Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27/05/2024, 12:11

General

  • Target

    2024-05-27_6584819104e2fceda94f06fa7ac7d556_cryptolocker.exe

  • Size

    52KB

  • MD5

    6584819104e2fceda94f06fa7ac7d556

  • SHA1

    69a258b2c1f9ab57bcfe0c08ff83d120ce9ad4f7

  • SHA256

    b21bc8fc04310760c0d5595516e1b80bdc402a0d15f1fd71b9869de65307d163

  • SHA512

    18ecf11899febafbe454e1266d9c2d0f4403a744a0c05073cf8a2183646425ca7d8614c19653789c172d02270c9d2074653c28de2f8138e88b46b386d815fac3

  • SSDEEP

    768:bODOw9UiamWUB2preAr+OfjH/0S16avdrQFiLjJvtOj:bODOw9acifAoc+v4

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • UPX dump on OEP (original entry point) 5 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 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).

  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-27_6584819104e2fceda94f06fa7ac7d556_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-27_6584819104e2fceda94f06fa7ac7d556_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1232
    • C:\Users\Admin\AppData\Local\Temp\lossy.exe
      "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
      2⤵
      • Executes dropped EXE
      PID:2792

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          52KB

          MD5

          707ccc6d7a4b65ba6e8a54c11836455b

          SHA1

          95b1622b3b743e92300a5e3cf5f89ea7f6e2d176

          SHA256

          ca0a52961524eef42a878c8fa067626aa0ae97cb8d3316f204639a571fe0a001

          SHA512

          b444b490cddd382e6edf4ba119244008c16dbc9a101049c82de5cc2a077885cd67cec991218daf924d9f69700dde858e24cd74217b2d2d4bd5f27a09b388386d

        • memory/1232-0-0x0000000008000000-0x000000000800F000-memory.dmp

          Filesize

          60KB

        • memory/1232-1-0x0000000000730000-0x0000000000736000-memory.dmp

          Filesize

          24KB

        • memory/1232-3-0x0000000000750000-0x0000000000756000-memory.dmp

          Filesize

          24KB

        • memory/1232-9-0x0000000000730000-0x0000000000736000-memory.dmp

          Filesize

          24KB

        • memory/1232-17-0x0000000008000000-0x000000000800F000-memory.dmp

          Filesize

          60KB

        • memory/2792-18-0x0000000008000000-0x000000000800F000-memory.dmp

          Filesize

          60KB

        • memory/2792-20-0x0000000000660000-0x0000000000666000-memory.dmp

          Filesize

          24KB

        • memory/2792-26-0x0000000000640000-0x0000000000646000-memory.dmp

          Filesize

          24KB

        • memory/2792-27-0x0000000008000000-0x000000000800F000-memory.dmp

          Filesize

          60KB