Skype-8[.]88[.]0[.]401[.]exe

Resubmissions

31-10-2022 13:00

221031-p8sa3sahh7 8

31-10-2022 12:40

221031-pv9yzaahf9 8

27-09-2022 19:25

220927-x49nkafddn 10

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General

Target

Skype-8.88.0.401.exe
Size

84.6MB
MD5

a354d5d832f5a63c996be3ba24f3793c
SHA1

0eeabbd3654bcb95615ede909eca7f1d8cb1465e
SHA256

bd4ed965fbab660df571953482137e91a5af1a23c8a471b583d87e65266f64b2
SHA512

f745d04cae393227b344c4fe4ba1d9bdc36058527c1621fd38d19ccc6bdeb15dd4251e66e6db9a88ec41dd59ddf3de357920e58980ca089119416d92c9fc90fc
SSDEEP

1572864:KuEsMZ2eMCgMHNRZzU9P9X6TalSU3OTW+CnamF+U4wYVcnywmh0yyHXFK9auqj:KeM0MNQ6Ty3a3CT+amdwq0yyHXFoqj

Score

N/A

Malware Config

Signatures

Files

Skype-8.88.0.401.exe
.exe windows x86

20dd26497880c05caed9305b3c8b9109

Code Sign

33:00:00:02:9b:13:02:82:8f:f3:90:4e:d2:00:00:00:00:02:9b
Certificate

Issuer

CN=Microsoft Code Signing PCA 2011,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

Not Before

27-01-2022 19:36

Not After

26-01-2023 19:36

Subject

CN=Skype Software Sarl,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

Extended Key Usages

ExtKeyUsageCodeSigning

61:0e:90:d2:00:00:00:00:00:03
Certificate

Issuer

CN=Microsoft Root Certificate Authority 2011,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

Not Before

08-07-2011 20:59

Not After

08-07-2026 21:09

Subject

CN=Microsoft Code Signing PCA 2011,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

Key Usages

KeyUsageDigitalSignature
KeyUsageCertSign
KeyUsageCRLSign

16:52:8d:56:81:d1:df:1a:6f:1b:e1:4c:19:aa:03:55:98:39:42:5e:88:54:a6:f3:5f:1b:09:50:4e:eb:0d:5e
Signer

Actual PE Digest

16:52:8d:56:81:d1:df:1a:6f:1b:e1:4c:19:aa:03:55:98:39:42:5e:88:54:a6:f3:5f:1b:09:50:4e:eb:0d:5e

Digest Algorithm

sha256

PE Digest Matches

true

Signature Validations

Trusted

false

Verification

Signing Certificate

CN=Skype Software Sarl,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

23-09-2022 10:36
Valid: false

Headers

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE

File Characteristics

IMAGE_FILE_RELOCS_STRIPPED
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LINE_NUMS_STRIPPED
IMAGE_FILE_LOCAL_SYMS_STRIPPED
IMAGE_FILE_BYTES_REVERSED_LO
IMAGE_FILE_32BIT_MACHINE
IMAGE_FILE_BYTES_REVERSED_HI

Imports

oleaut32

SysFreeString
SysReAllocStringLen
SysAllocStringLen

advapi32

RegQueryValueExW
RegOpenKeyExW
RegCloseKey
RegQueryValueExW
RegOpenKeyExW
RegCloseKey
OpenProcessToken
LookupPrivilegeValueW
AdjustTokenPrivileges

user32

GetKeyboardType
LoadStringW
MessageBoxA
CharNextW
CreateWindowExW
TranslateMessage
SetWindowLongW
PeekMessageW
MsgWaitForMultipleObjects
MessageBoxW
LoadStringW
GetSystemMetrics
ExitWindowsEx
DispatchMessageW
DestroyWindow
CharUpperBuffW
CallWindowProcW

kernel32

GetACP
Sleep
VirtualFree
VirtualAlloc
GetSystemInfo
GetTickCount
QueryPerformanceCounter
GetVersion
GetCurrentThreadId
VirtualQuery
WideCharToMultiByte
MultiByteToWideChar
lstrlenW
lstrcpynW
LoadLibraryExW
GetThreadLocale
GetStartupInfoA
GetProcAddress
GetModuleHandleW
GetModuleFileNameW
GetLocaleInfoW
GetCommandLineW
FreeLibrary
FindFirstFileW
FindClose
ExitProcess
WriteFile
UnhandledExceptionFilter
RtlUnwind
RaiseException
GetStdHandle
CloseHandle
TlsSetValue
TlsGetValue
LocalAlloc
GetModuleHandleW
WriteFile
WideCharToMultiByte
WaitForSingleObject
VirtualQuery
VirtualProtect
VirtualFree
VirtualAlloc
SizeofResource
SignalObjectAndWait
SetLastError
SetFilePointer
SetEvent
SetErrorMode
SetEndOfFile
ResetEvent
RemoveDirectoryW
ReadFile
MultiByteToWideChar
LockResource
LoadResource
LoadLibraryW
GetWindowsDirectoryW
GetVersionExW
GetVersion
GetUserDefaultLangID
GetThreadLocale
GetSystemInfo
GetSystemDirectoryW
GetStdHandle
GetProcAddress
GetModuleHandleW
GetModuleFileNameW
GetLocaleInfoW
GetLastError
GetFullPathNameW
GetFileSize
GetFileAttributesW
GetExitCodeProcess
GetEnvironmentVariableW
GetDiskFreeSpaceW
GetCurrentProcess
GetCommandLineW
GetCPInfo
InterlockedExchange
InterlockedCompareExchange
FreeLibrary
FormatMessageW
FindResourceW
EnumCalendarInfoW
DeleteFileW
CreateProcessW
CreateFileW
CreateEventW
CreateDirectoryW
CloseHandle
Sleep

comctl32

InitCommonControls

Sections

.text
Size: 61KB - Virtual size: 60KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.itext
Size: 4KB - Virtual size: 3KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.data
Size: 3KB - Virtual size: 3KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.bss
Size: - Virtual size: 21KB

IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.idata
Size: 4KB - Virtual size: 3KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.tls
Size: - Virtual size: 8B

IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.rdata
Size: 512B - Virtual size: 24B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.rsrc
Size: 321KB - Virtual size: 320KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

Resubmissions

Sharing

General

Malware Config

Signatures

Files

20dd26497880c05caed9305b3c8b9109

Code Sign

33:00:00:02:9b:13:02:82:8f:f3:90:4e:d2:00:00:00:00:02:9bCertificate

Extended Key Usages

61:0e:90:d2:00:00:00:00:00:03Certificate

Key Usages

16:52:8d:56:81:d1:df:1a:6f:1b:e1:4c:19:aa:03:55:98:39:42:5e:88:54:a6:f3:5f:1b:09:50:4e:eb:0d:5eSigner

Signature Validations

Verification

23-09-2022 10:36 Valid: false

Headers

DLL Characteristics

File Characteristics

Imports

oleaut32

advapi32

user32

kernel32

comctl32

Sections

.text Size: 61KB - Virtual size: 60KB

.itext Size: 4KB - Virtual size: 3KB

.data Size: 3KB - Virtual size: 3KB

.bss Size: - Virtual size: 21KB

.idata Size: 4KB - Virtual size: 3KB

.tls Size: - Virtual size: 8B

.rdata Size: 512B - Virtual size: 24B

.rsrc Size: 321KB - Virtual size: 320KB

33:00:00:02:9b:13:02:82:8f:f3:90:4e:d2:00:00:00:00:02:9b
Certificate

61:0e:90:d2:00:00:00:00:00:03
Certificate

16:52:8d:56:81:d1:df:1a:6f:1b:e1:4c:19:aa:03:55:98:39:42:5e:88:54:a6:f3:5f:1b:09:50:4e:eb:0d:5e
Signer

23-09-2022 10:36
Valid: false

.text
Size: 61KB - Virtual size: 60KB

.itext
Size: 4KB - Virtual size: 3KB

.data
Size: 3KB - Virtual size: 3KB

.bss
Size: - Virtual size: 21KB

.idata
Size: 4KB - Virtual size: 3KB

.tls
Size: - Virtual size: 8B

.rdata
Size: 512B - Virtual size: 24B

.rsrc
Size: 321KB - Virtual size: 320KB