Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14/02/2024, 19:06

General

  • Target

    2024-02-14_bd5b0d788e769e0cdf84d3b6e09e505a_cryptolocker.exe

  • Size

    85KB

  • MD5

    bd5b0d788e769e0cdf84d3b6e09e505a

  • SHA1

    ad9263853843603136b3d1b3fde3932dc9984a57

  • SHA256

    984b8800a5687053c1eb547938d037a5a3564a234451da4fa9f978e1dd355ddc

  • SHA512

    70ce9502efcb3f6adce346bdaf9d9cb8090fc98757eea8153b09f3dda67b275d8a536394148468b6d2ef84c60ff6aa21fd462d67c48e5165cfcbb47741e1af68

  • SSDEEP

    768:qkmnjFom/kLyMro2GtOOtEvwDpjeY10Y/YMsvlMdwPK80GQuchoIgtIgj9:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgr

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 1 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).

  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-02-14_bd5b0d788e769e0cdf84d3b6e09e505a_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-14_bd5b0d788e769e0cdf84d3b6e09e505a_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:836
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:4248

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    85KB

    MD5

    472a8399a3bc04b8de2da6373ed4be91

    SHA1

    0758d3574bc933eee0c58742d7bce10d4666a9b6

    SHA256

    637354cc7a98cc9abbde64bccdffe59f0c3624c9dbaa4edc0827de246527473a

    SHA512

    610690a29f9b77274e4ee170ae07b0842624e000edcc2b9ce0938d461410eb445eee26a76309fd6537fd147a671f4e655e59b4db33b34e2046229fe7a2199a09

  • memory/836-0-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/836-1-0x00000000020D0000-0x00000000020D6000-memory.dmp

    Filesize

    24KB

  • memory/836-2-0x00000000020D0000-0x00000000020D6000-memory.dmp

    Filesize

    24KB

  • memory/836-3-0x0000000002100000-0x0000000002106000-memory.dmp

    Filesize

    24KB

  • memory/836-16-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4248-18-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4248-20-0x00000000007F0000-0x00000000007F6000-memory.dmp

    Filesize

    24KB

  • memory/4248-26-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/4248-27-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB