Behavioral task
behavioral1
Sample
entropy/entropy.dll
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
entropy/entropy.dll
Resource
win10v2004-20240802-en
Behavioral task
behavioral3
Sample
entropy/entropy.exe
Resource
win7-20240903-en
Behavioral task
behavioral4
Sample
entropy/entropy.exe
Resource
win10v2004-20240802-en
Behavioral task
behavioral5
Sample
entropy/entropyloader.dll
Resource
win7-20240708-en
Behavioral task
behavioral6
Sample
entropy/entropyloader.dll
Resource
win10v2004-20240802-en
General
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Target
entropy.rar
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Size
23.2MB
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MD5
15ec05cdc176dbab41a59bbc6669384b
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SHA1
1fe7aad71aa5fbab853ead759281ce9ac58458c0
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SHA256
5b49adb0e97c0c26a2e391c0e0f452ab33f26e070c053c85c5e01bbeb2a2bb34
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SHA512
9ab1186695c896892d719d422644e883abd89bde40fad2d3ce429f5419d8c9fcea4c5574bff0baa2e2818cbf2846c4962ddbf15d3a8a4e9ac0121110d83fb4bd
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SSDEEP
393216:upm9b8IdRGA6HVL70qvAP56u3jaqAc6YVb0a7+xQwtfVGCCa0Oo4jq/eCp7l3:Am2L70fR6uTaBYFnJCM9a0Oo4jqf3
Malware Config
Extracted
skuld
https://ptb.discord.com/api/webhooks/1284129975246524467/2KIQ0y_EKuR-2Ekg7DykajQRxBZ2HFJZflNz40zZOjAKjmmmVSa64WpWtZe6io39h_Dl
Signatures
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Skuld family
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Unsigned PE 1 IoCs
Checks for missing Authenticode signature.
Processes:
resource unpack001/entropy/entropy.exe
Files
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entropy.rar.rar
Password: entropy
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entropy/entropy.dll
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entropy/entropy.exe.exe windows:6 windows x64 arch:x64
Password: entropy
c2d457ad8ac36fc9f18d45bffcd450c2
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
Imports
kernel32
WriteFile
WriteConsoleW
WerSetFlags
WerGetFlags
WaitForMultipleObjects
WaitForSingleObject
VirtualQuery
VirtualFree
VirtualAlloc
TlsAlloc
SwitchToThread
SuspendThread
SetWaitableTimer
SetProcessPriorityBoost
SetEvent
SetErrorMode
SetConsoleCtrlHandler
RtlVirtualUnwind
RtlLookupFunctionEntry
ResumeThread
RaiseFailFastException
PostQueuedCompletionStatus
LoadLibraryW
LoadLibraryExW
SetThreadContext
GetThreadContext
GetSystemInfo
GetSystemDirectoryA
GetStdHandle
GetQueuedCompletionStatusEx
GetProcessAffinityMask
GetProcAddress
GetErrorMode
GetEnvironmentStringsW
GetCurrentThreadId
GetConsoleMode
FreeEnvironmentStringsW
ExitProcess
DuplicateHandle
CreateWaitableTimerExW
CreateThread
CreateIoCompletionPort
CreateFileA
CreateEventA
CloseHandle
AddVectoredExceptionHandler
AddVectoredContinueHandler
Sections
.text Size: 4.6MB - Virtual size: 4.6MB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rdata Size: 4.2MB - Virtual size: 4.2MB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.data Size: 463KB - Virtual size: 1.0MB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.pdata Size: 107KB - Virtual size: 107KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.xdata Size: 512B - Virtual size: 180B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
/4 Size: 512B - Virtual size: 297B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
/19 Size: 891KB - Virtual size: 890KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
/32 Size: 166KB - Virtual size: 165KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
/46 Size: 512B - Virtual size: 48B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
/65 Size: 1.7MB - Virtual size: 1.7MB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
/78 Size: 1.0MB - Virtual size: 1.0MB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
/90 Size: 318KB - Virtual size: 317KB
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: 64KB - Virtual size: 63KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
.symtab Size: 682KB - Virtual size: 682KB
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
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entropy/entropyloader.dll