Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    04/08/2026, 21:46

General

  • Target
    B33A668328313F6843B1B8094BFAFFE3.exe
  • Size 4.1MB
  • Sample260804-1mnasahd35
  • SHA256 1d0b8f081975cc9dfb542c8da5d173c3a68a23531e83f07e86ccc706e56d76f3
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • valleyrat_s2

Version
  • 1.0

C2
  • 47.86.2.244:557

  • 47.86.2.244:558

  • 127.0.0.1:80

Attributes
  • campaign_date

    'Y#W726

Signatures

  • Family: ValleyRat

    ValleyRat stage2 is a backdoor written in C++.

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 2 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks installed software on the system 1 TTPs

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

  • Drops desktop.ini file(s) 7 IoCs
  • Enumerates connected drives 3 TTPs 64 IoCs

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

  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 8 IoCs

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

  • Inno Setup is an open-source installation builder for Windows applications. 2 IoCs

    Inno Setup installer

  • Modifies registry class 3 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 7 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\B33A668328313F6843B1B8094BFAFFE3.exe
    "C:\Users\Admin\AppData\Local\Temp\B33A668328313F6843B1B8094BFAFFE3.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1408
    • C:\Users\Admin\AppData\Local\Temp\is-VCFN2.tmp\B33A668328313F6843B1B8094BFAFFE3.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-VCFN2.tmp\B33A668328313F6843B1B8094BFAFFE3.tmp" /SL5="$400B2,3355742,856064,C:\Users\Admin\AppData\Local\Temp\B33A668328313F6843B1B8094BFAFFE3.exe"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Modifies registry class
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:5080
      • C:\Users\Admin\AppData\Local\1s0o22zn94\LockAppHost.exe
        "C:\Users\Admin\AppData\Local\1s0o22zn94\LockAppHost.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Adds Run key to start application
        • Enumerates connected drives
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:3816
        • C:\Windows\SysWOW64\schtasks.exe
          schtasks /create /f /tn "WindowsLockHost" /tr ""C:\Users\Admin\AppData\Local\1s0o22zn94\LockAppHost.exe"" /sc onlogon /rl highest
          4⤵
          • System Location Discovery: System Language Discovery
          • Scheduled Task/Job: Scheduled Task
          PID:5844
      • C:\Program Files (x86)\Windows Media Player\wmplayer.exe
        "C:\Program Files (x86)\Windows Media Player\wmplayer.exe" /prefetch:6 /Open "C:\Users\Admin\AppData\Local\1s0o22zn94\decoy_8537230515.mp4"
        3⤵
        • Drops desktop.ini file(s)
        • Enumerates connected drives
        • System Location Discovery: System Language Discovery
        • Modifies registry class
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of WriteProcessMemory
        PID:5304
        • C:\Windows\SysWOW64\unregmp2.exe
          "C:\Windows\System32\unregmp2.exe" /AsyncFirstLogon
          4⤵
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:572
          • C:\Windows\system32\unregmp2.exe
            "C:\Windows\SysNative\unregmp2.exe" /AsyncFirstLogon /REENTRANT
            5⤵
            • Enumerates connected drives
            • Suspicious use of AdjustPrivilegeToken
            PID:2604
  • C:\Users\Admin\AppData\Local\1s0o22zn94\LockAppHost.exe
    C:\Users\Admin\AppData\Local\1s0o22zn94\LockAppHost.exe
    1⤵
    • Executes dropped EXE
    • Loads dropped DLL
    • Enumerates connected drives
    • System Location Discovery: System Language Discovery
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1612
    • C:\Windows\SysWOW64\schtasks.exe
      schtasks /create /f /tn "WindowsLockHost" /tr ""C:\Users\Admin\AppData\Local\1s0o22zn94\LockAppHost.exe"" /sc onlogon /rl highest
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:5884
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k LocalServiceAndNoImpersonation -p -s upnphost
    1⤵
    • Drops file in Windows directory
    PID:4704

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        LockAppHost.exe

        • Path C:\Users\Admin\AppData\Local\1s0o22zn94\LockAppHost.exe
        • Size 74KB
        • SHA256 65e0de657a7bd32aaf53239edecc608b1bf08ea0a6cfed58894993c437b83b15
        • MD5 SHA1 SHA512 SSDEEP TLSH

        LockHostingFramework.dll

        • Path C:\Users\Admin\AppData\Local\1s0o22zn94\LockHostingFramework.dll
        • Size 236KB
        • SHA256 eb7b821d8201f6d4a2eabade84d8c42b2959a053543a24636db91c3cd2a53903
        • MD5 SHA1 SHA512 SSDEEP TLSH

        decoy_8537230515.mp4

        • Path C:\Users\Admin\AppData\Local\1s0o22zn94\decoy_8537230515.mp4
        • Size 2.0MB
        • SHA256 2d0c314b6cde73bbc078502db57ea5027df10d21e83cd5199f8a27ec545c69a1
        • MD5 SHA1 SHA512 SSDEEP TLSH

        msiexec.dll

        • Path C:\Users\Admin\AppData\Local\1s0o22zn94\msiexec.dll
        • Size 4KB
        • SHA256 053bb457d695fb3af6864a1fb7cafc9f6aa2e780872a6058a5234171ad6da3a2
        • MD5 SHA1 SHA512 SSDEEP TLSH

        wbem.dll

        • Path C:\Users\Admin\AppData\Local\1s0o22zn94\wbem.dll
        • Size 4KB
        • SHA256 ed72873639c4d756b3da17e9e6d2f7c9e9c27daca6d0e474ccdc3242b5958430
        • MD5 SHA1 SHA512 SSDEEP TLSH

        CurrentDatabase_400.wmdb

        • Path C:\Users\Admin\AppData\Local\Microsoft\Media Player\CurrentDatabase_400.wmdb
        • Size 1024KB
        • SHA256 fb54b902455c0514eadd4d9164d6a80d83f3e9e00d515c48692095c4c92c43c9
        • MD5 SHA1 SHA512 SSDEEP TLSH

        CurrentDatabase_400.wmdb

        • Path C:\Users\Admin\AppData\Local\Microsoft\Media Player\CurrentDatabase_400.wmdb
        • Size 384KB
        • SHA256 3f508c488624502aeea2cce22e6d9f05b64404915175018dc30b7cf255e73b24
        • MD5 SHA1 SHA512 SSDEEP TLSH

        LocalMLS_3.wmdb

        • Path C:\Users\Admin\AppData\Local\Microsoft\Media Player\LocalMLS_3.wmdb
        • Size 68KB
        • SHA256 7ee62e1924a5360e3504be16d380a92b237e4bd233584e3598184322f3275d94
        • MD5 SHA1 SHA512 SSDEEP TLSH

        WMSDKNS.XML.bak

        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows Media\12.0\WMSDKNS.XML.bak
        • Size 9KB
        • SHA256 cb87767c4a384c24e4a0f88455f59101b1ae7b4fb8de8a5adb4136c5f7ee545b
        • MD5 SHA1 SHA512 SSDEEP TLSH

        B33A668328313F6843B1B8094BFAFFE3.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\is-VCFN2.tmp\B33A668328313F6843B1B8094BFAFFE3.tmp
        • Size 3.3MB
        • SHA256 428e468a88ab32c81eee58edbdb4250b6bd3d619a7e82b9faa39cfe188d29357
        • MD5 SHA1 SHA512 SSDEEP TLSH

        wmsetup.log

        • Path C:\Users\Admin\AppData\Local\Temp\wmsetup.log
        • Size 1KB
        • SHA256 76d06df9445e86ed742c713abe97e4268c86c1e1d027513c3eadc0430df5f4d4
        • MD5 SHA1 SHA512 TLSH

        memory/1408-38-0x0000000000680000-0x000000000075F000-memory.dmp

        memory/1408-0-0x0000000000680000-0x000000000075F000-memory.dmp

        memory/1612-96-0x0000000002810000-0x000000000282C000-memory.dmp

        memory/1612-113-0x0000000073B10000-0x0000000073B52000-memory.dmp

        memory/1612-101-0x0000000002F80000-0x0000000002FDA000-memory.dmp

        memory/1612-100-0x0000000002F80000-0x0000000002FDA000-memory.dmp

        memory/1612-111-0x0000000002810000-0x000000000282C000-memory.dmp

        memory/1612-102-0x0000000002F80000-0x0000000002FDA000-memory.dmp

        memory/1612-110-0x0000000002810000-0x000000000282C000-memory.dmp

        memory/1612-97-0x0000000002F80000-0x0000000002FDA000-memory.dmp

        memory/1612-78-0x0000000002810000-0x000000000282C000-memory.dmp

        memory/1612-80-0x0000000002810000-0x000000000282C000-memory.dmp

        memory/1612-79-0x0000000002810000-0x000000000282C000-memory.dmp

        memory/1612-98-0x0000000002F80000-0x0000000002FDA000-memory.dmp

        memory/3816-76-0x0000000003020000-0x000000000303C000-memory.dmp

        memory/3816-112-0x0000000073B10000-0x0000000073B52000-memory.dmp

        memory/3816-108-0x0000000003020000-0x000000000303C000-memory.dmp

        memory/3816-89-0x0000000003020000-0x000000000303C000-memory.dmp

        memory/3816-91-0x00000000037A0000-0x00000000037FA000-memory.dmp

        memory/3816-92-0x00000000037A0000-0x00000000037FA000-memory.dmp

        memory/3816-93-0x00000000037A0000-0x00000000037FA000-memory.dmp

        memory/3816-94-0x00000000037A0000-0x00000000037FA000-memory.dmp

        memory/3816-109-0x0000000003020000-0x000000000303C000-memory.dmp

        memory/3816-30-0x0000000002E10000-0x0000000002E12000-memory.dmp

        memory/3816-77-0x0000000003020000-0x000000000303C000-memory.dmp

        memory/3816-99-0x00000000037A0000-0x00000000037FA000-memory.dmp

        memory/3816-63-0x0000000002F90000-0x0000000003011000-memory.dmp

        memory/3816-62-0x0000000003020000-0x000000000303C000-memory.dmp

        memory/3816-32-0x0000000002ED0000-0x0000000002ED2000-memory.dmp

        memory/5080-9-0x0000000004200000-0x0000000004340000-memory.dmp

        memory/5080-37-0x00000000008E0000-0x0000000000C47000-memory.dmp

        memory/5080-8-0x0000000004200000-0x0000000004340000-memory.dmp

        memory/5080-6-0x0000000003160000-0x0000000003161000-memory.dmp

        memory/5304-118-0x000000000A9E0000-0x000000000A9F0000-memory.dmp

        memory/5304-127-0x000000000A7A0000-0x000000000A7B0000-memory.dmp

        memory/5304-106-0x0000000006EA0000-0x0000000006EB0000-memory.dmp

        memory/5304-103-0x0000000006EA0000-0x0000000006EB0000-memory.dmp

        memory/5304-104-0x0000000006EA0000-0x0000000006EB0000-memory.dmp

        memory/5304-84-0x0000000006EA0000-0x0000000006EB0000-memory.dmp

        memory/5304-87-0x0000000006EA0000-0x0000000006EB0000-memory.dmp

        memory/5304-85-0x0000000006EA0000-0x0000000006EB0000-memory.dmp

        memory/5304-86-0x0000000006EA0000-0x0000000006EB0000-memory.dmp

        memory/5304-119-0x000000000A7A0000-0x000000000A7B0000-memory.dmp

        memory/5304-120-0x000000000A7A0000-0x000000000A7B0000-memory.dmp

        memory/5304-122-0x000000000A7A0000-0x000000000A7B0000-memory.dmp

        memory/5304-123-0x000000000A7A0000-0x000000000A7B0000-memory.dmp

        memory/5304-124-0x000000000A9E0000-0x000000000A9F0000-memory.dmp

        memory/5304-126-0x000000000A7A0000-0x000000000A7B0000-memory.dmp

        memory/5304-125-0x000000000A7A0000-0x000000000A7B0000-memory.dmp

        memory/5304-128-0x000000000A7A0000-0x000000000A7B0000-memory.dmp

        memory/5304-105-0x0000000006EA0000-0x0000000006EB0000-memory.dmp

        memory/5304-129-0x000000000A9E0000-0x000000000A9F0000-memory.dmp

        memory/5304-132-0x000000000A7A0000-0x000000000A7B0000-memory.dmp

        memory/5304-131-0x000000000A7A0000-0x000000000A7B0000-memory.dmp

        memory/5304-133-0x000000000A7A0000-0x000000000A7B0000-memory.dmp

        memory/5304-134-0x000000000A7A0000-0x000000000A7B0000-memory.dmp

        memory/5304-135-0x000000000A9E0000-0x000000000A9F0000-memory.dmp

        memory/5304-136-0x000000000A7A0000-0x000000000A7B0000-memory.dmp

        memory/5304-137-0x000000000A7A0000-0x000000000A7B0000-memory.dmp

        memory/5304-138-0x000000000A7A0000-0x000000000A7B0000-memory.dmp

        memory/5304-139-0x000000000A7A0000-0x000000000A7B0000-memory.dmp

        memory/5304-140-0x000000000A9E0000-0x000000000A9F0000-memory.dmp

        memory/5304-141-0x000000000A7A0000-0x000000000A7B0000-memory.dmp

        memory/5304-142-0x000000000A7A0000-0x000000000A7B0000-memory.dmp

        memory/5304-144-0x000000000A7A0000-0x000000000A7B0000-memory.dmp

        memory/5304-145-0x000000000A7A0000-0x000000000A7B0000-memory.dmp

        memory/5304-146-0x000000000A9E0000-0x000000000A9F0000-memory.dmp