Analysis

  • max time kernel
    89s
  • max time network
    123s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    12-02-2024 01:22

General

  • Target

    2024-02-12_06b1038ffdcbfce069462a8397ed0753_cryptolocker.exe

  • Size

    62KB

  • MD5

    06b1038ffdcbfce069462a8397ed0753

  • SHA1

    7a5c8efd9fda71644a3c1ca9bc447241c6e0604e

  • SHA256

    e36dd2785c069e545a7049167f562ce2651ffa7a6a0d954685f47d4d2afd985b

  • SHA512

    2c58d99cc62159ecfef44b634cbacfce190f14998ed2db241cc34c412609ef0d62f4f4cc4109f0a3e3384233b34e56eb300df11e21cfbf3776c0564132fbeeed

  • SSDEEP

    768:zQz7yVEhs9+syJP6ntOOtEvwDpjFelaB7yBEY9Su8F5mnVR:zj+soPSMOtEvwDpj4kpmeLmnr

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 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\2024-02-12_06b1038ffdcbfce069462a8397ed0753_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-12_06b1038ffdcbfce069462a8397ed0753_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3480
    • 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:2532

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    62KB

    MD5

    f7278d33ab198ae3cd19f77368e43be8

    SHA1

    4202527b08e26238b0b34e9d4424697fcc696d6d

    SHA256

    8b693969b209e3912bd9861b6c2a52c5af3433cd4ea417ff9a8641c83322e5b8

    SHA512

    ebf1449b92dfe714b10b2303209103db2334db2abee1587462265e5f586873956874cdef8e10623fef1792d1bfdaeb1e758aad78727db6c100619fc03837778f

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2532-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2532-48-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3480-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3480-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/3480-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/3480-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/3480-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB