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Analysis

  • max time kernel
    89s
  • max time network
    124s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27/01/2024, 03:47

General

  • Target

    2024-01-27_d1a42c1584e9d276db2932281e6f5d81_cryptolocker.exe

  • Size

    64KB

  • MD5

    d1a42c1584e9d276db2932281e6f5d81

  • SHA1

    b61bb31e7cd372e30eebfff846a9f976d364558f

  • SHA256

    f0c448a467ea908d41eb7b3253c1f515942e01e2527efd6b48b38d5f22db1cc3

  • SHA512

    476da466108b1c205cc81a7e70adc600923c18b71f5af3d772c5137212c3c8da1c48fc6866363d03d11305e0c4a4a5d523d014da0d79b9a2d6fc739dee398ed6

  • SSDEEP

    1536:vj+jsMQMOtEvwDpj5HyCyh7vtRJ4BqKb1knzhF:vCjsIOtEvwDpj5Hv0j

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\2024-01-27_d1a42c1584e9d276db2932281e6f5d81_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-27_d1a42c1584e9d276db2932281e6f5d81_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2088
    • 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:5016

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    64KB

    MD5

    64f2f915cd760a91b25f5daa91514c50

    SHA1

    c9a6c6fe52a1a71127a10e79c26e0c9624c862bf

    SHA256

    c4e47c76caea1d0153c262ff62b6b1aea55c34457d4ba51245b45a037707fc64

    SHA512

    69bb1227bc3743e45021d7eb0d385e8c55fe4ab2b540d0e61d6eb5acb225d64c0558bd1144984e92cebaa622a4a98bbc96e79c66719d71e38fe237b807820ada

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2088-2-0x0000000000620000-0x0000000000626000-memory.dmp

    Filesize

    24KB

  • memory/2088-1-0x00000000005F0000-0x00000000005F6000-memory.dmp

    Filesize

    24KB

  • memory/2088-0-0x00000000005F0000-0x00000000005F6000-memory.dmp

    Filesize

    24KB

  • memory/5016-17-0x00000000007E0000-0x00000000007E6000-memory.dmp

    Filesize

    24KB

  • memory/5016-19-0x0000000000670000-0x0000000000676000-memory.dmp

    Filesize

    24KB