Static task
static1
Behavioral task
behavioral1
Sample
u5btjl.exe
Resource
win10-20240404-en
Behavioral task
behavioral2
Sample
u5btjl.exe
Resource
win7-20240705-en
Behavioral task
behavioral3
Sample
u5btjl.exe
Resource
win10-20240404-en
Behavioral task
behavioral4
Sample
u5btjl.exe
Resource
win10v2004-20240802-en
Behavioral task
behavioral5
Sample
u5btjl.exe
Resource
win11-20240802-en
General
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Target
u5btjl.exe.skib
-
Size
7.2MB
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MD5
f6d8913637f1d5d2dc846de70ce02dc5
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SHA1
5fc9c6ab334db1f875fbc59a03f5506c478c6c3e
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SHA256
4e72ca1baee2c7c0f50a42614d101159a9c653a8d6f7498f7bf9d7026c24c187
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SHA512
21217a0a0eca58fc6058101aa69cf30d5dbe419c21fa7a160f44d8ebbcf5f4011203542c8f400a9bb8ee3826706417f2939c402f605817df597b7ff812b43036
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SSDEEP
98304:5ZQN5SX4vmsanECdjpqsq8AZwt2KlDCle:ncjvmSEjgJ8Anl
Malware Config
Signatures
-
Unsigned PE 1 IoCs
Checks for missing Authenticode signature.
resource u5btjl.exe.skib
Files
-
u5btjl.exe.skib.exe windows:6 windows x64 arch:x64
Password: secret
f0ea7b7844bbc5bfa9bb32efdcea957c
Headers
DLL Characteristics
IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE
File Characteristics
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LARGE_ADDRESS_AWARE
IMAGE_FILE_DEBUG_STRIPPED
Imports
kernel32
WriteFile
WriteConsoleW
WaitForMultipleObjects
WaitForSingleObject
VirtualQuery
VirtualFree
VirtualAlloc
TlsAlloc
SwitchToThread
SuspendThread
SetWaitableTimer
SetUnhandledExceptionFilter
SetProcessPriorityBoost
SetEvent
SetErrorMode
SetConsoleCtrlHandler
ResumeThread
PostQueuedCompletionStatus
LoadLibraryA
LoadLibraryW
SetThreadContext
GetThreadContext
GetSystemInfo
GetSystemDirectoryA
GetStdHandle
GetQueuedCompletionStatusEx
GetProcessAffinityMask
GetProcAddress
GetEnvironmentStringsW
GetConsoleMode
FreeEnvironmentStringsW
ExitProcess
DuplicateHandle
CreateWaitableTimerExW
CreateThread
CreateIoCompletionPort
CreateFileA
CreateEventA
CloseHandle
AddVectoredExceptionHandler
Sections
.text Size: 2.4MB - Virtual size: 2.4MB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rdata Size: 2.3MB - Virtual size: 2.3MB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.data Size: 247KB - Virtual size: 620KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
/4 Size: 512B - Virtual size: 295B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
/19 Size: 411KB - Virtual size: 411KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
/32 Size: 84KB - Virtual size: 83KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
/46 Size: 512B - Virtual size: 42B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
/65 Size: 707KB - Virtual size: 706KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
/78 Size: 551KB - Virtual size: 550KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
/90 Size: 138KB - Virtual size: 137KB
IMAGE_SCN_CNT_INITIALIZED_DATA
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
.reloc Size: 41KB - Virtual size: 41KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
.symtab Size: 343KB - Virtual size: 342KB
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ