Analysis

  • max time kernel
    125s
  • max time network
    126s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    12/05/2024, 10:51

General

  • Target

    2024-05-12_7281b6fbdb43808ddb7a9b53cbd03292_cryptolocker.exe

  • Size

    97KB

  • MD5

    7281b6fbdb43808ddb7a9b53cbd03292

  • SHA1

    1db628193d7e77ddae4fc4774f531ba61601893c

  • SHA256

    1dab9a7d9717b6d54b0c1414556fae1d329ab28c81946a616031a69579f9ecdc

  • SHA512

    f6af335dd57d793acbcd3f5f8a49ad45e301fcecbeb43fb6adcad64f7ecf1786b644be6ce3938cbd4235665347a636757d2f576ca757d7f43967888be41cbd64

  • SSDEEP

    1536:zj+soPSMOtEvwDpj4ktBl01hJl8QAPM8Ho6cRDjgx/bq1C:zCsanOtEvwDpjBJ

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\2024-05-12_7281b6fbdb43808ddb7a9b53cbd03292_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-12_7281b6fbdb43808ddb7a9b53cbd03292_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4020
    • 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:596
  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=4032,i,10373433614523925616,13586256558317053467,262144 --variations-seed-version --mojo-platform-channel-handle=4196 /prefetch:8
    1⤵
      PID:2020

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      97KB

      MD5

      944f8fcc0c134b74a3c019d6a9b14cd5

      SHA1

      68daec9115f3ed14fdf37d7b7e4e6f2a4b758118

      SHA256

      7c22cf3d160e48507dcfab3f1191bc2ee50a25df735c812a98c23e8ec25d2baa

      SHA512

      8daefda3f38be31a9cde7939fd27e32a38c0300eb28565f070d7285f62f1b5e19da045be955d883801623defd32f1052d4ad927942471a4a575b728f353dbca3

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

      Filesize

      315B

      MD5

      a34ac19f4afae63adc5d2f7bc970c07f

      SHA1

      a82190fc530c265aa40a045c21770d967f4767b8

      SHA256

      d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

      SHA512

      42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

    • memory/596-17-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/596-26-0x00007FF9581D0000-0x00007FF9583C5000-memory.dmp

      Filesize

      2.0MB

    • memory/596-20-0x0000000000650000-0x0000000000656000-memory.dmp

      Filesize

      24KB

    • memory/596-50-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/596-49-0x00007FF9581D0000-0x00007FF9583C5000-memory.dmp

      Filesize

      2.0MB

    • memory/4020-0-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/4020-1-0x00000000020D0000-0x00000000020D6000-memory.dmp

      Filesize

      24KB

    • memory/4020-2-0x0000000002110000-0x0000000002116000-memory.dmp

      Filesize

      24KB

    • memory/4020-9-0x00007FF9581D0000-0x00007FF9583C5000-memory.dmp

      Filesize

      2.0MB

    • memory/4020-18-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB