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Analysis

  • max time kernel
    150s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    06/03/2024, 06:14

General

  • Target

    2024-03-06_91db5df5ae4740ea83a2f14492e88dea_cryptolocker.exe

  • Size

    126KB

  • MD5

    91db5df5ae4740ea83a2f14492e88dea

  • SHA1

    ba7816ba8779e2bf6ad2e29429c8cf32e2f6ccf0

  • SHA256

    76fa8b190bd4ddfe746536a19398c2a1602e23ce246cc5a40c9d9b759c0a318e

  • SHA512

    f92fd06847d4d72664928b9020bd3ad7c85c3c8397f6a8fe12e8a44038c65e1001af01350791a73e398f1a79a8c8dbbff7eb31df3ccdad5d408e086274541eb9

  • SSDEEP

    1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp699GNtL1eIEm:AnBdOOtEvwDpj6zE

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\2024-03-06_91db5df5ae4740ea83a2f14492e88dea_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-06_91db5df5ae4740ea83a2f14492e88dea_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4948
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:3956

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    127KB

    MD5

    4900b3fe801b127142ae87048efed919

    SHA1

    8e504d37dffec35d4efc5caec5c7de53d836e75c

    SHA256

    3c08906b441c8e356aab49de153591c33c2680cf8cc09957207154fe78707aef

    SHA512

    8d0bab2d76ba8cc23ad9f4545b5d10e4cdd6c9da9612d86b2726770cfda9a7e25aca0ebd0ec2cf789e4bada22aa3954788a796db82ffdfded774bd0de3760d34

  • memory/3956-18-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/3956-20-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/3956-26-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4948-0-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4948-1-0x0000000002150000-0x0000000002156000-memory.dmp

    Filesize

    24KB

  • memory/4948-2-0x0000000002150000-0x0000000002156000-memory.dmp

    Filesize

    24KB

  • memory/4948-3-0x0000000002070000-0x0000000002076000-memory.dmp

    Filesize

    24KB

  • memory/4948-19-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB