Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23-05-2024 22:24

General

  • Target

    2024-05-23_3538fb5307cb157678933f6f97a75983_cryptolocker.exe

  • Size

    43KB

  • MD5

    3538fb5307cb157678933f6f97a75983

  • SHA1

    a5f735aea81434d194812d3311c00f79390b3e26

  • SHA256

    67af82685aa9ee6569a433978ff9690bc940e12d979542311f543d6f3668e82b

  • SHA512

    c50843b79a8e44a6b36d59887e662bc76b3f15d07606ba81d3ceec61517ecc4fc04080dcf797644c208734761c21cbcafed1dfceda84b5188486c4fa040a46a7

  • SSDEEP

    768:vQz7yVEhs9+js1SQtOOtEvwDpjz9+4REL+cc66TcW:vj+jsMQMOtEvwDpj5HW5scW

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\2024-05-23_3538fb5307cb157678933f6f97a75983_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-23_3538fb5307cb157678933f6f97a75983_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:264
    • 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:4916

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    44KB

    MD5

    4a88ce7323c7a443de0f62c6dfd5a35f

    SHA1

    f18005fcb7e79865dbd2ac8d56314940a05d412a

    SHA256

    39c31c6d7c10ad60ea56bf83192dc5305af382157b9ec25738e1d68c38816f66

    SHA512

    c90b6daf581e665ffe685798f584f6dc47ebac73c4bbb1151773ab40cd57561f8a829468bf70a9ffad748c39941041c547993c4267492e1ee1a7acb1c7cab07e

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/264-0-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/264-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/264-2-0x0000000000870000-0x0000000000876000-memory.dmp

    Filesize

    24KB

  • memory/4916-23-0x0000000001FD0000-0x0000000001FD6000-memory.dmp

    Filesize

    24KB

  • memory/4916-17-0x0000000002000000-0x0000000002006000-memory.dmp

    Filesize

    24KB