Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05/04/2024, 16:35

General

  • Target

    2024-04-05_6f3a345932e2bf107fa1167a4f5a777a_cryptolocker.exe

  • Size

    102KB

  • MD5

    6f3a345932e2bf107fa1167a4f5a777a

  • SHA1

    fcee59680fd6af2c9ed2f0ca912396f74f43f5af

  • SHA256

    e326f3d2e3348065458e79e03d9322e214571ebe1750993da2346d5e438011fb

  • SHA512

    4721d32a00440ca2a48caa6b5b170bde4e90617c2144a41057eacf5eded32dd7411fffa5db62cecf6b731c287d9686a9f63261d8d36630a2c3ba6cce3a4fbca3

  • SSDEEP

    768:XS5nQJ24LR1bytOOtEvwDpjNbZ7uyA36S7MpxRiWjzUNu5aT3h:i5nkFGMOtEvwDpjNbwQEIikgNJ

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\2024-04-05_6f3a345932e2bf107fa1167a4f5a777a_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-05_6f3a345932e2bf107fa1167a4f5a777a_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4888
    • 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:784

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    102KB

    MD5

    ca0c269a087aab649f46fac10788fd05

    SHA1

    b2ddd5b775bafbe6136d00d97f97dfae07b5c573

    SHA256

    43f7cf76d80f9b457627095a4c8ae7f8a1c90824f4ea70c5a3e7641877053b0e

    SHA512

    19cf5bceed856df3aa26c538740034e782f1ea89047db046cf3009b4c8e9473f1ca8e7484c8c8312235021a1151741a475778d8e1422c5fd2cb9694d294cef5f

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/784-18-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/784-20-0x0000000000640000-0x0000000000646000-memory.dmp

    Filesize

    24KB

  • memory/784-21-0x0000000000610000-0x0000000000616000-memory.dmp

    Filesize

    24KB

  • memory/784-49-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4888-0-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4888-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/4888-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/4888-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

    Filesize

    24KB

  • memory/4888-17-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB