Analysis

  • max time kernel
    145s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14-02-2024 14:30

General

  • Target

    2024-02-14_33884c982646e02fc651f27b6cd0c05c_cryptolocker.exe

  • Size

    89KB

  • MD5

    33884c982646e02fc651f27b6cd0c05c

  • SHA1

    c6f876cfce3fbe38c3d041dd29e97123b78a5a40

  • SHA256

    bc613235c8d0cda7dfa452d69548537d550e4d49abf328f46080dc3c45a64981

  • SHA512

    4604aa95728b272bf780f3fddc26343d539ded76e122a6c79f1c0be34dfb7c334f6b128301128fd3c693343aafb4b0a830922af4d4ed6205230e139fd175d25a

  • SSDEEP

    1536:zj+soPSMOtEvwDpj4ktBl01hJl8QAPM8Ho6cRDjhWT:zCsanOtEvwDpjD

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 5 IoCs
  • UPX dump on OEP (original entry point) 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
  • UPX packed file 5 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • 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\2024-02-14_33884c982646e02fc651f27b6cd0c05c_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-14_33884c982646e02fc651f27b6cd0c05c_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1624
    • 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:4568

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    90KB

    MD5

    14ea55bb7145317c7e27a07c765cb8df

    SHA1

    9767c95b70d80f9d9e673a45c0c17826a75a6280

    SHA256

    5bc29c7accdc8f533271f5cf48e12aca458ac166574ff04c5ee110688fc7a529

    SHA512

    5a82e460ba6d98e0265c519b56f8273e86424183ba2cca75da7d409b85565873cdb673eaf63ab4a64c1a23cc169cfa8f43a47e4f6dd6a19127cd2eef1fa80309

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1624-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/1624-1-0x00000000020D0000-0x00000000020D6000-memory.dmp

    Filesize

    24KB

  • memory/1624-2-0x00000000020D0000-0x00000000020D6000-memory.dmp

    Filesize

    24KB

  • memory/1624-3-0x00000000020F0000-0x00000000020F6000-memory.dmp

    Filesize

    24KB

  • memory/1624-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4568-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4568-20-0x0000000000820000-0x0000000000826000-memory.dmp

    Filesize

    24KB

  • memory/4568-22-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/4568-49-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB