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Analysis

  • max time kernel
    137s
  • max time network
    145s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23/01/2024, 20:22

General

  • Target

    2024-01-23_158424424e87f5d5fa9637808ea83d8d_cryptolocker.exe

  • Size

    59KB

  • MD5

    158424424e87f5d5fa9637808ea83d8d

  • SHA1

    79ea72129b2a10ef86b4e5a3b9409d00ade835a3

  • SHA256

    e12e6497d5705906d2fa99fc06f90367e1dd046ec9124e433a268ca8241e61d1

  • SHA512

    ea67380a5177f14d9fe31c1dc46aa9facc22134b0e92952d342d8367f8d7ea1efa96603bcf54ce87f958e877be4a8bd2f4a83751b016c86bac5820a47a198f76

  • SSDEEP

    1536:Tj+jsMQMOtEvwDpj5HmpJpOUHECgNMo0vp2EMs:TCjsIOtEvwDpj5HE/OUHnSMr

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\2024-01-23_158424424e87f5d5fa9637808ea83d8d_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-23_158424424e87f5d5fa9637808ea83d8d_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4788
    • 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:2964

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    59KB

    MD5

    c8102581e155fbf12c23f9e27e27deda

    SHA1

    8fed08cc5d1fa714ff9b93cdb7374ffe889ae486

    SHA256

    65702a45f93c730b9d819c969700519b6c545e2a766b706956ace4adced3c8c7

    SHA512

    780ff7f3871d02b92aced99ad4ec6cea83cec9bd7a81813e1c998bb267953269d879bd5ca51564e33766370932f99a0676fed681b7d5eb71ed281fde52c8e222

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2964-20-0x00000000006C0000-0x00000000006C6000-memory.dmp

    Filesize

    24KB

  • memory/2964-19-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/2964-22-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/2964-49-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/4788-0-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/4788-3-0x0000000000600000-0x0000000000606000-memory.dmp

    Filesize

    24KB

  • memory/4788-2-0x00000000005E0000-0x00000000005E6000-memory.dmp

    Filesize

    24KB

  • memory/4788-1-0x00000000005E0000-0x00000000005E6000-memory.dmp

    Filesize

    24KB

  • memory/4788-18-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB