Analysis

  • max time kernel
    143s
  • 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
    24-01-2024 11:35

General

  • Target

    2024-01-24_a794e4ef9117322f2ac9f7a689896478_cryptolocker.exe

  • Size

    123KB

  • MD5

    a794e4ef9117322f2ac9f7a689896478

  • SHA1

    45e4b26c1a492b1082ed5bc62f1e0cc4bd3cf07d

  • SHA256

    93455c9b5dca2def49078341e609c9ca37a822bafa1970bca5076d7b3a12d4ae

  • SHA512

    3be4290ba6b61e8f94b2231badd09816ce9ccca0df95f93d6893d0ffc524bf303b978b7df7edd903b3ec8871436dbad8c53032626849dfd2b3ebf2a9f5abe49f

  • SSDEEP

    1536:gUj+AIMOtEvwDpjNbwQEIPlemUhYwkkxE4qu:vCA9OtEvwDpjg

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Detection of Cryptolocker Samples 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\2024-01-24_a794e4ef9117322f2ac9f7a689896478_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-24_a794e4ef9117322f2ac9f7a689896478_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2332
    • 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:2308

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    123KB

    MD5

    051aee984222b9dcf685c90cc6f1c7d4

    SHA1

    49abc3cd6f8045f31e6c9774e05984420e136d3d

    SHA256

    01710cedfbd1e941045089062eee645a7da63b7a081e6c7b5ed9cafe136a299d

    SHA512

    a734ae1830dac02af68b4aceb2f1d13ad6160372388de43d6d814939946ccfda770476f3856bbc08c755a9189a39b6f6b3a5525ef756b64ff88bbd44285c9dd8

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2308-17-0x0000000002090000-0x0000000002096000-memory.dmp

    Filesize

    24KB

  • memory/2308-19-0x0000000002060000-0x0000000002066000-memory.dmp

    Filesize

    24KB

  • memory/2332-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB

  • memory/2332-0-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB

  • memory/2332-2-0x00000000006D0000-0x00000000006D6000-memory.dmp

    Filesize

    24KB