Behavioral task
behavioral1
Sample
bull.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
bull.exe
Resource
win10v2004-20240412-en
General
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Target
bull.exe
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Size
193KB
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MD5
c02fcb47dbcee1627bb815e13b702d68
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SHA1
5ce2e7e061fcf28a64c8a7cc0ce3e496e706685d
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SHA256
b499e3ca6d662869baafa1ce36799f272b893b4c92751763bda78ad8bdaacdc3
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SHA512
abfd9fde8063acc29bc4f390ad8e2883bf84dc0e2978b3e31a698481827faab4c46439bef3900e247891f9a2521e39f2bf0fe320368d81559a2bdd809a4793c9
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SSDEEP
3072:X4g6hHrnaWRbywYRUUIOqd+4NpVq8BxFRzaqF+o2GQJ7/JzqVfGvf:XwJaWRbTYRUUg+gVqwlL
Malware Config
Extracted
xworm
https://pastebin.com/raw/mfW9zYDR:8080
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Install_directory
%AppData%
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install_file
XClient.exe
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pastebin_url
https://pastebin.com/raw/mfW9zYDR
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 bull.exe
Files
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bull.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: 77KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rsrc Size: 114KB - Virtual size: 114KB
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