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
    01/05/2024, 04:28

General

  • Target

    2024-05-01_8f05b3a69c575a15e37d8e65cc56d727_cryptolocker.exe

  • Size

    80KB

  • MD5

    8f05b3a69c575a15e37d8e65cc56d727

  • SHA1

    208854385ec103263a20da5dadd544ce2aa6c713

  • SHA256

    6034805b4a7193a55c3d374127f0f1986f76b43b3ac352c69677ccc64eacda3a

  • SHA512

    ef092aaa89729ad8de16932b05484d5facdc75287d880b2f7cf8ab2fcb08948b29c62c638dafac42602a62c47f829eefc04fe0fb07e7e5933fae4fc0669f204b

  • SSDEEP

    1536:zj+soPSMOtEvwDpj4ktBl01hJ0tq1ky7QM:zCsanOtEvwDpj4

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 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 6 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-01_8f05b3a69c575a15e37d8e65cc56d727_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-01_8f05b3a69c575a15e37d8e65cc56d727_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1596
    • 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:4716
  • 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=1340 --field-trial-handle=2236,i,5367110156796017614,12594004256180761011,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:3768

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      81KB

      MD5

      7724bcb25d0f2a46d7a079ce25aaf583

      SHA1

      75fa72e0c725aa3a2ef75ea7bde8fd8d56e0e84c

      SHA256

      d567e639c5740b47d86a75420ac968e2cc24da5fe5a65dc62e337a1cfe05bda8

      SHA512

      e5b21166ac8476bbf57e17fd94e5442a5e7a7313d628b77f8e9384d4ec88faa46fdfe4caf1a1177acb8e8335bc4b3999e0662f6ca9479ac6047dbf329380dc2f

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

      Filesize

      315B

      MD5

      a34ac19f4afae63adc5d2f7bc970c07f

      SHA1

      a82190fc530c265aa40a045c21770d967f4767b8

      SHA256

      d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

      SHA512

      42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

    • memory/1596-0-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/1596-1-0x0000000002140000-0x0000000002146000-memory.dmp

      Filesize

      24KB

    • memory/1596-2-0x0000000002140000-0x0000000002146000-memory.dmp

      Filesize

      24KB

    • memory/1596-3-0x0000000002040000-0x0000000002046000-memory.dmp

      Filesize

      24KB

    • memory/1596-25-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/4716-22-0x00000000004D0000-0x00000000004D6000-memory.dmp

      Filesize

      24KB

    • memory/4716-18-0x00000000004F0000-0x00000000004F6000-memory.dmp

      Filesize

      24KB

    • memory/4716-48-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB