Analysis

  • max time kernel
    94s
  • max time network
    100s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11-05-2024 14:17

General

  • Target

    2024-05-11_f59decbad7b8b69280e670c74996fb63_cryptolocker.exe

  • Size

    57KB

  • MD5

    f59decbad7b8b69280e670c74996fb63

  • SHA1

    d0eb5464c8ef25697d2e5e1db03f183749d08018

  • SHA256

    46fb891c5563abe506f79ed9831354774b36bd48b4bf13f9e506d9bec1951d5f

  • SHA512

    97235733e15d5592dcd1ed3b3024ab97c4a94e27b32c96d00d6a54e981b7924431baf9c18c78862f967b3501db3bcfe004cf53e704f6bdd7872ac61d3bbefb26

  • SSDEEP

    768:vQz7yVEhs9+js1SQtOOtEvwDpjz9+4hdCW1nw71TkhsiPn1YFv6dl4Gt:vj+jsMQMOtEvwDpj5HH1nw73KOFiT

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\2024-05-11_f59decbad7b8b69280e670c74996fb63_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-11_f59decbad7b8b69280e670c74996fb63_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4864
    • 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:4136

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    57KB

    MD5

    51c1cc0565a5783084cceee4defbb9f0

    SHA1

    1c934f172bd512b19bf239fd80f8cf27331521ae

    SHA256

    c8689f84acc2c5e2d85e0f647f52b31f267eafc7df9659046999ca187579519d

    SHA512

    e68fc264a3fe08a24a8f3dbbb54d43a9cdd828544f18651ecf450f42d419e4d143eba7605ebd74d067c4637553b8cc5b5392766ce4da33dd845bb43bd44a5f52

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/4136-17-0x00000000005D0000-0x00000000005D6000-memory.dmp

    Filesize

    24KB

  • memory/4136-23-0x00000000005A0000-0x00000000005A6000-memory.dmp

    Filesize

    24KB

  • memory/4864-0-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/4864-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/4864-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB