Analysis

  • max time kernel
    148s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-05-2024 16:44

General

  • Target

    2024-05-21_242a6dbd5c5ea4f815854b4f700fd884_cryptolocker.exe

  • Size

    39KB

  • MD5

    242a6dbd5c5ea4f815854b4f700fd884

  • SHA1

    bb935abc35a9e03a61231aa292e4c4ec1a91f40a

  • SHA256

    2a3ac6abe16384016a520b4f35eee1e4673be7ff8f389570e0aef76920f71428

  • SHA512

    cf35ee4d86f49a0a917e40ef47d34a029cbea11585d0ec538cb0db001e6b161d6cff0a052dbd885684b8ea16a5e2d7ff2a2af3bf29c6cbf17dcaafccdfc536aa

  • SSDEEP

    768:vQz7yVEhs9+js1SQtOOtEvwDpjz9+4/UkRYzMAZ+geslx:vj+jsMQMOtEvwDpj5HcSYPCEx

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Detection of Cryptolocker Samples 1 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 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-21_242a6dbd5c5ea4f815854b4f700fd884_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-21_242a6dbd5c5ea4f815854b4f700fd884_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2896
    • 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:5280

Network

MITRE ATT&CK Matrix ATT&CK v13

Defense Evasion

Subvert Trust Controls

1
T1553

Install Root Certificate

1
T1553.004

Modify Registry

1
T1112

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

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

    39KB

    MD5

    257984fac334d6924887e91181111538

    SHA1

    456f378d56bc6f4c801c80fd2b1f9b20f15f7552

    SHA256

    e1b783cab241467e6c92d83b8fb60a34c34c7bda26dc5c4b01354bd70f899a2b

    SHA512

    5b5c9bedb2ac15ecc09020b964804889fd918b11d88ce252e784b5db65a5aa7eab5d93050e5524d5eb297de30f8bbbd7bbd6e4eda8872646e571c0344f32509e

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

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2896-0-0x00000000005A0000-0x00000000005A6000-memory.dmp
    Filesize

    24KB

  • memory/2896-1-0x00000000005C0000-0x00000000005C6000-memory.dmp
    Filesize

    24KB

  • memory/2896-8-0x00000000005A0000-0x00000000005A6000-memory.dmp
    Filesize

    24KB

  • memory/5280-17-0x00000000004F0000-0x00000000004F6000-memory.dmp
    Filesize

    24KB

  • memory/5280-23-0x00000000004D0000-0x00000000004D6000-memory.dmp
    Filesize

    24KB