Analysis

  • max time kernel
    142s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28-01-2024 05:33

General

  • Target

    2024-01-28_ace0cc0ec8039fbfc4b7a0dce9dc33da_cryptolocker.exe

  • Size

    37KB

  • MD5

    ace0cc0ec8039fbfc4b7a0dce9dc33da

  • SHA1

    3d0b78bca5d319bad9a4b7822e8bf398fa7c5320

  • SHA256

    22757cd2ec5f86a4478d5722821d85f7179a9b9b6ac360d45a3b8f21a00fb165

  • SHA512

    17e97757be1bffa987e571edf1feef3e382ae0678cec6f6114146af4c64b562e84e994da89c3ceabc3ea31985da4fd21daddd3fc3e53bac74425b9e19fa86681

  • SSDEEP

    768:XS5nQJ24LR1bytOOtEvwDpj66BLbjG9RvNI:i5nkFGMOtEvwDpjR+FI

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 2 IoCs
  • Detects executables built or packed with MPress PE compressor 4 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 10 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-01-28_ace0cc0ec8039fbfc4b7a0dce9dc33da_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-28_ace0cc0ec8039fbfc4b7a0dce9dc33da_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4560
    • 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:1624

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    37KB

    MD5

    96a0909d102ebfd4b0871ad7015f678b

    SHA1

    5827bd291c4b6d9cdefdd62a8bff11be71689230

    SHA256

    f1ad27f831c8af39fe39c03725ea6b8cf055ff87dd15aef6697eeadd12edb3bd

    SHA512

    8b4d7012de71669415980d0dfa9e592d6170c5e569885604a15f545e67dd50019731f3126a56f1b18205bfd2d5c86e28b9b183c1272de302ff99c4589dfdd715

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1624-21-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/1624-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/1624-48-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4560-0-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4560-1-0x00000000005E0000-0x00000000005E6000-memory.dmp

    Filesize

    24KB

  • memory/4560-2-0x00000000005E0000-0x00000000005E6000-memory.dmp

    Filesize

    24KB

  • memory/4560-3-0x0000000000600000-0x0000000000606000-memory.dmp

    Filesize

    24KB

  • memory/4560-17-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB