Analysis

  • max time kernel
    149s
  • 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
    28/03/2024, 11:57

General

  • Target

    2024-03-28_ec6f3573fef892399fb88ae74b8130d4_cryptolocker.exe

  • Size

    39KB

  • MD5

    ec6f3573fef892399fb88ae74b8130d4

  • SHA1

    5e0d5efd55679bcae512dffb9794a462ff3abdb1

  • SHA256

    c1af12c9d6832dfcf3a0e569064a8db6cef024bd81fc80e0a5c98534151c1ac3

  • SHA512

    1df15fe85cef05380f9be4af82554fdc57826e1c137e5d80d0921e2f60db7956e0e06b477a62a48158291faf8758c04fb65b64fa653bd6a03831e5092e1780b3

  • SSDEEP

    768:TS5nQJ24LR7tOOtEvwDpjGqPhqlcnvhx5/xFRjDX:m5nkFNMOtEvwDpjG8hhXdX

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 3 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\2024-03-28_ec6f3573fef892399fb88ae74b8130d4_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-28_ec6f3573fef892399fb88ae74b8130d4_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:4140

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    39KB

    MD5

    baffdd2c7676b0c3e2a15795f2de519f

    SHA1

    fb8a939c059f6cc2b5ae0fa0176328f2ca3d3df7

    SHA256

    2be24e8ac363970ed77ffbe471098efd723a36df1ecf063b857106c8c2f0e805

    SHA512

    5948fc5a78249d3da5cb387ada6290a4b844b282d182cf20083c99d6ed8fd9be194328e7d4dd56cb0069de3e071b605ab5ef1bf260b615fba3751c44f7c6a4fa

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/4140-17-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/4140-20-0x00000000005E0000-0x00000000005E6000-memory.dmp

    Filesize

    24KB

  • memory/4140-48-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/4560-0-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/4560-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/4560-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/4560-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/4560-18-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB