zlib1[.]dll | Triage

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General

Target

zlib1.dll
Size

113KB
MD5

75365924730b0b2c1a6ee9028ef07685
SHA1

a10687c37deb2ce5422140b541a64ac15534250f
SHA256

945e7f5d09938b7769a4e68f4ef01406e5af9f40db952cba05ddb3431dd1911b
SHA512

c1e31c18903e657203ae847c9af601b1eb38efa95cb5fa7c1b75f84a2cba9023d08f1315c9bb2d59b53256dfdb3bac89930252138475491b21749471adc129a1
SSDEEP

3072:wsuxy/bjdeT1dtDCV8SSsfj7cTpHTBfQjxcHE2Fl:wsZ/bRe5PDCV8SLfcFTBIjxyE2Fl

Score

3^/10

Malware Config

Signatures

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
zlib1.dll

Files

zlib1.dll
.dll windows:4 windows x64 arch:x64

9434905d51e7bf5f119cc9e5ee85d0da

Headers

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LINE_NUMS_STRIPPED
IMAGE_FILE_LARGE_ADDRESS_AWARE
IMAGE_FILE_DEBUG_STRIPPED
IMAGE_FILE_DLL

Imports

kernel32

DeleteCriticalSection
EnterCriticalSection
GetLastError
InitializeCriticalSection
IsDBCSLeadByteEx
LeaveCriticalSection
MultiByteToWideChar
Sleep
TlsGetValue
VirtualProtect
VirtualQuery
WideCharToMultiByte

msvcrt

___lc_codepage_func
___mb_cur_max_func
__iob_func
_amsg_exit
_close
_errno
_initterm
_lock
_lseek
_open
_read
_unlock
_wopen
_write
abort
calloc
fputc
free
fwrite
localeconv
malloc
memchr
memcpy
memset
realloc
strerror
strlen
strncmp
vfprintf
wcslen
wcstombs

Exports

Exports

_dist_code
_length_code
_tr_align
_tr_flush_bits
_tr_flush_block
_tr_init
_tr_stored_block
_tr_tally
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
deflate_copyright
get_crc_table
gz_error
gzbuffer
gzclearerr
gzclose
gzclose_r
gzclose_w
gzdirect
gzdopen
gzeof
gzerror
gzflush
gzfread
gzfwrite
gzgetc
gzgetc_
gzgets
gzoffset
gzoffset64
gzopen
gzopen64
gzopen_w
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
inflate_copyright
inflate_fast
inflate_table
uncompress
uncompress2
zError
z_errmsg
zcalloc
zcfree
zlibCompileFlags
zlibVersion

Sections

.text
Size: 77KB - Virtual size: 77KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.data
Size: 512B - Virtual size: 160B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.rdata
Size: 21KB - Virtual size: 21KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.pdata
Size: 3KB - Virtual size: 2KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

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

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.bss
Size: - Virtual size: 2KB

IMAGE_SCN_CNT_UNINITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

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

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

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

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.CRT
Size: 512B - Virtual size: 88B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.tls
Size: 512B - Virtual size: 16B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.reloc
Size: 512B - Virtual size: 176B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

9434905d51e7bf5f119cc9e5ee85d0da

Headers

DLL Characteristics

File Characteristics

Imports

kernel32

msvcrt

Exports

Exports

Sections

.text Size: 77KB - Virtual size: 77KB

.data Size: 512B - Virtual size: 160B

.rdata Size: 21KB - Virtual size: 21KB

.pdata Size: 3KB - Virtual size: 2KB

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

.bss Size: - Virtual size: 2KB

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

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

.CRT Size: 512B - Virtual size: 88B

.tls Size: 512B - Virtual size: 16B

.reloc Size: 512B - Virtual size: 176B

.text
Size: 77KB - Virtual size: 77KB

.data
Size: 512B - Virtual size: 160B

.rdata
Size: 21KB - Virtual size: 21KB

.pdata
Size: 3KB - Virtual size: 2KB

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

.bss
Size: - Virtual size: 2KB

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

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

.CRT
Size: 512B - Virtual size: 88B

.tls
Size: 512B - Virtual size: 16B

.reloc
Size: 512B - Virtual size: 176B