Analysis

  • max time kernel
    134s
  • max time network
    125s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23-05-2024 02:30

General

  • Target

    2024-05-23_5af901ecd859b54c82c26c7822d1a42f_cryptolocker.exe

  • Size

    97KB

  • MD5

    5af901ecd859b54c82c26c7822d1a42f

  • SHA1

    65963cd1e7d52958ebafdbd00b017b345142e313

  • SHA256

    84f5a67954d26e4e23bd497a719d299c2778c4b568e480d23e61e6e6fe08331b

  • SHA512

    8b9ae8b6f9a22fa6c1e89b10915c815c923cf5205503c2eed816f9e057efb20ce730c19c011f66ba9b3058f96f9b1ea5bff51cc132a5c960d53643a7a55b4459

  • SSDEEP

    768:xQz7yVEhs9+4uR1bytOOtEvwDpjWfbZ7uyA36S7MpxRiWNa9mktJY8:xj+VGMOtEvwDpjubwQEIiVmks8

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 5 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 10 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-23_5af901ecd859b54c82c26c7822d1a42f_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-23_5af901ecd859b54c82c26c7822d1a42f_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2256
    • 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:436

Network

MITRE ATT&CK Matrix ATT&CK v13

Defense Evasion

Subvert Trust Controls

1
T1553

Install Root Certificate

1
T1553.004

Modify Registry

1
T1112

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

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

    97KB

    MD5

    f241998c20f42ec5ca278b420125b2b3

    SHA1

    3cb0d9072cacb4aa6bad142eaa46ea21eb57d679

    SHA256

    4abcc14fad437529790ffed940bc1d1e77d46f8e42e367558305a559077821ab

    SHA512

    c1c0dcb068e104fcb74bb811394a6724e63f22da45b5756b988e14cb9f80bda465f6d2170ebd11c44d73702d5d5de64a4250a52b75e59070904255e63da7eb67

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

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/436-17-0x0000000000500000-0x0000000000510000-memory.dmp
    Filesize

    64KB

  • memory/436-26-0x00000000006B0000-0x00000000006B6000-memory.dmp
    Filesize

    24KB

  • memory/436-49-0x0000000000500000-0x0000000000510000-memory.dmp
    Filesize

    64KB

  • memory/2256-0-0x0000000000500000-0x0000000000510000-memory.dmp
    Filesize

    64KB

  • memory/2256-1-0x0000000000520000-0x0000000000526000-memory.dmp
    Filesize

    24KB

  • memory/2256-9-0x0000000000520000-0x0000000000526000-memory.dmp
    Filesize

    24KB

  • memory/2256-2-0x0000000002070000-0x0000000002076000-memory.dmp
    Filesize

    24KB

  • memory/2256-16-0x0000000000500000-0x0000000000510000-memory.dmp
    Filesize

    64KB