wannacry | e04e1927fe826c3178e5e0bd20a6230906d560531f43755aa5c4947130e21eac

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
02/11/2026, 10:15

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General

Target
e04e1927fe826c3178e5e0bd20a6230906d560531f43755aa5c4947130e21eac.dll
Size 5.0MB
Sample261102-maftaavt2q
SHA256 e04e1927fe826c3178e5e0bd20a6230906d560531f43755aa5c4947130e21eac
MD5 bc3bc8b596498c7d44d10a183b284051
SHA1 bd3a996631a337d2951066f44a03b9a96c102ae5
SHA512 eedb33e0d4cc5467ba965b7435cf7c6dfac4e096213c15d7e8584179711e607e18fdd853a144ef8cb7259853ad9350f6cbf0ea0a78f79e7f7e4b7bd0952651b8
SSDEEP 49152:unsEMSPbcBVQej/Q6SAARdhnvxJM0H9PAMEcaEa:afPoBhzQ6SAEdhvxWa9P5
TLSH
T11F365913A7EC025AF6F35B39E57664519937BDCA2836D20C10A4265E0EB3F218CA177F
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 (3336) 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 2 IoCs

pid	Process
4664	mssecsvr.exe
1048	mssecsvr.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\mssecsvr.exe	rundll32.exe
File created	C:\WINDOWS\tasksche.exe	mssecsvr.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\Domain	mssecsvr.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	mssecsvr.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	mssecsvr.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	mssecsvr.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	mssecsvr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvr.exe

Modifies data under HKEY_USERS 5 IoCs

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

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 2656 wrote to memory of 4404	2656	rundll32.exe	89
PID 4404 wrote to memory of 4664	4404	rundll32.exe	90

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\e04e1927fe826c3178e5e0bd20a6230906d560531f43755aa5c4947130e21eac.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2656
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\e04e1927fe826c3178e5e0bd20a6230906d560531f43755aa5c4947130e21eac.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4404
- - C:\WINDOWS\mssecsvr.exe
    C:\WINDOWS\mssecsvr.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:4664

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.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:1048

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

mssecsvr.exe

Path C:\Windows\mssecsvr.exe
Size 3.6MB
SHA256 7d933e9d3c205ba93d7aeecd7c2a450246d6674760923aa4ce5f3b77d004298e
MD5 135b9d316ba43b68a0d9c4c375294705
SHA1 f1ad84dcaf171bdd6bb96505785a276fa6e5b287
SHA512 944194acd6c9cea7da3c5a2f904123e252dabfbe550867648fe6308fd72e7310149912745e5baaa2a956b3f09c9a650fcbaabc66f055a18c886fe45bba67d11f
SSDEEP 49152:tnsEMSPbcBVQej/Q6SAARdhnvxJM0H9PAMEcaEaS:hfPoBhzQ6SAEdhvxWa9P5h
TLSH
T1C9065913A7EC025AF6F35B39E57664519937BDCA2836D20C10A4265E0EB3F218CA177F
MD5 SHA1 SHA512 SSDEEP TLSH

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