loader[.]zip | Triage

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General

Target

loader.zip
Size

28.4MB
MD5

3cccede8fc272e62dd6b7b9310265fa8
SHA1

a333bc73d3f079355462a16b1a6c1955ae6fbb69
SHA256

e835204f6c9646bcd6412b4055379bfb8b0119b2b74e87d21d0dc18caa47fe3d
SHA512

7920619fb1f2c6cbeb4012cdd768ec3fe19ed89ee2c73f97a752a3d7439cb1e05c7a305d3ad98fc52635393823d08ea53a1493ace0fd93ee8c2c5f193f1cebd4
SSDEEP

786432:zciR3O6KbHBnY+BmXPy8pJF69kt+ko1vSFybNMnMJv76EL:zcz6KbHxYhzpvks+9125MN5L

Score

3^/10

Malware Config

Signatures

Unsigned PE 3 IoCs

Checks for missing Authenticode signature.

resource
unpack001/loader/libcurl.dll
unpack001/loader/loader.exe
unpack001/loader/zlib1.dll

Files

loader.zip
.zip
loader/libcurl.dll
.dll windows:6 windows x64 arch:x64

27c45b3de2498d2adb3dd620312262d3

Headers

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LARGE_ADDRESS_AWARE
IMAGE_FILE_DLL

Imports

ws2_32

htonl
ioctlsocket
WSAWaitForMultipleEvents
WSASetEvent
WSAResetEvent
WSAEventSelect
WSAEnumNetworkEvents
WSACreateEvent
__WSAFDIsSet
listen
accept
gethostname
freeaddrinfo
getaddrinfo
inet_ntop
WSAIoctl
WSASetLastError
select
WSAStartup
WSACleanup
recvfrom
sendto
socket
getsockname
getpeername
connect
bind
WSAGetLastError
send
closesocket
WSACloseEvent
inet_pton
getsockopt
setsockopt
recv
ntohs
htons

bcrypt

BCryptGenRandom

zlib1

inflate
inflateEnd
inflateInit_
inflateInit2_
zlibVersion

advapi32

CryptAcquireContextW
CryptDestroyKey
CryptImportKey
CryptEncrypt
CryptGetHashParam
CryptCreateHash
CryptHashData
CryptDestroyHash
CryptReleaseContext

crypt32

CertFreeCertificateContext
CryptDecodeObjectEx
CertEnumCertificatesInStore
CertCloseStore
CertOpenStore
CryptStringToBinaryW
PFXImportCertStore
CertAddCertificateContextToStore
CertFindExtension
CertGetNameStringW
CryptQueryObject
CertCreateCertificateChainEngine
CertFreeCertificateChainEngine
CertGetCertificateChain
CertFindCertificateInStore
CertFreeCertificateChain

kernel32

GetModuleHandleW
GetSystemDirectoryW
QueryPerformanceFrequency
FormatMessageW
SetLastError
GetLastError
GetCurrentProcessId
MoveFileExW
Sleep
LoadLibraryW
AcquireSRWLockExclusive
ReleaseSRWLockExclusive
WaitForSingleObjectEx
CloseHandle
GetProcAddress
FreeLibrary
WideCharToMultiByte
MultiByteToWideChar
SleepEx
GetStdHandle
GetFileType
ReadFile
PeekNamedPipe
WaitForMultipleObjects
QueryPerformanceCounter
GetTickCount
VerSetConditionMask
GetModuleHandleA
CreateFileW
GetFileSizeEx
RtlCaptureContext
RtlLookupFunctionEntry
RtlVirtualUnwind
UnhandledExceptionFilter
SetUnhandledExceptionFilter
GetCurrentProcess
TerminateProcess
IsProcessorFeaturePresent
GetCurrentThreadId
GetSystemTimeAsFileTime
DisableThreadLibraryCalls
InitializeSListHead
IsDebuggerPresent
GetEnvironmentVariableA
VerifyVersionInfoW
EnterCriticalSection
LeaveCriticalSection
InitializeCriticalSectionEx
DeleteCriticalSection

vcruntime140

__std_type_info_destroy_list
__C_specific_handler
strstr
wcschr
memcmp
memchr
strrchr
memmove
strchr
memset
memcpy

api-ms-win-crt-string-l1-1-0

wcspbrk
strpbrk
strspn
wcsncmp
_strdup
strncmp
strcspn
wcsncpy
_wcsdup
strcmp
strncpy

api-ms-win-crt-stdio-l1-1-0

fflush
fputs
__stdio_common_vsscanf
_read
_fileno
ftell
__acrt_iob_func
fclose
__stdio_common_vsprintf
fputc
feof
_write
fgets
_wopen
_wfopen
_fseeki64
fread
_lseeki64
fwrite
fseek
_close

api-ms-win-crt-convert-l1-1-0

strtoul
strtoll
wcstombs
strtol
atoi

api-ms-win-crt-time-l1-1-0

_time64
_gmtime64
strftime

api-ms-win-crt-runtime-l1-1-0

__sys_nerr
_beginthreadex
_cexit
_execute_onexit_table
_initialize_onexit_table
_initialize_narrow_environment
_configure_narrow_argv
_seh_filter_dll
_initterm_e
_initterm
_errno
__sys_errlist

api-ms-win-crt-utility-l1-1-0

qsort

api-ms-win-crt-filesystem-l1-1-0

_waccess
_unlink
_wstat64
_fstat64

api-ms-win-crt-heap-l1-1-0

malloc
realloc
free
calloc

api-ms-win-crt-math-l1-1-0

_fdopen

Exports

Exports

curl_easy_cleanup
curl_easy_duphandle
curl_easy_escape
curl_easy_getinfo
curl_easy_header
curl_easy_init
curl_easy_nextheader
curl_easy_option_by_id
curl_easy_option_by_name
curl_easy_option_next
curl_easy_pause
curl_easy_perform
curl_easy_recv
curl_easy_reset
curl_easy_send
curl_easy_setopt
curl_easy_strerror
curl_easy_unescape
curl_easy_upkeep
curl_escape
curl_formadd
curl_formfree
curl_formget
curl_free
curl_getdate
curl_getenv
curl_global_cleanup
curl_global_init
curl_global_init_mem
curl_global_sslset
curl_global_trace
curl_maprintf
curl_mfprintf
curl_mime_addpart
curl_mime_data
curl_mime_data_cb
curl_mime_encoder
curl_mime_filedata
curl_mime_filename
curl_mime_free
curl_mime_headers
curl_mime_init
curl_mime_name
curl_mime_subparts
curl_mime_type
curl_mprintf
curl_msnprintf
curl_msprintf
curl_multi_add_handle
curl_multi_assign
curl_multi_cleanup
curl_multi_fdset
curl_multi_get_handles
curl_multi_info_read
curl_multi_init
curl_multi_perform
curl_multi_poll
curl_multi_remove_handle
curl_multi_setopt
curl_multi_socket
curl_multi_socket_action
curl_multi_socket_all
curl_multi_strerror
curl_multi_timeout
curl_multi_wait
curl_multi_wakeup
curl_mvaprintf
curl_mvfprintf
curl_mvprintf
curl_mvsnprintf
curl_mvsprintf
curl_pushheader_byname
curl_pushheader_bynum
curl_share_cleanup
curl_share_init
curl_share_setopt
curl_share_strerror
curl_slist_append
curl_slist_free_all
curl_strequal
curl_strnequal
curl_unescape
curl_url
curl_url_cleanup
curl_url_dup
curl_url_get
curl_url_set
curl_url_strerror
curl_version
curl_version_info
curl_ws_meta
curl_ws_recv
curl_ws_send

Sections

.text
Size: 392KB - Virtual size: 392KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rdata
Size: 101KB - Virtual size: 101KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.data
Size: 10KB - Virtual size: 11KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

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

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.rsrc
Size: 1KB - Virtual size: 1KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

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

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
loader/loader.exe
.exe windows:6 windows x64 arch:x64

bcb88a5e6d0958ea68f06943554c5bb3

Headers

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE

File Characteristics

IMAGE_FILE_RELOCS_STRIPPED
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LARGE_ADDRESS_AWARE

Imports

libcurl

curl_easy_cleanup

kernel32

K32GetDeviceDriverBaseNameA
GetSystemTimeAsFileTime
HeapAlloc
HeapFree
ExitProcess
LoadLibraryA
GetModuleHandleA
GetProcAddress

user32

SetClipboardData

gdi32

CreateCompatibleBitmap

advapi32

RegCloseKey

shell32

ShellExecuteA

winmm

PlaySoundA

imm32

ImmGetContext

msvcp140

??Bid@locale@std@@QEAA_KXZ

wininet

InternetReadFile

urlmon

UrlMkSetSessionOption

d3d9

Direct3DCreate9

vcruntime140_1

__CxxFrameHandler4

vcruntime140

strstr

api-ms-win-crt-stdio-l1-1-0

fseek

api-ms-win-crt-string-l1-1-0

strncpy

api-ms-win-crt-utility-l1-1-0

qsort

api-ms-win-crt-heap-l1-1-0

malloc

api-ms-win-crt-convert-l1-1-0

atoi

api-ms-win-crt-runtime-l1-1-0

_exit

api-ms-win-crt-filesystem-l1-1-0

rename

api-ms-win-crt-time-l1-1-0

_time64

api-ms-win-crt-math-l1-1-0

sqrt

api-ms-win-crt-locale-l1-1-0

___lc_codepage_func

ntdll

RtlCaptureContext

Sections

.text
Size: - Virtual size: 387KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rdata
Size: - Virtual size: 59KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.data
Size: - Virtual size: 135KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.pdata
Size: - Virtual size: 10KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.kRU
Size: - Virtual size: 19.7MB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.Tw?
Size: 4KB - Virtual size: 4KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.0Tm
Size: 32.7MB - Virtual size: 32.7MB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rsrc
Size: 512B - Virtual size: 480B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
loader/zlib1.dll
.dll windows:6 windows x64 arch:x64

d879d2294039900ef484e0f01607f882

Headers

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LARGE_ADDRESS_AWARE
IMAGE_FILE_DLL

Imports

vcruntime140

__std_type_info_destroy_list
__C_specific_handler
memmove
memchr
memset
memcpy

api-ms-win-crt-stdio-l1-1-0

_wopen
_write
_read
_close
__stdio_common_vsprintf
_open
_lseeki64

api-ms-win-crt-heap-l1-1-0

malloc
free

api-ms-win-crt-convert-l1-1-0

wcstombs

api-ms-win-crt-runtime-l1-1-0

_errno
strerror
_execute_onexit_table
_initialize_onexit_table
_initialize_narrow_environment
_configure_narrow_argv
_seh_filter_dll
_initterm_e
_initterm
_cexit

kernel32

DisableThreadLibraryCalls
RtlLookupFunctionEntry
RtlVirtualUnwind
UnhandledExceptionFilter
SetUnhandledExceptionFilter
GetCurrentProcess
TerminateProcess
IsProcessorFeaturePresent
IsDebuggerPresent
InitializeSListHead
RtlCaptureContext
GetSystemTimeAsFileTime
GetCurrentThreadId
GetCurrentProcessId
QueryPerformanceCounter

Exports

Exports

adler32
adler32_combine
adler32_z
compress
compress2
compressBound
crc32
crc32_combine
crc32_combine_gen
crc32_combine_op
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
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
uncompress
uncompress2
zError
zlibCompileFlags
zlibVersion

Sections

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

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rdata
Size: 27KB - Virtual size: 27KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.data
Size: 512B - Virtual size: 1KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

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

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.rsrc
Size: 1KB - Virtual size: 1KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.reloc
Size: 512B - Virtual size: 108B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

27c45b3de2498d2adb3dd620312262d3

Headers

DLL Characteristics

File Characteristics

Imports

ws2_32

bcrypt

zlib1

advapi32

crypt32

kernel32

vcruntime140

api-ms-win-crt-string-l1-1-0

api-ms-win-crt-stdio-l1-1-0

api-ms-win-crt-convert-l1-1-0

api-ms-win-crt-time-l1-1-0

api-ms-win-crt-runtime-l1-1-0

api-ms-win-crt-utility-l1-1-0

api-ms-win-crt-filesystem-l1-1-0

api-ms-win-crt-heap-l1-1-0

api-ms-win-crt-math-l1-1-0

Exports

Exports

Sections

.text Size: 392KB - Virtual size: 392KB

.rdata Size: 101KB - Virtual size: 101KB

.data Size: 10KB - Virtual size: 11KB

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

.rsrc Size: 1KB - Virtual size: 1KB

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

bcb88a5e6d0958ea68f06943554c5bb3

Headers

DLL Characteristics

File Characteristics

Imports

libcurl

kernel32

user32

gdi32

advapi32

shell32

winmm

imm32

msvcp140

wininet

urlmon

d3d9

vcruntime140_1

vcruntime140

api-ms-win-crt-stdio-l1-1-0

api-ms-win-crt-string-l1-1-0

api-ms-win-crt-utility-l1-1-0

api-ms-win-crt-heap-l1-1-0

api-ms-win-crt-convert-l1-1-0

api-ms-win-crt-runtime-l1-1-0

api-ms-win-crt-filesystem-l1-1-0

api-ms-win-crt-time-l1-1-0

api-ms-win-crt-math-l1-1-0

api-ms-win-crt-locale-l1-1-0

ntdll

Sections

.text Size: - Virtual size: 387KB

.rdata Size: - Virtual size: 59KB

.data Size: - Virtual size: 135KB

.pdata Size: - Virtual size: 10KB

.kRU Size: - Virtual size: 19.7MB

.Tw? Size: 4KB - Virtual size: 4KB

.0Tm Size: 32.7MB - Virtual size: 32.7MB

.rsrc Size: 512B - Virtual size: 480B

d879d2294039900ef484e0f01607f882

Headers

DLL Characteristics

File Characteristics

Imports

vcruntime140

.text
Size: 392KB - Virtual size: 392KB

.rdata
Size: 101KB - Virtual size: 101KB

.data
Size: 10KB - Virtual size: 11KB

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

.rsrc
Size: 1KB - Virtual size: 1KB

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

.text
Size: - Virtual size: 387KB

.rdata
Size: - Virtual size: 59KB

.data
Size: - Virtual size: 135KB

.pdata
Size: - Virtual size: 10KB

.kRU
Size: - Virtual size: 19.7MB

.Tw?
Size: 4KB - Virtual size: 4KB

.0Tm
Size: 32.7MB - Virtual size: 32.7MB

.rsrc
Size: 512B - Virtual size: 480B

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

.rdata
Size: 27KB - Virtual size: 27KB

.data
Size: 512B - Virtual size: 1KB

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

.rsrc
Size: 1KB - Virtual size: 1KB

.reloc
Size: 512B - Virtual size: 108B