libcurl[.]dll | Triage

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General

Target

libcurl.dll
Size

553KB
MD5

5d398220f41c5dde169f18897b1fb0db
SHA1

563628e0e78ef347b17bcbb28c38e067c61df41f
SHA256

f7c95ce5981ae67d312e17ffd4bf27d79b28f5a2d9806437c99dc7425e4ad6a3
SHA512

8a2d89e4f5868b6996ca0b74a30a7fddf214ebd1692db30871ce5386ebf1260ab9e4e65a2250f778135f2918a1520769a1c1bfe2bcd0bb16217e9ad13ee2ff88
SSDEEP

12288:7KAjqEm64uz9+jcPWz2+yvOI8xacvS+Zu:7xm64uzwHz2/vOIql

Score

3^/10

Malware Config

Signatures

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
libcurl.dll

Files

libcurl.dll
.dll windows:6 windows x64 arch:x64

be26384c030b90101aa84d6030464f72

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

wldap32

ord200
ord301
ord79
ord35
ord33
ord32
ord27
ord26
ord22
ord41
ord50
ord60
ord211
ord46
ord217
ord30
ord143

ws2_32

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

libssl-1_1-x64

SSL_CTX_sess_set_new_cb
SSL_CTX_set_alpn_protos
OPENSSL_init_ssl
SSL_get_ex_data
SSL_set_ex_data
SSL_get0_alpn_selected
SSL_CTX_set_keylog_callback
SSL_CTX_set_cipher_list
SSL_get_verify_result
SSL_CTX_new
SSL_get_shutdown
SSL_CTX_free
SSL_CTX_get_cert_store
SSL_CTX_set_cert_store
SSL_get_current_cipher
SSL_CIPHER_get_name
SSL_pending
SSL_set_bio
SSL_CTX_set_ciphersuites
SSL_get_privatekey
SSL_CTX_use_PrivateKey_file
SSL_get_certificate
SSL_set_connect_state
SSL_CTX_set_msg_callback
SSL_CTX_use_certificate_file
SSL_CTX_use_certificate_chain_file
SSL_alert_desc_string_long
SSL_CTX_set_post_handshake_auth
SSL_shutdown
SSL_SESSION_free
TLS_client_method
SSL_set_session
SSL_get_peer_certificate
SSL_get_peer_cert_chain
SSL_get_version
SSL_CTX_set_verify
SSL_CTX_use_PrivateKey
SSL_CTX_use_certificate
SSL_CTX_set_default_passwd_cb
SSL_get_error
SSL_CTX_set_default_passwd_cb_userdata
SSL_new
SSL_CTX_ctrl
SSL_ctrl
SSL_write
SSL_read
SSL_connect
SSL_CTX_add_client_CA
SSL_CTX_check_private_key
SSL_free
SSL_CTX_set_options

libcrypto-1_1-x64

X509_get_subject_name
X509_get0_notBefore
X509_get0_notAfter
X509_get_X509_PUBKEY
X509_get0_extensions
X509_get_pubkey
X509_NAME_print_ex
X509_NAME_get_index_by_NID
X509_NAME_get_entry
X509_NAME_ENTRY_get_data
X509_get_ext_d2i
X509_EXTENSION_get_object
X509_EXTENSION_get_data
X509_PUBKEY_get0_param
PEM_X509_INFO_read_bio
PEM_read_bio_X509
PEM_write_bio_X509
PEM_read_bio_X509_AUX
PEM_read_bio_PrivateKey
RAND_bytes
RAND_status
GENERAL_NAMES_free
X509V3_EXT_print
X509_check_issued
ERR_get_error
ERR_peek_error
ERR_peek_last_error
ERR_clear_error
ERR_error_string_n
PKCS12_free
PKCS12_PBE_add
PKCS12_parse
d2i_PKCS12_bio
OCSP_cert_to_id
OCSP_response_status
OCSP_response_get1_basic
OCSP_resp_find_status
OCSP_check_validity
OCSP_BASICRESP_free
OCSP_RESPONSE_free
d2i_OCSP_RESPONSE
OCSP_CERTID_free
OCSP_response_status_str
OCSP_cert_status_str
OCSP_crl_reason_str
OCSP_basic_verify
UI_get0_user_data
UI_OpenSSL
UI_create_method
UI_destroy_method
UI_method_set_opener
UI_method_set_writer
UI_method_set_reader
UI_method_set_closer
UI_method_get_opener
UI_method_get_writer
UI_method_get_reader
UI_method_get_closer
UI_get_string_type
X509_get_issuer_name
UI_set_result
X509_get_serialNumber
ENGINE_get_next
ENGINE_by_id
ENGINE_ctrl
ENGINE_ctrl_cmd
ENGINE_free
ENGINE_get_id
ENGINE_init
ENGINE_finish
ENGINE_load_private_key
ENGINE_set_default
X509_get_version
ASN1_STRING_to_UTF8
i2t_ASN1_OBJECT
i2a_ASN1_OBJECT
ASN1_STRING_get0_data
ASN1_STRING_type
ASN1_STRING_length
BN_print
BN_num_bits
BIO_meth_set_destroy
BIO_meth_set_create
BIO_meth_set_ctrl
BIO_meth_set_read
BIO_meth_set_write
BIO_meth_free
BIO_meth_new
BIO_printf
X509_INFO_free
X509_get0_signature
d2i_X509
X509_free
BIO_new_mem_buf
i2d_X509_PUBKEY
d2i_PrivateKey_bio
d2i_X509_bio
BIO_s_mem
X509_verify_cert_error_string
X509_STORE_load_locations
BIO_ctrl
X509_load_crl_file
BIO_puts
BIO_get_shutdown
BIO_set_shutdown
BIO_set_init
BIO_get_data
BIO_set_data
BIO_free
BIO_new
BIO_s_file
BIO_clear_flags
X509_STORE_add_crl
X509_STORE_add_cert
X509_LOOKUP_file
X509_STORE_add_lookup
X509_STORE_set_flags
X509_STORE_up_ref
X509_STORE_free
UI_get_input_flags
DSA_get0_key
DSA_get0_pqg
DH_get0_key
DH_get0_pqg
RSA_flags
RSA_free
RSA_get0_key
EVP_PKEY_copy_parameters
EVP_PKEY_free
EVP_PKEY_get0_DH
EVP_PKEY_get0_DSA
EVP_PKEY_get1_RSA
EVP_PKEY_get0_RSA
EVP_PKEY_id
EVP_sha1
EVP_DigestInit
ASN1_STRING_print
DES_ecb_encrypt
DES_set_odd_parity
DES_set_key_unchecked
MD4_Init
MD4_Update
MD4_Final
MD5_Init
MD5_Update
MD5_Final
EVP_MD_CTX_new
EVP_MD_CTX_free
EVP_DigestInit_ex
EVP_DigestUpdate
EVP_DigestFinal_ex
EVP_sha256
OPENSSL_sk_num
OPENSSL_sk_value
OPENSSL_sk_pop_free
OPENSSL_sk_pop
OpenSSL_version_num
CRYPTO_malloc
CRYPTO_free
BIO_set_flags
ENGINE_get_first
ASN1_TIME_print

nghttp2

nghttp2_is_fatal
nghttp2_version
nghttp2_session_set_local_window_size
nghttp2_session_check_request_allowed
nghttp2_submit_ping
nghttp2_submit_settings
nghttp2_submit_rst_stream
nghttp2_submit_priority
nghttp2_submit_request
nghttp2_http2_strerror
nghttp2_strerror
nghttp2_pack_settings_payload
nghttp2_session_upgrade2
nghttp2_session_get_remote_settings
nghttp2_session_get_remote_window_size
nghttp2_session_get_stream_remote_window_size
nghttp2_session_set_stream_user_data
nghttp2_session_get_stream_user_data
nghttp2_session_want_write
nghttp2_priority_spec_init
nghttp2_session_resume_data
nghttp2_session_mem_recv
nghttp2_session_send
nghttp2_session_del
nghttp2_session_client_new2
nghttp2_option_set_no_rfc9113_leading_and_trailing_ws_validation
nghttp2_option_del
nghttp2_option_new
nghttp2_session_callbacks_set_error_callback
nghttp2_session_callbacks_set_on_header_callback
nghttp2_session_callbacks_set_on_begin_headers_callback
nghttp2_session_callbacks_set_on_stream_close_callback
nghttp2_session_callbacks_set_on_data_chunk_recv_callback
nghttp2_session_callbacks_set_on_frame_recv_callback
nghttp2_session_callbacks_set_send_callback
nghttp2_session_callbacks_del
nghttp2_session_callbacks_new
nghttp2_session_want_read

libssh2

libssh2_sftp_write
libssh2_sftp_close_handle
libssh2_sftp_seek64
libssh2_sftp_rename_ex
libssh2_sftp_unlink_ex
libssh2_sftp_statvfs
libssh2_sftp_mkdir_ex
libssh2_sftp_rmdir_ex
libssh2_sftp_stat_ex
libssh2_sftp_symlink_ex
libssh2_sftp_readdir_ex
libssh2_init
libssh2_exit
libssh2_session_init_ex
libssh2_session_abstract
libssh2_session_callback_set
libssh2_session_handshake
libssh2_session_disconnect_ex
libssh2_sftp_read
libssh2_sftp_open_ex
libssh2_hostkey_hash
libssh2_session_hostkey
libssh2_session_method_pref
libssh2_session_last_error
libssh2_session_last_errno
libssh2_session_block_directions
libssh2_session_flag
libssh2_userauth_list
libssh2_userauth_authenticated
libssh2_userauth_password_ex
libssh2_userauth_publickey_fromfile_ex
libssh2_userauth_keyboard_interactive_ex
libssh2_channel_read_ex
libssh2_channel_write_ex
libssh2_session_set_blocking
libssh2_channel_send_eof
libssh2_channel_wait_eof
libssh2_channel_wait_closed
libssh2_channel_free
libssh2_scp_recv2
libssh2_scp_send64
libssh2_sftp_last_error
libssh2_sftp_shutdown
libssh2_sftp_init
libssh2_agent_free
libssh2_agent_disconnect
libssh2_agent_userauth
libssh2_agent_get_identity
libssh2_agent_list_identities
libssh2_agent_connect
libssh2_agent_init
libssh2_knownhost_get
libssh2_knownhost_writefile
libssh2_knownhost_readfile
libssh2_knownhost_free
libssh2_knownhost_del
libssh2_knownhost_checkp
libssh2_knownhost_add
libssh2_knownhost_init
libssh2_version
libssh2_session_free

crypt32

CertEnumCertificatesInStore
CertFreeCertificateContext
CertGetEnhancedKeyUsage
CertGetIntendedKeyUsage
CertOpenSystemStoreA
CertCloseStore

bcrypt

BCryptGenRandom

kernel32

EnterCriticalSection
LeaveCriticalSection
InitializeCriticalSectionEx
DeleteCriticalSection
SleepEx
CloseHandle
WaitForSingleObjectEx
ReleaseSRWLockExclusive
IsDebuggerPresent
InitializeSListHead
DisableThreadLibraryCalls
GetCurrentThreadId
IsProcessorFeaturePresent
TerminateProcess
GetCurrentProcess
SetUnhandledExceptionFilter
UnhandledExceptionFilter
RtlVirtualUnwind
RtlLookupFunctionEntry
RtlCaptureContext
AcquireSRWLockExclusive
GetEnvironmentVariableA
Sleep
MoveFileExA
GetCurrentProcessId
GetLastError
SetLastError
FormatMessageW
QueryPerformanceFrequency
GetSystemDirectoryA
FreeLibrary
GetModuleHandleA
GetSystemTimeAsFileTime
CompareFileTime
VerifyVersionInfoW
VerSetConditionMask
GetTickCount
QueryPerformanceCounter
WaitForMultipleObjects
PeekNamedPipe
ReadFile
GetFileType
GetStdHandle
LoadLibraryA
GetProcAddress

vcruntime140

memset
strchr
strrchr
memchr
memmove
memcmp
strstr
__C_specific_handler
__std_type_info_destroy_list
memcpy

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

fclose
fputs
__stdio_common_vsscanf
setvbuf
_close
fflush
__acrt_iob_func
ftell
feof
fgets
fwrite
fopen
_open
_read
_write
_lseeki64
fread
fseek
__stdio_common_vsprintf
fputc

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

atoi
strtol
strtoul
wcstombs
strtoll

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

strftime
_time64
_gmtime64

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

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

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

strncpy
strspn
strcspn
_strdup
strncmp
strpbrk
strcmp

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

qsort

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

_stat64
_fstat64
_access
_unlink

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

free
calloc
malloc
realloc

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

_mbspbrk

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_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_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: 404KB - Virtual size: 404KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rdata
Size: 115KB - Virtual size: 114KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.data
Size: 9KB - Virtual size: 11KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

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

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

Sharing

General

Malware Config

Signatures

Files

be26384c030b90101aa84d6030464f72

Headers

DLL Characteristics

File Characteristics

Imports

wldap32

ws2_32

libssl-1_1-x64

libcrypto-1_1-x64

nghttp2

libssh2

crypt32

bcrypt

kernel32

vcruntime140

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-string-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-multibyte-l1-1-0

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

Exports

Exports

Sections

.text Size: 404KB - Virtual size: 404KB

.rdata Size: 115KB - Virtual size: 114KB

.data Size: 9KB - Virtual size: 11KB

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

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

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

.text
Size: 404KB - Virtual size: 404KB

.rdata
Size: 115KB - Virtual size: 114KB

.data
Size: 9KB - Virtual size: 11KB

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

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

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