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Analysis

  • max time kernel
    141s
  • max time network
    126s
  • 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, 14:46

General

  • Target

    2024-05-09_81f294bec83d13ba4ddd822fb13e4e2e_cryptolocker.exe

  • Size

    72KB

  • MD5

    81f294bec83d13ba4ddd822fb13e4e2e

  • SHA1

    85de66107ab8a7e028e952aaa3d2e105fabf002f

  • SHA256

    47dd57afebbda0b8d76470d772db62d13619ccc0d197487a87e875bcaeb9da83

  • SHA512

    16e822443c10b74adfca4450626d9cc8625bc5741d5c15f0ecb4d71c8af9e2dac558f94101792b2324f732910e418afadf11630b4aab159c3c3c606f4ac2e0d5

  • SSDEEP

    1536:nj+4zs2cPVhlMOtEvwDpj4H8u8rZVTs97:C4Q2c94OtEvwDpj4H8z+

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 2 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 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-09_81f294bec83d13ba4ddd822fb13e4e2e_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-09_81f294bec83d13ba4ddd822fb13e4e2e_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:224
    • 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:2348

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    72KB

    MD5

    3d325eaddd8c38775bb2c883c7b52df8

    SHA1

    269801b565e213e438a020a22d9e995c2456b453

    SHA256

    d3db715a9adef72d9fe17becadf58803eeedcc3d95e3b59aeca81d8dc1fdd64e

    SHA512

    0afe07624314e3a5306496ba43b73a6b7eea700b0914b5a686eedd2e844e1997ea557916e062ae80ae7eb1d814029ae149164d35e5dc2b10551027381b089067

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/224-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/224-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/224-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/224-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/224-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2348-19-0x0000000000680000-0x0000000000686000-memory.dmp

    Filesize

    24KB

  • memory/2348-25-0x0000000000560000-0x0000000000566000-memory.dmp

    Filesize

    24KB

  • memory/2348-49-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB