umbral | skeet (1) (skeet)[.]zip

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General

Target

skeet (1) (skeet).zip
Size

3.5MB
MD5

4ec3431f372650d231b13b3688e62959
SHA1

6380f8899ced0cde4d4347504ce63c5da49bd196
SHA256

a67211d3d5d58e9193a6a99db1f44c05d96bf48f6f6589ea6d0b91f92233d611
SHA512

138b799e10609bd10736348be67cce6ca951b895f9dce31ec978406da087ed90468da33553baafba1f62275e0211981d8b256225b1d826b877b96f980e5d65b5
SSDEEP

98304:QHJEPWBVNTfNSrTV8h/kUvHvj6pdDZYFkoXXCPBZMnYPJ2k:QHJEPWHNT1STVavsqFkonsBcMYk

Score

10^/10

umbral

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
static1/unpack001/steam.exe	family_umbral

Umbral family
umbral

Unsigned PE 2 IoCs

Checks for missing Authenticode signature.

resource
unpack001/skeet.dll
unpack001/steam.exe

Files

skeet (1) (skeet).zip
.zip

Password: skeet
skeet.dll
.dll windows:6 windows x86 arch:x86

Password: skeet

eaf67aba045dcfff7b1d28ae8bfc8b09

Headers

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_32BIT_MACHINE
IMAGE_FILE_DLL

PDB Paths

C:\Users\ivank\source\repos\skeet\Release\skeet.pdb

Imports

kernel32

GetModuleHandleA
AllocConsole
SetConsoleTitleA
CreateThread
GetProcAddress
FindResourceW
LoadResource
LockResource
SizeofResource
VirtualAlloc
LoadLibraryA
AddVectoredExceptionHandler
SetThreadContext
ResumeThread
CloseHandle
GetSystemTimeAsFileTime
GetCurrentProcessId
SetEnvironmentVariableW
AcquireSRWLockExclusive
WakeAllConditionVariable
SleepConditionVariableSRW
UnhandledExceptionFilter
SetUnhandledExceptionFilter
GetCurrentProcess
TerminateProcess
IsProcessorFeaturePresent
IsDebuggerPresent
QueryPerformanceCounter
GetCurrentThreadId
InitializeSListHead
ReleaseSRWLockExclusive

user32

MessageBoxA
FindWindowA
MessageBoxW

msvcp140

?sputn@?$basic_streambuf@DU?$char_traits@D@std@@@std@@QAE_JPBD_J@Z
?setstate@?$basic_ios@DU?$char_traits@D@std@@@std@@QAEXH_N@Z
?fill@?$basic_ios@DU?$char_traits@D@std@@@std@@QBEDXZ
?_Xlength_error@std@@YAXPBD@Z
?_Osfx@?$basic_ostream@DU?$char_traits@D@std@@@std@@QAEXXZ
?_Throw_Cpp_error@std@@YAXH@Z
_Thrd_detach
?setf@ios_base@std@@QAEHHH@Z
?_Xout_of_range@std@@YAXPBD@Z
?_Xinvalid_argument@std@@YAXPBD@Z
?_Xbad_function_call@std@@YAXXZ
_Cnd_do_broadcast_at_thread_exit
??6?$basic_ostream@DU?$char_traits@D@std@@@std@@QAEAAV01@P6AAAVios_base@1@AAV21@@Z@Z
??6?$basic_ostream@DU?$char_traits@D@std@@@std@@QAEAAV01@H@Z
??6?$basic_ostream@DU?$char_traits@D@std@@@std@@QAEAAV01@I@Z
??6?$basic_ostream@DU?$char_traits@D@std@@@std@@QAEAAV01@_K@Z
?flush@?$basic_ostream@DU?$char_traits@D@std@@@std@@QAEAAV12@XZ
?cout@std@@3V?$basic_ostream@DU?$char_traits@D@std@@@1@A
?width@ios_base@std@@QBE_JXZ
?flags@ios_base@std@@QBEHXZ
?sputc@?$basic_streambuf@DU?$char_traits@D@std@@@std@@QAEHD@Z
?rdbuf@?$basic_ios@DU?$char_traits@D@std@@@std@@QBEPAV?$basic_streambuf@DU?$char_traits@D@std@@@2@XZ
?width@ios_base@std@@QAE_J_J@Z
?uncaught_exceptions@std@@YAHXZ
?good@ios_base@std@@QBE_NXZ
?tie@?$basic_ios@DU?$char_traits@D@std@@@std@@QBEPAV?$basic_ostream@DU?$char_traits@D@std@@@2@XZ

vcruntime140

__current_exception_context
memset
__std_exception_copy
__std_exception_destroy
__CxxFrameHandler3
_CxxThrowException
_except_handler4_common
__std_type_info_destroy_list
memcpy
__current_exception
memmove

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

_execute_onexit_table
_configure_narrow_argv
_initterm_e
_beginthreadex
_initterm
_cexit
_initialize_narrow_environment
_errno
_crt_atexit
_seh_filter_dll
terminate
_invalid_parameter_noinfo_noreturn
_register_onexit_function
_initialize_onexit_table
system

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

__stdio_common_vsprintf
__acrt_iob_func
freopen

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

malloc
_callnewh
free

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

strtoul
strtod
strtoull
strtoll

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

localeconv

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

_dclass

Sections

.text
Size: 1.7MB - Virtual size: 1.7MB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rdata
Size: 57KB - Virtual size: 56KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.data
Size: 537KB - Virtual size: 537KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.rsrc
Size: 10.9MB - Virtual size: 10.9MB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

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

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
steam.exe
.exe windows:4 windows x86 arch:x86

Password: skeet

Headers

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LINE_NUMS_STRIPPED
IMAGE_FILE_LOCAL_SYMS_STRIPPED
IMAGE_FILE_BYTES_REVERSED_LO
IMAGE_FILE_32BIT_MACHINE
IMAGE_FILE_BYTES_REVERSED_HI

Sections

CODE
Size: 5KB - Virtual size: 4KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

DATA
Size: 512B - Virtual size: 124B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

BSS
Size: - Virtual size: 1KB

IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.idata
Size: 1024B - Virtual size: 770B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.tls
Size: - Virtual size: 4B

IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.rdata
Size: 512B - Virtual size: 24B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.reloc
Size: 512B - Virtual size: 456B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.rsrc
Size: 253KB - Virtual size: 253KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

Password: skeet

Password: skeet

eaf67aba045dcfff7b1d28ae8bfc8b09

Headers

DLL Characteristics

File Characteristics

PDB Paths

Imports

kernel32

user32

msvcp140

vcruntime140

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

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

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

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

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

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

Sections

.text Size: 1.7MB - Virtual size: 1.7MB

.rdata Size: 57KB - Virtual size: 56KB

.data Size: 537KB - Virtual size: 537KB

.rsrc Size: 10.9MB - Virtual size: 10.9MB

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

Password: skeet

Headers

File Characteristics

Sections

CODE Size: 5KB - Virtual size: 4KB

DATA Size: 512B - Virtual size: 124B

BSS Size: - Virtual size: 1KB

.idata Size: 1024B - Virtual size: 770B

.tls Size: - Virtual size: 4B

.rdata Size: 512B - Virtual size: 24B

.reloc Size: 512B - Virtual size: 456B

.rsrc Size: 253KB - Virtual size: 253KB

.text
Size: 1.7MB - Virtual size: 1.7MB

.rdata
Size: 57KB - Virtual size: 56KB

.data
Size: 537KB - Virtual size: 537KB

.rsrc
Size: 10.9MB - Virtual size: 10.9MB

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

CODE
Size: 5KB - Virtual size: 4KB

DATA
Size: 512B - Virtual size: 124B

BSS
Size: - Virtual size: 1KB

.idata
Size: 1024B - Virtual size: 770B

.tls
Size: - Virtual size: 4B

.rdata
Size: 512B - Virtual size: 24B

.reloc
Size: 512B - Virtual size: 456B

.rsrc
Size: 253KB - Virtual size: 253KB