Analysis

  • max time kernel
    76s
  • max time network
    140s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29-05-2024 06:39

General

  • Target

    2024-05-29_77bb61fad9866754ab20c57d1766e697_cryptolocker.exe

  • Size

    72KB

  • MD5

    77bb61fad9866754ab20c57d1766e697

  • SHA1

    e269c3ab445f89635d92bcdf3d73e570ae329072

  • SHA256

    959c23274eafae1cad721e1beecaee0fbc971d8fea4fe88199f040777242e332

  • SHA512

    9703c3b9b798646cae61333486ef7b845038deea29b6788458f906bac1327b85e824ca9236bbab6960fa8b11ff0a20d28b3ad00be200184ffc72ae798c3ce4c2

  • SSDEEP

    1536:nj+4zs2cPVhlMOtEvwDpj4H8u8rZVTs97x+:C4Q2c94OtEvwDpj4H8zZ

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 3 IoCs
  • UPX dump on OEP (original entry point) 5 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 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).

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

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-29_77bb61fad9866754ab20c57d1766e697_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-29_77bb61fad9866754ab20c57d1766e697_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3124
    • 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:2620

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    72KB

    MD5

    1b7d92dcee30e653e0f90233a0369b05

    SHA1

    6becf6802dbe492e56df87b07de03616d75ca16b

    SHA256

    5444a54aaf89503d01bf55f188a7eaf26d06d26be638c481ec64f8ea272ca6b2

    SHA512

    89704bb2edae9f6b4b6591461444953b2b59abbe66674589288b98e2cfd83efb5ed95aac6a87cc2423c6aea0f10033318aef7706fa6133bb9f761755f1196766

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2620-16-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2620-49-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3124-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB

  • memory/3124-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3124-2-0x00000000006D0000-0x00000000006D6000-memory.dmp

    Filesize

    24KB

  • memory/3124-9-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB

  • memory/3124-19-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB