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Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14/03/2024, 20:30

General

  • Target

    2024-03-14_601ae5e578b2e52febb898ffe1cc94c3_cryptolocker.exe

  • Size

    40KB

  • MD5

    601ae5e578b2e52febb898ffe1cc94c3

  • SHA1

    13ade15c74fc1f4bee2abc104f9d7edaba05a786

  • SHA256

    91144597fac810a2a07fbb9a9ae9f28985d9cab7e4d1dd63756fb6fe80977d05

  • SHA512

    3a5184c7634ff702d18e08acdd2c027c6cf134fb9eeb2de4bff1015a4297bafdde9c5f870402722c7ed370948e7e8f0f55cb0491d330feb5d588e6da743853eb

  • SSDEEP

    384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6AJvDSuYlxujsFwY:b/yC4GyNM01GuQMNXw2PSjHPbSuYlaJY

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\2024-03-14_601ae5e578b2e52febb898ffe1cc94c3_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-14_601ae5e578b2e52febb898ffe1cc94c3_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4476
    • C:\Users\Admin\AppData\Local\Temp\retln.exe
      "C:\Users\Admin\AppData\Local\Temp\retln.exe"
      2⤵
      • Executes dropped EXE
      PID:3952

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    40KB

    MD5

    40a7cf45647eab8958fe72bbd6cede81

    SHA1

    9014e5b287510cde2839a44148b1f6adba48641f

    SHA256

    8504ff3bf2269fc95f2c11e561f090f2c33401e34ab6c64e31637aeaecac933c

    SHA512

    317ddb7358dae7c6ae932f1fa90d70f75061ae5131c6e74f9e35f787e9928db3b4bfc7ca2127445a764b73632e12bc8df90df0b3afdc45080167f1416f630962

  • memory/3952-21-0x00000000005A0000-0x00000000005A6000-memory.dmp

    Filesize

    24KB

  • memory/4476-0-0x00000000020E0000-0x00000000020E6000-memory.dmp

    Filesize

    24KB

  • memory/4476-1-0x00000000020E0000-0x00000000020E6000-memory.dmp

    Filesize

    24KB

  • memory/4476-2-0x0000000000400000-0x0000000000406000-memory.dmp

    Filesize

    24KB