Analysis

  • max time kernel
    150s
  • 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
    12/06/2024, 18:43

General

  • Target

    2024-06-12_b9ed6fd0642a149f0c9656564acd4ba8_cryptolocker.exe

  • Size

    81KB

  • MD5

    b9ed6fd0642a149f0c9656564acd4ba8

  • SHA1

    bb7f6502ed863c6870f8566146cc660cadf76c2c

  • SHA256

    c8edce37884bc1f858b8cbbdb1c84589ae098825a0921683a288a0b4eead90f4

  • SHA512

    091ff3f2f88dcd18bf261632542a9d278e865d6a5fb696470bd6b3b7bb1f95563af2b02fccc2a7a39d069d08bccc2c0b9654b5cc4de3a5547f40f9d33dc61251

  • SSDEEP

    1536:zj+soPSMOtEvwDpj4ktBl01hJ0tq1ky7QF:zCsanOtEvwDpjR

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 IoCs
  • UPX dump on OEP (original entry point) 4 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 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).

  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-06-12_b9ed6fd0642a149f0c9656564acd4ba8_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-12_b9ed6fd0642a149f0c9656564acd4ba8_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3244
    • C:\Users\Admin\AppData\Local\Temp\misid.exe
      "C:\Users\Admin\AppData\Local\Temp\misid.exe"
      2⤵
      • Executes dropped EXE
      PID:2452

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    81KB

    MD5

    8d96957115eef55d0d913f1d3468ae2f

    SHA1

    4967a7775283ebf16415a30090c8823df7fb8d71

    SHA256

    bc840d30275477115a405893af9512b080f5fa48eab5e26f20d512281b951aea

    SHA512

    a613099dbf744f59161f1907b7d856c2c5f88ddd8f01fa1062e611ab993daf972663bc3b13a103d7601cc2ee7b04dc9b4fbda927944be5998f7b580d6bb6183d

  • memory/2452-25-0x00000000005B0000-0x00000000005B6000-memory.dmp

    Filesize

    24KB

  • memory/2452-18-0x00000000005D0000-0x00000000005D6000-memory.dmp

    Filesize

    24KB

  • memory/2452-26-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3244-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3244-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB

  • memory/3244-9-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB

  • memory/3244-2-0x00000000006D0000-0x00000000006D6000-memory.dmp

    Filesize

    24KB

  • memory/3244-24-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB