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Analysis

  • max time kernel
    142s
  • max time network
    165s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11/02/2024, 13:49

General

  • Target

    2024-02-11_effc4d415d809dd43996c25aa0aa295e_cryptolocker.exe

  • Size

    43KB

  • MD5

    effc4d415d809dd43996c25aa0aa295e

  • SHA1

    5429ab64a454d2cfc4324c9cad0af2d7547901b0

  • SHA256

    2cdb7785584eccf1f20644191964ee939a5b4d603a5ae661203ec969657479b5

  • SHA512

    6a0ba03946779ebb34d48b549aa57e3fedf0d715508f6a3b35d3939c0810f1a7ddddb304001e7ecddf358e6e4dd07278f70aa539a74005ea08dfbbb36918a07c

  • SSDEEP

    768:vQz7yVEhs9+js1SQtOOtEvwDpjz9+4REL+cc66nkpb1:vj+jsMQMOtEvwDpj5HW5IiB

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\2024-02-11_effc4d415d809dd43996c25aa0aa295e_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-11_effc4d415d809dd43996c25aa0aa295e_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2128
    • 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:380

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    43KB

    MD5

    fd35ca0f94cdb2a58b4b489059789c97

    SHA1

    1465431a3bb1ea75a5b113c0f298ffe61eb0b167

    SHA256

    4d8649436441af6c6045be9144f167382e3b6b647dc3d73ebc8e7ebb15e01804

    SHA512

    efc3de5222e3aba2aeee78b371032669d27be6a67be0fd2601baad419510974e2050808917dc1d77332d42800b6564b6a5ea0f7123ab0cf99333f919c47230ee

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/380-18-0x0000000002050000-0x0000000002056000-memory.dmp

    Filesize

    24KB

  • memory/380-17-0x00000000021D0000-0x00000000021D6000-memory.dmp

    Filesize

    24KB

  • memory/2128-0-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/2128-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/2128-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB