Behavioral task
behavioral1
Sample
8f81fa9b717b7314e270a36c883549d3aaa5c68907e1056b5de1989bf3fbffd6.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
8f81fa9b717b7314e270a36c883549d3aaa5c68907e1056b5de1989bf3fbffd6.exe
Resource
win10v2004-20240221-en
General
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Target
8f81fa9b717b7314e270a36c883549d3aaa5c68907e1056b5de1989bf3fbffd6
-
Size
972KB
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MD5
61d0f7a8ed63c7a3cb0c0afba6551db0
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SHA1
4da2b192b133d844762978f0afddb978fa3c3b7c
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SHA256
8f81fa9b717b7314e270a36c883549d3aaa5c68907e1056b5de1989bf3fbffd6
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SHA512
2bf14039a877297fd0b47da03ba74717ca0984fdef3bb909105ab677277dac02cea4139773279316f898a0cfe4a6a2081737644f151ae44e10baf8249e91fe1a
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SSDEEP
12288:K6j8MdyxsNFeo0ykfQdvcRcsFVEE6Pa9xMzK3gVhTNDAvT7ItBR:8M8x2EZfQdvcRtDNgVhTePItB
Malware Config
Extracted
cobaltstrike
http://update.office-oa.org:8443/api/2
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user_agent
Host: update.office-oa.org User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko
Signatures
-
Cobaltstrike family
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Unsigned PE 1 IoCs
Checks for missing Authenticode signature.
resource 8f81fa9b717b7314e270a36c883549d3aaa5c68907e1056b5de1989bf3fbffd6
Files
-
8f81fa9b717b7314e270a36c883549d3aaa5c68907e1056b5de1989bf3fbffd6.exe windows:6 windows x64 arch:x64
c7269d59926fa4252270f407e4dab043
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
SwitchToThread
SuspendThread
Sleep
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: 431KB - Virtual size: 431KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rdata Size: 500KB - Virtual size: 500KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.data Size: 16KB - Virtual size: 377KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.idata Size: 1KB - Virtual size: 1KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.reloc Size: 20KB - Virtual size: 19KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
.symtab Size: 512B - Virtual size: 4B
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ