Behavioral task
behavioral1
Sample
csrss.exe
Resource
win7-20230220-en
General
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Target
csrss.exe
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Size
3.8MB
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MD5
92e7f334d8a30300f09140ef19153de2
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SHA1
452657fb8d77847f693c8b7b62c6ac756ab77daf
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SHA256
41338f858938da50b6705683ef7617065378f90b5a5be30105cf5e10f40d6adb
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SHA512
207539310027155a420ff0404469173de3c6531aa17c263b678f6ebebfd44fe675d89dbd6a9a5e3cf85d470cc7f66b1f91efc8a27064160ad11536ff3fac7098
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SSDEEP
98304:eU1KQNS4l139BFTfh+rEZpg7HWnZXNN48HO1:91KLs9cEY7ONN48u1
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: 4.9MB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.boot Size: 2.6MB - Virtual size: 2.6MB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ