Analysis

  • max time kernel
    16s
  • max time network
    118s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    25-01-2024 17:40

General

  • Target

    2024-01-25_ea1c97d4a55233587d16fea3d2118c22_cryptolocker.exe

  • Size

    38KB

  • MD5

    ea1c97d4a55233587d16fea3d2118c22

  • SHA1

    c268a4b78ff6bc5f9b59729d0351c4c973b3db52

  • SHA256

    3e6b5e3b5e794c5ed3fac5bf9fb824072730bf7e6816432132088386f186a3b3

  • SHA512

    cd12ca2537e37dda3d48d34b3b807139bffb612f2232469baf0819989e81102291ad52b097f3ec4068d282059f9a8f431602123b59720b7058af771c00a8dc62

  • SSDEEP

    384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6AJvDSuYlxu2x:b/yC4GyNM01GuQMNXw2PSjHPbSuYl3

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\2024-01-25_ea1c97d4a55233587d16fea3d2118c22_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-25_ea1c97d4a55233587d16fea3d2118c22_cryptolocker.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of UnmapMainImage
    • Suspicious use of WriteProcessMemory
    PID:1768
    • 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:2700

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    39KB

    MD5

    62cc778e5f787e41e077c63cf9b7d2cb

    SHA1

    3ed1e59f498e3044b9a56d6ae7d98156b262330a

    SHA256

    6131bff917f0b6b21e967a1f77cb99f4482e092d71495a57fef69a6947e95562

    SHA512

    4877be93aada7e78cb00043c23ebe2e065b0b312512bdfadea6ec31181186bfaac22833d6f1d7581507790b3bfeb9d44a7abfd763dee2745348b994a97e95d3a

  • memory/1768-0-0x0000000000410000-0x0000000000416000-memory.dmp
    Filesize

    24KB

  • memory/1768-1-0x0000000000400000-0x0000000000406000-memory.dmp
    Filesize

    24KB

  • memory/1768-8-0x0000000000410000-0x0000000000416000-memory.dmp
    Filesize

    24KB

  • memory/2700-20-0x0000000000310000-0x0000000000316000-memory.dmp
    Filesize

    24KB