Analysis
- max time kernel
150s - max time network
152s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260617-en - resource tags
- submitted
27/06/2026, 04:04
General
- Target 39B698A4A2EC18E256B2AD8503DE9E4D.exe
- Size 1.8MB
- Sample260627-endbbagw91
- SHA256 59afd76ba4c60df30d59b1cd3db92f203040ed0d4e84279434bd702c919e9273
Malware Config
Extracted
-
valleyrat_s2
-
1.0
-
47.83.123.66:80
-
8.217.130.185:5677
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8.217.130.185:5678
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127.0.0.1:80
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campaign_date
2026. 5.30
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.
- Enumerates connected drives 3 TTPs 22 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
- 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.
- Inno Setup is an open-source installation builder for Windows applications. 2 IoCs
Inno Setup installer
- Checks processor information in registry 2 TTPs 3 IoCs
Processor information is often read in order to detect sandboxing environments.
- Enumerates system info in registry 2 TTPs 3 IoCs
- Modifies registry class 1 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: AddClipboardFormatListener 2 IoCs
- Suspicious behavior: EnumeratesProcesses 64 IoCs
- Suspicious use of FindShellTrayWindow 1 IoCs
- Suspicious use of SetWindowsHookEx 16 IoCs
- Suspicious use of WriteProcessMemory 5 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\39B698A4A2EC18E256B2AD8503DE9E4D.exe"C:\Users\Admin\AppData\Local\Temp\39B698A4A2EC18E256B2AD8503DE9E4D.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\is-3RE0O.tmp\39B698A4A2EC18E256B2AD8503DE9E4D.tmp"C:\Users\Admin\AppData\Local\Temp\is-3RE0O.tmp\39B698A4A2EC18E256B2AD8503DE9E4D.tmp" /SL5="$6007E,951165,819200,C:\Users\Admin\AppData\Local\Temp\39B698A4A2EC18E256B2AD8503DE9E4D.exe"2⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\fbbucgvfan\LockAppHost.exe"C:\Users\Admin\AppData\Local\fbbucgvfan\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
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C:\Windows\SysWOW64\schtasks.exeschtasks /create /f /tn "WindowsLockHost" /tr ""C:\Users\Admin\AppData\Local\fbbucgvfan\LockAppHost.exe"" /sc onlogon /rl highest4⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
-
-
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C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE"C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\fbbucgvfan\领英大纲.docx" /o ""3⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
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-
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C:\Users\Admin\AppData\Local\fbbucgvfan\LockAppHost.exeC:\Users\Admin\AppData\Local\fbbucgvfan\LockAppHost.exe1⤵
- Executes dropped EXE
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exeschtasks /create /f /tn "WindowsLockHost" /tr ""C:\Users\Admin\AppData\Local\fbbucgvfan\LockAppHost.exe"" /sc onlogon /rl highest2⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
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Network
MITRE ATT&CK Enterprise v16
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Replay Monitor
Loading Replay Monitor...
Downloads
gb.xsl
39B698A4A2EC18E256B2AD8503DE9E4D.tmp
LockAppHost.exe
LockHostingFramework.dll
msiexec.dll
wbem.dll
领英大纲.docx
CUSTOM.DIC
ExcludeDictionaryEN0409.lex
memory/2712-9-0x0000000005F00000-0x0000000006040000-memory.dmp
memory/2712-8-0x0000000005F00000-0x0000000006040000-memory.dmp
memory/2712-6-0x0000000003260000-0x0000000003261000-memory.dmp
memory/2712-38-0x0000000000140000-0x000000000049E000-memory.dmp
memory/3492-89-0x00000000048C0000-0x000000000491A000-memory.dmp
memory/3492-66-0x0000000002830000-0x000000000284C000-memory.dmp
memory/3492-30-0x00000000023B0000-0x00000000023B2000-memory.dmp
memory/3492-98-0x0000000002830000-0x000000000284C000-memory.dmp
memory/3492-97-0x0000000002830000-0x000000000284C000-memory.dmp
memory/3492-93-0x0000000073B30000-0x0000000073B72000-memory.dmp
memory/3492-92-0x00000000048C0000-0x000000000491A000-memory.dmp
memory/3492-91-0x00000000048C0000-0x000000000491A000-memory.dmp
memory/3492-52-0x00000000027E0000-0x00000000027FC000-memory.dmp
memory/3492-53-0x0000000002750000-0x00000000027D1000-memory.dmp
memory/3492-54-0x00000000027E0000-0x00000000027FC000-memory.dmp
memory/3492-55-0x00000000027E0000-0x00000000027FC000-memory.dmp
memory/3492-58-0x00000000027E0000-0x00000000027FC000-memory.dmp
memory/3492-60-0x0000000002FB0000-0x000000000300A000-memory.dmp
memory/3492-61-0x0000000002FB0000-0x000000000300A000-memory.dmp
memory/3492-63-0x0000000002FB0000-0x000000000300A000-memory.dmp
memory/3492-62-0x0000000002FB0000-0x000000000300A000-memory.dmp
memory/3492-64-0x0000000002FB0000-0x000000000300A000-memory.dmp
memory/3492-65-0x0000000002830000-0x000000000284C000-memory.dmp
memory/3492-90-0x00000000048C0000-0x000000000491A000-memory.dmp
memory/3492-67-0x0000000002830000-0x000000000284C000-memory.dmp
memory/3492-76-0x00000000027E0000-0x00000000027FC000-memory.dmp
memory/3492-75-0x00000000027E0000-0x00000000027FC000-memory.dmp
memory/3492-88-0x00000000048C0000-0x000000000491A000-memory.dmp
memory/3492-32-0x0000000002690000-0x0000000002692000-memory.dmp
memory/3492-87-0x0000000002830000-0x000000000284C000-memory.dmp
memory/5056-0-0x0000000000170000-0x0000000000246000-memory.dmp
memory/5056-39-0x0000000000170000-0x0000000000246000-memory.dmp
memory/5260-46-0x00007FFB88DE0000-0x00007FFB88DF0000-memory.dmp
memory/5260-48-0x00007FFB86840000-0x00007FFB86850000-memory.dmp
memory/5260-47-0x00007FFB86840000-0x00007FFB86850000-memory.dmp
memory/5260-41-0x00007FFB88DE0000-0x00007FFB88DF0000-memory.dmp
memory/5260-43-0x00007FFB88DE0000-0x00007FFB88DF0000-memory.dmp
memory/5260-45-0x00007FFB88DE0000-0x00007FFB88DF0000-memory.dmp
memory/5260-44-0x00007FFB88DE0000-0x00007FFB88DF0000-memory.dmp
memory/5260-555-0x00007FFB88DE0000-0x00007FFB88DF0000-memory.dmp
memory/5260-557-0x00007FFB88DE0000-0x00007FFB88DF0000-memory.dmp
memory/5260-556-0x00007FFB88DE0000-0x00007FFB88DF0000-memory.dmp
memory/5260-554-0x00007FFB88DE0000-0x00007FFB88DF0000-memory.dmp
memory/5692-94-0x0000000073B30000-0x0000000073B72000-memory.dmp