Analysis

  • max time kernel
    137s
  • max time network
    162s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11/05/2024, 07:50

General

  • Target

    2024-05-11_a4dfa67abec795a1242ce344e14cf7bf_cryptolocker.exe

  • Size

    71KB

  • MD5

    a4dfa67abec795a1242ce344e14cf7bf

  • SHA1

    56edc4dca779f0f3fc363050e1e6ee661192bb00

  • SHA256

    b29e6a05b575cd178894135f23aae6fc1b7bc3d38e9ff7feec3204516fc2aaa1

  • SHA512

    8edcb3cfe1f5e7c50bd247880f240f841d01103d1da84a971264f17b374966d857e9e5b91ba509b9f2d067955654e0e3e56b665a526e5f3837d85947b561460f

  • SSDEEP

    1536:nj+4zs2cPVhlMOtEvwDpj4H8u8rZVTs9IOz:C4Q2c94OtEvwDpj4H8zA

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 3 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\2024-05-11_a4dfa67abec795a1242ce344e14cf7bf_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-11_a4dfa67abec795a1242ce344e14cf7bf_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4136
    • 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:4296
  • 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=1028 --field-trial-handle=2272,i,4858140932023865871,5726683989663339295,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:1468

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      71KB

      MD5

      b504d3ec0db5b53f6c27a2dcb59988b2

      SHA1

      0d0e7d29f20bfb2e892b686d4ba265706d9e8523

      SHA256

      ffc5e1a5684402ab7be950e3518b0a3ecf95ce77c4e049535870d6e1932a480b

      SHA512

      d0399dfcf8c5a222c77fad3d3036fa47ffcf0a5d378a973cbf6542ca913c5838fbc6cfd0f0cbcd3b13b705a188c92bacd00b612164616e5fc562e99b5ec3424e

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

      Filesize

      315B

      MD5

      a34ac19f4afae63adc5d2f7bc970c07f

      SHA1

      a82190fc530c265aa40a045c21770d967f4767b8

      SHA256

      d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

      SHA512

      42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

    • memory/4136-0-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/4136-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

      Filesize

      24KB

    • memory/4136-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

      Filesize

      24KB

    • memory/4136-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

      Filesize

      24KB

    • memory/4136-10-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/4296-20-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/4296-22-0x00000000020F0000-0x00000000020F6000-memory.dmp

      Filesize

      24KB

    • memory/4296-21-0x00000000007B0000-0x00000000007B6000-memory.dmp

      Filesize

      24KB

    • memory/4296-29-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB