Analysis

  • user interaction
    yes
  • max time kernel
    600s
  • max time network
    600s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-ja
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-jalocale:ja-jpos:windows10-2004-x64systemwindows
  • submitted
    04/08/2026, 18:27

General

  • Target
    -A2026804002105.zip
  • Size 4.0MB
  • Sample260804-w3tehsxdkf
  • SHA256 194845853f864088bc9fae5c0b2f692f6d6b1564f41111041247b3f86d356f30
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Family: valleyrat
  • Windows_Trojan_Winos_464b8a2e 5 IoCs
  • https://www.esentire.com/blog/winos4-0-online-module-staging-component-used-in-cleversoar-campaign 6 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Enumerates connected drives 3 TTPs 22 IoCs

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

  • Looks up external IP address via web service 1 TTPs 3 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Discovers running processes 1 TTPs 10 IoCs

    Running process information can be used to identify security tools or plan follow-on actions.

  • Executes a command shell one-liner 1 TTPs 3 IoCs

    Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

  • Program crash 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 37 IoCs

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

  • Delays execution with timeout.exe 10 IoCs
  • Kills process with taskkill 1 IoCs
  • Modifies registry class 10 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 51 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 35 IoCs

Processes

  • C:\Windows\Explorer.exe
    C:\Windows\Explorer.exe /idlist,,C:\Users\Admin\AppData\Local\Temp\-A2026804002105.zip
    1⤵
      PID:4648
    • C:\Windows\System32\rundll32.exe
      C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
      1⤵
        PID:3624
      • \??\E:\Vat.N0.20260804110703.EXE
        "E:\Vat.N0.20260804110703.EXE"
        1⤵
        • System Location Discovery: System Language Discovery
        • Modifies registry class
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:1920
        • C:\Windows\SysWOW64\cmd.exe
          /c C:\Windows\System32\ComputerDefaults.exe
          2⤵
          • Executes a command shell one-liner
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:1988
          • C:\Windows\SysWOW64\ComputerDefaults.exe
            C:\Windows\System32\ComputerDefaults.exe
            3⤵
            • Enumerates connected drives
            • System Location Discovery: System Language Discovery
            • Suspicious use of WriteProcessMemory
            PID:4156
            • C:\ProgramData\S-1-5-21-3543054753-178125582-54464056-2469\SystemAppData\MicrosoftEdgeComRegisterShellARM64.exe
              "MicrosoftEdgeComRegisterShellARM64.exe"
              4⤵
              • Executes dropped EXE
              • Loads dropped DLL
              • Enumerates connected drives
              • System Location Discovery: System Language Discovery
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of SetWindowsHookEx
              • Suspicious use of WriteProcessMemory
              PID:3896
              • C:\Windows\SysWOW64\taskkill.exe
                taskkill /f /im cmd.exe
                5⤵
                • System Location Discovery: System Language Discovery
                • Kills process with taskkill
                • Suspicious use of AdjustPrivilegeToken
                PID:1764
              • C:\Windows\SysWOW64\cmd.exe
                cmd.exe /c start "" /B cmd /C C:\Users\Admin\AppData\Local\Temp\8821E12759AD7B6395C.CMD
                5⤵
                • Executes a command shell one-liner
                • System Location Discovery: System Language Discovery
                • Suspicious use of WriteProcessMemory
                PID:568
                • C:\Windows\SysWOW64\cmd.exe
                  cmd /C C:\Users\Admin\AppData\Local\Temp\8821E12759AD7B6395C.CMD
                  6⤵
                  • Executes a command shell one-liner
                  • System Location Discovery: System Language Discovery
                  • Suspicious use of WriteProcessMemory
                  PID:2080
                  • C:\Windows\SysWOW64\tasklist.exe
                    TASKLIST /FI "IMAGENAME eq MicrosoftEdgeComRegisterShellARM64.exe" /FO CSV
                    7⤵
                    • Discovers running processes
                    • System Location Discovery: System Language Discovery
                    • Suspicious use of AdjustPrivilegeToken
                    PID:2912
                  • C:\Windows\SysWOW64\find.exe
                    FIND /I "MicrosoftEdgeComRegisterShellARM64.exe"
                    7⤵
                    • System Location Discovery: System Language Discovery
                    PID:4636
                  • C:\Windows\SysWOW64\timeout.exe
                    TIMEOUT /t 60 /nobreak
                    7⤵
                    • System Location Discovery: System Language Discovery
                    • Delays execution with timeout.exe
                    PID:4348
                  • C:\Windows\SysWOW64\tasklist.exe
                    TASKLIST /FI "IMAGENAME eq MicrosoftEdgeComRegisterShellARM64.exe" /FO CSV
                    7⤵
                    • Discovers running processes
                    • System Location Discovery: System Language Discovery
                    • Suspicious use of AdjustPrivilegeToken
                    PID:892
                  • C:\Windows\SysWOW64\find.exe
                    FIND /I "MicrosoftEdgeComRegisterShellARM64.exe"
                    7⤵
                    • System Location Discovery: System Language Discovery
                    PID:1152
                  • C:\Windows\SysWOW64\timeout.exe
                    TIMEOUT /t 60 /nobreak
                    7⤵
                    • System Location Discovery: System Language Discovery
                    • Delays execution with timeout.exe
                    PID:968
                  • C:\Windows\SysWOW64\tasklist.exe
                    TASKLIST /FI "IMAGENAME eq MicrosoftEdgeComRegisterShellARM64.exe" /FO CSV
                    7⤵
                    • Discovers running processes
                    • System Location Discovery: System Language Discovery
                    • Suspicious use of AdjustPrivilegeToken
                    PID:2004
                  • C:\Windows\SysWOW64\find.exe
                    FIND /I "MicrosoftEdgeComRegisterShellARM64.exe"
                    7⤵
                    • System Location Discovery: System Language Discovery
                    PID:3524
                  • C:\Windows\SysWOW64\timeout.exe
                    TIMEOUT /t 60 /nobreak
                    7⤵
                    • System Location Discovery: System Language Discovery
                    • Delays execution with timeout.exe
                    PID:2656
                  • C:\Windows\SysWOW64\tasklist.exe
                    TASKLIST /FI "IMAGENAME eq MicrosoftEdgeComRegisterShellARM64.exe" /FO CSV
                    7⤵
                    • Discovers running processes
                    • System Location Discovery: System Language Discovery
                    • Suspicious use of AdjustPrivilegeToken
                    PID:3028
                  • C:\Windows\SysWOW64\find.exe
                    FIND /I "MicrosoftEdgeComRegisterShellARM64.exe"
                    7⤵
                    • System Location Discovery: System Language Discovery
                    PID:4708
                  • C:\Windows\SysWOW64\timeout.exe
                    TIMEOUT /t 60 /nobreak
                    7⤵
                    • System Location Discovery: System Language Discovery
                    • Delays execution with timeout.exe
                    PID:2852
                  • C:\Windows\SysWOW64\tasklist.exe
                    TASKLIST /FI "IMAGENAME eq MicrosoftEdgeComRegisterShellARM64.exe" /FO CSV
                    7⤵
                    • Discovers running processes
                    • System Location Discovery: System Language Discovery
                    • Suspicious use of AdjustPrivilegeToken
                    PID:2484
                  • C:\Windows\SysWOW64\find.exe
                    FIND /I "MicrosoftEdgeComRegisterShellARM64.exe"
                    7⤵
                    • System Location Discovery: System Language Discovery
                    PID:2096
                  • C:\Windows\SysWOW64\timeout.exe
                    TIMEOUT /t 60 /nobreak
                    7⤵
                    • System Location Discovery: System Language Discovery
                    • Delays execution with timeout.exe
                    PID:4836
                  • C:\Windows\SysWOW64\tasklist.exe
                    TASKLIST /FI "IMAGENAME eq MicrosoftEdgeComRegisterShellARM64.exe" /FO CSV
                    7⤵
                    • Discovers running processes
                    • System Location Discovery: System Language Discovery
                    • Suspicious use of AdjustPrivilegeToken
                    PID:4796
                  • C:\Windows\SysWOW64\find.exe
                    FIND /I "MicrosoftEdgeComRegisterShellARM64.exe"
                    7⤵
                    • System Location Discovery: System Language Discovery
                    PID:752
                  • C:\Windows\SysWOW64\timeout.exe
                    TIMEOUT /t 60 /nobreak
                    7⤵
                    • System Location Discovery: System Language Discovery
                    • Delays execution with timeout.exe
                    PID:4396
                  • C:\Windows\SysWOW64\tasklist.exe
                    TASKLIST /FI "IMAGENAME eq MicrosoftEdgeComRegisterShellARM64.exe" /FO CSV
                    7⤵
                    • Discovers running processes
                    • System Location Discovery: System Language Discovery
                    • Suspicious use of AdjustPrivilegeToken
                    PID:4668
                  • C:\Windows\SysWOW64\find.exe
                    FIND /I "MicrosoftEdgeComRegisterShellARM64.exe"
                    7⤵
                    • System Location Discovery: System Language Discovery
                    PID:1028
                  • C:\Windows\SysWOW64\timeout.exe
                    TIMEOUT /t 60 /nobreak
                    7⤵
                    • System Location Discovery: System Language Discovery
                    • Delays execution with timeout.exe
                    PID:2904
                  • C:\Windows\SysWOW64\tasklist.exe
                    TASKLIST /FI "IMAGENAME eq MicrosoftEdgeComRegisterShellARM64.exe" /FO CSV
                    7⤵
                    • Discovers running processes
                    • System Location Discovery: System Language Discovery
                    • Suspicious use of AdjustPrivilegeToken
                    PID:4384
                  • C:\Windows\SysWOW64\find.exe
                    FIND /I "MicrosoftEdgeComRegisterShellARM64.exe"
                    7⤵
                    • System Location Discovery: System Language Discovery
                    PID:2996
                  • C:\Windows\SysWOW64\timeout.exe
                    TIMEOUT /t 60 /nobreak
                    7⤵
                    • System Location Discovery: System Language Discovery
                    • Delays execution with timeout.exe
                    PID:1948
                  • C:\Windows\SysWOW64\tasklist.exe
                    TASKLIST /FI "IMAGENAME eq MicrosoftEdgeComRegisterShellARM64.exe" /FO CSV
                    7⤵
                    • Discovers running processes
                    • System Location Discovery: System Language Discovery
                    • Suspicious use of AdjustPrivilegeToken
                    PID:1148
                  • C:\Windows\SysWOW64\find.exe
                    FIND /I "MicrosoftEdgeComRegisterShellARM64.exe"
                    7⤵
                    • System Location Discovery: System Language Discovery
                    PID:384
                  • C:\Windows\SysWOW64\timeout.exe
                    TIMEOUT /t 60 /nobreak
                    7⤵
                    • System Location Discovery: System Language Discovery
                    • Delays execution with timeout.exe
                    PID:3040
                  • C:\Windows\SysWOW64\tasklist.exe
                    TASKLIST /FI "IMAGENAME eq MicrosoftEdgeComRegisterShellARM64.exe" /FO CSV
                    7⤵
                    • Discovers running processes
                    • System Location Discovery: System Language Discovery
                    • Suspicious use of AdjustPrivilegeToken
                    PID:3788
                  • C:\Windows\SysWOW64\find.exe
                    FIND /I "MicrosoftEdgeComRegisterShellARM64.exe"
                    7⤵
                    • System Location Discovery: System Language Discovery
                    PID:2508
                  • C:\Windows\SysWOW64\timeout.exe
                    TIMEOUT /t 60 /nobreak
                    7⤵
                    • Delays execution with timeout.exe
                    PID:4480
      • C:\ProgramData\S-1-5-21-3543054753-178125582-54464056-2469\SystemAppData\MicrosoftEdgeComRegisterShellARM64.exe
        C:\ProgramData\S-1-5-21-3543054753-178125582-54464056-2469\SystemAppData\MicrosoftEdgeComRegisterShellARM64.exe
        1⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        PID:2316
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2316 -s 640
          2⤵
          • Program crash
          PID:4440
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2316 -ip 2316
        1⤵
          PID:4600

        Network

              MITRE ATT&CK Enterprise v16

              Replay Monitor

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              Downloads

              MicrosoftEdgeComRegisterShellARM64.exe

              • Path C:\ProgramData\S-1-5-21-3543054753-178125582-54464056-2469\SystemAppData\MicrosoftEdgeComRegisterShellARM64.exe
              • Size 3.5MB
              • SHA256 b869fbddbda07a9b4e511f533b4b7ac2a161cc88dae0519e0e55347c74db94a8
              • MD5 SHA1 SHA512 SSDEEP TLSH

              PDFCore8.dll

              • Path C:\ProgramData\S-1-5-21-3543054753-178125582-54464056-2469\SystemAppData\PDFCore8.dll
              • Size 3.8MB
              • SHA256 f856bcab6dc2d2c4a047202d301f23b6b9e9ffe5ef5c85b5431bff69442ae95f
              • MD5 SHA1 SHA512 SSDEEP TLSH

              0E0EA2CD61F757CEB5BB65FC2C758BF4_59B8C30534EA03831AD62B87D9D5F56A

              • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\0E0EA2CD61F757CEB5BB65FC2C758BF4_59B8C30534EA03831AD62B87D9D5F56A
              • Size 727B
              • SHA256 dc2b74355ccbf980b546d102d07f62ae3754965fde8bcb1c9532efefe23f6066
              • MD5 SHA1 SHA512 TLSH

              698460A0B6E60F2F602361424D832905_8BB23D43DE574E82F2BEE0DF0EC47EEB

              • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\698460A0B6E60F2F602361424D832905_8BB23D43DE574E82F2BEE0DF0EC47EEB
              • Size 471B
              • SHA256 be28306753fbcd10dfdccc0d803daf45cb9d8820d5d9f5ce83f7716d37584923
              • MD5 SHA1 SHA512 TLSH

              8EC9B1D0ABBD7F98B401D425828828CE_318C19735AFB8DB0BA822A0091F55D60

              • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8EC9B1D0ABBD7F98B401D425828828CE_318C19735AFB8DB0BA822A0091F55D60
              • Size 727B
              • SHA256 9ae2e1c28447bfe69ff169012d873d11a0c43001af635b114493e8177e7e9373
              • MD5 SHA1 SHA512 TLSH

              C8E534EE129F27D55460CE17FD628216_1130D9B25898B0DB0D4F04DC5B93F141

              • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\C8E534EE129F27D55460CE17FD628216_1130D9B25898B0DB0D4F04DC5B93F141
              • Size 727B
              • SHA256 895f3912ab7d818c60f98dfe7195fdcc1d1544a4eec908350eac31e7bf0fbcdc
              • MD5 SHA1 SHA512 TLSH

              C8E534EE129F27D55460CE17FD628216_64A201640BD8E31E72E33FB1EBF9962D

              • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\C8E534EE129F27D55460CE17FD628216_64A201640BD8E31E72E33FB1EBF9962D
              • Size 727B
              • SHA256 53c60c9910c857fa3f02c1db2a222d556998d9914fb472f4e3324b39be887813
              • MD5 SHA1 SHA512 TLSH

              0E0EA2CD61F757CEB5BB65FC2C758BF4_59B8C30534EA03831AD62B87D9D5F56A

              • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\0E0EA2CD61F757CEB5BB65FC2C758BF4_59B8C30534EA03831AD62B87D9D5F56A
              • Size 400B
              • SHA256 27e304bb82e83fcc51f8cd3789fd02b113fda127841cea148e86e0e54725e7a9
              • MD5 SHA1 SHA512 TLSH

              698460A0B6E60F2F602361424D832905_8BB23D43DE574E82F2BEE0DF0EC47EEB

              • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\698460A0B6E60F2F602361424D832905_8BB23D43DE574E82F2BEE0DF0EC47EEB
              • Size 400B
              • SHA256 bc56547c9dc8fffb1a2ac8c8271f6308385576ff66d222e4a9d867d7ec4dd032
              • MD5 SHA1 SHA512 TLSH

              8EC9B1D0ABBD7F98B401D425828828CE_318C19735AFB8DB0BA822A0091F55D60

              • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8EC9B1D0ABBD7F98B401D425828828CE_318C19735AFB8DB0BA822A0091F55D60
              • Size 404B
              • SHA256 e205f4d9120f9bee20c7a6401b57f6385ef57d812fcd660c4f0f3f2f12d76e28
              • MD5 SHA1 SHA512 TLSH

              C8E534EE129F27D55460CE17FD628216_1130D9B25898B0DB0D4F04DC5B93F141

              • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\C8E534EE129F27D55460CE17FD628216_1130D9B25898B0DB0D4F04DC5B93F141
              • Size 412B
              • SHA256 47db263be5f7a01814777518ebe6ff8495095c84f2c214783de64e9dce56b16d
              • MD5 SHA1 SHA512 TLSH

              C8E534EE129F27D55460CE17FD628216_64A201640BD8E31E72E33FB1EBF9962D

              • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\C8E534EE129F27D55460CE17FD628216_64A201640BD8E31E72E33FB1EBF9962D
              • Size 416B
              • SHA256 7d804e344ccb91ac7e0b62083605424abaf8801b90eb0b900a6514c7dc934689
              • MD5 SHA1 SHA512 TLSH

              8821E12759AD7B6395C.CMD

              • Path C:\Users\Admin\AppData\Local\Temp\8821E12759AD7B6395C.CMD
              • Size 1KB
              • SHA256 793ca9d76f158bb4ecb83c2e5c2038c54e674120d73de0397a0038be0f88e9f7
              • MD5 SHA1 SHA512 TLSH

              memory/3896-39-0x00000000040E0000-0x0000000004138000-memory.dmp

              memory/3896-40-0x00000000040E0000-0x0000000004138000-memory.dmp

              memory/3896-42-0x00000000040E0000-0x0000000004138000-memory.dmp

              memory/3896-43-0x00000000040E0000-0x0000000004138000-memory.dmp

              memory/3896-44-0x00000000040E0000-0x0000000004138000-memory.dmp