wannacry | 90cd877a07ecebf5f41c4b93da10765d44fc0c347959a06b4d5859306eca4259

Analysis

max time kernel
150s
max time network
152s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
27/10/2026, 00:49

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General

Target
90cd877a07ecebf5f41c4b93da10765d44fc0c347959a06b4d5859306eca4259.dll
Size 5.0MB
Sample261027-a6e6eaav5l
SHA256 90cd877a07ecebf5f41c4b93da10765d44fc0c347959a06b4d5859306eca4259
MD5 d503ed00ae125e04ee982c906596ae1b
SHA1 ee4d1906fde484a274b85d50bca0ae2de39e5ca2
SHA512 e463473e1505be37eb244760f0c4ef1e9b14f01d3add51e9027ba12ef8e56013ec1b57ed44b2aed0fa1dd5f38b223d53736e674960622f28f3bcd1e2b54edda8
SSDEEP 24576:zbLgddQhfdmMSirYbcMNgef0QeQjG/D8kIqRY:znAQqMSPbcBVQej/1
TLSH
T1223623557A6C80FCE12662356473C936C6B73C9A2578960F8BD48E2B3C23B54EE94F13
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery wannacry ransomware worm

Malware Config

Signatures

Family: Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3366) amount of remote hosts 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046

Executes dropped EXE 3 IoCs

pid	Process
2948	mssecsvc.exe
4864	mssecsvc.exe
2108	tasksche.exe

Creates a large amount of network flows 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\WINDOWS\mssecsvc.exe	rundll32.exe
File created	C:\WINDOWS\tasksche.exe	mssecsvc.exe

Reads the TCP/IP host and domain name from the registry 1 TTPs 4 IoCs

The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

discovery

System Network Configuration Discovery

T1016

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	mssecsvc.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	mssecsvc.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	mssecsvc.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	mssecsvc.exe

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvc.exe

Modifies data under HKEY_USERS 5 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	mssecsvc.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 5128 wrote to memory of 2156	5128	rundll32.exe	89
PID 2156 wrote to memory of 2948	2156	rundll32.exe	90

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\90cd877a07ecebf5f41c4b93da10765d44fc0c347959a06b4d5859306eca4259.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:5128
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\90cd877a07ecebf5f41c4b93da10765d44fc0c347959a06b4d5859306eca4259.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2156
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - Reads the TCP/IP host and domain name from the registry
    - System Location Discovery: System Language Discovery
    PID:2948
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2108

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Reads the TCP/IP host and domain name from the registry
- System Location Discovery: System Language Discovery
- Modifies data under HKEY_USERS
PID:4864

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

mssecsvc.exe

Path C:\Windows\mssecsvc.exe
Size 3.6MB
SHA256 aa94f0d3558d6c2d68b2a8079536cae2b0a9b7add9df06c8e63f9914e82dcda8
MD5 cb1375ac0e89b74075ad6af0dbebdbae
SHA1 ea2f8b24a5dad619cc15d0170755e0c6b2e4af53
SHA512 ce354631299a9f79f5731065da13979dece64546bc01ce133e40aecf9f27b1e4c8850e765e214d995f16ba89afdc40fbbad9b9c7caed5b41fa5f5c015f014aec
SSDEEP 24576:XbLgddQhfdmMSirYbcMNgef0QeQjG/D8kIqRYs:XnAQqMSPbcBVQej/15
TLSH
T173062359796C80FCE12662356473C936C6B73C9A2578960F8BD48E2B3C23B54EE94F13
MD5 SHA1 SHA512 SSDEEP TLSH

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tasksche.exe

Path C:\Windows\tasksche.exe
Size 3.4MB
SHA256 99429f4e11ec0eb3828dde67ccc4f445a75a095badbe4a448c5efaacacb52177
MD5 288f370e688f13f46573238f7f3340eb
SHA1 a690e5e2595a58beb66ce7b93a1eea5a483b3320
SHA512 7ff0c8d8d3118f29ceb6c943c6d6d6a7b4f6c9666ea2dbf427c32a57dcbae6e5a2c773f9cfc1b555a007a19e86402cb1a1179a14b185d2f1601f637ece0f151a
SSDEEP 24576:nQhfdmMSirYbcMNgef0QeQjG/D8kIqRYP:nQqMSPbcBVQej/1a
TLSH
T191F523A5797023ACF3362A393477C873056B3DD274996A0B8AC01D5B7C26F58CF81A67
MD5 SHA1 SHA512 SSDEEP TLSH