cygz[.]dll | Triage

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General

Target

cygz.dll
Size

343KB
MD5

b4c05ba3741bb5d170cb2ba8a7de5892
SHA1

0823b84084d1fe7ff6ba9f456d753eac099452c6
SHA256

de64edc1ccc0b894993efce603778963c0256d1f0c7e47cd3805df44ade0a4a4
SHA512

dc9b43a4bff7ea658d123e433872ba2b06699023cd0fb21bb3f6ee273896beb25c5a04176452e5dfce6f4a5a3bf37817470242cba4aa6d701f91d1a0cc7f3e1b
SSDEEP

6144:Lp1nBy0TBvvfzx4RWERm8x9NBzwfYu6hadbZzyRkZscFD:LpFBxTpvfzCRNR9xjVuYu6EbZzybcFD

Score

3^/10

Malware Config

Signatures

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
cygz.dll

Files

cygz.dll
.dll windows:4 windows x64 arch:x64

9b87dea50bee52badb0204e28adc7b75

Headers

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LINE_NUMS_STRIPPED
IMAGE_FILE_LARGE_ADDRESS_AWARE
IMAGE_FILE_DLL

Imports

cygwin1

__cxa_atexit
__errno
_impure_ptr
calloc
close
cygwin_detach_dll
cygwin_internal
dll_dllcrt0
free
lseek
malloc
memchr
memcpy
memset
open
posix_memalign
read
realloc
snprintf
strerror
strlen
vsnprintf
write

kernel32

GetModuleHandleA
GetProcAddress

Exports

Exports

adler32
adler32_combine
adler32_combine64
adler32_z
compress
compress2
compressBound
crc32
crc32_combine
crc32_combine64
crc32_z
deflate
deflateBound
deflateCopy
deflateEnd
deflateGetDictionary
deflateInit2_
deflateInit_
deflateParams
deflatePending
deflatePrime
deflateReset
deflateResetKeep
deflateSetDictionary
deflateSetHeader
deflateTune
get_crc_table
gzbuffer
gzclearerr
gzclose
gzclose_r
gzclose_w
gzdirect
gzdopen
gzeof
gzerror
gzflush
gzfread
gzfwrite
gzgetc
gzgetc_
gzgets
gzoffset
gzoffset64
gzopen
gzopen64
gzprintf
gzputc
gzputs
gzread
gzrewind
gzseek
gzseek64
gzsetparams
gztell
gztell64
gzungetc
gzvprintf
gzwrite
inflate
inflateBack
inflateBackEnd
inflateBackInit_
inflateCodesUsed
inflateCopy
inflateEnd
inflateGetDictionary
inflateGetHeader
inflateInit2_
inflateInit_
inflateMark
inflatePrime
inflateReset
inflateReset2
inflateResetKeep
inflateSetDictionary
inflateSync
inflateSyncPoint
inflateUndermine
inflateValidate
uncompress
uncompress2
zError
zlibCompileFlags
zlibVersion

Sections

.text
Size: 53KB - Virtual size: 52KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.data
Size: 512B - Virtual size: 104B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.rdata
Size: 20KB - Virtual size: 19KB

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: 2KB - Virtual size: 1KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

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

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.bss
Size: - Virtual size: 432B

IMAGE_SCN_CNT_UNINITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

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

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.idata
Size: 1024B - Virtual size: 948B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.rsrc
Size: 1024B - Virtual size: 912B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.reloc
Size: 512B - Virtual size: 112B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

/4
Size: 1024B - Virtual size: 752B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

/19
Size: 104KB - Virtual size: 103KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

/31
Size: 12KB - Virtual size: 12KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

/45
Size: 16KB - Virtual size: 15KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

/57
Size: 8KB - Virtual size: 8KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

/70
Size: 1024B - Virtual size: 1020B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

/81
Size: 86KB - Virtual size: 86KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

/92
Size: 5KB - Virtual size: 5KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

9b87dea50bee52badb0204e28adc7b75

Headers

File Characteristics

Imports

cygwin1

kernel32

Exports

Exports

Sections

.text Size: 53KB - Virtual size: 52KB

.data Size: 512B - Virtual size: 104B

.rdata Size: 20KB - Virtual size: 19KB

.buildid Size: 512B - Virtual size: 53B

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

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

.bss Size: - Virtual size: 432B

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

.idata Size: 1024B - Virtual size: 948B

.rsrc Size: 1024B - Virtual size: 912B

.reloc Size: 512B - Virtual size: 112B

/4 Size: 1024B - Virtual size: 752B

/19 Size: 104KB - Virtual size: 103KB

/31 Size: 12KB - Virtual size: 12KB

/45 Size: 16KB - Virtual size: 15KB

/57 Size: 8KB - Virtual size: 8KB

/70 Size: 1024B - Virtual size: 1020B

/81 Size: 86KB - Virtual size: 86KB

/92 Size: 5KB - Virtual size: 5KB

.text
Size: 53KB - Virtual size: 52KB

.data
Size: 512B - Virtual size: 104B

.rdata
Size: 20KB - Virtual size: 19KB

.buildid
Size: 512B - Virtual size: 53B

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

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

.bss
Size: - Virtual size: 432B

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

.idata
Size: 1024B - Virtual size: 948B

.rsrc
Size: 1024B - Virtual size: 912B

.reloc
Size: 512B - Virtual size: 112B

/4
Size: 1024B - Virtual size: 752B

/19
Size: 104KB - Virtual size: 103KB

/31
Size: 12KB - Virtual size: 12KB

/45
Size: 16KB - Virtual size: 15KB

/57
Size: 8KB - Virtual size: 8KB

/70
Size: 1024B - Virtual size: 1020B

/81
Size: 86KB - Virtual size: 86KB

/92
Size: 5KB - Virtual size: 5KB