Analysis

  • max time kernel
    142s
  • max time network
    150s
  • 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 14:46

General

  • Target

    2024-02-14_7bf34ed2808d9f201436637ab97f3064_cryptolocker.exe

  • Size

    67KB

  • MD5

    7bf34ed2808d9f201436637ab97f3064

  • SHA1

    455e69c0ce2c9b78ae9ba2f87e8b866045ecdcf9

  • SHA256

    22271e29ce737fc872fd244b2afc812c76418ae86e43bc77d3af3e132564744a

  • SHA512

    1c8cdfcba1bc712e3f8b27de64e17291bee4e6e2e00c3df4ea1d776c753adef38477ac1687c2eca5fd28aba5e92ac7d0826f9c4cc5b340bf07addce29f517c3a

  • SSDEEP

    768:vQz7yVEhs9+js1SQtOOtEvwDpjz9+4ZPsED3VK2+ZtyOjgO4r9vFAg2rq2g1B/Ru:vj+jsMQMOtEvwDpj5HZYTjipvF24VQ

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\2024-02-14_7bf34ed2808d9f201436637ab97f3064_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-14_7bf34ed2808d9f201436637ab97f3064_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1704
    • 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:4228

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    67KB

    MD5

    93dde5b083ae1ba5ea71d5519cc43b98

    SHA1

    39038bf1aede3fa9aeda336f375588e8b980ff8f

    SHA256

    fe9091f5998096c5e0aa0134704d0573e2004212a7497e1d3dae1e5360f7833a

    SHA512

    dd5a46a41523fb50b64053b80d8f4eea81df766d872acaac108421e6cd418475785674ddf2fe5fe636e0b374960b842c7a3db00bc95cf473b7095e47f7bc440d

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1704-0-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/1704-1-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/1704-2-0x0000000000810000-0x0000000000816000-memory.dmp

    Filesize

    24KB

  • memory/4228-18-0x0000000002070000-0x0000000002076000-memory.dmp

    Filesize

    24KB

  • memory/4228-17-0x0000000002050000-0x0000000002056000-memory.dmp

    Filesize

    24KB