Analysis
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max time kernel
135s -
max time network
143s -
platform
windows10-2004_x64 -
resource
win10v2004-20240802-en -
resource tags
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submitted
30-08-2024 01:33
General
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Target
letsvpn-latest_1.exe
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Size
17.6MB
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MD5
3d21d1aafdddb6eb0a1220527434e071
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SHA1
7177e238087cbddb734ea69d67a856a3c48034cb
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SHA256
5451ef2f179abb86f8d8464815fe4965d4619025395aae3ab2e1337de90f48a3
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SHA512
faaf0699149f81bfd78893097c2fcf00255ec8c47159145931e84581f493b5dff3e99469d2304d57e6f902fcfb38b171d57958b067000d3640c5b0b1f756eb66
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SSDEEP
393216:VbSXb4YVsff4ePzvH8GVkOu37wT1V46ffPDbDn7u16DPGk:VlM5eLf8CM7wX4SfPrG6DPV
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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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
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Executes dropped EXE 5 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 64 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 35 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\letsvpn-latest_1.exe"C:\Users\Admin\AppData\Local\Temp\letsvpn-latest_1.exe"1⤵
- Checks computer location settings
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
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C:\Program Files (x86)\u2.exe"C:\Program Files (x86)\u2.exe"2⤵
- Executes dropped EXE
- Adds Run key to start application
- Checks whether UAC is enabled
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- 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
- 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
- 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.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\7ZSfx000.cmd" "2⤵
- System Location Discovery: System Language Discovery
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
5.7MB
MD5375ece9b0598e7f27e7b3867c6e3fb4e
SHA13c21bb73c1401699da6c0c0a8b91d76b1c2e4214
SHA256124d55ed7a9acd4c1a62622e549d169647480af1795a7f0610642f485d46689e
SHA5121b5732bfc7127c3c16f413df6671350ea741041198b7aee51ea2164da8b13cc0d7937c8c7c6d41bdd785807d6e5548fda451b55d9d796a17160f2e39325f11c1
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Filesize
204B
MD54d21428db2892563e2dbee53510d7b59
SHA14a4f1e9564bba3eb220f2836c9de86d8f35684c3
SHA256a35c486230d13fb283285e584ff5ef9fa5fb52b6b67a8875a061f10b2065f896
SHA5123d70af2394ce850205b0ee2f9bd040ddb600fb3ba7ba49b126ea6028fafe1f8d3bda2c4c3416ac67a1530cbddc9fd54314f977dd1b5aed63ffcda452e719ed24
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Filesize
16KB
MD5cdce4713e784ae069d73723034a957ff
SHA19a393a6bab6568f1a774fb753353223f11367e09
SHA256b29e48102ecb3d3614e8980a8b8cc63dd2b993c6346f466479244ec2b47b69d8
SHA5120a3a59a305cc2a6fad4e1315b0bcc5a4129595dfe1e8b703363fa02528d2d7c48d3fd22d365708be84a5557cf1916873df9563c454732f93f94a66e7e3b9fb0f
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Filesize
196KB
MD530d23f10472dd50fe915a1fba10e7e3b
SHA1cc22c36a4e926b54406547fc294b17e7d950ebd0
SHA25674dd9e8e73570af631ff8661f0b7e78e3dd890042fe130831b8b10cd8d3da563
SHA512f0025ab2d6797aca0aab50b89eaf03da228a1ee29ba14ea3191da22dfc9d57ad2d47419a258e758161a8549873b5ab78ec4763988bd4e928eed953bcc438d2df
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Filesize
9KB
MD5523d5c39f9d8d2375c3df68251fa2249
SHA1d4ed365c44bec9246fc1a65a32a7791792647a10
SHA25620e3dc90a3e83b6202e2a7f4603b60e5e859639cb68693426c400b13aaeabd78
SHA512526e1bba30d03f1ac177c6ab7409187a730969c429cebef15da68ffcf44b3b93227781eebc827b2f7a0fa17c391e00a0e532263fd0167aeaeb0456f96cfe3ae4
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Filesize
5.8MB
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Filesize
5.8MB
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Filesize
204KB
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Filesize
204KB
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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
5.8MB
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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
260KB
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Filesize
260KB
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Filesize
260KB
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Filesize
260KB