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Analysis
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max time kernel
120s -
max time network
95s -
platform
windows10-2004_x64 -
resource
win10v2004-20240802-en -
resource tags
arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system -
submitted
19/09/2024, 05:39
Static task
static1
Behavioral task
behavioral1
Sample
1fc91b4ed4483a76906d1e645bf8edffe3b79ed0cd9b1bdcca074a45ade80065N.exe
Resource
win7-20240704-en
Behavioral task
behavioral2
Sample
1fc91b4ed4483a76906d1e645bf8edffe3b79ed0cd9b1bdcca074a45ade80065N.exe
Resource
win10v2004-20240802-en
General
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Target
1fc91b4ed4483a76906d1e645bf8edffe3b79ed0cd9b1bdcca074a45ade80065N.exe
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Size
84KB
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MD5
60e167f76f4720395a74883b4e84c2e0
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SHA1
65d78d96060a7b7479d6927be12fc03b127bed92
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SHA256
1fc91b4ed4483a76906d1e645bf8edffe3b79ed0cd9b1bdcca074a45ade80065
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SHA512
67458a936570ae384b2019a2258b3e52076ef3aa06e824650099317a0976f2325941ab13041dfd86c5593e16f19c5258734e341920fc539e03a57cef5b706b61
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SSDEEP
768:DyV+hOvoUkwzNXgfFP/8IWi3KEyUhL7b7Yqlf4JwQltjmtTBHi7Al8:DoFvp5Knv76Ezh/vYlJwAitTB3l8
Malware Config
Signatures
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Modifies visiblity of hidden/system files in Explorer 2 TTPs 1 IoCs
description ioc Process Set value (int) \REGISTRY\USER\S-1-5-21-523280732-2327480845-3730041215-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" yaiey.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-523280732-2327480845-3730041215-1000\Control Panel\International\Geo\Nation 1fc91b4ed4483a76906d1e645bf8edffe3b79ed0cd9b1bdcca074a45ade80065N.exe -
Executes dropped EXE 1 IoCs
pid Process 4144 yaiey.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-523280732-2327480845-3730041215-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yaiey = "C:\\Users\\Admin\\yaiey.exe" yaiey.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Program crash 1 IoCs
pid pid_target Process procid_target 1392 4276 WerFault.exe 81 -
System Location Discovery: System Language Discovery 1 TTPs 2 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 1fc91b4ed4483a76906d1e645bf8edffe3b79ed0cd9b1bdcca074a45ade80065N.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language yaiey.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe 4144 yaiey.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 4276 1fc91b4ed4483a76906d1e645bf8edffe3b79ed0cd9b1bdcca074a45ade80065N.exe 4144 yaiey.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 4276 wrote to memory of 4144 4276 1fc91b4ed4483a76906d1e645bf8edffe3b79ed0cd9b1bdcca074a45ade80065N.exe 84 PID 4276 wrote to memory of 4144 4276 1fc91b4ed4483a76906d1e645bf8edffe3b79ed0cd9b1bdcca074a45ade80065N.exe 84 PID 4276 wrote to memory of 4144 4276 1fc91b4ed4483a76906d1e645bf8edffe3b79ed0cd9b1bdcca074a45ade80065N.exe 84
Processes
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C:\Users\Admin\AppData\Local\Temp\1fc91b4ed4483a76906d1e645bf8edffe3b79ed0cd9b1bdcca074a45ade80065N.exe"C:\Users\Admin\AppData\Local\Temp\1fc91b4ed4483a76906d1e645bf8edffe3b79ed0cd9b1bdcca074a45ade80065N.exe"1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4276 -
C:\Users\Admin\yaiey.exe"C:\Users\Admin\yaiey.exe"2⤵
- Modifies visiblity of hidden/system files in Explorer
- Executes dropped EXE
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
PID:4144
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4276 -s 15122⤵
- Program crash
PID:1392
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 4276 -ip 42761⤵PID:4756
Network
MITRE ATT&CK Enterprise v15
Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Defense Evasion
Hide Artifacts
1Hidden Files and Directories
1Modify Registry
2Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
84KB
MD5597d9e5fb5f75fb64f7a8b7c19b5d105
SHA11569afb5ea60abb48a81a7909d26bf407cdfbc44
SHA2562f1cd296e943a3aa5940d974624ae9d7e8b470ec75224f2c088ec14983492302
SHA51220d6abee2bdecccfdbe9a87ede56377921712e54e9e0ebb96ae8616f0d200086ecc1a213127fe8677165c3fd42f6267b62e2e84203ededd3d11b0a65d95c6244