Analysis
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max time kernel
110s -
max time network
93s -
platform
windows7_x64 -
resource
win7-20240903-en -
resource tags
arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system -
submitted
10-11-2024 01:40
Behavioral task
behavioral1
Sample
a44c2a6d65bb122b450d52b51af726ebd349020048ffb9225be9cefe88510080N.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
a44c2a6d65bb122b450d52b51af726ebd349020048ffb9225be9cefe88510080N.exe
Resource
win10v2004-20241007-en
General
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Target
a44c2a6d65bb122b450d52b51af726ebd349020048ffb9225be9cefe88510080N.exe
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Size
89KB
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MD5
0aa4c3cea8de31fa7ecb1564d1e07e00
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SHA1
cb034c1a34af9e1c0fddaf8cba3024e28f20af23
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SHA256
a44c2a6d65bb122b450d52b51af726ebd349020048ffb9225be9cefe88510080
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SHA512
9d3498f62fa9122a3b6c3d5f34f49872c0c444dc1ba964f3eb77be253eca4656753f30b29ced98203971e31f5211d1ff79f024a253cb183f09ade3ed49519447
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SSDEEP
1536:yr3Z5IfQmv81a7pP1xF3yX2tM/jTEwwwEiiiixMkMMMMO:WJOfQm01q9X3yX2q/jTJp
Malware Config
Signatures
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Sets file to hidden 1 TTPs 1 IoCs
Modifies file attributes to stop it showing in Explorer etc.
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Deletes itself 1 IoCs
Processes:
cmd.exepid process 2344 cmd.exe -
Executes dropped EXE 1 IoCs
Processes:
iuyhost.exepid process 2156 iuyhost.exe -
Indicator Removal: File Deletion 1 TTPs
Adversaries may delete files left behind by the actions of their intrusion activity.
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Processes:
resource yara_rule behavioral1/memory/2872-0-0x0000000000400000-0x0000000000416000-memory.dmp upx C:\Windows\debug\iuyhost.exe upx behavioral1/memory/2156-5-0x0000000000400000-0x0000000000416000-memory.dmp upx behavioral1/memory/2872-6-0x0000000000400000-0x0000000000416000-memory.dmp upx behavioral1/memory/2156-7-0x0000000000400000-0x0000000000416000-memory.dmp upx -
Drops file in Windows directory 3 IoCs
Processes:
a44c2a6d65bb122b450d52b51af726ebd349020048ffb9225be9cefe88510080N.exeattrib.exedescription ioc process File created C:\Windows\Debug\iuyhost.exe a44c2a6d65bb122b450d52b51af726ebd349020048ffb9225be9cefe88510080N.exe File opened for modification C:\Windows\Debug\iuyhost.exe a44c2a6d65bb122b450d52b51af726ebd349020048ffb9225be9cefe88510080N.exe File opened for modification C:\Windows\Debug\iuyhost.exe attrib.exe -
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 4 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
Processes:
a44c2a6d65bb122b450d52b51af726ebd349020048ffb9225be9cefe88510080N.exeattrib.exeiuyhost.execmd.exedescription ioc process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language a44c2a6d65bb122b450d52b51af726ebd349020048ffb9225be9cefe88510080N.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language attrib.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language iuyhost.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe -
Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
iuyhost.exedescription ioc process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 iuyhost.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz iuyhost.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
a44c2a6d65bb122b450d52b51af726ebd349020048ffb9225be9cefe88510080N.exedescription pid process Token: SeIncBasePriorityPrivilege 2872 a44c2a6d65bb122b450d52b51af726ebd349020048ffb9225be9cefe88510080N.exe -
Suspicious use of WriteProcessMemory 8 IoCs
Processes:
a44c2a6d65bb122b450d52b51af726ebd349020048ffb9225be9cefe88510080N.exedescription pid process target process PID 2872 wrote to memory of 492 2872 a44c2a6d65bb122b450d52b51af726ebd349020048ffb9225be9cefe88510080N.exe attrib.exe PID 2872 wrote to memory of 492 2872 a44c2a6d65bb122b450d52b51af726ebd349020048ffb9225be9cefe88510080N.exe attrib.exe PID 2872 wrote to memory of 492 2872 a44c2a6d65bb122b450d52b51af726ebd349020048ffb9225be9cefe88510080N.exe attrib.exe PID 2872 wrote to memory of 492 2872 a44c2a6d65bb122b450d52b51af726ebd349020048ffb9225be9cefe88510080N.exe attrib.exe PID 2872 wrote to memory of 2344 2872 a44c2a6d65bb122b450d52b51af726ebd349020048ffb9225be9cefe88510080N.exe cmd.exe PID 2872 wrote to memory of 2344 2872 a44c2a6d65bb122b450d52b51af726ebd349020048ffb9225be9cefe88510080N.exe cmd.exe PID 2872 wrote to memory of 2344 2872 a44c2a6d65bb122b450d52b51af726ebd349020048ffb9225be9cefe88510080N.exe cmd.exe PID 2872 wrote to memory of 2344 2872 a44c2a6d65bb122b450d52b51af726ebd349020048ffb9225be9cefe88510080N.exe cmd.exe -
Views/modifies file attributes 1 TTPs 1 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\a44c2a6d65bb122b450d52b51af726ebd349020048ffb9225be9cefe88510080N.exe"C:\Users\Admin\AppData\Local\Temp\a44c2a6d65bb122b450d52b51af726ebd349020048ffb9225be9cefe88510080N.exe"1⤵
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2872 -
C:\Windows\SysWOW64\attrib.exeattrib +a +s +h +r C:\Windows\Debug\iuyhost.exe2⤵
- Sets file to hidden
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Views/modifies file attributes
PID:492 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\A44C2A~1.EXE > nul2⤵
- Deletes itself
- System Location Discovery: System Language Discovery
PID:2344
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C:\Windows\Debug\iuyhost.exeC:\Windows\Debug\iuyhost.exe1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Checks processor information in registry
PID:2156
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
89KB
MD5cb4a32ad2be645dd5b3e630b5bb349db
SHA12a756d2f5ea559fc5f877faa6595f04fad5822e7
SHA256e62a30f567b69c61a7c0617f14aa1d32059c1e1cb2c52db283b52d20e5e3e5ce
SHA512242f4e39a627df356c19a56bd82461ace123af16cfa7929d7d64471290fea2b26afb2da8094da2e44724e8b6d37229ad50100e4989f8527657c2379f5ca845f0