yy2[.]rar | Triage

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General

Target

yy2.rar
Size

505KB
MD5

a72c14a49d0675d4358e2d356f0f80c0
SHA1

68f9c602515a892aa8e51bf61a573348c4027098
SHA256

cc565361d32d57528047e414f50e56315c1142fa86577b106b590b19b2aaa41d
SHA512

c3df98627c3bca107351104cbdd799f5c487fe30ab85271ffbfc5deb8f7765b28e22ce68c453faeb74ffbf99dee93f6c5297b734a71a6513af093216055b757f
SSDEEP

12288:eTlhh8Py2TcNfmSebTYH9mPs3TIp5oK3LHCVYnh92oUqj7y7n6N7r:eOq2TYebrs3spuCL92ou6N/

Score

3^/10

Malware Config

Signatures

Unsigned PE 2 IoCs

Checks for missing Authenticode signature.

resource
unpack001/yy2.dll
unpack001/yy2.exe

Files

yy2.rar
.rar
config.txt
config1.txt
runtimes/win/lib/net8.0/System.Management.dll
.dll windows:4 windows x86 arch:x86

dae02f32a21e03ce65412f6e56942daa

Code Sign

33:00:00:03:7b:a1:0a:3e:cb:66:e9:01:c0:00:00:00:00:03:7b
Certificate

Issuer

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

Not Before

11/05/2023, 19:03

Not After

08/05/2024, 19:03

Subject

CN=.NET,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

49:77:8d:dc:15:13:5f:8d:f7:74:af:cd:a0:90:66:08:03:f3:bf:ee:4b:1b:24:2b:69:b4:8c:4e:9f:11:64:aa
Signer

Actual PE Digest

49:77:8d:dc:15:13:5f:8d:f7:74:af:cd:a0:90:66:08:03:f3:bf:ee:4b:1b:24:2b:69:b4:8c:4e:9f:11:64:aa

Digest Algorithm

sha256

PE Digest Matches

true

Headers

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_NO_SEH
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LARGE_ADDRESS_AWARE
IMAGE_FILE_DLL

PDB Paths

/_/artifacts/obj/System.Management/Release/net8.0-windows/System.Management.pdb

Imports

mscoree

_CorDllMain

Sections

.text
Size: 291KB - Virtual size: 291KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rsrc
Size: 2KB - Virtual size: 1KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.reloc
Size: 512B - Virtual size: 12B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
yy2.deps.json
yy2.dll
.exe windows:4 windows x86 arch:x86

f34d5f2d4577ed6d9ceec516c1f5a744

Headers

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_NO_SEH
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LINE_NUMS_STRIPPED
IMAGE_FILE_LOCAL_SYMS_STRIPPED
IMAGE_FILE_LARGE_ADDRESS_AWARE
IMAGE_FILE_32BIT_MACHINE

Imports

mscoree

_CorExeMain

Sections

.text
Size: 342KB - Virtual size: 342KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rsrc
Size: 1KB - Virtual size: 1KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.reloc
Size: 512B - Virtual size: 12B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
yy2.exe
.exe windows:6 windows x64 arch:x64

5c16479801aac25e19e4d3e71f54842d

Headers

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_GUARD_CF
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LARGE_ADDRESS_AWARE

PDB Paths

D:\a\_work\1\s\artifacts\obj\win-x64.Release\corehost\apphost\standalone\apphost.pdb

Imports

kernel32

FreeLibrary
LoadLibraryExW
OutputDebugStringW
FindFirstFileExW
EnterCriticalSection
GetFullPathNameW
FindNextFileW
GetCurrentProcess
GetModuleHandleExW
GetModuleFileNameW
LeaveCriticalSection
GetEnvironmentVariableW
GetModuleHandleW
MultiByteToWideChar
GetFileAttributesExW
LoadLibraryA
DeleteCriticalSection
WideCharToMultiByte
IsWow64Process
TlsFree
TlsSetValue
TlsGetValue
TlsAlloc
InitializeCriticalSectionAndSpinCount
GetProcAddress
GetWindowsDirectoryW
FindResourceW
GetLastError
ActivateActCtx
FindClose
CreateActCtxW
SetLastError
RaiseException
RtlPcToFileHeader
RtlUnwindEx
InitializeSListHead
GetCurrentProcessId
IsDebuggerPresent
IsProcessorFeaturePresent
TerminateProcess
SetUnhandledExceptionFilter
UnhandledExceptionFilter
RtlVirtualUnwind
RtlLookupFunctionEntry
RtlCaptureContext
GetStringTypeW
SwitchToThread
GetCurrentThreadId
InitializeCriticalSectionEx
EncodePointer
DecodePointer
LCMapStringEx
QueryPerformanceCounter
GetSystemTimeAsFileTime

user32

MessageBoxW

shell32

ShellExecuteW

advapi32

RegOpenKeyExW
RegGetValueW
DeregisterEventSource
RegisterEventSourceW
ReportEventW
RegCloseKey

api-ms-win-crt-runtime-l1-1-0

_invalid_parameter_noinfo_noreturn
_initialize_onexit_table
_crt_atexit
_cexit
_seh_filter_exe
_set_app_type
_exit
__p___argc
__p___wargv
_c_exit
_errno
_register_thread_local_exe_atexit_callback
exit
_configure_wide_argv
abort
_initterm_e
_initterm
_initialize_wide_environment
_get_initial_wide_environment
terminate
_register_onexit_function

api-ms-win-crt-stdio-l1-1-0

__p__commode
setvbuf
__stdio_common_vswprintf
_set_fmode
__stdio_common_vfwprintf
fflush
__stdio_common_vsnwprintf_s
_wfsopen
fputws
fputwc
__acrt_iob_func

api-ms-win-crt-heap-l1-1-0

free
_set_new_mode
malloc
calloc
_callnewh

api-ms-win-crt-string-l1-1-0

strcpy_s
wcsncmp
toupper
wcsnlen
_wcsdup

api-ms-win-crt-convert-l1-1-0

wcstoul
_wtoi

api-ms-win-crt-time-l1-1-0

_gmtime64_s
wcsftime
_time64

api-ms-win-crt-locale-l1-1-0

___mb_cur_max_func
___lc_codepage_func
___lc_locale_name_func
_configthreadlocale
setlocale
_unlock_locales
_lock_locales
__pctype_func

api-ms-win-crt-math-l1-1-0

__setusermatherr

Sections

.text
Size: 88KB - Virtual size: 88KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rdata
Size: 37KB - Virtual size: 37KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.data
Size: 2KB - Virtual size: 5KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.pdata
Size: 5KB - Virtual size: 4KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

_RDATA
Size: 512B - Virtual size: 348B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.reloc
Size: 1024B - Virtual size: 792B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

.rsrc
Size: 1KB - Virtual size: 1KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
yy2.pdb
yy2.runtimeconfig.json

Sharing

General

Malware Config

Signatures

Files

dae02f32a21e03ce65412f6e56942daa

Code Sign

33:00:00:03:7b:a1:0a:3e:cb:66:e9:01:c0:00:00:00:00:03:7bCertificate

Extended Key Usages

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

Key Usages

49:77:8d:dc:15:13:5f:8d:f7:74:af:cd:a0:90:66:08:03:f3:bf:ee:4b:1b:24:2b:69:b4:8c:4e:9f:11:64:aaSigner

Headers

DLL Characteristics

File Characteristics

PDB Paths

Imports

mscoree

Sections

.text Size: 291KB - Virtual size: 291KB

.rsrc Size: 2KB - Virtual size: 1KB

.reloc Size: 512B - Virtual size: 12B

f34d5f2d4577ed6d9ceec516c1f5a744

Headers

DLL Characteristics

File Characteristics

Imports

mscoree

Sections

.text Size: 342KB - Virtual size: 342KB

.rsrc Size: 1KB - Virtual size: 1KB

.reloc Size: 512B - Virtual size: 12B

5c16479801aac25e19e4d3e71f54842d

Headers

DLL Characteristics

File Characteristics

PDB Paths

Imports

kernel32

user32

shell32

advapi32

api-ms-win-crt-runtime-l1-1-0

api-ms-win-crt-stdio-l1-1-0

api-ms-win-crt-heap-l1-1-0

api-ms-win-crt-string-l1-1-0

api-ms-win-crt-convert-l1-1-0

api-ms-win-crt-time-l1-1-0

api-ms-win-crt-locale-l1-1-0

api-ms-win-crt-math-l1-1-0

Sections

.text Size: 88KB - Virtual size: 88KB

.rdata Size: 37KB - Virtual size: 37KB

.data Size: 2KB - Virtual size: 5KB

.pdata Size: 5KB - Virtual size: 4KB

_RDATA Size: 512B - Virtual size: 348B

.reloc Size: 1024B - Virtual size: 792B

.rsrc Size: 1KB - Virtual size: 1KB

33:00:00:03:7b:a1:0a:3e:cb:66:e9:01:c0:00:00:00:00:03:7b
Certificate

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

49:77:8d:dc:15:13:5f:8d:f7:74:af:cd:a0:90:66:08:03:f3:bf:ee:4b:1b:24:2b:69:b4:8c:4e:9f:11:64:aa
Signer

.text
Size: 291KB - Virtual size: 291KB

.rsrc
Size: 2KB - Virtual size: 1KB

.reloc
Size: 512B - Virtual size: 12B

.text
Size: 342KB - Virtual size: 342KB

.rsrc
Size: 1KB - Virtual size: 1KB

.reloc
Size: 512B - Virtual size: 12B

.text
Size: 88KB - Virtual size: 88KB

.rdata
Size: 37KB - Virtual size: 37KB

.data
Size: 2KB - Virtual size: 5KB

.pdata
Size: 5KB - Virtual size: 4KB

_RDATA
Size: 512B - Virtual size: 348B

.reloc
Size: 1024B - Virtual size: 792B

.rsrc
Size: 1KB - Virtual size: 1KB