Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260130-en
  • resource tags

    arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    28/02/2026, 14:05

General

  • Target
    0B82B7C4AD21F54E62C93B8976E62726.exe
  • Size 2.1MB
  • Sample260228-rd2blsat4e
  • SHA256 d8ae95705379f6f0233c294d5d9d841ebccb6dae75736aadd0ff25d6d350b9ed
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • valleyrat_s2

Version
  • 1.0

C2
  • 108.187.43.3:1799

  • 108.187.43.3:443

  • 108.187.43.3:80

Attributes
  • campaign_date

    2026. 2.14

Signatures

  • Detect PurpleFox Rootkit 2 IoCs

    Detect PurpleFox Rootkit.

  • Detects DonutLoader 1 IoCs
  • Detects ValleyRAT payload 9 IoCs
  • DonutLoader

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

  • Donutloader family
  • Gh0st RAT payload 2 IoCs
  • Gh0strat

    Gh0st RAT is a remote access tool (RAT) with its source code public and it has been used by multiple Chinese groups.

  • Gh0strat family
  • PurpleFox

    PurpleFox is an exploit kit used to distribute other malware families and first seen in 2018.

  • Purplefox family
  • ValleyRat

    ValleyRat stage2 is a backdoor written in C++.

  • Valleyrat_s2 family
  • Drops file in Drivers directory 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Executes dropped EXE 5 IoCs
  • Enumerates connected drives 3 TTPs 44 IoCs

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

  • Drops file in System32 directory 2 IoCs
  • UPX packed file 2 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

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

  • System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

    Adversaries may check for Internet connectivity on compromised systems.

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies data under HKEY_USERS 5 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: LoadsDriver 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 22 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 7 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

  • Uses Volume Shadow Copy WMI provider

    The Volume Shadow Copy service is used to manage backups/snapshots.

  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Users\Admin\AppData\Local\Temp\0B82B7C4AD21F54E62C93B8976E62726.exe
    "C:\Users\Admin\AppData\Local\Temp\0B82B7C4AD21F54E62C93B8976E62726.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3308
    • C:\Windows\SYSTEM32\cmd.exe
      cmd.exe /c set
      2⤵
        PID:4784
      • C:\Users\Admin\AppData\Local\Temp\~5936898026983612624~\sg.tmp
        7zG_exe x "C:\Users\Admin\AppData\Local\Temp\0B82B7C4AD21F54E62C93B8976E62726.exe" -y -aoa -o"C:\Users\Admin\AppData\Local\Temp\~1188468161483801752"
        2⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:4308
      • C:\Users\Admin\AppData\Local\Temp\~1188468161483801752\Setup3221.exe
        "C:\Users\Admin\AppData\Local\Temp\~1188468161483801752\Setup3221.exe"
        2⤵
        • Executes dropped EXE
        • Drops file in System32 directory
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:3196
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /c ping -n 2 127.0.0.1 > nul && del C:\Users\Admin\AppData\Local\Temp\~11884~1\SETUP3~1.EXE > nul
          3⤵
          • System Location Discovery: System Language Discovery
          • System Network Configuration Discovery: Internet Connection Discovery
          • Suspicious use of WriteProcessMemory
          PID:2400
          • C:\Windows\SysWOW64\PING.EXE
            ping -n 2 127.0.0.1
            4⤵
            • System Location Discovery: System Language Discovery
            • System Network Configuration Discovery: Internet Connection Discovery
            • Runs ping.exe
            PID:3472
      • C:\Users\Admin\AppData\Local\Temp\~1188468161483801752\MA.exe
        "C:\Users\Admin\AppData\Local\Temp\~1188468161483801752\MA.exe"
        2⤵
        • Executes dropped EXE
        • Enumerates connected drives
        • Suspicious use of SetWindowsHookEx
        PID:3120
    • C:\Windows\SysWOW64\Gwogwo.exe
      C:\Windows\SysWOW64\Gwogwo.exe -auto
      1⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:956
      • C:\Windows\SysWOW64\Gwogwo.exe
        C:\Windows\SysWOW64\Gwogwo.exe -acsi
        2⤵
        • Drops file in Drivers directory
        • Sets service image path in registry
        • Executes dropped EXE
        • Enumerates connected drives
        • System Location Discovery: System Language Discovery
        • Checks processor information in registry
        • Modifies data under HKEY_USERS
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: LoadsDriver
        • Suspicious use of AdjustPrivilegeToken
        PID:2936

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          MA.exe

          • Path C:\Users\Admin\AppData\Local\Temp\~1188468161483801752\MA.exe
          • Size 446KB
          • SHA256 b3da593a7219b45deddd92b7b9ac337d311bbe16bbb38aef9a1d6160aa24d136
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Setup3221.exe

          • Path C:\Users\Admin\AppData\Local\Temp\~1188468161483801752\Setup3221.exe
          • Size 1.4MB
          • SHA256 84582ae3e4944b8697b498c8302ae5d334d18907bc198714b7d149ec5e88dec2
          • MD5 SHA1 SHA512 SSDEEP TLSH

          sg.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\~5936898026983612624~\sg.tmp
          • Size 715KB
          • SHA256 4cc32d00338fc7b206a7c052297acf9ac304ae7de9d61a2475a116959c1524fc
          • MD5 SHA1 SHA512 SSDEEP TLSH

          memory/956-23-0x0000000010000000-0x000000001019F000-memory.dmp

          memory/2936-60-0x0000000002E20000-0x0000000002EE1000-memory.dmp

          memory/3120-55-0x0000024B4C300000-0x0000024B4C35B000-memory.dmp

          memory/3120-56-0x0000024B4C300000-0x0000024B4C35B000-memory.dmp

          memory/3120-51-0x0000024B4A7F0000-0x0000024B4A819000-memory.dmp

          memory/3120-53-0x0000024B4C300000-0x0000024B4C35B000-memory.dmp

          memory/3120-52-0x0000024B4C300000-0x0000024B4C35B000-memory.dmp

          memory/3120-84-0x0000024B4C300000-0x0000024B4C35B000-memory.dmp

          memory/3120-54-0x0000024B4C300000-0x0000024B4C35B000-memory.dmp

          memory/3120-49-0x0000024B4A700000-0x0000024B4A729000-memory.dmp

          memory/3120-57-0x0000024B4C300000-0x0000024B4C35B000-memory.dmp

          memory/3120-83-0x0000024B4C300000-0x0000024B4C35B000-memory.dmp

          memory/3120-82-0x0000024B4C300000-0x0000024B4C35B000-memory.dmp

          memory/3196-14-0x0000000010000000-0x000000001019F000-memory.dmp

          memory/3308-65-0x0000000000B30000-0x0000000000BF1000-memory.dmp

          memory/3308-59-0x0000000000400000-0x0000000000569000-memory.dmp

          memory/3308-58-0x0000000000B30000-0x0000000000BF1000-memory.dmp

          memory/3308-0-0x0000000000400000-0x0000000000569000-memory.dmp