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Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28/02/2024, 20:54

General

  • Target

    2024-02-28_d9c5b06f4dcdc6fe536c383353d5e6ea_cryptolocker.exe

  • Size

    72KB

  • MD5

    d9c5b06f4dcdc6fe536c383353d5e6ea

  • SHA1

    4f277fcc2abfe74d4060acdf8e6904ab75f9abd0

  • SHA256

    2f5c6938420563035036cab78fcf84985caaec087418f1e7fb58ec2b799ee08c

  • SHA512

    51e6e26e80a0ad558bcdf808edc77ff4dd63b4e93b641c607825b4f530981427d9c12209a8daa8b4c920579fe62562722b3e6d7a4048782aa6846c568b4acd64

  • SSDEEP

    1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsal8t:1nK6a+qdOOtEvwDpjn

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 IoCs
  • UPX dump on OEP (original entry point) 4 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 IoCs
  • UPX packed file 4 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).

  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-02-28_d9c5b06f4dcdc6fe536c383353d5e6ea_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-28_d9c5b06f4dcdc6fe536c383353d5e6ea_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:952
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:2460

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    72KB

    MD5

    ea4ae3fd97b89a1229079e1fcd200853

    SHA1

    0676bdf7b126633b33abea48867cf9957a0cf618

    SHA256

    1b22837dc434179c20d1d9ab9c6e878adf4a7ed8671cac605d119a114a3153b8

    SHA512

    cc9b4c39708efd8fd17367b46e39d18470217085dc420aad389868060910398ba721851fff9081489844219286d61e988b9b00ef5e11378e4d193e7c90a542e6

  • memory/952-0-0x0000000000500000-0x000000000050F311-memory.dmp

    Filesize

    60KB

  • memory/952-1-0x00000000004C0000-0x00000000004C6000-memory.dmp

    Filesize

    24KB

  • memory/952-2-0x00000000004C0000-0x00000000004C6000-memory.dmp

    Filesize

    24KB

  • memory/952-3-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/952-18-0x0000000000500000-0x000000000050F311-memory.dmp

    Filesize

    60KB

  • memory/2460-19-0x00000000020E0000-0x00000000020E6000-memory.dmp

    Filesize

    24KB

  • memory/2460-22-0x0000000000690000-0x0000000000696000-memory.dmp

    Filesize

    24KB

  • memory/2460-26-0x0000000000500000-0x000000000050F311-memory.dmp

    Filesize

    60KB