Analysis

  • max time kernel
    141s
  • max time network
    130s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-05-2024 15:46

General

  • Target

    2024-05-21_8e4e26f511c95373b1181f2f1b6143f3_cryptolocker.exe

  • Size

    62KB

  • MD5

    8e4e26f511c95373b1181f2f1b6143f3

  • SHA1

    e38d533aca72d2f5f504379b695f3a2ab11bcaf6

  • SHA256

    37f8c77c5c10b367963787cbc06a5eeb091f0e8c679a9e8ef2a149b8865dd0d0

  • SHA512

    0b986558234a3ccd1f3226ef5a5cc52d1e93deab6c9adad158239970763002c2280402d9ddc1133f8d134b1e4ae52447d233f54f48be9f8c5adb9b580ab2694c

  • SSDEEP

    1536:Tj+jsMQMOtEvwDpj5HmpJpOUHECgNMo0vp2EMNuSK:TCjsIOtEvwDpj5HE/OUHnSMZx

Score
9/10

Malware Config

Signatures

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

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-21_8e4e26f511c95373b1181f2f1b6143f3_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-21_8e4e26f511c95373b1181f2f1b6143f3_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4268
    • 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:228

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    62KB

    MD5

    2ce303d51c632c50f7c53adc7e443e3c

    SHA1

    ac2e00723f6bcba9a8d9aca912a64ef1e59845df

    SHA256

    359fcf75c6e5c37259d599bd9d046ba26494fa0bd739c635df36b9365e6f8298

    SHA512

    34f54c50ffc6e1a0c2448cbe020c8b16b5716845a0dce7a4b84b06632b31cbd8c4a49fe0603b293e947edc668762a2a35e3b48252dd25188af7a1356e16d4d32

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/228-17-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/228-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/228-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/228-49-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/4268-0-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/4268-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB

  • memory/4268-2-0x00000000020F0000-0x00000000020F6000-memory.dmp

    Filesize

    24KB

  • memory/4268-9-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB

  • memory/4268-18-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB