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Analysis

  • max time kernel
    144s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13/02/2024, 13:08

General

  • Target

    2024-02-13_c2549664ca1bfc8f92b6b4b7e2108a7a_cryptolocker.exe

  • Size

    57KB

  • MD5

    c2549664ca1bfc8f92b6b4b7e2108a7a

  • SHA1

    d0448728fc3f3110326c7a4bccdec476811d671b

  • SHA256

    43a22394a89719a34435fecb84c20d51652a8cc13994bd31f720e73342528e7d

  • SHA512

    52d7650a077d16d358edcaf5bc34a5a4f39d828811d4da7ad21610e9245657bc92309fb8ae91b8cdf769e19fa184505dfd5f3948a09968db363fe2895310975d

  • SSDEEP

    1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61PTG:BbdDmjr+OtEvwDpjMY

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 2 IoCs
  • UPX dump on OEP (original entry point) 4 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\2024-02-13_c2549664ca1bfc8f92b6b4b7e2108a7a_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-13_c2549664ca1bfc8f92b6b4b7e2108a7a_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4136
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:4760

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    57KB

    MD5

    98a6d9bf4d66249fef3607221661488c

    SHA1

    db9eab97e87122c95795d96f70f52114e5ed886e

    SHA256

    9910a04703769eb0f58aee7246fdbcd2ce23d4f205a0f9686aac5afb1951ddb8

    SHA512

    6e17e0925467a96cccc2b8e7c75648b2819976f749fc26370ae1fdd1bf3ddc03111b1bc80ec34bb18d8e56f8fe5ec2dfbeb38af235d163a5b0c522c2ea326b08

  • memory/4136-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4136-1-0x0000000000830000-0x0000000000836000-memory.dmp

    Filesize

    24KB

  • memory/4136-2-0x0000000000830000-0x0000000000836000-memory.dmp

    Filesize

    24KB

  • memory/4136-3-0x0000000000850000-0x0000000000856000-memory.dmp

    Filesize

    24KB

  • memory/4136-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4760-19-0x00000000006C0000-0x00000000006C6000-memory.dmp

    Filesize

    24KB

  • memory/4760-20-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/4760-26-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB