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Analysis

  • max time kernel
    88s
  • max time network
    124s
  • 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, 08:17

General

  • Target

    2024-02-14_e4755763dffe2e992ecbf7ddd7fb025a_cryptolocker.exe

  • Size

    55KB

  • MD5

    e4755763dffe2e992ecbf7ddd7fb025a

  • SHA1

    aa4a503731a3dd336f5d32e201770638ae9ca729

  • SHA256

    cc1e38c215cd308e6e713d1ad7d68da1761219999abb6d7347d7249cd6433367

  • SHA512

    b931198bd7df48bb75817dbc14f5f4a33a358dd6eb1f083309b86f612450ef26f8d9a109817b7c60311ee9f43dfc639c17905144804f49a775220bcd7ea183e4

  • SSDEEP

    768:6Qz7yVEhs9+4OR7tOOtEvwDpjLHqPOYRmNxt5QJz7Wwfep:6j+1NMOtEvwDpjr8oxEqp

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 5 IoCs
  • Detects executables built or packed with MPress PE compressor 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\2024-02-14_e4755763dffe2e992ecbf7ddd7fb025a_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-14_e4755763dffe2e992ecbf7ddd7fb025a_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4040
    • 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:4948

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    55KB

    MD5

    79f1ede8bb9f0065c24371a77e7bac26

    SHA1

    921049370b8ceb5255afdec8d9e881acc0f60431

    SHA256

    d3c79e9ecb892fb78960cf36bf43bcfb47995fa9df80bb3b2807377611b3a0ff

    SHA512

    63b515c3467f452d3a8cd2c50757e833e9380dbc9bcbd3060df1fb705e41aa017c2692c2c5a3b9b973981a6b8ec10ce4f4b851e55de3c66c9e42077e8801dbb2

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/4040-0-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4040-1-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/4040-2-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/4040-3-0x00000000007D0000-0x00000000007D6000-memory.dmp

    Filesize

    24KB

  • memory/4040-17-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4948-18-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4948-20-0x0000000002100000-0x0000000002106000-memory.dmp

    Filesize

    24KB

  • memory/4948-22-0x00000000020E0000-0x00000000020E6000-memory.dmp

    Filesize

    24KB

  • memory/4948-49-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB