Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05-03-2024 21:38

General

  • Target

    2024-03-05_76864cbe05394cb1b45defefed2a81d3_cryptolocker.exe

  • Size

    81KB

  • MD5

    76864cbe05394cb1b45defefed2a81d3

  • SHA1

    0033ae07efe092564874c7a75b33bbd84a744db9

  • SHA256

    f9fad7f286dd4fbd11ce2cd0fc14f70e917a5dccfd13d09cb8d52bf6290dca62

  • SHA512

    ebca1c70e9a219ace67e0c686f9f6e35196f001f931983151f591117ddf978179ee38839f86575e2085ee81f0c637ebf07a6147ee519430e1b32369c2aea639e

  • SSDEEP

    1536:Tj+jsMQMOtEvwDpj5HmpJpOUHECgNMo0vp2EMMAe/:TCjsIOtEvwDpj5HE/OUHnSMJ

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 5 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\2024-03-05_76864cbe05394cb1b45defefed2a81d3_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-05_76864cbe05394cb1b45defefed2a81d3_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3776
    • 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:2580

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    81KB

    MD5

    38478a2c0c7052042e12a407e506dd7e

    SHA1

    33357ff4dd6d74330c71bfee8a69d7803bcc7e17

    SHA256

    aa76affb8edf5fbd09cccf36d7c09761f214698d6b96e459087f15754b0e71c9

    SHA512

    d2f672773d5da8f2f04314d157cef435a7aa9daac4722af3312f641013df2d06f2a68e7f4d2b9b063f92a42994bd13eb1b00378b547d2040c58cdcfbb1d03121

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2580-18-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/2580-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/2580-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/2580-51-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/3776-0-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/3776-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB

  • memory/3776-2-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB

  • memory/3776-3-0x0000000002070000-0x0000000002076000-memory.dmp

    Filesize

    24KB

  • memory/3776-17-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB