Overview

overview

10

Static

static

3

wang-yi-yun-003.exe

windows10-2004-x64

10

wang-yi-yun-003.exe

windows11-21h2-x64

10

Sharing

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General

  • Target
    wang-yi-yun-003.exe
  • Size 4.9MB
  • Sample260525-g32cssbw4n
  • SHA256 62bb24f5f1c68116d03a51d10686a3e08859241b49d8283dadb44034ae0c1108
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
donutloadervalleyrat_s2backdoorloader

Malware Config

Extracted

Family

  • valleyrat_s2

Version

  • 1.0

C2

  • 27.124.45.97:3390

  • 27.124.45.118:3391

  • 127.0.0.1:80

Attributes
  • campaign_date

    2026. 5.14

Targets

    • Target
      wang-yi-yun-003.exe
    • Size 4.9MB
    • SHA256 62bb24f5f1c68116d03a51d10686a3e08859241b49d8283dadb44034ae0c1108
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    backdoordonutloadervalleyrat_s2loader

    • Detects DonutLoader

      loader

    • Family: DonutLoader

      DonutLoader is a position-independent code that enables in-memory execution of VBScript, JScript, EXE, DLL files and dotNET assemblies.

      loaderdonutloader

    • Family: ValleyRat

      ValleyRat stage2 is a backdoor written in C++.

      backdoorvalleyrat_s2

    • Drops file in Drivers directory

    • Enumerates connected drives

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

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Tasks