csrss[.]exe | Triage

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General

Target

csrss.exe
Size

37KB
MD5

696fb9d7e43f428634f31cf56361d7c3
SHA1

9006ccac001d1352d004788ac1d134bd266a82d7
SHA256

eac814cee400a078e2d549ba6e3d7bd09d1bc9805a1c6c9ec0610a0e558472a1
SHA512

da9f91fccb0038b0a06a27f1a2e5481907727fab1c963b325d4d663e351f750640c52d4d19770b7cee151d0ee3bcefaf9dc64fe8fef4f355f81a96bb64315070
SSDEEP

384:eXRMI/nW58nW2eG0mBDBRJiWq0Z1Z0R9zbPpk:2MohrTDB1Pi9sZ49zdk

Score

N/A

Malware Config

Signatures

Files

csrss.exe
.exe windows x64

a96fa9912e09e361274ad77f1a4b252c

Code Sign

33:00:00:03:72:31:35:9d:93:ab:3e:7b:1a:00:00:00:00:03:72
Certificate

Issuer

CN=Microsoft Windows Production PCA 2011,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

Not Before

27-01-2022 19:31

Not After

26-01-2023 19:31

Subject

CN=Microsoft Windows Publisher,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

Extended Key Usages

ExtKeyUsageCodeSigning

61:07:76:56:00:00:00:00:00:08
Certificate

Issuer

CN=Microsoft Root Certificate Authority 2010,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

Not Before

19-10-2011 18:41

Not After

19-10-2026 18:51

Subject

CN=Microsoft Windows Production PCA 2011,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

Key Usages

KeyUsageDigitalSignature
KeyUsageCertSign
KeyUsageCRLSign

05:cb:25:83:78:17:f1:f6:8c:4a:25:38:d8:4b:5b:37:78:68:8b:aa:28:1d:4b:60:49:0e:82:0d:d1:e9:f9:ef
Signer

Actual PE Digest

05:cb:25:83:78:17:f1:f6:8c:4a:25:38:d8:4b:5b:37:78:68:8b:aa:28:1d:4b:60:49:0e:82:0d:d1:e9:f9:ef

Digest Algorithm

sha256

PE Digest Matches

true

Signature Validations

Trusted

false

Verification

Signing Certificate

CN=Microsoft Windows Publisher,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

20-01-2023 15:46
Valid: false

Headers

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_GUARD_CF

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LARGE_ADDRESS_AWARE

Imports

ntdll

NtSetInformationProcess
RtlSetHeapInformation
NtTerminateProcess
RtlSetUnhandledExceptionFilter
RtlLookupFunctionEntry
RtlVirtualUnwind
RtlUnhandledExceptionFilter
RtlUnicodeStringToAnsiString
NtTerminateThread
RtlCaptureContext
RtlFreeAnsiString
RtlAllocateHeap
RtlNormalizeProcessParams
isspace

csrsrv

CsrUnhandledExceptionFilter
CsrServerInitialization

Sections

.text
Size: 4KB - Virtual size: 1KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rdata
Size: 4KB - Virtual size: 2KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.data
Size: 4KB - Virtual size: 1KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.pdata
Size: 4KB - Virtual size: 120B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.rsrc
Size: 4KB - Virtual size: 2KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

.reloc
Size: 4KB - Virtual size: 40B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

a96fa9912e09e361274ad77f1a4b252c

Code Sign

33:00:00:03:72:31:35:9d:93:ab:3e:7b:1a:00:00:00:00:03:72Certificate

Extended Key Usages

61:07:76:56:00:00:00:00:00:08Certificate

Key Usages

05:cb:25:83:78:17:f1:f6:8c:4a:25:38:d8:4b:5b:37:78:68:8b:aa:28:1d:4b:60:49:0e:82:0d:d1:e9:f9:efSigner

Signature Validations

Verification

20-01-2023 15:46 Valid: false

Headers

DLL Characteristics

File Characteristics

Imports

ntdll

csrsrv

Sections

.text Size: 4KB - Virtual size: 1KB

.rdata Size: 4KB - Virtual size: 2KB

.data Size: 4KB - Virtual size: 1KB

.pdata Size: 4KB - Virtual size: 120B

.rsrc Size: 4KB - Virtual size: 2KB

.reloc Size: 4KB - Virtual size: 40B

33:00:00:03:72:31:35:9d:93:ab:3e:7b:1a:00:00:00:00:03:72
Certificate

61:07:76:56:00:00:00:00:00:08
Certificate

05:cb:25:83:78:17:f1:f6:8c:4a:25:38:d8:4b:5b:37:78:68:8b:aa:28:1d:4b:60:49:0e:82:0d:d1:e9:f9:ef
Signer

20-01-2023 15:46
Valid: false

.text
Size: 4KB - Virtual size: 1KB

.rdata
Size: 4KB - Virtual size: 2KB

.data
Size: 4KB - Virtual size: 1KB

.pdata
Size: 4KB - Virtual size: 120B

.rsrc
Size: 4KB - Virtual size: 2KB

.reloc
Size: 4KB - Virtual size: 40B