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Analysis

  • max time kernel
    148s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01/06/2024, 15:51

General

  • Target

    2024-06-01_ed2b6e3c93dee7a901cbfb624f25f64e_cryptolocker.exe

  • Size

    91KB

  • MD5

    ed2b6e3c93dee7a901cbfb624f25f64e

  • SHA1

    818cd96cce825f0a80e9f7f6909ec3dab71aa01a

  • SHA256

    a61e5b86c643de908b0034e01fe2f2a96880cc37726e63e76ea8c3b0a8e4f16e

  • SHA512

    4d5742cf8cb4b1fefe8f6a0fc84f4a6c7b8d2de8b3ecb978b3ebbbfcab41658db5c66eeb759b6a9373ef6c69d2fd02a4389193815590ef6cc2c91e171ae71eb5

  • SSDEEP

    1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgIiY:AnBdOOtEvwDpj6zi

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\2024-06-01_ed2b6e3c93dee7a901cbfb624f25f64e_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-01_ed2b6e3c93dee7a901cbfb624f25f64e_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3100
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:1392

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    91KB

    MD5

    6f1f49575275014ca7cf067a2103ab4a

    SHA1

    34dd4c8244ec6732bf17370131acc768dafa0a97

    SHA256

    4a116ad39ef334212409951d17116c2d71a24fae0e255a5ab1b31bd94fe775f9

    SHA512

    592cc38e27ceaf81a60d7925718ff7150f1a08ff137d320c174decce29a9c83a0638ed56d9700c9fdbe75a39f7242a3bc86063802512622f7994f5036c713062

  • memory/1392-18-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/1392-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/1392-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/1392-27-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/3100-0-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/3100-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/3100-2-0x0000000000510000-0x0000000000516000-memory.dmp

    Filesize

    24KB

  • memory/3100-9-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/3100-17-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB