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Analysis

  • max time kernel
    90s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24/01/2024, 02:26

General

  • Target

    2024-01-24_35c949ca32f001bdc3df1fa4e35c4840_cryptolocker.exe

  • Size

    62KB

  • MD5

    35c949ca32f001bdc3df1fa4e35c4840

  • SHA1

    b152b64688ec0ffd9d6ffe3d98a8fc65381b6a5a

  • SHA256

    d6b92b76b964f2b1b2d134943e56b758966e891f59f73db3d143381e3ecedcfb

  • SHA512

    72b6995346be111ab248aa7de1ecd48e0fd01acef04ba89e9ebf4e5e6d757b36ddfdb420252deaf6636fabcf07c2551b2ae63310daf3cd28b4c0828fc4541080

  • SSDEEP

    768:zQz7yVEhs9+syJP6ntOOtEvwDpjFelaB7yBEY9Su8F5mnVwfXTT:zj+soPSMOtEvwDpj4kpmeLmnwTT

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 2 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).

  • Modifies system certificate store 2 TTPs 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-01-24_35c949ca32f001bdc3df1fa4e35c4840_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-24_35c949ca32f001bdc3df1fa4e35c4840_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3672
    • C:\Users\Admin\AppData\Local\Temp\misid.exe
      "C:\Users\Admin\AppData\Local\Temp\misid.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Modifies system certificate store
      PID:1852

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    63KB

    MD5

    7a847c21b139d1ad6d58f2710e43cd6c

    SHA1

    9cca7d7aba31ecb7f46edf5ff7dd72c12de3c644

    SHA256

    dfc729f5b55813ec7df09d087833903180c0d46b1dc996c1b1af19d3bfa48eab

    SHA512

    432aab9c2eff24e4e06ef6201a0fe83dd250ade4d3c0806e9dc358d29e2ccaa529224912e7e3ed07e808a6400d60e0af02cd0f844121fe2e2068ea62f44c9f39

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1852-19-0x00000000007D0000-0x00000000007D6000-memory.dmp

    Filesize

    24KB

  • memory/1852-21-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/1852-46-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3672-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3672-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB

  • memory/3672-2-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB

  • memory/3672-3-0x0000000002100000-0x0000000002106000-memory.dmp

    Filesize

    24KB

  • memory/3672-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB