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Analysis

  • max time kernel
    193s
  • max time network
    221s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18/01/2024, 23:30

General

  • Target

    2024-01-18_e7879af574ab7f40639b5957e49e1041_cryptolocker.exe

  • Size

    42KB

  • MD5

    e7879af574ab7f40639b5957e49e1041

  • SHA1

    e71a4dacdec57a475cefba38d94691122157cbda

  • SHA256

    8c5331fc1e5b9971da1545a4e1409bb95028760e748ed0bc3eecd2dfd36d9073

  • SHA512

    96899b116788b5b6e70e97ab0d9ec1d930d3d82fbe6d243a93cb07ab57b04964c9594e98f48c4a633dbc8ba64c74612009c3f88519a750d7f751796c41def257

  • SSDEEP

    768:vQz7yVEhs9+js1SQtOOtEvwDpjz9+4REL+cc66nkp6z:vj+jsMQMOtEvwDpj5HW5IiM

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 7 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-01-18_e7879af574ab7f40639b5957e49e1041_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-18_e7879af574ab7f40639b5957e49e1041_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:5004
    • 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:5040

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    42KB

    MD5

    625e082edaa8fafcbe78b984821843df

    SHA1

    ae1474a0b760000ecca20a1c4d25a31589cbbbd2

    SHA256

    ce8cdf196e038ca1db9447d01a1ff35266126833bfdc0092e1c4d6eb9142e39e

    SHA512

    7d3f0952d6a228d7bff6b55a7bc7b559eb6047283a160dbdcbb6e144633dfae8ec8997603af95d79ea0082945a9d59ecee90820491ca102c7f389764084ce508

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/5004-0-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/5004-1-0x0000000000820000-0x0000000000826000-memory.dmp

    Filesize

    24KB

  • memory/5004-2-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/5040-17-0x0000000001F50000-0x0000000001F56000-memory.dmp

    Filesize

    24KB

  • memory/5040-18-0x0000000001F80000-0x0000000001F86000-memory.dmp

    Filesize

    24KB