wannacry | c4f29191f6c0e1ffae182f9e513c429458cf18b31446c4ed1c1e2a3762448a0e

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, 02:34

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General

Target
c4f29191f6c0e1ffae182f9e513c429458cf18b31446c4ed1c1e2a3762448a0e.dll
Size 5.0MB
Sample261027-c2sxta1sdw
SHA256 c4f29191f6c0e1ffae182f9e513c429458cf18b31446c4ed1c1e2a3762448a0e
MD5 64d4be9a847114435a642c1bff6ab25b
SHA1 91a52f0aa46fcb8e25d2b4195e3fd69d6eb4b2f6
SHA512 a55f643b59ab0865f877c8d118b7f450a7b2073085a8deeb1cdf0d69ceb151e704e345169cf98f9fc9667fd3b44135dab4651409caa5fe57e8ee4f0cd9c0114b
SSDEEP 98304:nfPoBhz1aRxcSUDk36SAEdhvxWa9P59Uc/J:nfPe1Cxcxk3ZAEUadv
TLSH
T1B0362322F11861B5E5A219F404EEAB12E1BE3C2413B795C7AB50467A5C227F77730F8B
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 (3351) 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
3612	mssecsvr.exe
4352	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 5840 wrote to memory of 4556	5840	rundll32.exe	89
PID 4556 wrote to memory of 3612	4556	rundll32.exe	90

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\c4f29191f6c0e1ffae182f9e513c429458cf18b31446c4ed1c1e2a3762448a0e.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:5840
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\c4f29191f6c0e1ffae182f9e513c429458cf18b31446c4ed1c1e2a3762448a0e.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4556
- - 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:3612

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:4352

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 d23259d8c52f7682b6f1202bc5b6a5fe137a81e5e5e2c0f17946e0821f8fc248
MD5 dc9e0516f39f59b1f8fc597042bd6caf
SHA1 04a756ab3d735ae705f4d55df7aabbbd1f4065e1
SHA512 420668b9980422a4b4927c395c1b7b07fcd81775fd848b1fbcf0a8077bb46889a7e9d779902c55b6da5d95586fac798eeba36884c9a2a7a8eac8ac1c53d5db7c
SSDEEP 98304:ofPoBhz1aRxcSUDk36SAEdhvxWa9P59Uc/Jf:ofPe1Cxcxk3ZAEUadv1
TLSH
T1D1062322E11861B5E5A319F404EEAB12E1BE3C2413B795C7AB50467A5C227F77730F8B
MD5 SHA1 SHA512 SSDEEP TLSH

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