yktdef[.]dll | Triage

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General

Target

yktdef.dll
Size

351KB
MD5

9e9986c789dbf9b6e8c562551f13931a
SHA1

4cb5cb33251ac3d450140df4901099a0b70ddaf5
SHA256

18689dced7a2bd32ff0b18ac5adad3d0fbdb0c5f58179f902ab864d4dbfce438
SHA512

40e1f638da12545aa11f2ff718f7db89482856ac97fd9fe61d7aa6b6a85b0d325260ac93cc5c52f86dff084bdff24256305b6c11584bbedd749539bf6551952f
SSDEEP

6144:esd+H21rsPYWb4IA3BCunm/8IMNMLKS1HAtn:vAH21HpIA5n+MNMLx1HS

Score

1^/10

Malware Config

Signatures

Files

yktdef.dll
.dll windows:4 windows x86 arch:x86

d7f57b2c26807598f860ae748293cecf

Code Sign

6e:a1:d4:94:5f:0e:69:e9:d6:f1:48:2c:58:6a:71:af
Certificate

Issuer

CN=Certum Trusted Network CA,OU=Certum Certification Authority,O=Unizeto Technologies S.A.,C=PL

Not Before

17-04-2018 08:20

Not After

18-05-2027 08:20

Subject

CN=WoTrus Code Signing CA,O=WoTrus CA Limited,C=CN

Extended Key Usages

ExtKeyUsageCodeSigning

Key Usages

KeyUsageCertSign
KeyUsageCRLSign

74:c9:0c:43:bb:5a:ba:7a:d3:64:6a:e3:a6:9e:c4:52
Certificate

Issuer

CN=WoTrus Code Signing CA,O=WoTrus CA Limited,C=CN

Not Before

17-05-2019 08:43

Not After

16-06-2020 08:43

Subject

CN=易联众智能（厦门）科技有限公司,O=易联众智能（厦门）科技有限公司,L=厦门市,ST=福建省,C=CN

Extended Key Usages

ExtKeyUsageCodeSigning

Key Usages

KeyUsageDigitalSignature

3d:1a:35:72:30:15:82:63:30:d0:13:71:7e:82:41:08
Certificate

Issuer

CN=Sectigo RSA Time Stamping CA,O=Sectigo Limited,L=Salford,ST=Greater Manchester,C=GB

Not Before

02-05-2019 00:00

Not After

01-08-2030 23:59

Subject

CN=Sectigo RSA Time Stamping Signer #1,O=Sectigo Limited,L=Salford,ST=Greater Manchester,C=GB

Extended Key Usages

ExtKeyUsageTimeStamping

Key Usages

KeyUsageDigitalSignature
KeyUsageContentCommitment

30:0f:6f:ac:dd:66:98:74:7c:a9:46:36:a7:78:2d:b9
Certificate

Issuer

CN=USERTrust RSA Certification Authority,O=The USERTRUST Network,L=Jersey City,ST=New Jersey,C=US

Not Before

02-05-2019 00:00

Not After

18-01-2038 23:59

Subject

CN=Sectigo RSA Time Stamping CA,O=Sectigo Limited,L=Salford,ST=Greater Manchester,C=GB

Extended Key Usages

ExtKeyUsageTimeStamping

Key Usages

KeyUsageDigitalSignature
KeyUsageCertSign
KeyUsageCRLSign

1c:54:f9:71:7d:74:5b:07:89:ac:79:f9:7e:36:47:1b:2e:12:64:2b:95:cd:f1:72:29:af:bd:ee:ce:b8:ec:ed
Signer

Actual PE Digest

1c:54:f9:71:7d:74:5b:07:89:ac:79:f9:7e:36:47:1b:2e:12:64:2b:95:cd:f1:72:29:af:bd:ee:ce:b8:ec:ed

Digest Algorithm

sha256

PE Digest Matches

true

Headers

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LINE_NUMS_STRIPPED
IMAGE_FILE_LOCAL_SYMS_STRIPPED
IMAGE_FILE_32BIT_MACHINE
IMAGE_FILE_DLL

Imports

kernel32

ReadFile
SetCommState
GetCommState
PurgeComm
GetModuleFileNameA
SetCommTimeouts
SetupComm
GetLastError
WriteFile
RaiseException
GetTickCount
Sleep
CreateFileA
CloseHandle
LoadLibraryA
GetOEMCP
GetACP
FlushFileBuffers
SetStdHandle
GetStringTypeW
HeapFree
HeapAlloc
InterlockedDecrement
InterlockedIncrement
GetCommandLineA
GetVersion
GetModuleHandleA
GetEnvironmentVariableA
GetVersionExA
HeapDestroy
HeapCreate
VirtualFree
VirtualAlloc
HeapReAlloc
InitializeCriticalSection
DeleteCriticalSection
EnterCriticalSection
LeaveCriticalSection
ExitProcess
RtlUnwind
WideCharToMultiByte
MultiByteToWideChar
LCMapStringA
LCMapStringW
SetHandleCount
GetStdHandle
GetFileType
GetStartupInfoA
SetFilePointer
GetProcAddress
GetCurrentThreadId
TlsSetValue
TlsAlloc
TlsFree
SetLastError
TlsGetValue
TerminateProcess
GetCurrentProcess
FreeEnvironmentStringsA
FreeEnvironmentStringsW
GetEnvironmentStrings
GetEnvironmentStringsW
GetCPInfo
GetStringTypeA

user32

UnregisterClassA
RegisterClassExA
CreateWindowExA
DefWindowProcA
DestroyWindow

hid

HidD_SetFeature
HidD_GetHidGuid
HidD_GetAttributes
HidD_GetFeature

setupapi

SetupDiGetClassDevsA
SetupDiEnumDeviceInterfaces
SetupDiGetDeviceInterfaceDetailA
SetupDiDestroyDeviceInfoList

shlwapi

PathRemoveFileSpecA

Exports

Exports

YKT_beep
YKT_defdata
YKT_exit
YKT_getver
YKT_init
YKT_readdevsnr

Sections

.text
Size: 44KB - Virtual size: 40KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rdata
Size: 8KB - Virtual size: 4KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.data
Size: 20KB - Virtual size: 25KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.rsrc
Size: 260KB - Virtual size: 256KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.reloc
Size: 8KB - Virtual size: 5KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

d7f57b2c26807598f860ae748293cecf

Code Sign

6e:a1:d4:94:5f:0e:69:e9:d6:f1:48:2c:58:6a:71:afCertificate

Extended Key Usages

Key Usages

74:c9:0c:43:bb:5a:ba:7a:d3:64:6a:e3:a6:9e:c4:52Certificate

Extended Key Usages

Key Usages

3d:1a:35:72:30:15:82:63:30:d0:13:71:7e:82:41:08Certificate

Extended Key Usages

Key Usages

30:0f:6f:ac:dd:66:98:74:7c:a9:46:36:a7:78:2d:b9Certificate

Extended Key Usages

Key Usages

1c:54:f9:71:7d:74:5b:07:89:ac:79:f9:7e:36:47:1b:2e:12:64:2b:95:cd:f1:72:29:af:bd:ee:ce:b8:ec:edSigner

Headers

File Characteristics

Imports

kernel32

user32

hid

setupapi

shlwapi

Exports

Exports

Sections

.text Size: 44KB - Virtual size: 40KB

.rdata Size: 8KB - Virtual size: 4KB

.data Size: 20KB - Virtual size: 25KB

.rsrc Size: 260KB - Virtual size: 256KB

.reloc Size: 8KB - Virtual size: 5KB

6e:a1:d4:94:5f:0e:69:e9:d6:f1:48:2c:58:6a:71:af
Certificate

74:c9:0c:43:bb:5a:ba:7a:d3:64:6a:e3:a6:9e:c4:52
Certificate

3d:1a:35:72:30:15:82:63:30:d0:13:71:7e:82:41:08
Certificate

30:0f:6f:ac:dd:66:98:74:7c:a9:46:36:a7:78:2d:b9
Certificate

1c:54:f9:71:7d:74:5b:07:89:ac:79:f9:7e:36:47:1b:2e:12:64:2b:95:cd:f1:72:29:af:bd:ee:ce:b8:ec:ed
Signer

.text
Size: 44KB - Virtual size: 40KB

.rdata
Size: 8KB - Virtual size: 4KB

.data
Size: 20KB - Virtual size: 25KB

.rsrc
Size: 260KB - Virtual size: 256KB

.reloc
Size: 8KB - Virtual size: 5KB