stormser | 2026-08-21_1f97f733def3737a7f3db30e3ef05ae4_elex_remcos_wannacry

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General

Target
2026-08-21_1f97f733def3737a7f3db30e3ef05ae4_elex_remcos_wannacry
Size 79KB
Sample260822-wp566aaq31
SHA256 acf71256cafb1ae458ae212fd44aae8efedd22ffd8135a67d47a534752667e26
MD5 1f97f733def3737a7f3db30e3ef05ae4
SHA1 bab414d34e4e4423a90f40ba2ce11db96079d75d
SHA512 9a96218e390e9e53f80239c8f525104184ccbb86d03848b8082f1ef4b0cd5ef756677b9c62b1e618a48a29e7490a2ce2f69bd1c822dc33f5de2ebc767c1b9dce
SSDEEP 768:4vw9816vhKQLrox4/wQpWMZ3XOQ69zbjlAAX5e9zz:wEGh0oxloWMZ3izbR9Xwzz
TLSH
T169834BC38E6C6483FE96297012A8DAB77D3E97C65544B9976F90FC5808A33C1EB3811D
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

worm stormser

Malware Config

Signatures

Family: Stormser, StormDDoS, StormAttack, Stormer
Stormser aka StormDDoS, StormAttack, and Stormer is a Windows worm written in C++.
worm stormser

Detects Stormser aka Storm DDoS and StormAttack 1 IoCs

resource	yara_rule
sample	family_stormser

Detects Windows executables referencing non-Windows User-Agents 1 IoCs

resource	yara_rule
sample	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

Codesign digest Mismatch 1 IoCs

File was altered after it was signed.

resource
2026-08-21_1f97f733def3737a7f3db30e3ef05ae4_elex_remcos_wannacry

File Explorer

2026-08-21_1f97f733def3737a7f3db30e3ef05ae4_elex_remcos_wannacry

.exe 79KB

2026-08-21_1f97f733def3737a7f3db30e3ef05ae4_elex_remcos_wannacry

IMPHASH ba23a556ac1d6444f7f76feafd6c8867
SHA256 acf71256cafb1ae458ae212fd44aae8efedd22ffd8135a67d47a534752667e26
MD5 1f97f733def3737a7f3db30e3ef05ae4
SHA1 bab414d34e4e4423a90f40ba2ce11db96079d75d
SHA512 9a96218e390e9e53f80239c8f525104184ccbb86d03848b8082f1ef4b0cd5ef756677b9c62b1e618a48a29e7490a2ce2f69bd1c822dc33f5de2ebc767c1b9dce
SSDEEP 768:4vw9816vhKQLrox4/wQpWMZ3XOQ69zbjlAAX5e9zz:wEGh0oxloWMZ3izbR9Xwzz
TLSH
T169834BC38E6C6483FE96297012A8DAB77D3E97C65544B9976F90FC5808A33C1EB3811D
MD5 SHA1 SHA512 SSDEEP TLSH

windows:4 windows x86 arch:x86

Detects Stormser aka Storm DDoS and StormAttack
Detects Windows executables referencing non-Windows User-Agents
Codesign digest Mismatch

File was altered after it was signed.

PE Signature issue

Digest

25:d9:19:b6:da:ce:72:19:39:f3:84:f1:d7:5b:10:d9:57:e2:b7:fb:aa:32:29:0c:91:da:56:3c:ed:d8:31:59

Digest Algorithm

sha256

PE Digests Matches

Not matched

Trusted

Signing Certificate

CN=Microsoft Corporation,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

Chains

Jun 11, 2022

CN=Microsoft Corporation,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

CN=Microsoft Code Signing PCA 2011,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

CN=Microsoft Root Certificate Authority 2011,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

PE Signature issue

Digest

25:d9:19:b6:da:ce:72:19:39:f3:84:f1:d7:5b:10:d9:57:e2:b7:fb:aa:32:29:0c:91:da:56:3c:ed:d8:31:59

Digest Algorithm

sha256

PE Digests Matches

Not matched

Trusted

Signing Certificate

CN=Microsoft Corporation,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

Chains

Jun 11, 2022

CN=Microsoft Corporation,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

CN=Microsoft Code Signing PCA 2010,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

CN=Microsoft Root Certificate Authority 2010,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

Subject

CN=Microsoft Corporation,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

Serial Number

33:00:00:04:39:f6:1f:7a:67:6d:a0:00:af:00:00:00:00:04:39

Issuer

CN=Microsoft Code Signing PCA 2010,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

Ext Key Usages

ExtKeyUsageCodeSigning

Timespan

Sep 2, 2021 - Sep 1, 2022

Subject

CN=Microsoft Code Signing PCA 2010,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

Serial Number

61:0c:52:4c:00:00:00:00:00:03

Issuer

CN=Microsoft Root Certificate Authority 2010,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

Key Usages

KeyUsageDigitalSignature, KeyUsageCertSign, KeyUsageCRLSign

Timespan

Jul 6, 2010 - Jul 6, 2025

Subject

CN=Microsoft Time-Stamp Service,OU=Microsoft America Operations+OU=Thales TSS ESN:3BBD-E338-E9A1,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

Serial Number

33:00:00:01:9d:fe:89:e5:f9:7b:bb:4c:c0:00:01:00:00:01:9d

Issuer

CN=Microsoft Time-Stamp PCA 2010,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

Ext Key Usages

ExtKeyUsageTimeStamping

Timespan

Dec 2, 2021 - Feb 28, 2023

Subject

CN=Microsoft Time-Stamp PCA 2010,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

Serial Number

33:00:00:00:15:c5:e7:6b:9e:02:9b:49:99:00:00:00:00:00:15

Issuer

CN=Microsoft Root Certificate Authority 2010,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

Key Usages

KeyUsageDigitalSignature, KeyUsageCertSign, KeyUsageCRLSign

Ext Key Usages

ExtKeyUsageTimeStamping

Timespan

Sep 30, 2021 - Sep 30, 2030

Subject

CN=Microsoft Corporation,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

Serial Number

33:00:00:02:55:18:1d:a4:2e:e0:86:fc:15:00:00:00:00:02:55

Issuer

CN=Microsoft Code Signing PCA 2011,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

Ext Key Usages

ExtKeyUsageCodeSigning

Timespan

Sep 2, 2021 - Sep 1, 2022

Subject

CN=Microsoft Code Signing PCA 2011,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

Serial Number

61:0e:90:d2:00:00:00:00:00:03

Issuer

CN=Microsoft Root Certificate Authority 2011,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

Key Usages

KeyUsageDigitalSignature, KeyUsageCertSign, KeyUsageCRLSign

Timespan

Jul 8, 2011 - Jul 8, 2026

Subject

CN=Microsoft Time-Stamp Service,OU=Microsoft America Operations+OU=Thales TSS ESN:EACE-E316-C91D,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

Serial Number

33:00:00:01:9a:c0:75:a2:c4:21:6d:3e:85:00:01:00:00:01:9a

Issuer

CN=Microsoft Time-Stamp PCA 2010,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

Ext Key Usages

ExtKeyUsageTimeStamping

Timespan

Dec 2, 2021 - Feb 28, 2023

Minor OS version

Major OS version

Entry point

9844

Magic Number

267

Subsystem

IMAGE_SUBSYSTEM_WINDOWS_GUI

DLL Characteristics

File Characteristics

IMAGE_FILE_RELOCS_STRIPPED IMAGE_FILE_EXECUTABLE_IMAGE IMAGE_FILE_LINE_NUMS_STRIPPED IMAGE_FILE_LOCAL_SYMS_STRIPPED IMAGE_FILE_32BIT_MACHINE

PDB paths

kernel32

lstrcatA lstrcpyA GetEnvironmentVariableA GetShortPathNameA GetModuleFileNameA GetLastError SetFileAttributesA CopyFileA CloseHandle GetCurrentProcess CreateFileA GlobalFree LockResource GlobalAlloc LoadResource SizeofResource FindResourceA SetPriorityClass GetCurrentThread SetThreadPriority ResumeThread Sleep GetStartupInfoA CreateProcessA lstrlenA VirtualAllocEx WriteProcessMemory GetModuleHandleA GetProcAddress CreateRemoteThread GetSystemWindowsDirectoryA GetSystemDirectoryA WriteFile

user32

MessageBoxA

comdlg32

GetFileTitleA

advapi32

CloseServiceHandle RegOpenKeyExA RegQueryValueExA StartServiceCtrlDispatcherA RegCreateKeyA RegisterServiceCtrlHandlerA SetServiceStatus RegOpenKeyA RegDeleteValueA RegSetValueExA RegCloseKey OpenServiceA CreateServiceA OpenSCManagerA StartServiceA

ole32

CoUninitialize CoCreateGuid CoInitialize

mfc42

ord924 ord800 ord941 ord535 ord537

msvcrt

_controlfp __set_app_type __CxxFrameHandler _snprintf free fwrite fclose fread malloc ftell fseek fopen exit strstr strncmp _except_handler3 __dllonexit _onexit _exit _XcptFilter _acmdln __getmainargs _initterm __setusermatherr _adjust_fdiv __p__commode __p__fmode

msvcp60

??0_Winit@std@@QAE@XZ ??1_Winit@std@@QAE@XZ ??1Init@ios_base@std@@QAE@XZ ??0Init@ios_base@std@@QAE@XZ

Sharing

General

Malware Config

Signatures

File Explorer

2026-08-21_1f97f733def3737a7f3db30e3ef05ae4_elex_remcos_wannacry

PE Signature issue

PE Signature issue

kernel32

user32

comdlg32

advapi32

ole32

mfc42

msvcrt

msvcp60

generic