Analysis

  • max time kernel
    78s
  • max time network
    140s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29-05-2024 15:31

General

  • Target

    2024-05-29_4e21ff461c9ad50ed41c110b8881f98f_cryptolocker.exe

  • Size

    38KB

  • MD5

    4e21ff461c9ad50ed41c110b8881f98f

  • SHA1

    b79e8609e35754233c71d89704ce1f2263a2eaa4

  • SHA256

    1904733c2d2c581c92b9fb6d1de8f830fb518a70991ec86054f8f11f3d46ba0e

  • SHA512

    70acf0da4434acbabb35a5aec31a7bb46854a6d80cd4f17b7fa91c01a1588e68f4edcbcb596946d8c2d468bd3f00046757068684580791ada84714c5513ac50b

  • SSDEEP

    768:fTz7y3lhsT+hs1SQtOOtEvwDpjfAu9+4C:fT+hsMQMOtEvwDpjoIHC

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\2024-05-29_4e21ff461c9ad50ed41c110b8881f98f_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-29_4e21ff461c9ad50ed41c110b8881f98f_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1592
    • 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:4168

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    38KB

    MD5

    481876e7c8f1e43589e5a26fba4671d4

    SHA1

    bf00a59e3ccd2f23717ce4f504b811a27bfbf479

    SHA256

    e5b543700b2fcd2d228cb6db0ab4ae02fd1ae317081101b72396ad66544a75db

    SHA512

    94ac8dd78abdf6b6c59d2e62c5e1bc6360c1a74c1036e2dc55359d1b4c75cbf7376866ede2b0028d171b37d857dc326256be184d166b525952b51cb06848c61f

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1592-0-0x0000000000620000-0x0000000000626000-memory.dmp

    Filesize

    24KB

  • memory/1592-1-0x0000000000760000-0x0000000000766000-memory.dmp

    Filesize

    24KB

  • memory/1592-8-0x0000000000620000-0x0000000000626000-memory.dmp

    Filesize

    24KB

  • memory/4168-17-0x00000000020F0000-0x00000000020F6000-memory.dmp

    Filesize

    24KB

  • memory/4168-23-0x00000000020D0000-0x00000000020D6000-memory.dmp

    Filesize

    24KB