Analysis

  • max time kernel
    135s
  • max time network
    128s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-05-2024 16:04

General

  • Target

    2024-05-21_e42b1c425c87db2e06689b7026e2f399_cryptolocker.exe

  • Size

    40KB

  • MD5

    e42b1c425c87db2e06689b7026e2f399

  • SHA1

    8dab52cc25e5b8296036644cc2a9e2fcab395c5d

  • SHA256

    062ce86ff2ae0d0a8b487e2df7c8c4128fd83ce48c666301c0c083af58fc4f36

  • SHA512

    025ac858aab9389924418351588cb1094690e89687877cf380e78e8124555ebbfeb19b3b500aad1651538a63f79fb5796a9d66bfbec4db52364eb4c22a411eac

  • SSDEEP

    768:UEEmoQDj/xnMp+yptndwe/PWQtOOtEvwDpjLeJAsKuDks:ZzFbxmLPWQMOtEvwDpjLeJAsKc/

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 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\2024-05-21_e42b1c425c87db2e06689b7026e2f399_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-21_e42b1c425c87db2e06689b7026e2f399_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:5348
    • 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:5132

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    40KB

    MD5

    02d0b80b78b742ace6dc4faa9890009d

    SHA1

    ad297edb92849680de2ab9593e54fa15b9f473ad

    SHA256

    70d0de2e6831b5c0f8648dd7a64d13316154afd02b492f3c8887e7f8108c9e26

    SHA512

    21b060307c73e66fb520c8b91d19bf2388a856fc6e5ac562c1445dfb613c755fecd50eb91aed3a88c9283bfcc90656820ec3d3b28e428ea97cb5794dae02aa45

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/5348-0-0x0000000000490000-0x0000000000493000-memory.dmp

    Filesize

    12KB

  • memory/5348-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/5348-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/5348-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/5348-17-0x0000000000490000-0x0000000000493000-memory.dmp

    Filesize

    12KB