Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/04/2024, 19:30

General

  • Target

    2024-04-04_3a9d0a6080bcc349e2318dac6b2ced2f_cryptolocker.exe

  • Size

    127KB

  • MD5

    3a9d0a6080bcc349e2318dac6b2ced2f

  • SHA1

    a8eb6949381fae89ff2babca021bbcb0122c94e0

  • SHA256

    e8dda13bd542afa4f759f874aaef5e30d53903ade857459d32cfa7f6066eb3b5

  • SHA512

    8eb19e100c026d3d865a2ceb6c0543d2c8c1259536e76fd83bcab0b6dbd2e4406b2569631469ca0a4d74e3d85527e01dadb242bc1db537b5451867dacef8f276

  • SSDEEP

    1536:gUj+AIMOtEvwDpjNbwQEIPlemUhYwkkxGBpq:vCA9OtEvwDpjO

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\2024-04-04_3a9d0a6080bcc349e2318dac6b2ced2f_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-04_3a9d0a6080bcc349e2318dac6b2ced2f_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4324
    • 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:4600

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    127KB

    MD5

    93b54c00ff5ec572272ac1ee314f151a

    SHA1

    aa309fea0c75c884ae04cad5df2356ba35d48a1c

    SHA256

    a8163b5eb685efbf151280a8d624f8e4364fea262a0f6d700dcd010b6616e58e

    SHA512

    cbef48559c874be9bdf3997eb43de0e4d57432173e0d5cf947aca6c1d3ea4db0e22729f4bfe14f29ecd50b2216b51030f1134c62b1e136c27327c486c7e499f3

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/4324-0-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/4324-1-0x00000000021B0000-0x00000000021B6000-memory.dmp

    Filesize

    24KB

  • memory/4324-2-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/4600-17-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/4600-18-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB