Analysis
- max time kernel
149s - max time network
148s - platform
windows10-2004_x64 - resource
win10v2004-20260513-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
-
campaign_date
2026. 5.30
Signatures
- Family: ValleyRat
ValleyRat stage2 is a backdoor written in C++.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- 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 10 IoCs
- Suspicious use of WriteProcessMemory 5 IoCs
Processes
-
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-83NSL.tmp\39B698A4A2EC18E256B2AD8503DE9E4D.tmp"C:\Users\Admin\AppData\Local\Temp\is-83NSL.tmp\39B698A4A2EC18E256B2AD8503DE9E4D.tmp" /SL5="$50196,951165,819200,C:\Users\Admin\AppData\Local\Temp\39B698A4A2EC18E256B2AD8503DE9E4D.exe"2⤵
- Checks computer location settings
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
-
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
-
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
fb3b0dbfee58fac8.customDestinations-ms
memory/3636-0-0x0000000000040000-0x0000000000116000-memory.dmp
memory/3636-40-0x0000000000040000-0x0000000000116000-memory.dmp
memory/4116-5-0x00000000032A0000-0x00000000032A1000-memory.dmp
memory/4116-7-0x0000000003450000-0x0000000003590000-memory.dmp
memory/4116-8-0x0000000003450000-0x0000000003590000-memory.dmp
memory/4116-37-0x00000000000F0000-0x000000000044E000-memory.dmp
memory/4240-92-0x0000000074410000-0x0000000074452000-memory.dmp
memory/4380-38-0x00007FFBE0C50000-0x00007FFBE0C60000-memory.dmp
memory/4380-41-0x00007FFBDE400000-0x00007FFBDE410000-memory.dmp
memory/4380-42-0x00007FFBDE400000-0x00007FFBDE410000-memory.dmp
memory/4380-35-0x00007FFBE0C50000-0x00007FFBE0C60000-memory.dmp
memory/4380-39-0x00007FFBE0C50000-0x00007FFBE0C60000-memory.dmp
memory/4380-36-0x00007FFBE0C50000-0x00007FFBE0C60000-memory.dmp
memory/4380-34-0x00007FFBE0C50000-0x00007FFBE0C60000-memory.dmp
memory/4908-51-0x0000000003160000-0x000000000317C000-memory.dmp
memory/4908-67-0x0000000003160000-0x000000000317C000-memory.dmp
memory/4908-54-0x0000000003180000-0x000000000319C000-memory.dmp
memory/4908-53-0x0000000003180000-0x000000000319C000-memory.dmp
memory/4908-56-0x0000000003160000-0x000000000317C000-memory.dmp
memory/4908-57-0x0000000003BC0000-0x0000000003C1A000-memory.dmp
memory/4908-58-0x0000000003BC0000-0x0000000003C1A000-memory.dmp
memory/4908-60-0x0000000003180000-0x000000000319C000-memory.dmp
memory/4908-61-0x0000000004820000-0x000000000487A000-memory.dmp
memory/4908-62-0x0000000004820000-0x000000000487A000-memory.dmp
memory/4908-63-0x0000000004820000-0x000000000487A000-memory.dmp
memory/4908-64-0x0000000004820000-0x000000000487A000-memory.dmp
memory/4908-66-0x0000000004820000-0x000000000487A000-memory.dmp
memory/4908-52-0x0000000003180000-0x000000000319C000-memory.dmp
memory/4908-68-0x0000000003160000-0x000000000317C000-memory.dmp
memory/4908-69-0x0000000003180000-0x000000000319C000-memory.dmp
memory/4908-70-0x0000000003180000-0x000000000319C000-memory.dmp
memory/4908-50-0x0000000003160000-0x000000000317C000-memory.dmp
memory/4908-48-0x0000000003040000-0x00000000030C1000-memory.dmp
memory/4908-86-0x0000000074410000-0x0000000074452000-memory.dmp
memory/4908-49-0x0000000003160000-0x000000000317C000-memory.dmp
memory/4908-30-0x0000000002DC0000-0x0000000002DC2000-memory.dmp
memory/4908-28-0x00000000015F0000-0x00000000015F2000-memory.dmp
memory/4908-227-0x0000000003BC0000-0x0000000003C1A000-memory.dmp
memory/4908-228-0x0000000003BC0000-0x0000000003C1A000-memory.dmp
memory/4908-229-0x0000000003BC0000-0x0000000003C1A000-memory.dmp