Analysis

  • max time kernel
    145s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25-01-2024 04:38

General

  • Target

    2024-01-25_77bc45684282cffe7b3ca5d3dafa0d25_cryptolocker.exe

  • Size

    50KB

  • MD5

    77bc45684282cffe7b3ca5d3dafa0d25

  • SHA1

    74fa5b171721525aaf6f50bfd3f04985ca57dfe7

  • SHA256

    23d396a0830833ea96d86a8cc729cf26888c6a24390baaa0b234d96ae9177340

  • SHA512

    2c836c4c5b9bc1d325d6e9ec504b4c8089ce6ef4f7804f47a989160af7b5268033adabaa0f450224abf2dcbb7f15693986806713d5c19a74d30a6703605f6bc9

  • SSDEEP

    768:vQz7yVEhs9+js1SQtOOtEvwDpjz9+4/Uth8igNrr42A7n0Fmy7dm:vj+jsMQMOtEvwDpj5HczerLO04y7dm

Score
9/10

Malware Config

Signatures

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

  • Modifies system certificate store 2 TTPs 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-01-25_77bc45684282cffe7b3ca5d3dafa0d25_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-25_77bc45684282cffe7b3ca5d3dafa0d25_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4212
    • C:\Users\Admin\AppData\Local\Temp\misid.exe
      "C:\Users\Admin\AppData\Local\Temp\misid.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Modifies system certificate store
      PID:4736

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    50KB

    MD5

    6dc79f3750231c2ae5aa4a42cd40b38f

    SHA1

    2477838c94a98658ab6c2057f5db11f103143b83

    SHA256

    63445424144b5f7caf7bf69d60185cac8ddf373a304cfebc7cb8215da3f4f28e

    SHA512

    7a9bcf46dd784720ebcacf7036fe99d5f10186d541ef6932ca22cae7f7a0d48d18f85e7f47a145f8e5cfda689d555c17382a1090e7c4abb96eee8464c327c1d7

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/4212-0-0x00000000005A0000-0x00000000005A6000-memory.dmp

    Filesize

    24KB

  • memory/4212-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

    Filesize

    24KB

  • memory/4212-2-0x00000000005C0000-0x00000000005C6000-memory.dmp

    Filesize

    24KB

  • memory/4736-18-0x0000000000690000-0x0000000000696000-memory.dmp

    Filesize

    24KB

  • memory/4736-17-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB