Analysis
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max time kernel
119s -
max time network
120s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
19/01/2025, 12:04
Static task
static1
Behavioral task
behavioral1
Sample
b4ce92413122d3e86b3044bfc518c6bf3d12d9a9c5ad7b7c03c265f19e775628.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
b4ce92413122d3e86b3044bfc518c6bf3d12d9a9c5ad7b7c03c265f19e775628.exe
Resource
win10v2004-20241007-en
General
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Target
b4ce92413122d3e86b3044bfc518c6bf3d12d9a9c5ad7b7c03c265f19e775628.exe
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Size
398KB
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MD5
e6f75da0133c679c36e837660002f099
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SHA1
368a629a708ea9f70402b288d015f417ecd31c1b
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SHA256
b4ce92413122d3e86b3044bfc518c6bf3d12d9a9c5ad7b7c03c265f19e775628
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SHA512
7a0463d776cb03c5243ac4c4795d2ebb6bb8c8805f12fc8b49925ba6d2bf64b49878ceee67b1b3b7a5afc7f28be335ba1765500a0230278da99fd768dbfe53d7
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SSDEEP
12288:vdDU6g13sJd1fm/+yb3O2jg82ydU/DdKumhm:vdE3sJd1fm/+yb3OYg84/JHym
Malware Config
Signatures
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Deletes itself 1 IoCs
pid Process 2912 ycynt.exe -
Executes dropped EXE 2 IoCs
pid Process 2912 ycynt.exe 2092 yuy.exe -
Loads dropped DLL 1 IoCs
pid Process 2092 yuy.exe -
Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\VIEW = "c:\\Program Files\\wqgaac\\yuy.exe \"c:\\Program Files\\wqgaac\\yuyyf.dll\",Viewer" yuy.exe -
Enumerates connected drives 3 TTPs 23 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
description ioc Process File opened (read-only) \??\h: yuy.exe File opened (read-only) \??\l: yuy.exe File opened (read-only) \??\p: yuy.exe File opened (read-only) \??\r: yuy.exe File opened (read-only) \??\t: yuy.exe File opened (read-only) \??\v: yuy.exe File opened (read-only) \??\y: yuy.exe File opened (read-only) \??\b: yuy.exe File opened (read-only) \??\e: yuy.exe File opened (read-only) \??\g: yuy.exe File opened (read-only) \??\j: yuy.exe File opened (read-only) \??\m: yuy.exe File opened (read-only) \??\n: yuy.exe File opened (read-only) \??\u: yuy.exe File opened (read-only) \??\w: yuy.exe File opened (read-only) \??\x: yuy.exe File opened (read-only) \??\z: yuy.exe File opened (read-only) \??\a: yuy.exe File opened (read-only) \??\i: yuy.exe File opened (read-only) \??\k: yuy.exe File opened (read-only) \??\o: yuy.exe File opened (read-only) \??\q: yuy.exe File opened (read-only) \??\s: yuy.exe -
Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs
Bootkits write to the MBR to gain persistence at a level below the operating system.
description ioc Process File opened for modification \??\PHYSICALDRIVE0 yuy.exe -
Drops file in Program Files directory 4 IoCs
description ioc Process File opened for modification \??\c:\Program Files\wqgaac\yuy.exe ycynt.exe File opened for modification \??\c:\Program Files\wqgaac ycynt.exe File created \??\c:\Program Files\wqgaac\yuyyf.dll ycynt.exe File created \??\c:\Program Files\wqgaac\yuy.exe ycynt.exe -
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.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language b4ce92413122d3e86b3044bfc518c6bf3d12d9a9c5ad7b7c03c265f19e775628.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language PING.EXE Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language ycynt.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language yuy.exe -
System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs
Adversaries may check for Internet connectivity on compromised systems.
pid Process 4252 cmd.exe 1896 PING.EXE -
Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 yuy.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString yuy.exe -
Runs ping.exe 1 TTPs 1 IoCs
pid Process 1896 PING.EXE -
Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 2092 yuy.exe 2092 yuy.exe 2092 yuy.exe 2092 yuy.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 2092 yuy.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 4980 b4ce92413122d3e86b3044bfc518c6bf3d12d9a9c5ad7b7c03c265f19e775628.exe 2912 ycynt.exe -
Suspicious use of WriteProcessMemory 12 IoCs
description pid Process procid_target PID 4980 wrote to memory of 4252 4980 b4ce92413122d3e86b3044bfc518c6bf3d12d9a9c5ad7b7c03c265f19e775628.exe 82 PID 4980 wrote to memory of 4252 4980 b4ce92413122d3e86b3044bfc518c6bf3d12d9a9c5ad7b7c03c265f19e775628.exe 82 PID 4980 wrote to memory of 4252 4980 b4ce92413122d3e86b3044bfc518c6bf3d12d9a9c5ad7b7c03c265f19e775628.exe 82 PID 4252 wrote to memory of 1896 4252 cmd.exe 84 PID 4252 wrote to memory of 1896 4252 cmd.exe 84 PID 4252 wrote to memory of 1896 4252 cmd.exe 84 PID 4252 wrote to memory of 2912 4252 cmd.exe 85 PID 4252 wrote to memory of 2912 4252 cmd.exe 85 PID 4252 wrote to memory of 2912 4252 cmd.exe 85 PID 2912 wrote to memory of 2092 2912 ycynt.exe 86 PID 2912 wrote to memory of 2092 2912 ycynt.exe 86 PID 2912 wrote to memory of 2092 2912 ycynt.exe 86
Processes
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C:\Users\Admin\AppData\Local\Temp\b4ce92413122d3e86b3044bfc518c6bf3d12d9a9c5ad7b7c03c265f19e775628.exe"C:\Users\Admin\AppData\Local\Temp\b4ce92413122d3e86b3044bfc518c6bf3d12d9a9c5ad7b7c03c265f19e775628.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4980 -
C:\Windows\SysWOW64\cmd.execmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\ycynt.exe "C:\Users\Admin\AppData\Local\Temp\b4ce92413122d3e86b3044bfc518c6bf3d12d9a9c5ad7b7c03c265f19e775628.exe"2⤵
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
- Suspicious use of WriteProcessMemory
PID:4252 -
C:\Windows\SysWOW64\PING.EXEping 127.0.0.1 -n 23⤵
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
- Runs ping.exe
PID:1896
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C:\Users\Admin\AppData\Local\Temp\ycynt.exeC:\Users\Admin\AppData\Local\Temp\\ycynt.exe "C:\Users\Admin\AppData\Local\Temp\b4ce92413122d3e86b3044bfc518c6bf3d12d9a9c5ad7b7c03c265f19e775628.exe"3⤵
- Deletes itself
- Executes dropped EXE
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2912 -
\??\c:\Program Files\wqgaac\yuy.exe"c:\Program Files\wqgaac\yuy.exe" "c:\Program Files\wqgaac\yuyyf.dll",Viewer C:\Users\Admin\AppData\Local\Temp\ycynt.exe4⤵
- Executes dropped EXE
- Loads dropped DLL
- Adds Run key to start application
- Enumerates connected drives
- Writes to the Master Boot Record (MBR)
- System Location Discovery: System Language Discovery
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2092
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Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Pre-OS Boot
1Bootkit
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Credential Access
Credentials from Password Stores
1Credentials from Web Browsers
1Unsecured Credentials
1Credentials In Files
1Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
60KB
MD5889b99c52a60dd49227c5e485a016679
SHA18fa889e456aa646a4d0a4349977430ce5fa5e2d7
SHA2566cbe0e1f046b13b29bfa26f8b368281d2dda7eb9b718651d5856f22cc3e02910
SHA51208933106eaf338dd119c45cbf1f83e723aff77cc0f8d3fc84e36253b1eb31557a54211d1d5d1cb58958188e32064d451f6c66a24b3963cccd3de07299ab90641
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Filesize
399KB
MD587fd08584741822b68468548956ff732
SHA1ab2c2921903528c230aca3396f9b2e864339d9e9
SHA2569254b13e02642186e4143624e68490ef7ad27da3e1968d2c3f03df1a4294d5c8
SHA512f8869186cbae9e45935e4057898012d89e023aeac31b3a80db23a8ae0fba7e5e663d5fe86a076aba1f7e3663bbe6a5464d51e0132319710604486e48df56c035
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Filesize
89KB
MD557d2548ab7766e18696f59d40b536f9a
SHA12a5004d19f2840a111ec10c842bf6747b28b23bf
SHA256d6142f471211704f4e86cc2e28381d0abd4cc6d43b085c77ac29b7a68050664a
SHA5124b3c9091d10778d553a03d7877aa6bae9c55a41e16d8a593a00dbbc2f17cbf83acd2fa08ec6698fdddae31d58c41b24d6938cec66fd17f0f61d5a6fa78061684