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Analysis

  • max time kernel
    142s
  • 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
    29/05/2024, 19:29

General

  • Target

    2024-05-29_97a8c9bcaa8c15c6df8cbecca20ea3cd_cryptolocker.exe

  • Size

    68KB

  • MD5

    97a8c9bcaa8c15c6df8cbecca20ea3cd

  • SHA1

    eb65fb21f641573023448237dfe0ba54e12ef8b4

  • SHA256

    2c0c168eae9c7250b3a0e070f5e5e7cf993949857e5557bf88001e93d9eaf955

  • SHA512

    d9f19134a84f93b16948aac9b23d3e09b8fc7b66f558b192db5d4ee37bf81ad79815cfa2360a4004bc66834ba59d7384762fbf12e6d9f59b4c59cd1010a4deb6

  • SSDEEP

    1536:Tj+jsMQMOtEvwDpj5HmpJpOUHECgNMo0vp2l9tMPvdfGyePu7:TCjsIOtEvwDpj5HE/OUHnSMYy

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 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
  • 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\2024-05-29_97a8c9bcaa8c15c6df8cbecca20ea3cd_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-29_97a8c9bcaa8c15c6df8cbecca20ea3cd_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3932
    • 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:1204
  • 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=1412 --field-trial-handle=2676,i,447940133669489189,1353734109898858672,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:2772

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      68KB

      MD5

      cfb2c81aebdbb5cbbfbaeb635be8b5c3

      SHA1

      d5a701f8e7588d778132583c18b199faf71d9658

      SHA256

      aba343e23af4f79051396318f7b481fc99fa135a845c5304c4efe8ba4608ae16

      SHA512

      d1b1aafaff80adf942a9a0fdf4da851ebb7178737bc4485d4c9f6dcdd61eac2fc2f5533f80c42132a1793de08fd78bd9164dd13c94cdb5722358d1a1ff9ef0ed

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

      Filesize

      315B

      MD5

      a34ac19f4afae63adc5d2f7bc970c07f

      SHA1

      a82190fc530c265aa40a045c21770d967f4767b8

      SHA256

      d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

      SHA512

      42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

    • memory/1204-17-0x0000000000500000-0x000000000050E000-memory.dmp

      Filesize

      56KB

    • memory/1204-19-0x00000000004D0000-0x00000000004D6000-memory.dmp

      Filesize

      24KB

    • memory/1204-20-0x0000000002100000-0x0000000002106000-memory.dmp

      Filesize

      24KB

    • memory/1204-49-0x0000000000500000-0x000000000050E000-memory.dmp

      Filesize

      56KB

    • memory/3932-0-0x0000000000500000-0x000000000050E000-memory.dmp

      Filesize

      56KB

    • memory/3932-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

      Filesize

      24KB

    • memory/3932-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

      Filesize

      24KB

    • memory/3932-3-0x00000000021B0000-0x00000000021B6000-memory.dmp

      Filesize

      24KB

    • memory/3932-26-0x0000000000500000-0x000000000050E000-memory.dmp

      Filesize

      56KB