General
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Target
winlogon.exe
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Size
59KB
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MD5
f2a18b995a82e938ab6a067491aa0d79
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SHA1
d437fca2f38d712bafae8c92169eec8934699e54
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SHA256
8efa6f0711c60afd3e6cb29df2b740ee4d01b7f4290a223aa85c6f54fb3b9da5
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SHA512
73db4ec0271045f3f2c40fa197cf6300d81f32e4ecdddf792b475c8234d997c8d9ddfd62f944f230d8929017dfd1f473fbf4470f3bf6c2e92a8606cd3fed6d56
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SSDEEP
1536:CcG/DG/fDG+wopontVm+4ys9bFKR4F+9E6ywbgOmXvkAq:CcGGfDG+wWoPm+4X9bFKac/0Omfbq
Malware Config
Extracted
xworm
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Install_directory
%ProgramData%
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install_file
winlogon.exe
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pastebin_url
https://pastebin.com/raw/QUwdrCNg
Signatures
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Detect Xworm Payload 1 IoCs
resource yara_rule sample family_xworm -
Xworm family
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Unsigned PE 1 IoCs
Checks for missing Authenticode signature.
resource winlogon.exe
Files
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winlogon.exe.exe windows:4 windows x86 arch:x86
f34d5f2d4577ed6d9ceec516c1f5a744
Headers
DLL Characteristics
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_NO_SEH
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE
File Characteristics
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_32BIT_MACHINE
Imports
mscoree
_CorExeMain
Sections
.text Size: 56KB - Virtual size: 55KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rsrc Size: 2KB - Virtual size: 1KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.reloc Size: 512B - Virtual size: 12B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ