Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22/05/2024, 02:40

General

  • Target

    2024-05-22_ef29eec03e194942892863a026a6f57d_cryptolocker.exe

  • Size

    79KB

  • MD5

    ef29eec03e194942892863a026a6f57d

  • SHA1

    89f7dfcd5a1b016aa36fa1af7c9617d5e0813ca3

  • SHA256

    fe4093e0e4d091043abcc46617d68d2cd983295d5c7c24b2b2eee1ca41b0a477

  • SHA512

    c947666bbd56ff01d4b3a3b40f1f3b158fe2a5b75cb19e0c746939bc3015812c96d7a973f43ed566c1f7907c0a002d591a7eca5decce47ecf8ccb1680f363571

  • SSDEEP

    1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdJcRk:T6a+rdOOtEvwDpjNtp

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\2024-05-22_ef29eec03e194942892863a026a6f57d_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-22_ef29eec03e194942892863a026a6f57d_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4196
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:4028

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    79KB

    MD5

    fc7908375b7bdbf9b5aa127c2e96c17e

    SHA1

    c4e4cb34f06d65d5569588565b636ff16c27dd22

    SHA256

    02990a969d694d621f582a804dd01a3635c69ba278b00857ac85c7b69ad47cdc

    SHA512

    c0255c0a3aef8355fda94c0a38e2acf5c567bea9c8027ec38ecb32b4f8a609fa868a2b69705d768482954a63753521e6ecf787f81533a110dd4d783d43b20e68

  • memory/4028-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4028-20-0x00000000005D0000-0x00000000005D6000-memory.dmp

    Filesize

    24KB

  • memory/4028-26-0x00000000005A0000-0x00000000005A6000-memory.dmp

    Filesize

    24KB

  • memory/4028-27-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4196-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4196-1-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/4196-2-0x00000000007D0000-0x00000000007D6000-memory.dmp

    Filesize

    24KB

  • memory/4196-9-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/4196-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB