wannacry | 816d74c4e22f2960b7c65cd43fc5439e6794f7364057cd7ba790395d1fe9b6a7

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, 00:04

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General

Target
816d74c4e22f2960b7c65cd43fc5439e6794f7364057cd7ba790395d1fe9b6a7.dll
Size 5.0MB
Sample261027-acmndscc62
SHA256 816d74c4e22f2960b7c65cd43fc5439e6794f7364057cd7ba790395d1fe9b6a7
MD5 4eab736743fbed0f521e06803e02424f
SHA1 b504a305ff59ae8664d3ff8fde22211223c2c8bf
SHA512 958e5750ec2c41e38f30ff3edef4d92c23a460b9e76520d9783f4780c990b8d21f061539e13e949573fe7a8c1a3fd0b4eead8b7618f842ec150c9cc80cfc7b94
SSDEEP 49152:RnsQqMSPbcBV2NRx+TSqTdX1HkQo6SAARdhn:1/qPoBKRxcSUDk36SAEdh
TLSH
T12E36221872ECA378E3736DB11077861167B17C9A98EB874F47A0958A1C23F54FBB1B06
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 (3369) 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
1664	mssecsvr.exe
5352	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\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
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	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 4176 wrote to memory of 1220	4176	rundll32.exe	89
PID 1220 wrote to memory of 1664	1220	rundll32.exe	90

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\816d74c4e22f2960b7c65cd43fc5439e6794f7364057cd7ba790395d1fe9b6a7.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4176
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\816d74c4e22f2960b7c65cd43fc5439e6794f7364057cd7ba790395d1fe9b6a7.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1220
- - 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:1664

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:5352

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 2.2MB
SHA256 d902f009ffe40c21f0fce0db6dd91ca652da324f55dd178227ca9ee84b3dc321
MD5 304ace8bf72f9928416f5d3e96b99d32
SHA1 e0a8fedea3b36735a259be58601ce4d985772782
SHA512 e3dca8f9a24cdd61b87a435aa65905e5f15642ee466b7d6b135507661734f098935f504116287f255dc6bb733a2ee28863a9981473c7bb8e9f911baef4ccbb62
SSDEEP 49152:QnsQqMSPbcBV2NRx+TSqTdX1HkQo6SAARdhnq:Q/qPoBKRxcSUDk36SAEdhq
TLSH
T173B5231872ECA378E7736DB11077861157B17C9A98EB874F47A0958A1C23F94FBB1B02
MD5 SHA1 SHA512 SSDEEP TLSH

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