzNcO8A

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 3 IoCs
  • Detects executables built or packed with MPress PE compressor 5 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\2024-02-03_a2af5a8b387006c7c312ff29f7ba390c_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-03_a2af5a8b387006c7c312ff29f7ba390c_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2884
    • 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:3416

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    83KB

    MD5

    c486223c808bf75f68b39847bf813a78

    SHA1

    b88dbb50fd1a2717b306e752c96634e9af675cdd

    SHA256

    2fd7f5fe2318d85c37873d9bcd909edb4130ed5dba9d6d5357f8edac3c601bd9

    SHA512

    8eeb91f12b8de5fe2726fe6849a3ba6e91f38e411f7988d7d535ee3a031ddb09df46c23768c1b436190a5270018818c50e361a0883b4e6a6be277b5a581ba955

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2884-0-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/2884-1-0x00000000007B0000-0x00000000007B6000-memory.dmp

    Filesize

    24KB

  • memory/2884-2-0x00000000007B0000-0x00000000007B6000-memory.dmp

    Filesize

    24KB

  • memory/2884-3-0x00000000021B0000-0x00000000021B6000-memory.dmp

    Filesize

    24KB

  • memory/2884-17-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/3416-18-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/3416-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/3416-22-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/3416-49-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB