UltraDropper[.]exe[.]malw

Target
UltraDropper.exe.malw
Size 2.1MB
Sample251128-sys2eayjdr
SHA256 fe19aeec466180589b0fba6cfcf11b9741f3c19fa8ee29a26a4e9ea8da5114de
MD5 d61d6669d8af8bc8c02b944f908677b9
SHA1 42274847fc24aac797ac5fd74aa469e5d4786495
SHA512 8ec3fd3659970495ce72b9d21e95dcbf4302a4655f12275f6bbdabac330973a261cda07189be16846f5c42377dd40aa0813973687a9d8a597d7b84fba7f3b604
SSDEEP 49152:pW2vZKbn0KJrgcvZ4dvTrRpjgYhNWue0CJAop:PvZKrJ5vZ4drfgYOfF
MD5 SHA1 SHA512 SSDEEP

Score

3^/10

Malware Config

Signatures

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
UltraDropper.exe.malw

File Explorer

UltraDropper.exe.malw

.exe 2.1MB

UltraDropper.exe.malw

IMPHASH f481497934ffb847cc547d3d417afaf2
SHA256 fe19aeec466180589b0fba6cfcf11b9741f3c19fa8ee29a26a4e9ea8da5114de
MD5 d61d6669d8af8bc8c02b944f908677b9
SHA1 42274847fc24aac797ac5fd74aa469e5d4786495
SHA512 8ec3fd3659970495ce72b9d21e95dcbf4302a4655f12275f6bbdabac330973a261cda07189be16846f5c42377dd40aa0813973687a9d8a597d7b84fba7f3b604
SSDEEP 49152:pW2vZKbn0KJrgcvZ4dvTrRpjgYhNWue0CJAop:PvZKrJ5vZ4drfgYOfF
MD5 SHA1 SHA512 SSDEEP

windows:4 windows x86 arch:x86

Unsigned PE

Checks for missing Authenticode signature.

Minor OS version

Major OS version

Entry point

4318

Magic Number

267

Subsystem

IMAGE_SUBSYSTEM_WINDOWS_CUI

DLL Characteristics

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_32BIT_MACHINE

PDB paths

kernel32

CreateDirectoryA CreateProcessA DeleteCriticalSection EnterCriticalSection ExpandEnvironmentStringsA FindResourceA FreeLibrary GetEnvironmentVariableA GetLastError GetModuleHandleA GetProcAddress GetStartupInfoA InitializeCriticalSection LeaveCriticalSection LoadLibraryA LoadResource LockResource SetUnhandledExceptionFilter SizeofResource Sleep TlsGetValue VirtualProtect VirtualQuery WaitForSingleObject

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

__p__environ __p__wenviron

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

_set_new_mode calloc free malloc

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

__setusermatherr

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

memcpy

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

__p___argc __p___argv __p___wargv __p__acmdln _cexit _configure_narrow_argv _configure_wide_argv _crt_at_quick_exit _crt_atexit _initialize_narrow_environment _set_app_type _initialize_wide_environment _initterm _set_invalid_parameter_handler abort exit signal

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

__acrt_iob_func __p__commode __p__fmode __stdio_common_vfprintf __stdio_common_vfwprintf __stdio_common_vsprintf fclose fopen fwrite

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

memset strcat strlen strncmp

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

__daylight __timezone __tzname _tzset

user32

MessageBoxA

Name

.text

Size

10KB

Virtual Size

9KB

Characteristics

IMAGE_SCN_CNT_CODE IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_EXECUTE IMAGE_SCN_MEM_READ

Name

.data

Size

512B

Virtual Size

120B

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.rdata

Size

6KB

Virtual Size

6KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

Size

2KB

Virtual Size

2KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.bss

Size

Virtual Size

196B

Characteristics

IMAGE_SCN_CNT_UNINITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.idata

Size

2KB

Virtual Size

2KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.CRT

Size

512B

Virtual Size

48B

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.tls

Size

512B

Virtual Size

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.rsrc

Size

2.1MB

Virtual Size

2.1MB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.reloc

Size

1024B

Virtual Size

688B

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_DISCARDABLE IMAGE_SCN_MEM_READ

Name

/14

Size

512B

Virtual Size

56B

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_DISCARDABLE IMAGE_SCN_MEM_READ

Name

/29

Size

3KB

Virtual Size

3KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_DISCARDABLE IMAGE_SCN_MEM_READ

Name

/41

Size

512B

Virtual Size

175B

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_DISCARDABLE IMAGE_SCN_MEM_READ

Name

/55

Size

512B

Virtual Size

160B

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_DISCARDABLE IMAGE_SCN_MEM_READ

Name

/67

Size

512B

Virtual Size

56B

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_DISCARDABLE IMAGE_SCN_MEM_READ

Name

/80

Size

512B

Virtual Size

119B

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_DISCARDABLE IMAGE_SCN_MEM_READ

Name

/91

Size

512B

Virtual Size

372B

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_DISCARDABLE IMAGE_SCN_MEM_READ

Resubmissions

Sharing

General

Malware Config

Signatures

File Explorer

UltraDropper.exe.malw

kernel32

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

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

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

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

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

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

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

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

user32

generic