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Analysis

  • max time kernel
    88s
  • max time network
    126s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23/01/2024, 06:31

General

  • Target

    2024-01-23_a00b94058765e8563bace1d3546a470e_cryptolocker.exe

  • Size

    45KB

  • MD5

    a00b94058765e8563bace1d3546a470e

  • SHA1

    af31adf999e2cea3e83b1f5a747fde57d9c91219

  • SHA256

    19cbf186adafecbb1ce13f1d954753c5cbd16c310135726c009af62622aa3bec

  • SHA512

    6183bcd50ee558983fe3fb81f1272e8b7c55d6ce842387d2708399e2e2b16ebed2b9f53d08c7a2031bde16e5389d58c02c868f22f64398741d93799e754dd91a

  • SSDEEP

    768:vQz7yVEhs9+js1SQtOOtEvwDpjz9+4/Uth8igNrr46xdUU8:vj+jsMQMOtEvwDpj5Hczer5iP

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Detection of Cryptolocker Samples 1 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\2024-01-23_a00b94058765e8563bace1d3546a470e_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-23_a00b94058765e8563bace1d3546a470e_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1920
    • 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:1444

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    45KB

    MD5

    ab3dd133d1af4de7784786a1edda0dc0

    SHA1

    b7636cbc489d9619daa9fe7b925ffc43e61081ae

    SHA256

    489474df5173fb3146b159db13c18565a1de302ad3ce8d0afd9a4b8fb4bc9644

    SHA512

    a1a04fd6b55126268adf71ba62cc45805e936faa5ac74500cd1aff38793b716139c457a63633d22a1dde62ce4ec7b42974107b0658212ca2d4e91310c5e752f5

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1444-17-0x00000000005E0000-0x00000000005E6000-memory.dmp

    Filesize

    24KB

  • memory/1444-18-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/1920-0-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/1920-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/1920-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB