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Analysis

  • max time kernel
    128s
  • max time network
    135s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14/02/2024, 17:49

General

  • Target

    2024-02-14_f4b61ab806c390c97f95cd24833c7994_cryptolocker.exe

  • Size

    59KB

  • MD5

    f4b61ab806c390c97f95cd24833c7994

  • SHA1

    3a428f3745758d5e19b38bce02bc9a1a23c71667

  • SHA256

    7c64b4b8a1769aaa7ff6b9d36fda848bd76f412831d5d9dbb688a282673b276e

  • SHA512

    b2b945d561574240de96cb7b4475ae33f5baa98ee934a3c3a8ba721a16d172db51d982235f874f18a812c8e8b4a5b94ec119f14ceb8e0ecc50ec8087381db49c

  • SSDEEP

    1536:ZzFbxmLPWQMOtEvwDpj38lD/cMAT+l/N2:ZVxkGOtEvwDpjP

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 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\2024-02-14_f4b61ab806c390c97f95cd24833c7994_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-14_f4b61ab806c390c97f95cd24833c7994_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:5112
    • 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:3812

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    59KB

    MD5

    ffe62ebb608420c847e0b5fd09089cd0

    SHA1

    a96c0ae31ab041a91ecbf57fec3fa6b4396c12e5

    SHA256

    341112e680992d62a8c343e2a6ca658917385da9344837a5523c228a74c17858

    SHA512

    71d9bb9bf0d31602e605e1ca20867d5a54c0ddb58e938f9ad30fe4e8245acd502d460d2f952ceb325b08af9f22b9bb5b76160445f58c04209467f8bd8b38e1de

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/3812-17-0x0000000002100000-0x0000000002106000-memory.dmp

    Filesize

    24KB

  • memory/3812-19-0x0000000000740000-0x0000000000746000-memory.dmp

    Filesize

    24KB

  • memory/5112-0-0x0000000000560000-0x0000000000566000-memory.dmp

    Filesize

    24KB

  • memory/5112-1-0x0000000000560000-0x0000000000566000-memory.dmp

    Filesize

    24KB

  • memory/5112-2-0x0000000002230000-0x0000000002236000-memory.dmp

    Filesize

    24KB