Analysis
- user interaction
yes - max time kernel
599s - max time network
601s - platform
windows10-2004_x64 - resource
win10v2004-20260513-ja - resource tags
- submitted
04/08/2026, 18:44
General
- Target 04082026_1532_04082026_tax returns.zip
- Size 34KB
- Sample260804-xdx7vack4s
- SHA256 7a330c11f130d4c459ba733f0fc2a7adafa5093d4a7f41d7b87a92e498d5390f
Malware Config
Signatures
- Family: ValleyRat
ValleyRat stage2 is a backdoor written in C++.
- Family: valleyrat
- Detects ValleyRAT payload 9 IoCs
- https://www.esentire.com/blog/winos4-0-online-module-staging-component-used-in-cleversoar-campaign 26 IoCs
- Enumerates connected drives 3 TTPs 63 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
- Suspicious use of AdjustPrivilegeToken 3 IoCs
Processes
-
C:\Windows\Explorer.exeC:\Windows\Explorer.exe /idlist,,"C:\Users\Admin\AppData\Local\Temp\04082026_1532_04082026_tax returns.zip"1⤵
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C:\Windows\System32\rundll32.exeC:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding1⤵
-
\??\E:\tax returns.exe"E:\tax returns.exe"1⤵
- Enumerates connected drives
- Suspicious use of AdjustPrivilegeToken
-
\??\E:\tax returns.exe"E:\tax returns.exe"1⤵
- Enumerates connected drives
- Suspicious use of AdjustPrivilegeToken
-
\??\E:\tax returns.exe"E:\tax returns.exe"1⤵
- Enumerates connected drives
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
memory/1004-14-0x000001FF83880000-0x000001FF83890000-memory.dmp
memory/1004-10-0x000001FF9C5B0000-0x000001FF9C600000-memory.dmp
memory/1004-2-0x000001FF9C1E0000-0x000001FF9C1E1000-memory.dmp
memory/1004-3-0x000001FF9C300000-0x000001FF9C32A000-memory.dmp
memory/1004-4-0x000001FF9C270000-0x000001FF9C2F1000-memory.dmp
memory/1004-5-0x000001FF9C300000-0x000001FF9C32A000-memory.dmp
memory/1004-6-0x000001FF9C300000-0x000001FF9C32A000-memory.dmp
memory/1004-7-0x000001FF9C300000-0x000001FF9C32A000-memory.dmp
memory/1004-8-0x000001FF9C300000-0x000001FF9C32A000-memory.dmp
memory/1004-9-0x000001FF9C5B0000-0x000001FF9C600000-memory.dmp
memory/1004-11-0x000001FF9C5B0000-0x000001FF9C600000-memory.dmp
memory/1004-0-0x000001FF81F60000-0x000001FF81F66000-memory.dmp
memory/1004-12-0x000001FF9C300000-0x000001FF9C32A000-memory.dmp
memory/1004-13-0x000001FF9C300000-0x000001FF9C32A000-memory.dmp
memory/1004-1-0x000001FF83880000-0x000001FF83890000-memory.dmp
memory/1268-24-0x00000214F1140000-0x00000214F116A000-memory.dmp
memory/1268-31-0x00000214F1140000-0x00000214F116A000-memory.dmp
memory/1268-30-0x00000214F13A0000-0x00000214F13F0000-memory.dmp
memory/1268-29-0x00000214F13A0000-0x00000214F13F0000-memory.dmp
memory/1268-28-0x00000214F13A0000-0x00000214F13F0000-memory.dmp
memory/1268-27-0x00000214F1140000-0x00000214F116A000-memory.dmp
memory/1268-26-0x00000214F1140000-0x00000214F116A000-memory.dmp
memory/1268-25-0x00000214F1140000-0x00000214F116A000-memory.dmp
memory/3520-16-0x000001BAA5A00000-0x000001BAA5A2A000-memory.dmp
memory/3520-23-0x000001BAA5A00000-0x000001BAA5A2A000-memory.dmp
memory/3520-20-0x000001BAA5BE0000-0x000001BAA5C30000-memory.dmp
memory/3520-21-0x000001BAA5BE0000-0x000001BAA5C30000-memory.dmp
memory/3520-19-0x000001BAA5BE0000-0x000001BAA5C30000-memory.dmp
memory/3520-15-0x000001BAA5A00000-0x000001BAA5A2A000-memory.dmp
memory/3520-17-0x000001BAA5A00000-0x000001BAA5A2A000-memory.dmp
memory/3520-18-0x000001BAA5A00000-0x000001BAA5A2A000-memory.dmp