Analysis

  • max time kernel
    140s
  • 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
    14/05/2024, 19:33

General

  • Target

    2024-05-14_640a5faa4726c713812985713b914c8a_cryptolocker.exe

  • Size

    71KB

  • MD5

    640a5faa4726c713812985713b914c8a

  • SHA1

    ccd4f65e6c455df0f257a3a770d957059768ade4

  • SHA256

    16a87cfd63f228e6be5d08b1c1813ecf778c1dcc033da1d4608acbc9210073c4

  • SHA512

    4538d9eb92ed235a200ed1e67d7bb1156875c5bf791907ad6756dfa756054ad4d64e1915d56283ab80480f7efe2c4083a4c5d7c1026e019390d14299240fffc5

  • SSDEEP

    1536:nj+4zs2cPVhlMOtEvwDpj4H8u8rZVTs9Mn:C4Q2c94OtEvwDpj4H8zH

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 2 IoCs
  • UPX dump on OEP (original entry point) 4 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 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).

  • Modifies system certificate store 2 TTPs 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-14_640a5faa4726c713812985713b914c8a_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-14_640a5faa4726c713812985713b914c8a_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2960
    • 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:4064
  • 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 --mojo-platform-channel-handle=4092 --field-trial-handle=2280,i,716736634476467098,11449718822158202904,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:4596

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      71KB

      MD5

      1e38fd594af9cd0daa7c69a56204935a

      SHA1

      24ed6346035a5679d862fdbfaf0a4cf77534703f

      SHA256

      16e582155465ea0c5fcc60c4090fe2955d80378a7984a1df6034c927ad688078

      SHA512

      c7626fbcf0b4000b484f7ce9dddd2289d136f6922eb21205d33c6adea7b7e95747a7173d19667598394ce87778d617cbf55485b81d2e5b512652d7a2ce9eb378

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

      Filesize

      315B

      MD5

      a34ac19f4afae63adc5d2f7bc970c07f

      SHA1

      a82190fc530c265aa40a045c21770d967f4767b8

      SHA256

      d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

      SHA512

      42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

    • memory/2960-0-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/2960-1-0x0000000002190000-0x0000000002196000-memory.dmp

      Filesize

      24KB

    • memory/2960-2-0x0000000002190000-0x0000000002196000-memory.dmp

      Filesize

      24KB

    • memory/2960-3-0x00000000021B0000-0x00000000021B6000-memory.dmp

      Filesize

      24KB

    • memory/2960-10-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/4064-21-0x00000000005B0000-0x00000000005B6000-memory.dmp

      Filesize

      24KB

    • memory/4064-19-0x00000000005D0000-0x00000000005D6000-memory.dmp

      Filesize

      24KB

    • memory/4064-50-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB