Analysis

  • max time kernel
    90s
  • max time network
    126s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    09/04/2024, 04:26

General

  • Target

    2024-04-09_dc4a3b67600417cc52592822d9bba0c4_cryptolocker.exe

  • Size

    86KB

  • MD5

    dc4a3b67600417cc52592822d9bba0c4

  • SHA1

    c92005f1935770174cc2608d80beaadfff5569af

  • SHA256

    0feac25b8deeb6ae15d32301749e5818f37144ff51cc22a149e63c4150cbd0a2

  • SHA512

    74cdb212b5ce415ab04e9a14904aa5e00112b9db9b579583c187bcc5f2994634a0fc31bb480d6542b5daa52005be7ac72dbf232c24cf7e6652e7d90df7468609

  • SSDEEP

    768:XS5nQJ24LR1bytOOtEvwDpjNbZ7uyA36S7MpxRXrZSUfFKazNclMjNUvxpRR:i5nkFGMOtEvwDpjNbwQEI8UtzNcO8P

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\2024-04-09_dc4a3b67600417cc52592822d9bba0c4_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-09_dc4a3b67600417cc52592822d9bba0c4_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4152
    • 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:3864

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    86KB

    MD5

    efe2680ea4820e317a836ecdc0ec7568

    SHA1

    2b4fa58195035c315012f2e595b2ef52e299d6c4

    SHA256

    5f19de4e8593df2d96bfdd8cf595af681f22b9f22c3a178b8bff589ca7c57f33

    SHA512

    e722d31a9181a5148cc21e1814a55944b8dc52c487b25c7cd3215602a859548f00a953a306b73dcf9b1c7cd65150b8b27464efecd21d453c9caffac1b24a5f7d

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/3864-18-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/3864-20-0x0000000000750000-0x0000000000756000-memory.dmp

    Filesize

    24KB

  • memory/3864-23-0x0000000000730000-0x0000000000736000-memory.dmp

    Filesize

    24KB

  • memory/3864-49-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4152-0-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4152-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

    Filesize

    24KB

  • memory/4152-2-0x00000000005A0000-0x00000000005A6000-memory.dmp

    Filesize

    24KB

  • memory/4152-3-0x00000000005C0000-0x00000000005C6000-memory.dmp

    Filesize

    24KB

  • memory/4152-16-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB