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Analysis
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max time kernel
147s -
max time network
133s -
platform
windows7_x64 -
resource
win7-20220812-en -
resource tags
arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system -
submitted
18/10/2022, 05:40
Static task
static1
Behavioral task
behavioral1
Sample
a90af5e481a9f7262a9dc360391beaa689b52b47d6fcd624d08f5b59701ab2fa.exe
Resource
win7-20220812-en
Behavioral task
behavioral2
Sample
a90af5e481a9f7262a9dc360391beaa689b52b47d6fcd624d08f5b59701ab2fa.exe
Resource
win10v2004-20220812-en
General
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Target
a90af5e481a9f7262a9dc360391beaa689b52b47d6fcd624d08f5b59701ab2fa.exe
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Size
66KB
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MD5
0d7dd2b8095e7f26ca11802ca11239ab
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SHA1
7fa59c339e421f381942ff738cc6a5caa00b5a90
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SHA256
a90af5e481a9f7262a9dc360391beaa689b52b47d6fcd624d08f5b59701ab2fa
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SHA512
4fbede484c463e74c796c48f07981d0bc58b7d56a2edb2681d80de1e949dee70071abd59388d41f2af44319ef820e0d31c45a20adc0d8c69026e755fa343127e
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SSDEEP
768:OrItKyw5WHXfQmjIiIk9ecAa7pP1VMs96MyX9DdtldE9rIIIwjFEEEQBggggu:Or3Z5IfQmv81a7pP1F3yXFdtnSju
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
pid Process 1736 lyehost.exe -
Sets file to hidden 1 TTPs 1 IoCs
Modifies file attributes to stop it showing in Explorer etc.
pid Process 2004 attrib.exe -
Deletes itself 1 IoCs
pid Process 984 cmd.exe -
Drops file in Windows directory 3 IoCs
description ioc Process File created C:\Windows\Debug\lyehost.exe a90af5e481a9f7262a9dc360391beaa689b52b47d6fcd624d08f5b59701ab2fa.exe File opened for modification C:\Windows\Debug\lyehost.exe a90af5e481a9f7262a9dc360391beaa689b52b47d6fcd624d08f5b59701ab2fa.exe File opened for modification C:\Windows\Debug\lyehost.exe attrib.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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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 lyehost.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz lyehost.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeIncBasePriorityPrivilege 544 a90af5e481a9f7262a9dc360391beaa689b52b47d6fcd624d08f5b59701ab2fa.exe -
Suspicious use of WriteProcessMemory 8 IoCs
description pid Process procid_target PID 544 wrote to memory of 2004 544 a90af5e481a9f7262a9dc360391beaa689b52b47d6fcd624d08f5b59701ab2fa.exe 26 PID 544 wrote to memory of 2004 544 a90af5e481a9f7262a9dc360391beaa689b52b47d6fcd624d08f5b59701ab2fa.exe 26 PID 544 wrote to memory of 2004 544 a90af5e481a9f7262a9dc360391beaa689b52b47d6fcd624d08f5b59701ab2fa.exe 26 PID 544 wrote to memory of 2004 544 a90af5e481a9f7262a9dc360391beaa689b52b47d6fcd624d08f5b59701ab2fa.exe 26 PID 544 wrote to memory of 984 544 a90af5e481a9f7262a9dc360391beaa689b52b47d6fcd624d08f5b59701ab2fa.exe 29 PID 544 wrote to memory of 984 544 a90af5e481a9f7262a9dc360391beaa689b52b47d6fcd624d08f5b59701ab2fa.exe 29 PID 544 wrote to memory of 984 544 a90af5e481a9f7262a9dc360391beaa689b52b47d6fcd624d08f5b59701ab2fa.exe 29 PID 544 wrote to memory of 984 544 a90af5e481a9f7262a9dc360391beaa689b52b47d6fcd624d08f5b59701ab2fa.exe 29 -
Views/modifies file attributes 1 TTPs 1 IoCs
pid Process 2004 attrib.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\a90af5e481a9f7262a9dc360391beaa689b52b47d6fcd624d08f5b59701ab2fa.exe"C:\Users\Admin\AppData\Local\Temp\a90af5e481a9f7262a9dc360391beaa689b52b47d6fcd624d08f5b59701ab2fa.exe"1⤵
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:544 -
C:\Windows\SysWOW64\attrib.exeattrib +a +s +h +r C:\Windows\Debug\lyehost.exe2⤵
- Sets file to hidden
- Drops file in Windows directory
- Views/modifies file attributes
PID:2004
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\A90AF5~1.EXE > nul2⤵
- Deletes itself
PID:984
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C:\Windows\Debug\lyehost.exeC:\Windows\Debug\lyehost.exe1⤵
- Executes dropped EXE
- Checks processor information in registry
PID:1736
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
66KB
MD538468a3895922b80d28e0c9e51c057c8
SHA1e54bc7df0d99008bc9636ad520afca925a28db4c
SHA256f1b5cecfa47b3d1647e7469fe4f226a44ce6b6d0c90099ec9eaab6d9162ad751
SHA512cabf883bbc4499a6e96f8fd19ca21ac8b8e90745b89bfe5459c78931f6eec30134e4578ffd0a640a4f2750d311eb89409b7bfe733b23099800167ddd46d7a744
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Filesize
66KB
MD538468a3895922b80d28e0c9e51c057c8
SHA1e54bc7df0d99008bc9636ad520afca925a28db4c
SHA256f1b5cecfa47b3d1647e7469fe4f226a44ce6b6d0c90099ec9eaab6d9162ad751
SHA512cabf883bbc4499a6e96f8fd19ca21ac8b8e90745b89bfe5459c78931f6eec30134e4578ffd0a640a4f2750d311eb89409b7bfe733b23099800167ddd46d7a744