Behavioral task
behavioral1
Sample
csrss.exe
Resource
win10-20230220-en
Behavioral task
behavioral2
Sample
csrss.exe
Resource
win7-20230220-en
General
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Target
csrss.exe
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Size
5.1MB
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MD5
f3d969f5f4a4977a968808844234b7c4
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SHA1
f51cee9cd3cbd703280d837555fda673e17c25fc
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SHA256
dd81cd7153f636bd0ce9c1f8f90c10c014b4c47fc937ab271d720b502ec81722
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SHA512
4d41e1984cbf755c98d02ac14cd67d0cecc6d02e20b0e929d1931d9078c05e76d4f3d349257a0ea2c16d14d712a6fd4bc47ea3ad84c6399ac926144934b0ca04
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SSDEEP
98304:kyEwOTWOhGI1yXsXkd7GnHNovA9qOxBWJizLzdnT6WPU7MBkNK/H8kXGa:HEwmGI1yskdaHNaeqIzd7c7/NQ8X
Malware Config
Signatures
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resource yara_rule sample themida -
Unsigned PE 1 IoCs
Checks for missing Authenticode signature.
resource csrss.exe
Files
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csrss.exe.exe windows x86
Headers
DLL Characteristics
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE
File Characteristics
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_32BIT_MACHINE
Sections
Size: 1.2MB - Virtual size: 3.1MB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rsrc Size: 4KB - Virtual size: 3KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
Size: 512B - Virtual size: 12B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
.idata Size: 512B - Virtual size: 8KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.themida Size: - Virtual size: 5.9MB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.boot Size: 3.9MB - Virtual size: 3.9MB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ