Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24-05-2024 01:31

General

  • Target

    2024-05-24_72ff99c7f26fb0b4d3e9554f21c09923_cryptolocker.exe

  • Size

    66KB

  • MD5

    72ff99c7f26fb0b4d3e9554f21c09923

  • SHA1

    9a546816ff32af366f707f3898073ea680f31802

  • SHA256

    b5435f266e1c84249202af139948f2dbf7766e1529259932de076bb48d09df46

  • SHA512

    e3561c1c447e2b411de69431c406790d32ee7ed5d07a04f3ce37e15f78c4b690369a7fc9a6c7f96d0e318abe527d695ccb26a7967fb1c6b9437064cb4c06c49c

  • SSDEEP

    1536:Tj+jsMQMOtEvwDpj5HmpJpOUHECgNMo0vp2l9tMPvdfGyX:TCjsIOtEvwDpj5HE/OUHnSMYs

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 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
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Modifies system certificate store 2 TTPs 10 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-24_72ff99c7f26fb0b4d3e9554f21c09923_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-24_72ff99c7f26fb0b4d3e9554f21c09923_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4724
    • 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:1428

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    67KB

    MD5

    2060a9d9a9316feab400640039484bf0

    SHA1

    321d76b5973551b5de82ce020fd6c856435a5ed9

    SHA256

    f3cf0398e284ee31be614a2e459abef35a2c848a406d0cb20c1d1094a457b510

    SHA512

    bf486f01dcd8faf9e526dbcb36309c02ae988cad03e7467b870f4c030ddd5240fa0376f5670c2bdef16d2b48f6acefafff7096b564ee5d72966a8cf5144d2769

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1428-17-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/1428-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/1428-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/1428-49-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/4724-0-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/4724-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

    Filesize

    24KB

  • memory/4724-2-0x00000000020F0000-0x00000000020F6000-memory.dmp

    Filesize

    24KB

  • memory/4724-9-0x00000000005A0000-0x00000000005A6000-memory.dmp

    Filesize

    24KB

  • memory/4724-18-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB