wannacry | b17755a28babda0fa65a2e6c1ebbc555f3b4bb6b2138cf6654186f11fadc527f

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20260911-en
resource tags

arch:x64arch:x86image:win10v2004-20260911-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
27/10/2026, 01:44

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
b17755a28babda0fa65a2e6c1ebbc555f3b4bb6b2138cf6654186f11fadc527f.dll
Size 5.0MB
Sample261027-b5yrsshx91
SHA256 b17755a28babda0fa65a2e6c1ebbc555f3b4bb6b2138cf6654186f11fadc527f
MD5 c13cfcde708b3bd1fd35d70435f11e5b
SHA1 31bed201627a562493824ddaeffd2365ab85465e
SHA512 5d4446b6cf380740740300f5545f1396b68ba9b7ae43283a77c44714e538dcb79c9c114409777e7d4bdff4681454e1da512ae802de63c23595e326fdb6a6e371
SSDEEP 49152:nnlMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdh:nlPoBhz1aRxcSUDk36SAEdh
TLSH
T11936339971BC92FCD10529B544BB8A23B2B23CAD21FE6E0FDF4089751D43B55BB90B42
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 (3346) 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
1392	mssecsvr.exe
3796	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
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
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	mssecsvr.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 3144 wrote to memory of 3120	3144	rundll32.exe	85
PID 3120 wrote to memory of 1392	3120	rundll32.exe	86

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\b17755a28babda0fa65a2e6c1ebbc555f3b4bb6b2138cf6654186f11fadc527f.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3144
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\b17755a28babda0fa65a2e6c1ebbc555f3b4bb6b2138cf6654186f11fadc527f.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3120
- - 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:1392

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:3796

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

Replay Monitor

Loading Replay Monitor...

Downloads

mssecsvr.exe

Path C:\Windows\mssecsvr.exe
Size 3.6MB
SHA256 4b93340b8a77068d2ac1c74eff0c5d9f2d6405cff3f6a3f6a0151606fbdbc3ce
MD5 603a515b952188afe8deb6902c9ee970
SHA1 2ce6536e3f726b4a85b6e6265ba03a41c9ea3cb3
SHA512 afa792e8dcbf6119bad608f59b415f5170089002cba84ef488796c94f3a26f9df97906e1b26e7a4412216f676e4d2c6bad11751ddd75fefb9317b729216225e2
SSDEEP 49152:4nlMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdh:olPoBhz1aRxcSUDk36SAEdh
TLSH
T1F206339971BC92FCD10529B444BB8A23B6F23CAD21FE6E0F9F4089751D43B55BB90B42
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download