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Analysis

  • max time kernel
    150s
  • 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
    18/03/2024, 18:24

General

  • Target

    2024-03-18_0861d64aebfd466278e5beacea816f85_cryptolocker.exe

  • Size

    63KB

  • MD5

    0861d64aebfd466278e5beacea816f85

  • SHA1

    8bee82115d614aa7e3668e8c42d875522600912e

  • SHA256

    f5aca8d29823777be0033e54bfebcfbceac064c3cc64bb237ab04ec5fdfa769e

  • SHA512

    3d9082f478f888be1701e87561eb9f53244fe6024633b9e2e1bfc23e1296577dffc247de82b44864ca3de1f72eaf2455d0e2b8b8c04ae7a7b085df3614cb49d0

  • SSDEEP

    1536:Tj+jsMQMOtEvwDpj5HmpJpOUHECgNMo0vp2l9tMPvBk:TCjsIOtEvwDpj5HE/OUHnSMYR

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\2024-03-18_0861d64aebfd466278e5beacea816f85_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-18_0861d64aebfd466278e5beacea816f85_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1276
    • 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:4940

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    63KB

    MD5

    7b685e5b01b14b00a3683e407457da4f

    SHA1

    421e206bdf33dc8686c2857ece2cf20a5b3ebdc9

    SHA256

    09857d680cd3216e338398fd0d6d5ed47bd4e946913d2ab39e2d2bc085f6a0ed

    SHA512

    b664ac7a7f487e9b5808f9808aae6e2bbbf607cac386452ee6ea706608d51a621301c36a440024be558375be1e0d66962326ba74151fbf948cf0f96d324e15de

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1276-0-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/1276-1-0x00000000020D0000-0x00000000020D6000-memory.dmp

    Filesize

    24KB

  • memory/1276-2-0x00000000020D0000-0x00000000020D6000-memory.dmp

    Filesize

    24KB

  • memory/1276-3-0x00000000020F0000-0x00000000020F6000-memory.dmp

    Filesize

    24KB

  • memory/1276-17-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/4940-18-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/4940-20-0x0000000000510000-0x0000000000516000-memory.dmp

    Filesize

    24KB

  • memory/4940-23-0x0000000000490000-0x0000000000496000-memory.dmp

    Filesize

    24KB

  • memory/4940-37-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB