Static task
static1
Behavioral task
behavioral1
Sample
cygwin1.dll
Resource
win7-20240221-en
windows7-x64
Behavioral task
behavioral2
Sample
cygwin1.dll
Resource
win10v2004-20240426-en
windows10-2004-x64
General
-
Target
cygwin1.dll.2
-
Size
3.4MB
-
MD5
cb4431ac57843710d283feff26873e09
-
SHA1
c4d781b1c44e6549b0e24e6f032d98a0126aeaad
-
SHA256
b66ac01ec679f36d4724a2df7607367f5837588ae466ca6569b27a1043eeb846
-
SHA512
15d5fa515951c506d621f084a5faad5cdb23782e221a1b74cf4e0fa2d0f46a03c2f7b7257eb8b677542225ca4e2d3bea55ac130b6d71e2298a324c5490e41df6
-
SSDEEP
98304:iyEnXw9DBuYfJd6qqe7gfXB4L1vgoFJvJaVr1u4CUKiMhy4vhAAxcRWo:ifmNfJd6y0/d
Malware Config
Signatures
-
Unsigned PE 1 IoCs
Checks for missing Authenticode signature.
resource cygwin1.dll.2
Files
-
cygwin1.dll.2.dll windows:4 windows x64 arch:x64
e49f2e55576255ce2892923d44184fd5
Headers
File Characteristics
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LINE_NUMS_STRIPPED
IMAGE_FILE_LARGE_ADDRESS_AWARE
IMAGE_FILE_DLL
PDB Paths
Imports
kernel32
AcquireSRWLockExclusive
AddVectoredContinueHandler
AllocConsole
AttachConsole
CallNamedPipeA
CancelIo
CancelSynchronousIo
ClearCommBreak
ClearCommError
CloseHandle
CompareStringW
ConnectNamedPipe
CreateFileA
CreateFileW
CreateNamedPipeA
CreatePipe
CreateProcessW
CreateRemoteThread
CreateSymbolicLinkW
CreateTapePartition
CreateThread
DebugBreak
DeleteCriticalSection
DeleteProcThreadAttributeList
DeviceIoControl
DisconnectNamedPipe
DuplicateHandle
EnterCriticalSection
EraseTape
EscapeCommFunction
ExitProcess
ExitThread
ExpandEnvironmentStringsW
FillConsoleOutputAttribute
FillConsoleOutputCharacterW
FindFirstVolumeW
FindNextVolumeW
FindVolumeClose
FlushConsoleInputBuffer
FlushFileBuffers
FlushViewOfFile
FreeConsole
FreeEnvironmentStringsW
FreeLibrary
GetBinaryTypeW
GetCommModemStatus
GetCommState
GetCommandLineW
GetConsoleCP
GetConsoleCursorInfo
GetConsoleMode
GetConsoleOutputCP
GetConsoleProcessList
GetConsoleScreenBufferInfo
GetConsoleWindow
GetCurrentConsoleFontEx
GetCurrentProcess
GetCurrentProcessId
GetCurrentProcessorNumber
GetCurrentThread
GetCurrentThreadId
GetEnvironmentStringsW
GetEnvironmentVariableA
GetEnvironmentVariableW
GetExitCodeProcess
GetExitCodeThread
GetFileAttributesA
GetFileSize
GetFileSizeEx
GetFileType
GetHandleInformation
GetLastError
GetLocaleInfoA
GetLocaleInfoW
GetLogicalDriveStringsA
GetLogicalDrives
GetModuleFileNameW
GetModuleHandleA
GetModuleHandleExA
GetModuleHandleExW
GetNamedPipeClientProcessId
GetNumberOfConsoleInputEvents
GetOverlappedResult
GetPriorityClass
GetProcAddress
GetProcessAffinityMask
GetProcessHeap
GetProcessWorkingSetSize
GetStartupInfoA
GetStdHandle
GetSystemDirectoryW
GetSystemInfo
GetSystemTimeAsFileTime
GetSystemWindowsDirectoryW
GetTapeParameters
GetTapePosition
GetTapeStatus
GetTempPathW
GetThreadContext
GetThreadId
GetThreadPriority
GetTickCount
GetTickCount64
GetTimeZoneInformation
GetVolumeNameForVolumeMountPointW
GetVolumePathNamesForVolumeNameW
GlobalAlloc
GlobalLock
GlobalMemoryStatusEx
GlobalSize
GlobalUnlock
HeapAlloc
HeapFree
IdnToAscii
IdnToUnicode
InitializeCriticalSection
InitializeProcThreadAttributeList
IsBadStringPtrA
IsDebuggerPresent
IsProcessInJob
LCMapStringW
LeaveCriticalSection
LoadLibraryExA
LoadLibraryExW
LoadLibraryW
LocalFree
LocaleNameToLCID
MapViewOfFile
MapViewOfFileEx
MultiByteToWideChar
OpenProcess
OpenThread
OutputDebugStringA
PeekConsoleInputA
PeekConsoleInputW
PeekNamedPipe
PrepareTape
PurgeComm
QueryDosDeviceW
QueryInformationJobObject
QueryPerformanceCounter
QueryPerformanceFrequency
QueueUserAPC
RaiseException
ReadConsoleA
ReadConsoleInputW
ReadConsoleOutputW
ReadFile
ReadProcessMemory
ReleaseMutex
ReleaseSRWLockExclusive
ReleaseSemaphore
ResetEvent
ResumeThread
RtlCaptureContext
RtlLookupFunctionEntry
RtlRestoreContext
RtlUnwindEx
RtlVirtualUnwind
ScrollConsoleScreenBufferA
ScrollConsoleScreenBufferW
SetCommBreak
SetCommMask
SetCommState
SetCommTimeouts
SetComputerNameExW
SetConsoleCP
SetConsoleCtrlHandler
SetConsoleCursorInfo
SetConsoleCursorPosition
SetConsoleMode
SetConsoleOutputCP
SetConsoleScreenBufferSize
SetConsoleTextAttribute
SetConsoleTitleW
SetConsoleWindowInfo
SetEnvironmentVariableW
SetErrorMode
SetEvent
SetFilePointerEx
SetHandleInformation
SetLastError
SetNamedPipeHandleState
SetPriorityClass
SetProcessAffinityMask
SetProcessWorkingSetSize
SetStdHandle
SetSystemTime
SetTapeParameters
SetTapePosition
SetThreadAffinityMask
SetThreadContext
SetThreadPriority
SetThreadStackGuarantee
Sleep
SuspendThread
SwitchToThread
TerminateProcess
TerminateThread
TlsAlloc
TlsFree
TlsGetValue
TlsSetValue
TransmitCommChar
UnmapViewOfFile
UpdateProcThreadAttribute
VirtualAlloc
VirtualFree
VirtualProtect
VirtualProtectEx
VirtualQuery
VirtualQueryEx
WaitCommEvent
WaitForMultipleObjects
WaitForSingleObject
WaitNamedPipeW
WideCharToMultiByte
WriteConsoleA
WriteConsoleOutputW
WriteConsoleW
WriteFile
WriteProcessMemory
WriteTapemark
ntdll
NtAccessCheck
NtAdjustPrivilegesToken
NtAllocateLocallyUniqueId
NtCancelTimer
NtClose
NtCommitTransaction
NtCreateDirectoryObject
NtCreateEvent
NtCreateFile
NtCreateKey
NtCreateMutant
NtCreateNamedPipeFile
NtCreateSection
NtCreateSemaphore
NtCreateSymbolicLinkObject
NtCreateTimer
NtCreateToken
NtCreateTransaction
NtDuplicateToken
NtFlushBuffersFile
NtFsControlFile
NtLockFile
NtLockVirtualMemory
NtMapViewOfSection
NtOpenDirectoryObject
NtOpenEvent
NtOpenFile
NtOpenKey
NtOpenMutant
NtOpenProcessToken
NtOpenSection
NtOpenSemaphore
NtOpenSymbolicLinkObject
NtOpenThreadToken
NtPrivilegeCheck
NtQueryAttributesFile
NtQueryDirectoryFile
NtQueryDirectoryObject
NtQueryEaFile
NtQueryEvent
NtQueryInformationFile
NtQueryInformationProcess
NtQueryInformationThread
NtQueryInformationToken
NtQueryObject
NtQueryQuotaInformationFile
NtQuerySecurityObject
NtQuerySemaphore
NtQuerySymbolicLinkObject
NtQuerySystemInformation
NtQuerySystemTime
NtQueryTimer
NtQueryTimerResolution
NtQueryValueKey
NtQueryVirtualMemory
NtQueryVolumeInformationFile
NtReadFile
NtRollbackTransaction
NtSetEaFile
NtSetEvent
NtSetInformationFile
NtSetInformationThread
NtSetInformationToken
NtSetQuotaInformationFile
NtSetSecurityObject
NtSetTimer
NtSetValueKey
NtSetVolumeInformationFile
NtUnlockFile
NtUnlockVirtualMemory
NtUnmapViewOfSection
NtWriteFile
RtlAbsoluteToSelfRelativeSD
RtlAddAccessAllowedAce
RtlAddAccessAllowedAceEx
RtlAddAccessDeniedAceEx
RtlAllocateHeap
RtlAppendUnicodeStringToString
RtlAppendUnicodeToString
RtlCheckRegistryKey
RtlCompareUnicodeString
RtlConvertSidToUnicodeString
RtlCopySid
RtlCopyUnicodeString
RtlCreateAcl
RtlCreateQueryDebugBuffer
RtlCreateSecurityDescriptor
RtlCreateUnicodeStringFromAsciiz
RtlDestroyQueryDebugBuffer
RtlDowncaseUnicodeString
RtlEnterCriticalSection
RtlEqualPrefixSid
RtlEqualSid
RtlEqualUnicodeString
RtlFirstFreeAce
RtlFreeHeap
RtlFreeUnicodeString
RtlGetAce
RtlGetControlSecurityDescriptor
RtlGetCurrentTransaction
RtlGetDaclSecurityDescriptor
RtlGetGroupSecurityDescriptor
RtlGetNtVersionNumbers
RtlGetOwnerSecurityDescriptor
RtlGetVersion
RtlIdentifierAuthoritySid
RtlInitAnsiString
RtlInitUnicodeString
RtlInitializeSid
RtlLeaveCriticalSection
RtlLengthSid
RtlNtStatusToDosError
RtlPrefixUnicodeString
RtlQueryProcessDebugInformation
RtlQueryRegistryValues
RtlSetControlSecurityDescriptor
RtlSetCurrentDirectory_U
RtlSetCurrentTransaction
RtlSetDaclSecurityDescriptor
RtlSetGroupSecurityDescriptor
RtlSetOwnerSecurityDescriptor
RtlSubAuthorityCountSid
RtlSubAuthoritySid
RtlUnicodeStringToAnsiString
RtlUpcaseUnicodeChar
RtlUpcaseUnicodeString
Exports
Exports
GetCommandLineA@0
GetCommandLineW@0
_Exit
__argc
__argv
__assert
__assert_func
__assertfail
__b64_ntop
__b64_pton
__bsd_qsort_r
__check_rhosts_file
__chk_fail
__ctype_ptr__
__cxa_atexit
__cxa_finalize
__cygwin_user_data
__dn_comp
__dn_expand
__dn_skipname
__eprintf
__errno
__fbufsize
__flbf
__fpclassifyd
__fpclassifyf
__fpending
__fpurge
__freadable
__freading
__fsetlocking
__fwritable
__fwriting
__getpagesize
__getreent
__gets_chk
__gnu_basename
__infinity
__isinfd
__isinff
__isnand
__isnanf
__locale_ctype_ptr
__locale_ctype_ptr_l
__locale_mb_cur_max
__main
__mb_cur_max
__memcpy_chk
__memmove_chk
__mempcpy
__mempcpy_chk
__memset_chk
__opendir_with_d_ino
__progname
__rcmd_errstr
__res_close
__res_init
__res_mkquery
__res_nclose
__res_ninit
__res_nmkquery
__res_nquery
__res_nquerydomain
__res_nsearch
__res_nsend
__res_query
__res_querydomain
__res_search
__res_send
__res_state
__sched_getaffinity_sys
__signbitd
__signbitf
__signgam
__snprintf_chk
__sprintf_chk
__srget
__srget_r
__stack_chk_fail
__stack_chk_fail_local
__stack_chk_guard
__stpcpy_chk
__stpncpy_chk
__strcat_chk
__strcpy_chk
__strncat_chk
__strncpy_chk
__swbuf
__swbuf_r
__vsnprintf_chk
__vsprintf_chk
__wrap__ZdaPv
__wrap__ZdaPvRKSt9nothrow_t
__wrap__ZdlPv
__wrap__ZdlPvRKSt9nothrow_t
__wrap__Znam
__wrap__ZnamRKSt9nothrow_t
__wrap__Znwm
__wrap__ZnwmRKSt9nothrow_t
__xdrrec_getrec
__xdrrec_setnonblock
__xpg_sigpause
__xpg_strerror_r
_alloca
_check_for_executable
_ctype_
_daylight
_dll_crt0
_exit
_fe_dfl_env
_fe_nomask_env
_feinitialise
_fscanf_r
_get_osfhandle
_impure_ptr
_longjmp
_pipe
_pthread_cleanup_pop
_pthread_cleanup_push
_setjmp
_setmode
_sys_errlist
_sys_nerr
_timezone
_tzname
a64l
abort
abs
accept
accept4
access
acl
acl_add_perm
acl_calc_mask
acl_check
acl_clear_perms
acl_cmp
acl_copy_entry
acl_copy_ext
acl_copy_int
acl_create_entry
acl_delete_def_file
acl_delete_entry
acl_delete_perm
acl_dup
acl_entries
acl_equiv_mode
acl_error
acl_extended_fd
acl_extended_file
acl_extended_file_nofollow
acl_free
acl_from_mode
acl_from_text
acl_get_entry
acl_get_fd
acl_get_file
acl_get_perm
acl_get_permset
acl_get_qualifier
acl_get_tag_type
acl_init
acl_set_fd
acl_set_file
acl_set_permset
acl_set_qualifier
acl_set_tag_type
acl_size
acl_to_any_text
acl_to_text
acl_valid
aclcheck
aclfrommode
aclfrompbits
aclfromtext
aclsort
acltomode
acltopbits
acltotext
acos
acosf
acosh
acoshf
acoshl
acosl
aio_cancel
aio_error
aio_fsync
aio_read
aio_return
aio_suspend
aio_write
alarm
aligned_alloc
alphasort
arc4random
arc4random_addrandom
arc4random_buf
arc4random_stir
arc4random_uniform
argz_add
argz_add_sep
argz_append
argz_count
argz_create
argz_create_sep
argz_delete
argz_extract
argz_insert
argz_next
argz_replace
argz_stringify
asctime
asctime_r
asin
asinf
asinh
asinhf
asinhl
asinl
asnprintf
asprintf
at_quick_exit
atan
atan2
atan2f
atan2l
atanf
atanh
atanhf
atanhl
atanl
atexit
atof
atoff
atoi
atol
atoll
basename
bcmp
bcopy
bind
bindresvport
bindresvport_sa
bsearch
btowc
bzero
cabs
cabsf
cabsl
cacos
cacosf
cacosh
cacoshf
cacoshl
cacosl
calloc
canonicalize_file_name
carg
cargf
cargl
casin
casinf
casinh
casinhf
casinhl
casinl
catan
catanf
catanh
catanhf
catanhl
catanl
catclose
catgets
catopen
cbrt
cbrtf
cbrtl
ccos
ccosf
ccosh
ccoshf
ccoshl
ccosl
ceil
ceilf
ceill
cexp
cexpf
cexpl
cfgetispeed
cfgetospeed
cfmakeraw
cfsetispeed
cfsetospeed
cfsetspeed
chdir
chmod
chown
chroot
cimag
cimagf
cimagl
cleanup_glue
clearenv
clearerr
clearerr_unlocked
clock
clock_getcpuclockid
clock_getres
clock_gettime
clock_nanosleep
clock_setres
clock_settime
clog
clog10
clog10f
clog10l
clogf
clogl
close
closedir
closelog
confstr
conj
conjf
conjl
connect
copysign
copysignf
copysignl
cos
cosf
cosh
coshf
coshl
cosl
cpow
cpowf
cpowl
cproj
cprojf
cprojl
creal
crealf
creall
creat
csin
csinf
csinh
csinhf
csinhl
csinl
csqrt
csqrtf
csqrtl
ctan
ctanf
ctanh
ctanhf
ctanhl
ctanl
ctermid
ctime
ctime_r
cuserid
cwait
cygwin_attach_handle_to_fd
cygwin_conv_path
cygwin_conv_path_list
cygwin_create_path
cygwin_detach_dll
cygwin_dll_init
cygwin_internal
cygwin_logon_user
cygwin_posix_path_list_p
cygwin_set_impersonation_token
cygwin_split_path
cygwin_stackdump
cygwin_umount
cygwin_winpid_to_pid
daemon
dbm_clearerr
dbm_close
dbm_delete
dbm_dirfno
dbm_error
dbm_fetch
dbm_firstkey
dbm_nextkey
dbm_open
dbm_store
difftime
dirfd
dirname
div
dladdr
dlclose
dlerror
dlfork
dll_crt0__FP11per_process
dll_dllcrt0
dll_entry
dlopen
dlsym
dn_comp
dn_expand
dn_skipname
dprintf
drand48
drem
dremf
dreml
dup
dup2
dup3
duplocale
eaccess
ecvt
ecvtbuf
ecvtf
endgrent
endhostent
endmntent
endprotoent
endpwent
endservent
endusershell
endutent
endutxent
environ
envz_add
envz_entry
envz_get
envz_merge
envz_remove
envz_strip
erand48
erf
erfc
erfcf
erfcl
erff
erfl
err
error
error_at_line
error_message_count
error_one_per_line
error_print_progname
errx
euidaccess
execl
execle
execlp
execv
execve
execvp
execvpe
exit
exp
exp10
exp10f
exp10l
exp2
exp2f
exp2l
expf
expl
explicit_bzero
expm1
expm1f
expm1l
fabs
fabsf
fabsl
faccessat
facl
fchdir
fchmod
fchmodat
fchown
fchownat
fclose
fcloseall
fcntl
fcvt
fcvtbuf
fcvtf
fdatasync
fdim
fdimf
fdiml
fdopen
fdopendir
feclearexcept
fedisableexcept
feenableexcept
fegetenv
Sections
.text Size: 1.9MB - Virtual size: 1.9MB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
/4 Size: 14KB - Virtual size: 14KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.data Size: 225KB - Virtual size: 225KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.rdata Size: 386KB - Virtual size: 386KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.buildid Size: 512B - Virtual size: 53B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.pdata Size: 68KB - Virtual size: 67KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.xdata Size: 68KB - Virtual size: 67KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.bss Size: - Virtual size: 223KB
IMAGE_SCN_CNT_UNINITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.edata Size: 35KB - Virtual size: 34KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.reloc Size: 22KB - Virtual size: 22KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
/19 Size: 49KB - Virtual size: 48KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.idata Size: 14KB - Virtual size: 14KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
/38 Size: 512B - Virtual size: 16B
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
IMAGE_SCN_MEM_WRITE
.cygheap Size: - Virtual size: 3.0MB
IMAGE_SCN_CNT_UNINITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE