defendnot | defendnot-loader[.]exe

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General

Target
defendnot-loader.exe
Size 592KB
Sample260820-rt9ypayfnc
SHA256 8c3c38781a6e6eb9112b5debfeceaa3c0e9fd20dabf45f3b441ef9926575ba3a
MD5 e547f448b7c0db8f2a5455ad7d70c9d4
SHA1 db10e1083fea3709a1940c662cfe196c149fb640
SHA512 6eaab3b79bb670273643670a8e29831f203b31bd229ab69f3ac085433bc616bfdf0285b146a98d3c16b87fd4ef274976535036ceb3db0541cfc59457dcedec8b
SSDEEP 12288:ZDddddddddoCh8ahw7TLZ0yph0lhSMXliMsBkW:ZDddddddddoChjhw7CYh0lhSMXlnsx
TLSH
T1C9D49D26B7E940F9D1ABC27889930A16EB737C4643616ACF03E44A675F236D05F3EB11
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

hacktool defendnot

Malware Config

Signatures

Family: Defendnot
Defendnot is a tool designed to disable Microsoft Defender.
hacktool defendnot

Detects Defendnot 1 IoCs

resource	yara_rule
sample	family_defendnot

Untrusted Codesign Signers 1 IoCs

Codesigned file was signed by an untrusted entity.

resource
defendnot-loader.exe

File Explorer

defendnot-loader.exe

.exe 592KB

defendnot-loader.exe

IMPHASH 59d65f5efacbdb1aa2a6cf745b07c058
SHA256 8c3c38781a6e6eb9112b5debfeceaa3c0e9fd20dabf45f3b441ef9926575ba3a
MD5 e547f448b7c0db8f2a5455ad7d70c9d4
SHA1 db10e1083fea3709a1940c662cfe196c149fb640
SHA512 6eaab3b79bb670273643670a8e29831f203b31bd229ab69f3ac085433bc616bfdf0285b146a98d3c16b87fd4ef274976535036ceb3db0541cfc59457dcedec8b
SSDEEP 12288:ZDddddddddoCh8ahw7TLZ0yph0lhSMXliMsBkW:ZDddddddddoChjhw7CYh0lhSMXlnsx
TLSH
T1C9D49D26B7E940F9D1ABC27889930A16EB737C4643616ACF03E44A675F236D05F3EB11
MD5 SHA1 SHA512 SSDEEP TLSH

windows:6 windows x64 arch:x64

Detects Defendnot
Untrusted Codesign Signers

Codesigned file was signed by an untrusted entity.

PE Signature issue

Digest

d0:07:a9:7f:e0:b9:f8:72:b7:ce:10:0a:a6:bd:00:ec:fa:32:cd:18

Digest Algorithm

sha1

PE Digests Matches

Trusted

Not trusted

Signing Certificate

CN=Bio-Tech Medical Software\, Inc,O=Bio-Tech Medical Software\, Inc,L=Fort Lauderdale,ST=Florida,C=US

Chains

Aug 11, 2026

CN=Bio-Tech Medical Software\, Inc,O=Bio-Tech Medical Software\, Inc,L=Fort Lauderdale,ST=Florida,C=US

CN=DigiCert Trusted G4 Code Signing RSA4096 SHA384 2021 CA1,O=DigiCert\, Inc.,C=US

CN=DigiCert Trusted Root G4,OU=www.digicert.com,O=DigiCert Inc,C=US

CN=DigiCert Assured ID Root CA,OU=www.digicert.com,O=DigiCert Inc,C=US

CN=Bio-Tech Medical Software\, Inc,O=Bio-Tech Medical Software\, Inc,L=Fort Lauderdale,ST=Florida,C=US

CN=DigiCert Trusted G4 Code Signing RSA4096 SHA384 2021 CA1,O=DigiCert\, Inc.,C=US

CN=DigiCert Trusted Root G4,OU=www.digicert.com,O=DigiCert Inc,C=US

CN=Bio-Tech Medical Software\, Inc,O=Bio-Tech Medical Software\, Inc,L=Fort Lauderdale,ST=Florida,C=US

CN=DigiCert Trusted G4 Code Signing RSA4096 SHA384 2021 CA1,O=DigiCert\, Inc.,C=US

CN=DigiCert Trusted Root G4,OU=www.digicert.com,O=DigiCert Inc,C=US

Subject

CN=DigiCert Trusted Root G4,OU=www.digicert.com,O=DigiCert Inc,C=US

Serial Number

0e:9b:18:8e:f9:d0:2d:e7:ef:db:50:e2:08:40:18:5a

Issuer

CN=DigiCert Assured ID Root CA,OU=www.digicert.com,O=DigiCert Inc,C=US

Key Usages

KeyUsageDigitalSignature, KeyUsageCertSign, KeyUsageCRLSign

Revocation Status

Not revoked

Timespan

Aug 1, 2022 - Nov 9, 2031

Subject

CN=DigiCert Trusted Root G4,OU=www.digicert.com,O=DigiCert Inc,C=US

Serial Number

05:9b:1b:57:9e:8e:21:32:e2:39:07:bd:a7:77:75:5c

Issuer

CN=DigiCert Trusted Root G4,OU=www.digicert.com,O=DigiCert Inc,C=US

Key Usages

KeyUsageDigitalSignature, KeyUsageCertSign, KeyUsageCRLSign

Timespan

Aug 1, 2013 - Jan 15, 2038

Subject

CN=DigiCert Trusted G4 Code Signing RSA4096 SHA384 2021 CA1,O=DigiCert\, Inc.,C=US

Serial Number

08:ad:40:b2:60:d2:9c:4c:9f:5e:cd:a9:bd:93:ae:d9

Issuer

CN=DigiCert Trusted Root G4,OU=www.digicert.com,O=DigiCert Inc,C=US

Key Usages

KeyUsageDigitalSignature, KeyUsageCertSign, KeyUsageCRLSign

Ext Key Usages

ExtKeyUsageCodeSigning

Revocation Status

Not revoked

Timespan

Apr 29, 2021 - Apr 28, 2036

Subject

CN=DigiCert Trusted G4 TimeStamping RSA4096 SHA256 2025 CA1,O=DigiCert\, Inc.,C=US

Serial Number

0d:c7:ac:57:05:ff:21:99:2e:40:43:22:0c:3a:49:86

Issuer

CN=DigiCert Trusted Root G4,OU=www.digicert.com,O=DigiCert Inc,C=US

Key Usages

KeyUsageDigitalSignature, KeyUsageCertSign, KeyUsageCRLSign

Ext Key Usages

ExtKeyUsageTimeStamping

Revocation Status

Not revoked

Timespan

May 7, 2025 - Jan 14, 2038

Subject

CN=DigiCert SHA256 RSA4096 Timestamp Responder 2025 1,O=DigiCert\, Inc.,C=US

Serial Number

0a:80:ef:18:4b:8d:f1:05:82:d1:c4:76:a7:95:74:68

Issuer

CN=DigiCert Trusted G4 TimeStamping RSA4096 SHA256 2025 CA1,O=DigiCert\, Inc.,C=US

Key Usages

KeyUsageDigitalSignature

Ext Key Usages

ExtKeyUsageTimeStamping

Revocation Status

Not revoked

Timespan

Jun 4, 2025 - Sep 3, 2036

Subject

CN=Bio-Tech Medical Software\, Inc,O=Bio-Tech Medical Software\, Inc,L=Fort Lauderdale,ST=Florida,C=US

Serial Number

08:7f:ae:da:e4:fc:68:4e:21:3e:db:d7:f9:6f:dc:16

Issuer

CN=DigiCert Trusted G4 Code Signing RSA4096 SHA384 2021 CA1,O=DigiCert\, Inc.,C=US

Key Usages

KeyUsageDigitalSignature

Ext Key Usages

ExtKeyUsageCodeSigning

Revocation Status

Not revoked

Timespan

Jul 3, 2022 - Oct 1, 2024

Minor OS version

Major OS version

Entry point

166020

Magic Number

523

Subsystem

IMAGE_SUBSYSTEM_WINDOWS_GUI

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

PDB paths

defendnot-loader.pdb

kernel32

WaitForSingleObject GetModuleHandleA LoadLibraryA CloseHandle GetProcAddress VirtualAllocEx CreateRemoteThread WriteProcessMemory VirtualFreeEx TerminateProcess UnmapViewOfFile CreateFileMappingA MapViewOfFile AllocConsole SetEndOfFile VerifyVersionInfoW VerSetConditionMask GetLastError GetModuleHandleExA CreateProcessA GetModuleFileNameA WriteConsoleW GetProcessHeap SetStdHandle SetEnvironmentVariableW FreeEnvironmentStringsW GetEnvironmentStringsW GetOEMCP GetACP LocalFree FormatMessageA GetLocaleInfoEx CreateFileW FindClose FindFirstFileW FindFirstFileExW FindNextFileW GetFileAttributesExW AreFileApisANSI GetModuleHandleW GetFileInformationByHandleEx MultiByteToWideChar WideCharToMultiByte InitOnceComplete InitOnceBeginInitialize QueryPerformanceCounter QueryPerformanceFrequency ReleaseSRWLockExclusive AcquireSRWLockExclusive SleepConditionVariableSRW Sleep GetCurrentThreadId InitializeCriticalSectionEx GetSystemTimeAsFileTime EnterCriticalSection LeaveCriticalSection DeleteCriticalSection EncodePointer DecodePointer LCMapStringEx GetStringTypeW GetCPInfo WakeAllConditionVariable RtlCaptureContext RtlLookupFunctionEntry RtlVirtualUnwind UnhandledExceptionFilter SetUnhandledExceptionFilter GetCurrentProcess IsProcessorFeaturePresent GetCurrentProcessId InitializeSListHead IsDebuggerPresent GetStartupInfoW RtlUnwindEx RtlPcToFileHeader RaiseException SetLastError InitializeCriticalSectionAndSpinCount TlsAlloc TlsGetValue TlsSetValue TlsFree FreeLibrary LoadLibraryExW ExitProcess GetModuleHandleExW GetCommandLineA GetCommandLineW GetStdHandle WriteFile GetModuleFileNameW HeapAlloc HeapFree FlsAlloc FlsGetValue FlsSetValue FlsFree VirtualProtect CompareStringW LCMapStringW GetLocaleInfoW IsValidLocale GetUserDefaultLCID EnumSystemLocalesW GetFileType GetConsoleOutputCP GetConsoleMode GetFileSizeEx SetFilePointerEx FlushFileBuffers GetExitCodeProcess CreateProcessW ReadFile ReadConsoleW HeapReAlloc HeapSize HeapQueryInformation IsValidCodePage RtlUnwind

advapi32

OpenSCManagerW StartServiceW OpenServiceW QueryServiceStatusEx CloseServiceHandle

ole32

CoCreateInstance CoInitializeEx

oleaut32

SysAllocString VariantInit VariantClear SysFreeString

Name

.text

Size

318KB

Virtual Size

317KB

Characteristics

IMAGE_SCN_CNT_CODE IMAGE_SCN_MEM_EXECUTE IMAGE_SCN_MEM_READ

Name

.rdata

Size

234KB

Virtual Size

233KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.data

Size

7KB

Virtual Size

13KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.pdata

Size

16KB

Virtual Size

16KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.fptable

Size

512B

Virtual Size

256B

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.rsrc

Size

512B

Virtual Size

488B

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.reloc

Size

3KB

Virtual Size

2KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_DISCARDABLE IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

File Explorer

defendnot-loader.exe

PE Signature issue

kernel32

advapi32

ole32

oleaut32

generic