Analysis

  • max time kernel
    133s
  • 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
    24-05-2024 03:33

General

  • Target

    2024-05-24_30102a51a5c61b8593d906cd38258842_cryptolocker.exe

  • Size

    73KB

  • MD5

    30102a51a5c61b8593d906cd38258842

  • SHA1

    b03ec5db2db42892317434a9ce184a7f6462d1fc

  • SHA256

    c31d47f2a87ff37bbed99186e4c2c416ab3aab4bdc13d1ef6c8f0a66f1a078a8

  • SHA512

    ab35e9755a5d31a6381c97a6dafbd1c51bc4ba8f02aeb307c2ce805c69547a782f9b405c523371e308d0296449e229f00c5bd15614574f4db9d00aee96df00e1

  • SSDEEP

    1536:nj+4zs2cPVhlMOtEvwDpj4H8u8rZVTs9Vo:C4Q2c94OtEvwDpj4H8zT

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 10 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-24_30102a51a5c61b8593d906cd38258842_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-24_30102a51a5c61b8593d906cd38258842_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2832
    • 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:744
  • 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=3148,i,1697479186275492802,18058102846092193784,262144 --variations-seed-version --mojo-platform-channel-handle=4256 /prefetch:8
    1⤵
      PID:1504

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      73KB

      MD5

      33bfc6ca2217e54531fd516071afe6bb

      SHA1

      36d7d3ebbf28d096fbd8d799bb578102dc91db8d

      SHA256

      9d08726441e73347322e6386fa7f169d51152ddca4bc45ff547f047e401bf01f

      SHA512

      a51e6e0401e4c0d28455621f7ce927dd25996960e448f7658755e7f1dda3f3c05e66438e5b196e683183cb02baae5f4b5cc59d10851c512888345562b2546322

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

      Filesize

      315B

      MD5

      a34ac19f4afae63adc5d2f7bc970c07f

      SHA1

      a82190fc530c265aa40a045c21770d967f4767b8

      SHA256

      d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

      SHA512

      42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

    • memory/744-20-0x00000000021C0000-0x00000000021C6000-memory.dmp

      Filesize

      24KB

    • memory/744-21-0x00000000020D0000-0x00000000020D6000-memory.dmp

      Filesize

      24KB

    • memory/744-50-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/2832-0-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/2832-1-0x0000000000630000-0x0000000000636000-memory.dmp

      Filesize

      24KB

    • memory/2832-2-0x0000000000760000-0x0000000000766000-memory.dmp

      Filesize

      24KB

    • memory/2832-9-0x0000000000630000-0x0000000000636000-memory.dmp

      Filesize

      24KB

    • memory/2832-18-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB