zlib1[.]dll | Triage

General

Target

zlib1.dll
Size

76KB
MD5

72e87ad407bb28f5b471c3396296b377
SHA1

15cd01170ff8d8531fb16f4f7a1c5fbe810a1057
SHA256

91ec6085e862e1eedc254bf88efecd4fa67f486216ab3b1473915d15462e71bb
SHA512

1569939514c0e30e2fbf7d81586ada53931ac36b11f306b95b5e0741c6b32c45d88d33271223c99cd4fbd585f0675d5188557e5dfe6901f9fbb2e3e8ec98a698
SSDEEP

768:bw6vENCUvhLcSCE/StC0KuFLRO5ZikoHBc1m7s4wixE+XwVY/nToIf18IOsIOIiy:bDvENBhA+WjPLAVY/nToIfCIOsIOIip

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 x86 arch:x86

9bf8c9ea52f2f2dcae9feb70c8257ba5

Headers

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_NO_SEH

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LINE_NUMS_STRIPPED
IMAGE_FILE_LOCAL_SYMS_STRIPPED
IMAGE_FILE_32BIT_MACHINE
IMAGE_FILE_DLL

PDB Paths

C:\Home\user\zlib-1.2.5\zlib1.pdb

Imports

msvcrt

strerror
_errno
memchr
_vsnprintf
_initterm
sprintf
free
_adjust_fdiv
malloc
_lseek
_open
_read
_close
_write

kernel32

Sleep
DisableThreadLibraryCalls

Exports

Exports

adler32
adler32_combine
compress
compress2
compressBound
crc32
crc32_combine
deflate
deflateBound
deflateCopy
deflateEnd
deflateInit2_
deflateInit_
deflateParams
deflatePrime
deflateReset
deflateSetDictionary
deflateSetHeader
deflateTune
get_crc_table
gzbuffer
gzclearerr
gzclose
gzclose_r
gzclose_w
gzdirect
gzdopen
gzeof
gzerror
gzflush
gzgetc
gzgets
gzoffset
gzopen
gzprintf
gzputc
gzputs
gzread
gzrewind
gzseek
gzsetparams
gztell
gzungetc
gzwrite
inflate
inflateBack
inflateBackEnd
inflateBackInit_
inflateCopy
inflateEnd
inflateGetHeader
inflateInit2_
inflateInit_
inflateMark
inflatePrime
inflateReset
inflateReset2
inflateSetDictionary
inflateSync
inflateSyncPoint
inflateUndermine
uncompress
zError
zlibCompileFlags
zlibVersion

Sections

.text
Size: 40KB - Virtual size: 39KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rdata
Size: 20KB - Virtual size: 18KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.data
Size: 4KB - Virtual size: 80B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.rsrc
Size: 4KB - Virtual size: 912B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.reloc
Size: 4KB - Virtual size: 922B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

9bf8c9ea52f2f2dcae9feb70c8257ba5

Headers

DLL Characteristics

File Characteristics

PDB Paths

Imports

msvcrt

kernel32

Exports

Exports

Sections

.text Size: 40KB - Virtual size: 39KB

.rdata Size: 20KB - Virtual size: 18KB

.data Size: 4KB - Virtual size: 80B

.rsrc Size: 4KB - Virtual size: 912B

.reloc Size: 4KB - Virtual size: 922B

.text
Size: 40KB - Virtual size: 39KB

.rdata
Size: 20KB - Virtual size: 18KB

.data
Size: 4KB - Virtual size: 80B

.rsrc
Size: 4KB - Virtual size: 912B

.reloc
Size: 4KB - Virtual size: 922B