Analysis

  • max time kernel
    139s
  • max time network
    157s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21/05/2024, 08:52

General

  • Target

    2024-05-21_fafcc7ae9f0de3846466d2d551250990_cryptolocker.exe

  • Size

    93KB

  • MD5

    fafcc7ae9f0de3846466d2d551250990

  • SHA1

    30c2842f2dd535496fef22713951ed540788ebec

  • SHA256

    e8f58d2f5f4ae5ad15b13220c0580b730b81cbe4d5dad24234aaa12560fa1808

  • SHA512

    5b36c5b1f2925082992fd9d7f48a01c43ea6bb027e8bb4885660b08d31babd71fd2e7c6f3d06a5c90af27d199c149c50130aee462b81d4861baed875668953a9

  • SSDEEP

    1536:zj+soPSMOtEvwDpj4ktBl01hJl8QAPM8Ho6cRDjhWpR1A:zCsanOtEvwDpj/2

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 6 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-21_fafcc7ae9f0de3846466d2d551250990_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-21_fafcc7ae9f0de3846466d2d551250990_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1448
    • 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:2528
  • 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=4440 --field-trial-handle=2248,i,10247514684337323751,15511974759131734137,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:3596

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      93KB

      MD5

      0babf83805f227d4ec6e5854eb0488a6

      SHA1

      ba0562c0df553688622d5bd35022c9e484b4207d

      SHA256

      9c6f6564fe2eae5ade086e2b233bb498ed6a226d7d9a824c5e6a2e2e4036f3ac

      SHA512

      691ec1d6688e54b755eb161ae0bc9d1648c5af88ce2505fede8da5f7aebad81f4f4452ec73a4353d85a4537fa7c6d161bb8c53cdf6402a54ca5ff73ab58e8c0b

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

      Filesize

      315B

      MD5

      a34ac19f4afae63adc5d2f7bc970c07f

      SHA1

      a82190fc530c265aa40a045c21770d967f4767b8

      SHA256

      d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

      SHA512

      42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

    • memory/1448-0-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/1448-1-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/1448-2-0x00000000006E0000-0x00000000006E6000-memory.dmp

      Filesize

      24KB

    • memory/1448-3-0x00000000006E0000-0x00000000006E6000-memory.dmp

      Filesize

      24KB

    • memory/1448-4-0x0000000002230000-0x0000000002236000-memory.dmp

      Filesize

      24KB

    • memory/1448-26-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/2528-19-0x00000000006B0000-0x00000000006B6000-memory.dmp

      Filesize

      24KB

    • memory/2528-20-0x00000000006D0000-0x00000000006D6000-memory.dmp

      Filesize

      24KB

    • memory/2528-27-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB