Analysis

  • max time kernel
    116s
  • max time network
    133s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28-01-2024 13:44

General

  • Target

    2024-01-28_8cfbc2bb39c4249f621b90d02ce47940_cryptolocker.exe

  • Size

    59KB

  • MD5

    8cfbc2bb39c4249f621b90d02ce47940

  • SHA1

    a58ae19e2b462f1ddefe05c6d01dc9e741195887

  • SHA256

    172e6e3b1e09fbf8396949de05409a8703e386d57a45c9a1e6543b7742e25189

  • SHA512

    d46b18cbcb184dd38d4fb8649c6a15d7be452333bec00a7c0587801db4aad85c8f996491136142ba7b3f44fcc172e35f3aabf60d4b904891bdcd47d410bbc6d7

  • SSDEEP

    1536:Tj+jsMQMOtEvwDpj5HmpJpOUHECgNMo0vp2EMTI1:TCjsIOtEvwDpj5HE/OUHnSML

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 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\2024-01-28_8cfbc2bb39c4249f621b90d02ce47940_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-28_8cfbc2bb39c4249f621b90d02ce47940_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2136
    • 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:560

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    60KB

    MD5

    a542188ff77ffe7ff3600bba3bf4f064

    SHA1

    43b4f9d0ce13b3d302104a6ace22c53168563d99

    SHA256

    b2f09174cab1a9d38a5cd36eebcb9a2d4cc333d98c3e8e150f2d7150d965e9f9

    SHA512

    88445f60ae44ba18e4388668dd5ca7f8358af3bbdb4f4a7694358f82917f9749f3b7094ee95a0dfb4cb29ee654ea76bc0e34066c3728abe306f3666173b49a76

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/560-18-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/560-20-0x0000000002000000-0x0000000002006000-memory.dmp

    Filesize

    24KB

  • memory/560-22-0x0000000000530000-0x0000000000536000-memory.dmp

    Filesize

    24KB

  • memory/560-49-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/2136-0-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/2136-1-0x0000000000540000-0x0000000000546000-memory.dmp

    Filesize

    24KB

  • memory/2136-2-0x0000000000540000-0x0000000000546000-memory.dmp

    Filesize

    24KB

  • memory/2136-3-0x0000000000560000-0x0000000000566000-memory.dmp

    Filesize

    24KB

  • memory/2136-17-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB