Static task
static1
Behavioral task
behavioral1
Sample
StudioExtract.exe
Resource
win7-20240704-en
Behavioral task
behavioral2
Sample
StudioExtract.exe
Resource
win10v2004-20240709-en
General
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Target
StudioExtract_win.zip
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Size
6.3MB
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MD5
41a9f617d2062710ebfaea26d4f48d3f
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SHA1
ef3c1aedc2add29a1093c6ed98bd5204806bac53
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SHA256
b2a4cb350e8398170dc52674c5c1cac0a6f94e9b3bfb6757fcaae6cc81bdb8d6
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SHA512
56aa1d0f02732c7492b387a66acc601dbdaf8ad48d9ff19480cf7369de330d4680b2d54d210ac57a57d1e4d469a9c8919c97da86eac9408b9ee5b385005f7051
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SSDEEP
196608:rPQpORZ7dsDwEFlCgoJ7leXf5fGWyjyFiYfJG1gG6e:rPQ6HHL8RfGWywiYhGF1
Malware Config
Signatures
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Unsigned PE 1 IoCs
Checks for missing Authenticode signature.
resource unpack001/StudioExtract.exe
Files
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StudioExtract_win.zip.zip
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Koikatu_F_20240713134241797.png.png
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Koikatu_F_20240713134241811.png.png
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Koikatu_F_20240713134241813.png.png
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Koikatu_F_20240713134241815.png.png
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StudioExtract.exe.exe windows:6 windows x64 arch:x64
91802a615b3a5c4bcc05bc5f66a5b219
Headers
DLL Characteristics
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE
File Characteristics
IMAGE_FILE_RELOCS_STRIPPED
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LARGE_ADDRESS_AWARE
IMAGE_FILE_DEBUG_STRIPPED
Imports
kernel32
WriteFile
WriteConsoleW
WaitForMultipleObjects
WaitForSingleObject
VirtualQuery
VirtualFree
VirtualAlloc
SwitchToThread
SuspendThread
SetWaitableTimer
SetUnhandledExceptionFilter
SetProcessPriorityBoost
SetEvent
SetErrorMode
SetConsoleCtrlHandler
ResumeThread
PostQueuedCompletionStatus
LoadLibraryA
LoadLibraryW
SetThreadContext
GetThreadContext
GetSystemInfo
GetSystemDirectoryA
GetStdHandle
GetQueuedCompletionStatus
GetProcessAffinityMask
GetProcAddress
GetEnvironmentStringsW
GetConsoleMode
FreeEnvironmentStringsW
ExitProcess
DuplicateHandle
CreateThread
CreateIoCompletionPort
CreateEventA
CloseHandle
AddVectoredExceptionHandler
Sections
.text Size: 1.2MB - Virtual size: 1.2MB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rdata Size: 1.4MB - Virtual size: 1.4MB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.data Size: 91KB - Virtual size: 284KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
/4 Size: 512B - Virtual size: 281B
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
/19 Size: 187KB - Virtual size: 187KB
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
/32 Size: 44KB - Virtual size: 43KB
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
/46 Size: 13KB - Virtual size: 12KB
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
/63 Size: 20KB - Virtual size: 20KB
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
/80 Size: 512B - Virtual size: 38B
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
/99 Size: 347KB - Virtual size: 347KB
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
/112 Size: 193KB - Virtual size: 192KB
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
/124 Size: 66KB - Virtual size: 65KB
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
.idata Size: 1KB - Virtual size: 1KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.symtab Size: 227KB - Virtual size: 227KB
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ