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Analysis

  • max time kernel
    12s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    05/09/2024, 15:51

General

  • Target

    2024-09-05_a39af6887fe61eecee434985a79941e8_cryptolocker.exe

  • Size

    41KB

  • MD5

    a39af6887fe61eecee434985a79941e8

  • SHA1

    168adcfe5f4adeab9b75f8907319f6cad1e70d1d

  • SHA256

    54605d21ce4c018aa3d17738f84df84e3a2889680a3082023ef5748f2d49766b

  • SHA512

    bea1a2ef43311d55e796258cb981537182b92529f00768a42dea57db61aad34862bb16cc576bcdd60df5e6df471156439a8f4ad5eef35da94c098dae53cbe206

  • SSDEEP

    384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSzn1KkZCb9q8IujdxNX6vXzkm:b/yC4GyNM01GuQMNXw2PSj1Pqq8BOwm

Score
7/10

Malware Config

Signatures

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Creates a large amount of network flows 1 TTPs

    This may indicate a network scan to discover remotely running services.

  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious use of UnmapMainImage 2 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-09-05_a39af6887fe61eecee434985a79941e8_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-09-05_a39af6887fe61eecee434985a79941e8_cryptolocker.exe"
    1⤵
    • Loads dropped DLL
    • System Location Discovery: System Language Discovery
    • Suspicious use of UnmapMainImage
    • Suspicious use of WriteProcessMemory
    PID:2648
    • C:\Users\Admin\AppData\Local\Temp\retln.exe
      "C:\Users\Admin\AppData\Local\Temp\retln.exe"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of UnmapMainImage
      PID:2696

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • \Users\Admin\AppData\Local\Temp\retln.exe

    Filesize

    41KB

    MD5

    8af677a6fb785292a65f9302a491fc16

    SHA1

    666fb0e616d26abed7c79e2d0e56e9a9b16f3ff4

    SHA256

    396ae4e00d2b24ceb6304f154884e01d3d1625ff0f6994227ecef2cb0c26cb92

    SHA512

    54e6dd0ce612169f843a40cb8caecc85c923bff4c9e322394e8fea2a917b7c2ffa4a88ff4abe870569962c001535b66fc8fc2436bb90e8485c066af95887ac6e

  • memory/2648-0-0x0000000000280000-0x0000000000286000-memory.dmp

    Filesize

    24KB

  • memory/2648-1-0x0000000000280000-0x0000000000286000-memory.dmp

    Filesize

    24KB

  • memory/2648-2-0x0000000000400000-0x0000000000406000-memory.dmp

    Filesize

    24KB

  • memory/2696-23-0x0000000000390000-0x0000000000396000-memory.dmp

    Filesize

    24KB