zlib1[.]dll | Triage

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General

Target

zlib1.dll
Size

105KB
MD5

b8a9e91134e7c89440a0f95470d5e47b
SHA1

3cbcee30fc0a7e9807931bc0dafceb627042bfc9
SHA256

42967a768f341d9ce5174eb38a4d63754c3c41739e7d88f4e39cd7354c1fac71
SHA512

e8583ea94b9d1321889359317e367abc88e90e96d0d9243258244a527ffa2b13ab97d0787693ca328960ceb934ea11eefd14abafd640a654473c26e420d2ec54
SSDEEP

3072:Y15jVjUqf9CtXH/4UghkGTBfmJyqLEC9BRY:Yf81wpTB+Jyqb

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

Password: www.mysoftwarefree.com

fd348b107c9a12537c4d666dc366ec5f

Headers

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LINE_NUMS_STRIPPED
IMAGE_FILE_LOCAL_SYMS_STRIPPED
IMAGE_FILE_32BIT_MACHINE
IMAGE_FILE_DEBUG_STRIPPED
IMAGE_FILE_DLL

Imports

kernel32

DeleteCriticalSection
EnterCriticalSection
GetCurrentProcess
GetCurrentProcessId
GetCurrentThreadId
GetLastError
GetModuleHandleA
GetProcAddress
GetSystemTimeAsFileTime
GetTickCount
InitializeCriticalSection
IsDBCSLeadByteEx
LeaveCriticalSection
LoadLibraryW
MultiByteToWideChar
QueryPerformanceCounter
SetUnhandledExceptionFilter
Sleep
TerminateProcess
TlsGetValue
UnhandledExceptionFilter
VirtualProtect
VirtualQuery
WideCharToMultiByte

msvcrt

_close
_open
_read
_write
__dllonexit
__mb_cur_max
_amsg_exit
_errno
_initterm
_iob
_lock
_lseeki64
_onexit
_unlock
_vsnprintf
_wopen
abort
atoi
calloc
fputc
free
getenv
localeconv
malloc
memchr
memcpy
memset
setlocale
strchr
strerror
strlen
strncmp
wcslen
wcstombs

Exports

Exports

adler32
adler32_combine
adler32_combine64
compress
compress2
compressBound
crc32
crc32_combine
crc32_combine64
deflate
deflateBound
deflateCopy
deflateEnd
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
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_
inflateCopy
inflateEnd
inflateGetDictionary
inflateGetHeader
inflateInit2_
inflateInit_
inflateMark
inflatePrime
inflateReset
inflateReset2
inflateResetKeep
inflateSetDictionary
inflateSync
inflateSyncPoint
inflateUndermine
uncompress
zError
zlibCompileFlags
zlibVersion

Sections

.text
Size: 76KB - Virtual size: 76KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.data
Size: 512B - Virtual size: 128B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.rdata
Size: 19KB - Virtual size: 18KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.bss
Size: - Virtual size: 3KB

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: 2KB - Virtual size: 1KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.CRT
Size: 512B - Virtual size: 44B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.tls
Size: 512B - Virtual size: 32B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.rsrc
Size: 1024B - Virtual size: 900B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

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

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

Password: www.mysoftwarefree.com

fd348b107c9a12537c4d666dc366ec5f

Headers

File Characteristics

Imports

kernel32

msvcrt

Exports

Exports

Sections

.text Size: 76KB - Virtual size: 76KB

.data Size: 512B - Virtual size: 128B

.rdata Size: 19KB - Virtual size: 18KB

.bss Size: - Virtual size: 3KB

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

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

.CRT Size: 512B - Virtual size: 44B

.tls Size: 512B - Virtual size: 32B

.rsrc Size: 1024B - Virtual size: 900B

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

.text
Size: 76KB - Virtual size: 76KB

.data
Size: 512B - Virtual size: 128B

.rdata
Size: 19KB - Virtual size: 18KB

.bss
Size: - Virtual size: 3KB

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

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

.CRT
Size: 512B - Virtual size: 44B

.tls
Size: 512B - Virtual size: 32B

.rsrc
Size: 1024B - Virtual size: 900B

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