Analysis

  • max time kernel
    150s
  • max time network
    147s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240221-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23/02/2024, 12:24

General

  • Target

    2024-02-23_039639897dfa9ce009814a85e3bea278_cryptolocker.exe

  • Size

    34KB

  • MD5

    039639897dfa9ce009814a85e3bea278

  • SHA1

    3717cfc4639e198e732e8f0a30f0a560de3b0c92

  • SHA256

    4bde26866a1ac68a478218301e9f70eabaebe88788906c1d8a528059eb1f3ca3

  • SHA512

    1f94d859e25964760acecfa3a021ea214cbf7f827b3777e591f83515a8a6ce2f9be8774197ed6cc00ccb0216138953debe6717ba34320c43b6b2fbafa1d017c2

  • SSDEEP

    384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6A0X/EIjhz:b/yC4GyNM01GuQMNXw2PSjH+PPhz

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Checks computer location settings 2 TTPs 1 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).

  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-02-23_039639897dfa9ce009814a85e3bea278_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-23_039639897dfa9ce009814a85e3bea278_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:5100
    • C:\Users\Admin\AppData\Local\Temp\retln.exe
      "C:\Users\Admin\AppData\Local\Temp\retln.exe"
      2⤵
      • Executes dropped EXE
      PID:2636

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          34KB

          MD5

          d106438f54a7f8f56938bcaae89dcb5e

          SHA1

          f39add7714cdc6620e98c179b9527324253e776b

          SHA256

          88bd3679069fb49248f709f567c52ee00cf70eed32c295a52b2a709bc6aca660

          SHA512

          69da391154def502d24c41fc4617b20e29db8dc926e874f90d4355b3da6b2f9d24b996ee75bd8c1acefabf19a53f64ac6bf07da33c186869dee5677ea4afdc08

        • memory/2636-24-0x0000000002020000-0x0000000002026000-memory.dmp

          Filesize

          24KB

        • memory/5100-0-0x00000000022D0000-0x00000000022D6000-memory.dmp

          Filesize

          24KB

        • memory/5100-1-0x00000000022D0000-0x00000000022D6000-memory.dmp

          Filesize

          24KB

        • memory/5100-2-0x0000000000400000-0x0000000000406000-memory.dmp

          Filesize

          24KB