Analysis

  • max time kernel
    139s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23/01/2024, 22:30

General

  • Target

    2024-01-23_a28d276db56cfe6c175d322206a855fd_cryptolocker.exe

  • Size

    62KB

  • MD5

    a28d276db56cfe6c175d322206a855fd

  • SHA1

    11db30d79af231de557d0a14788a499f1a984b1c

  • SHA256

    0e5f4b50762ce7b1e1c0946528266cf9fdd528d627d74dc1e02094ed5d0a5ad1

  • SHA512

    25e5c3c80fdb0a8c86445d615f39dc16b9c647001df8efa36c351b8f1f1e63bca7da7be1d58abc9121f7624767bde752ccc68fc05a7229dfb895fa95944d0ee9

  • SSDEEP

    768:zQz7yVEhs9+syJP6ntOOtEvwDpjFelaB7yBEY9Su8F5mLZ5K7r:zj+soPSMOtEvwDpj4kpmeLmk

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\2024-01-23_a28d276db56cfe6c175d322206a855fd_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-23_a28d276db56cfe6c175d322206a855fd_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1428
    • 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:1376

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    63KB

    MD5

    a8e7a2d6eac22d9b9f204344f174c85c

    SHA1

    e4a9da1b7f31fbba4f171909f3883e01013595a0

    SHA256

    bea98a30b8e543281babc3565bd53ae9ca29796f454c13c574fc483e76ae8bb8

    SHA512

    bd6b21aeeaea435807ae7312409d13929c00eeb10e8cf0f2a86ef52de58bcd173c726b5c8a70cdce3723dfcf9daf0d51d1d8262b0747bc542d450f34f4e64251

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1376-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/1376-22-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB

  • memory/1376-20-0x00000000006D0000-0x00000000006D6000-memory.dmp

    Filesize

    24KB

  • memory/1376-47-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/1428-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/1428-1-0x0000000000560000-0x0000000000566000-memory.dmp

    Filesize

    24KB

  • memory/1428-2-0x0000000000560000-0x0000000000566000-memory.dmp

    Filesize

    24KB

  • memory/1428-3-0x0000000002070000-0x0000000002076000-memory.dmp

    Filesize

    24KB

  • memory/1428-16-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB