Analysis
- max time kernel
150s - max time network
142s - platform
windows10-2004_x64 - resource
win10v2004-20250619-en - resource tags
- submitted
22/07/2025, 19:20
General
- Target WPS_Setup_x64.exe
- Size 71.0MB
- Sample250722-x2jdlafm2x
- SHA256 8ec8f191124be5bc424cc9ea7f4ee9896791e0a9f0627c58a5cedf3bee18c389
Malware Config
Extracted
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valleyrat_s2
-
1.0
-
43.224.226.100:9090
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43.224.226.100:9091
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43.224.226.100:9092
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campaign_date
2025. 6. 8
Signatures
- ValleyRat
ValleyRat stage2 is a backdoor written in C++.
- Valleyrat_s2 family
- Blocklisted process makes network request 5 IoCs
- Executes dropped EXE 1 IoCs
- Loads dropped DLL 6 IoCs
- Enumerates connected drives 3 TTPs 22 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
- UPX packed file 6 IoCs
Detects executables packed with UPX/modified UPX open source packer.
- Drops file in Program Files 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 5 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Suspicious behavior: EnumeratesProcesses 64 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 17 IoCs
Processes
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C:\Windows\Explorer.EXEC:\Windows\Explorer.EXE1⤵
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C:\Users\Admin\AppData\Local\Temp\WPS_Setup_x64.exe"C:\Users\Admin\AppData\Local\Temp\WPS_Setup_x64.exe"2⤵
- Loads dropped DLL
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.execmd.exe /C power""sh""ell.exe -Executi""onPo""licy Bypa""ss -Comma""nd Ad""d-MpPre""ference -Exc""lusionPath C:\, D:\, E:\, F:\3⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exepower""sh""ell.exe -Executi""onPo""licy Bypa""ss -Comma""nd Ad""d-MpPre""ference -Exc""lusionPath C:\, D:\, E:\, F:\4⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Users\Admin\AppData\Local\chrmstp.exeC:\Users\Admin\AppData\Local\chrmstp.exe3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.execmd.exe /C "start rundll32.exe C:\Users\Admin\AppData\Roaming\TrustAsia\intel.dll,DllRegisterServer"3⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Roaming\TrustAsia\intel.dll,DllRegisterServer4⤵
- Blocklisted process makes network request
- Loads dropped DLL
- Enumerates connected drives
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
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-
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Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
Snegee.ini
__PSScriptPolicyTest_mfp5lepw.iqk.ps1
InstallOptions.dll
System.dll
ioSpecial.ini
ioSpecial.ini
ioSpecial.ini
nsExec.dll
chrmstp.exe
Config.json
intel.dll
memory/1564-247-0x0000000000400000-0x0000000000818000-memory.dmp
memory/1564-143-0x0000000000400000-0x0000000000818000-memory.dmp
memory/1564-0-0x0000000000400000-0x0000000000818000-memory.dmp
memory/1564-234-0x0000000000400000-0x0000000000818000-memory.dmp
memory/1564-124-0x0000000000400000-0x0000000000818000-memory.dmp
memory/1564-134-0x0000000000400000-0x0000000000818000-memory.dmp
memory/2496-138-0x0000000010000000-0x000000001001D000-memory.dmp
memory/2496-142-0x0000000010000000-0x000000001001D000-memory.dmp
memory/4716-105-0x0000000006BC0000-0x0000000006BF2000-memory.dmp
memory/4716-113-0x00000000052D0000-0x00000000052E0000-memory.dmp
memory/4716-120-0x0000000007FA0000-0x000000000861A000-memory.dmp
memory/4716-121-0x0000000007920000-0x000000000793A000-memory.dmp
memory/4716-122-0x0000000007980000-0x000000000798A000-memory.dmp
memory/4716-123-0x0000000007BB0000-0x0000000007C46000-memory.dmp
memory/4716-118-0x0000000006C30000-0x0000000006C4E000-memory.dmp
memory/4716-125-0x0000000007B20000-0x0000000007B31000-memory.dmp
memory/4716-126-0x0000000007B60000-0x0000000007B6E000-memory.dmp
memory/4716-127-0x0000000007B70000-0x0000000007B84000-memory.dmp
memory/4716-128-0x0000000007C50000-0x0000000007C6A000-memory.dmp
memory/4716-129-0x0000000007BA0000-0x0000000007BA8000-memory.dmp
memory/4716-112-0x00000000052D0000-0x00000000052E0000-memory.dmp
memory/4716-87-0x0000000002D00000-0x0000000002D36000-memory.dmp
memory/4716-106-0x0000000070430000-0x000000007047C000-memory.dmp
memory/4716-104-0x000000007F3C0000-0x000000007F3D0000-memory.dmp
memory/4716-103-0x0000000006640000-0x000000000668C000-memory.dmp
memory/4716-102-0x00000000065F0000-0x000000000660E000-memory.dmp
memory/4716-101-0x0000000006020000-0x0000000006374000-memory.dmp
memory/4716-91-0x0000000005FB0000-0x0000000006016000-memory.dmp
memory/4716-90-0x0000000005F40000-0x0000000005FA6000-memory.dmp
memory/4716-119-0x00000000075F0000-0x0000000007693000-memory.dmp
memory/4716-86-0x00000000052D0000-0x00000000052E0000-memory.dmp
memory/4716-89-0x0000000005640000-0x0000000005662000-memory.dmp
memory/4716-88-0x0000000005910000-0x0000000005F38000-memory.dmp
memory/5688-230-0x0000000010000000-0x000000001003A000-memory.dmp
memory/5688-229-0x0000000002CA0000-0x0000000002CD9000-memory.dmp
memory/5688-248-0x0000000010000000-0x000000001003A000-memory.dmp
memory/5688-251-0x0000000002D00000-0x0000000002D22000-memory.dmp
memory/5688-256-0x0000000002D00000-0x0000000002D22000-memory.dmp
memory/5688-257-0x0000000002D00000-0x0000000002D22000-memory.dmp
memory/5688-258-0x0000000002D00000-0x0000000002D22000-memory.dmp
memory/5688-259-0x0000000002D00000-0x0000000002D22000-memory.dmp
memory/5688-260-0x0000000003370000-0x00000000033A7000-memory.dmp
memory/5688-261-0x0000000003370000-0x00000000033A7000-memory.dmp
memory/5688-262-0x0000000003370000-0x00000000033A7000-memory.dmp
memory/5688-263-0x0000000003370000-0x00000000033A7000-memory.dmp
memory/5688-264-0x0000000003370000-0x00000000033A7000-memory.dmp
memory/5688-265-0x0000000004200000-0x000000000421B000-memory.dmp
memory/5688-270-0x0000000003370000-0x00000000033A7000-memory.dmp
memory/5688-271-0x0000000003370000-0x00000000033A7000-memory.dmp
memory/5688-273-0x0000000002D00000-0x0000000002D22000-memory.dmp
memory/5688-272-0x0000000002D00000-0x0000000002D22000-memory.dmp
memory/5688-276-0x0000000003370000-0x00000000033A7000-memory.dmp