Analysis

  • max time kernel
    93s
  • max time network
    124s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28/05/2024, 04:45

General

  • Target

    2024-05-28_27876b7ab5daf05be72f0d279095839a_cryptolocker.exe

  • Size

    38KB

  • MD5

    27876b7ab5daf05be72f0d279095839a

  • SHA1

    633a6bb6d124f31440d8e1f1410a45d7d0bb96c2

  • SHA256

    3f3e790d15a1d4d8de09b02b313f40692ca64f948a12eb5811f082e9ca88fb0f

  • SHA512

    2ecd6682e137d7bd6324aa3bc68cecc5245096aa74ce9753049ee5f038498ab81bd7c811fecb5e5ff07d18bd04cf3c15e6f41e69780b1e45d0e675b55f0b1427

  • SSDEEP

    768:fTz7y3lhsT+hs1SQtOOtEvwDpjfAu9+4qad:fT+hsMQMOtEvwDpjoIH/d

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Detection of Cryptolocker Samples 1 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 IoCs
  • 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\2024-05-28_27876b7ab5daf05be72f0d279095839a_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-28_27876b7ab5daf05be72f0d279095839a_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4296
    • 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:1040

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    38KB

    MD5

    f2e8c806a47c2ac1d544f68cca5b1eda

    SHA1

    e953d1859def22c62a1f987bfc1d4d39bf04775c

    SHA256

    bbb9837417e3ae434cb7b88b8e30bee86962b8910c8909b5b57927fd62caa524

    SHA512

    187e6635fe8f824d50641767a0d0efb20ada2d38a4b16cc6716a502b5fbca64216366f2327d43a856c56680da5ea144390cb49dc231ebe2e86d42673a43e0253

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1040-17-0x0000000000860000-0x0000000000866000-memory.dmp

    Filesize

    24KB

  • memory/1040-23-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/4296-0-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/4296-1-0x0000000000750000-0x0000000000756000-memory.dmp

    Filesize

    24KB

  • memory/4296-8-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB