Analysis

  • max time kernel
    142s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18-01-2024 13:15

General

  • Target

    2024-01-18_a3b97cd6fc55f113b91d928ee7fe58f3_cryptolocker.exe

  • Size

    88KB

  • MD5

    a3b97cd6fc55f113b91d928ee7fe58f3

  • SHA1

    0eac49cd880f0a908ec7a9f0c263e8ca83fc50ca

  • SHA256

    007f0363b4f690802952a294790ac215d99cc77b7b27f38b9120983b60fe602e

  • SHA512

    5d2480ab3333498d53a5817d2eb4a7250b8cb2e005a826ffcfbe2f4000a50f3bc7d7b44d56f53fe8727fd52d4b416b32517e09f9db4458f3ae303dd2a5b5f742

  • SSDEEP

    768:xQz7yVEhs9+4uR1bytOOtEvwDpjWfbZ7uyA36S7MpxRXrZSUfFKazNcCJgW:xj+VGMOtEvwDpjubwQEI8UtzNcsH

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 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-01-18_a3b97cd6fc55f113b91d928ee7fe58f3_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-18_a3b97cd6fc55f113b91d928ee7fe58f3_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3020
    • 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:4652

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    88KB

    MD5

    072a5378185dec46d1e0d3630f9dce15

    SHA1

    d5a4e437d3c08a98c5794fd6b3438f9429a20398

    SHA256

    3fce3b0e3779bbb2fc18bba643f0bda1530de4aabf9e52e32f61c984376b49c9

    SHA512

    fed7a70a330b31ef188c319162f301b345799a47166b6c00b3ebfe2e9d984e441c614efef1f4741bda94db142907ce2ab929973c43404a1b29e9d6ec449ec273

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/3020-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3020-1-0x00000000007C0000-0x00000000007C6000-memory.dmp

    Filesize

    24KB

  • memory/3020-2-0x00000000007C0000-0x00000000007C6000-memory.dmp

    Filesize

    24KB

  • memory/3020-3-0x0000000002100000-0x0000000002106000-memory.dmp

    Filesize

    24KB

  • memory/3020-49-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4652-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4652-19-0x0000000000520000-0x0000000000526000-memory.dmp

    Filesize

    24KB

  • memory/4652-20-0x0000000000680000-0x0000000000686000-memory.dmp

    Filesize

    24KB

  • memory/4652-48-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB