Behavioral task
behavioral1
Sample
XnullClient.exe
Resource
win11-20240221-en
General
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Target
XnullClient.exe
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Size
246KB
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MD5
e75aa49c9c45f34d7adc06c26cb5713b
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SHA1
26d70fa548bf244ef8f3918e8eac34270fc285b7
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SHA256
7c0047ceec6b6dab29c0fe2774fcbe0e514f9349ce02cf900da72104490c60ac
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SHA512
409893b10cb8fe16270f10f0c6d3ba22cd1660e5e7ceb2eb32b2b82a22c3dabf61d42ad1601c1976b7fd82de4e8ed4226fae20012a9290dcc37675c06868a0d7
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SSDEEP
3072:OsirFsIbSyEzhnCeOA3Mlea8SKfbzxcwg7es6/Vsb8VKTu549oJMfF/H9N3Ky9NS:rVIboseaUhcX7elbKTua9bfF/H9d9n
Malware Config
Extracted
xworm
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Install_directory
%AppData%
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install_file
USB.exe
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pastebin_url
https://pastebin.com/raw/LN6JZUsV
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 XnullClient.exe
Files
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XnullClient.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: 78KB - Virtual size: 78KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rsrc Size: 166KB - Virtual size: 166KB
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