Analysis

  • max time kernel
    141s
  • max time network
    124s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    09-05-2024 03:38

General

  • Target

    2024-05-09_62fa31af36d7ef2392f8220485492777_cryptolocker.exe

  • Size

    92KB

  • MD5

    62fa31af36d7ef2392f8220485492777

  • SHA1

    c929e681dc8cfdab465e61d0464e2b54ac3c0816

  • SHA256

    207de9c7d63fbf9cd03e81403b492b7eaced0edfe8c8f38cc42280b70a0a2633

  • SHA512

    d5844783ca530402898b7db280b90a94b4de689cf4b7719f1aa2fdeee352717d843756a9a872e8363474f0a5fe6d6d70cb11e9a38a0229e0d268d15c545c6db4

  • SSDEEP

    1536:zj+soPSMOtEvwDpj4ktBl01hJl8QAPM8Ho6cRDjhWF:zCsanOtEvwDpj1

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 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-09_62fa31af36d7ef2392f8220485492777_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-09_62fa31af36d7ef2392f8220485492777_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4684
    • 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:2008

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    92KB

    MD5

    c64448bc9e3e1d8f6b5847af68c840df

    SHA1

    d1857a1f2b8ed3b0739c7d875c4811417e2ac7dd

    SHA256

    67ef2ff7dcdd3b06e9add226d0b6157db45ddfd3b39aee26dfe1bedf9065f1c2

    SHA512

    4d365432a13bdc1ce50768023b73b0a251c660f4be48666fe7dace5177b6d6b67000124f1d3d5c752c4af966fb43cefce72d93ad15899ae45e408f5f45da2d39

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2008-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2008-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/2008-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/2008-51-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4684-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4684-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/4684-2-0x0000000000850000-0x0000000000856000-memory.dmp

    Filesize

    24KB

  • memory/4684-9-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/4684-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB