Overview

overview

10

Static

static

3

2026-03-13...op.exe

windows10-2004-x64

10

2026-03-13...op.exe

windows11-21h2-x64

10

Resubmissions

17/03/2026, 07:44

260317-jk6kxaex5p7

13/03/2026, 04:29

260313-e4l86ahs9z10

Sharing

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General

  • Target
    2026-03-13_558fcfa68b38c907313eefa4edc84908_elex_remcos_stop
  • Size 3.2MB
  • Sample260313-e4l86ahs9z
  • SHA256 e0278beeea0d2cf18d33b07a4807afe78dbd3f66769f02578009d1e0c281c999
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
valleyrat_s2backdoordiscoverypersistence

Malware Config

Extracted

Family

  • valleyrat_s2

Version

  • 1.0

C2

  • 156.247.41.101:6699

  • 127.0.0.1:80

Attributes
  • campaign_date

    2026. 3. 5

Targets

    • Target
      2026-03-13_558fcfa68b38c907313eefa4edc84908_elex_remcos_stop
    • Size 3.2MB
    • SHA256 e0278beeea0d2cf18d33b07a4807afe78dbd3f66769f02578009d1e0c281c999
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    backdoordiscoveryvalleyrat_s2persistence

    • Detects ValleyRAT payload

    • ValleyRat

      ValleyRat stage2 is a backdoor written in C++.

      backdoorvalleyrat_s2

    • Valleyrat_s2 family

      valleyrat_s2

    • Detected Nirsoft tools

      Free utilities often used by attackers which can steal passwords, product keys, etc.

    • Executes dropped EXE

    • Loads dropped DLL

    • Adds Run key to start application

      persistence

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

      discovery

    • Drops desktop.ini file(s)

    • Enumerates connected drives

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

    • Drops file in System32 directory

    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Tasks