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Analysis

  • max time kernel
    148s
  • max time network
    154s
  • 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, 19:02

General

  • Target

    2024-01-23_d9fd8fc693da7eddce1cce6b5f72b3d6_cryptolocker.exe

  • Size

    93KB

  • MD5

    d9fd8fc693da7eddce1cce6b5f72b3d6

  • SHA1

    714e4f9d6efcad152c0a3fddbfc10d4a42874779

  • SHA256

    030379cb0c88b8de439c03ff95bae7f8eb105258306b04e9087a802098749d57

  • SHA512

    af310ca0f21cec5bd495978ee92bca8760dabacc5fa003cf5bfbec0f85310c60cd3f21455e0ee133d82d2b0b920d3b3b14135252e87a4c9e1412299b78b0c4ac

  • SSDEEP

    1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp01Eq:AnBdOOtEvwDpj6z1

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 IoCs
  • UPX dump on OEP (original entry point) 4 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 IoCs
  • UPX packed file 4 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-01-23_d9fd8fc693da7eddce1cce6b5f72b3d6_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-23_d9fd8fc693da7eddce1cce6b5f72b3d6_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3044
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:748

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    93KB

    MD5

    53271335206eb423282c2f17f3f86256

    SHA1

    59e52d11cf892159511901f1e476250c223aa2f6

    SHA256

    de5dfc06be1b9f688adfecd38033c0c130a606367416bc1f5bb6b4ff90bb5d87

    SHA512

    37d42d5b48b8c882a7b1cba2b2e5b8e7a45ab5e3f8b3cdd4b29785c0ae993c528e96a4919978629c2f2910558eaa37ca1d90ebba1d00afd692c00af1854d17bc

  • memory/748-18-0x00000000005B0000-0x00000000005B6000-memory.dmp

    Filesize

    24KB

  • memory/748-19-0x00000000005D0000-0x00000000005D6000-memory.dmp

    Filesize

    24KB

  • memory/748-26-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/3044-0-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/3044-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB

  • memory/3044-2-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB

  • memory/3044-3-0x00000000006D0000-0x00000000006D6000-memory.dmp

    Filesize

    24KB

  • memory/3044-20-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB