Overview

overview

10

Static

static

3

2025-05-27...uk.exe

windows10-2004-x64

10

2025-05-27...uk.exe

windows11-21h2-x64

10

Resubmissions

03/08/2026, 07:44

260803-jkt7waeb5510

27/05/2025, 13:11

250527-qfc65atxcv10

Sharing

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General

  • Target
    2025-05-27_4d5370f0310d9097f545ab21359dc88d_ryuk
  • Size 662KB
  • Sample250527-qfc65atxcv
  • SHA256 531e61e5376d7e7aff0a33752074fc1914039273545ddbeeb408866ad8889270
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
valleyrat_s2backdoorpersistence

Malware Config

Extracted

Family

  • valleyrat_s2

Version

  • 1.0

C2

  • 27.124.17.227:466

  • 27.124.17.229:445

  • 127.0.0.1:80

Attributes
  • campaign_date

    2025. 5.25

Targets

    • Target
      2025-05-27_4d5370f0310d9097f545ab21359dc88d_ryuk
    • Size 662KB
    • SHA256 531e61e5376d7e7aff0a33752074fc1914039273545ddbeeb408866ad8889270
    • MD5 SHA1 SHA512 SSDEEP
    Score
    10/10
    valleyrat_s2backdoorpersistence

    • ValleyRat

      ValleyRat stage2 is a backdoor written in C++.

      backdoorvalleyrat_s2

    • Valleyrat_s2 family

      valleyrat_s2

    • Adds Run key to start application

      persistence

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Tasks