Analysis
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max time kernel
122s -
max time network
146s -
platform
windows7_x64 -
resource
win7-20240704-en -
resource tags
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submitted
07-08-2024 14:37
General
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Target
letsvpn-latest.exe
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Size
15.1MB
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MD5
9955837b547b049e589b4c6bcb663b3d
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SHA1
1547ee7757789f420268245adae70f6224548515
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SHA256
d972127893bdc4523b0f63ca4f8a3d55db64a52a86dcae0db523f339f4d0a723
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SHA512
31cf10306d5e1ea2f7beed8a1718fbbcb08b4a1965a93ab78716c5f7e06fa04772288c37a36340098fdd1b9a15cbfe164df0b30f4c796326e56cb814661e1d6d
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SSDEEP
393216:hVhKO2IhWbf5F7Dt5KOZAMIXVyZtXrBuMgpx1W+k0yn:hf2Iy5F7DmOCMPtBuPzW+kn
Malware Config
Signatures
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FatalRat
FatalRat is a modular infostealer family written in C++ first appearing in June 2021.
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Fatal Rat payload 1 IoCs
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ASPack v2.12-2.42 1 IoCs
Detects executables packed with ASPack v2.12-2.42
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Deletes itself 1 IoCs
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Executes dropped EXE 5 IoCs
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Loads dropped DLL 8 IoCs
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UPX packed file 2 IoCs
Detects executables packed with UPX/modified UPX open source packer.
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Adds Run key to start application 2 TTPs 1 IoCs
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Checks whether UAC is enabled 1 TTPs 1 IoCs
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Suspicious use of SetThreadContext 3 IoCs
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Drops file in Program Files directory 64 IoCs
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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System Location Discovery: System Language Discovery 1 TTPs 7 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
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Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
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Suspicious behavior: EnumeratesProcesses 51 IoCs
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Suspicious use of AdjustPrivilegeToken 1 IoCs
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Suspicious use of SetWindowsHookEx 4 IoCs
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Suspicious use of WriteProcessMemory 41 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\letsvpn-latest.exe"C:\Users\Admin\AppData\Local\Temp\letsvpn-latest.exe"1⤵
- Loads dropped DLL
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
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C:\Program Files (x86)\ubc.exe"C:\Program Files (x86)\ubc.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
- Adds Run key to start application
- Checks whether UAC is enabled
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Users\Public\Documents\sougou\V4.6.80\Bin\QTalk.exeC:\Users\Public\Documents\sougou\V4.6.80\Bin\QTalk.exe3⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Users\Public\Documents\sougou\spolsvt.exeC:\Users\Public\Documents\sougou\spolsvt.exe4⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
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C:\Users\Public\Documents\dd\spolsvt.exeC:\Users\Public\Documents\dd\spolsvt.exe5⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Users\Public\Documents\uu\svcoth.exeC:\Users\Public\Documents\uu\svcoth.exe5⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
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C:\Windows\SysWOW64\cmd.execmd /c ""C:\Users\Admin\AppData\Local\Temp\7ZSfx000.cmd" "2⤵
- Deletes itself
- System Location Discovery: System Language Discovery
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
200B
MD549392034c34a69a3d76f8b0a73b40279
SHA165a9e49b2bd4d1af694ef07bf73096c1985a0ff8
SHA256b1a2d0b53be9fc6e3a3a7a394192cc640b08d5b59097624feba6f519072c54a0
SHA5129cd6ab4d4e5e0b2e60b1b9bb7cd382eb66afbb6079d7bf560708a43c1bee662d6fa2a2b491bc316abbaff80b425c2bdb69740cad60d543eeef056800afdc0068
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Filesize
196KB
MD5fc51b596793d77c284e29c7b1371c1e9
SHA1af3bec0adbcb9ec9b10ed7c4f826fc5137d6db3f
SHA256157507c0e3aaababdb6087104a9841995c1cd5b06991bccf192cba68cbfb2281
SHA512e160812d3d8d33d2ca4df4177073e7a8dedfad443f49cd87316d049b1a9efcfe5de14d8aabb7c900a6b484181fe34a71f4ca70c31f7fcaf76679b649fffaa73d
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Filesize
9KB
MD5523d5c39f9d8d2375c3df68251fa2249
SHA1d4ed365c44bec9246fc1a65a32a7791792647a10
SHA25620e3dc90a3e83b6202e2a7f4603b60e5e859639cb68693426c400b13aaeabd78
SHA512526e1bba30d03f1ac177c6ab7409187a730969c429cebef15da68ffcf44b3b93227781eebc827b2f7a0fa17c391e00a0e532263fd0167aeaeb0456f96cfe3ae4
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Filesize
786KB
MD54f927a44963d8b315693cdf2c4695dd3
SHA171aa9de5a5882f0f5d8c4bb7ba980f9b3c68e11d
SHA25673f4ea90010122716aa80f43a9d40bf2d5b38f023199f26ec04d4a866e113d3d
SHA5124cbb156404badcd37d8a2c1a1e57017e63ea7b498c6b913685026ce175eca683724956b691ee31b944f4aa5b752aa6a8d21b45391ca65ba76811debd8efe7f9c
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Filesize
16KB
MD5cdce4713e784ae069d73723034a957ff
SHA19a393a6bab6568f1a774fb753353223f11367e09
SHA256b29e48102ecb3d3614e8980a8b8cc63dd2b993c6346f466479244ec2b47b69d8
SHA5120a3a59a305cc2a6fad4e1315b0bcc5a4129595dfe1e8b703363fa02528d2d7c48d3fd22d365708be84a5557cf1916873df9563c454732f93f94a66e7e3b9fb0f
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Filesize
168KB
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Filesize
192KB
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Filesize
192KB
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Filesize
192KB
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Filesize
192KB
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Filesize
4KB
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Filesize
192KB
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Filesize
192KB
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Filesize
260KB
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Filesize
260KB
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Filesize
260KB
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Filesize
260KB
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Filesize
4KB
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Filesize
260KB
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Filesize
260KB
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Filesize
112KB
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Filesize
112KB
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Filesize
112KB
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Filesize
112KB
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Filesize
112KB
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Filesize
112KB
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Filesize
112KB
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Filesize
112KB
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Filesize
2.0MB
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Filesize
2.0MB
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Filesize
2.0MB
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Filesize
2.0MB
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Filesize
768KB
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Filesize
2.0MB
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Filesize
2.0MB
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Filesize
204KB
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Filesize
204KB
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Filesize
2.0MB
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Filesize
2.0MB
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Filesize
2.0MB
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Filesize
2.0MB