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Analysis

  • max time kernel
    13s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7-20240419-en
  • resource tags

    arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system
  • submitted
    30/04/2024, 17:28

General

  • Target

    2024-04-30_9e8c9c15840dba312d3ce09bb9de9936_cryptolocker.exe

  • Size

    34KB

  • MD5

    9e8c9c15840dba312d3ce09bb9de9936

  • SHA1

    5f59d645be5f9c64aa84d8a22c5f18d80e4e75ab

  • SHA256

    157c9fcf0777cc4e60bd212bb999515ccb0aa916f78aa744543459513c4bad97

  • SHA512

    703e2d1c20df435fde1e188775e4c64de8c495e0e95196ff523c3d22049f0be80d001eb1541c456ed7f7c91d444218ca1ca45be842c9c3808d33203339c2e569

  • SSDEEP

    384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6A0MFNeGQn:b/yC4GyNM01GuQMNXw2PSjH+VGQn

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Creates a large amount of network flows 1 TTPs

    This may indicate a network scan to discover remotely running services.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Suspicious use of UnmapMainImage 2 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-04-30_9e8c9c15840dba312d3ce09bb9de9936_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-30_9e8c9c15840dba312d3ce09bb9de9936_cryptolocker.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of UnmapMainImage
    • Suspicious use of WriteProcessMemory
    PID:992
    • C:\Users\Admin\AppData\Local\Temp\retln.exe
      "C:\Users\Admin\AppData\Local\Temp\retln.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of UnmapMainImage
      PID:2056

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    34KB

    MD5

    2e3120757ae33f0dbe43e5cbd7436abb

    SHA1

    55d786adab6fac61c5048cbe13d26902f1752d4c

    SHA256

    89237efa7c5a3f25a1b5422e579ec14fdd307b2858589f513f00cf6b6f69fe09

    SHA512

    0b00754c38d3bc79ebe2aee9f0db0d70ad17f07ad4a617f980d80ed264ce3f62080844419c970862f53e411edd697a0a2dadc1cbf4787ddda1c9f806d87a352e

  • memory/992-0-0x00000000003E0000-0x00000000003E6000-memory.dmp

    Filesize

    24KB

  • memory/992-1-0x0000000000400000-0x0000000000406000-memory.dmp

    Filesize

    24KB

  • memory/992-7-0x00000000003E0000-0x00000000003E6000-memory.dmp

    Filesize

    24KB

  • memory/2056-23-0x0000000000310000-0x0000000000316000-memory.dmp

    Filesize

    24KB