Analysis

  • max time kernel
    130s
  • max time network
    147s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24/01/2024, 12:32

General

  • Target

    2024-01-24_a2756463f56d1260c0b4e28a596df677_cryptolocker.exe

  • Size

    125KB

  • MD5

    a2756463f56d1260c0b4e28a596df677

  • SHA1

    5d46d247f49407cef5e9553426caad46cb2aa830

  • SHA256

    337f7823a13d3e783cbb6e867e7a496ffd4a340da4ac8f45f70e591e2ee54013

  • SHA512

    89535a8e0839aed9ac3ff382bb6e136b8bc058692a539c00e82237879d534bec27a27d98224980f954343f61b073b3fd033904d3cb057f5501959ed38f04e88c

  • SSDEEP

    1536:vj+jsMQMOtEvwDpj5HwYYTjipvF2hBfIuBKLUYOVbvh//h:vCjsIOtEvwDpj5H9YvQd2Rf

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 6 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-01-24_a2756463f56d1260c0b4e28a596df677_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-24_a2756463f56d1260c0b4e28a596df677_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4768
    • 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:1764

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    125KB

    MD5

    1369ae640f8dda43ca2754fb9e934132

    SHA1

    763d74993a86016937a1b7743001db6b422fa83d

    SHA256

    3394fc0ae11dcea003d908a611355609bed67376f69c97fd501dacecded8314b

    SHA512

    fd21cb77b86f5f175a3ffb31cc15a8f84e483b4d66b5c400f99d173862ff1e6d7b9feae8c1be0ae1ac95fd998de1465e7b6e527b696d67ef1757ddfd63a1b847

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1764-17-0x00000000005E0000-0x00000000005E6000-memory.dmp

    Filesize

    24KB

  • memory/1764-19-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/4768-0-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/4768-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/4768-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB