wannacry | 11ca820497e0518e06e32645eff0362ef3e89c8720293b329bb28fa7291dbd91

Analysis

max time kernel
150s
max time network
151s
platform
windows11-21h2_x64
resource
win11-20251231-en
resource tags

arch:x64arch:x86image:win11-20251231-enlocale:en-usos:windows11-21h2-x64system
submitted
06/01/2026, 08:43

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General

Target
11ca820497e0518e06e32645eff0362ef3e89c8720293b329bb28fa7291dbd91.dll
Size 5.0MB
Sample260106-kmvrvsymcw
SHA256 11ca820497e0518e06e32645eff0362ef3e89c8720293b329bb28fa7291dbd91
MD5 7df7d02f32df940c941035e2a8346b8d
SHA1 d94c5826cdfaca78684ef088be250171c87c9409
SHA512 e24c563bf224e32660c04e53b05e30396625bf2b7d88bbb0600b6ad0b6c745c3d19ff335fdf2f6a74fdd057baf44b4470f48f9542cbd789bf5aa590b18a263eb
SSDEEP 98304:+DqPoBhz1aRxcSUDk36SAEdhvxWa9P58M:+DqPe1Cxcxk3ZAEUadx
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

discovery wannacry ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Wannacry family
wannacry
Contacts a large (3335) 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
3688	mssecsvc.exe
5168	mssecsvc.exe
5100	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

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 5004 wrote to memory of 3616	5004	rundll32.exe	77
PID 3616 wrote to memory of 3688	3616	rundll32.exe	78

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\11ca820497e0518e06e32645eff0362ef3e89c8720293b329bb28fa7291dbd91.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:5004
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\11ca820497e0518e06e32645eff0362ef3e89c8720293b329bb28fa7291dbd91.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3616
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:3688
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:5100

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Modifies data under HKEY_USERS
PID:5168

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

mssecsvc.exe

Path C:\Windows\mssecsvc.exe
Size 3.6MB
SHA256 a4eb9ece9d9e4b270b8e383d858cc0c0465e6e9bc64e00bb8010afc0b9058493
MD5 e6503643b6bfe95c07e31e12df6b6c2d
SHA1 05787db3eed46a18182b7c7c802ea8f3f95b811a
SHA512 497b25954dfc8d0a9963b36e255ba12a98f2b607486f93822009c2ddff912080651cfebeb0ad13d9af007422c783a214a1403d0a5b8472eb52ca4672648c043f
SSDEEP 98304:yDqPoBhz1aRxcSUDk36SAEdhvxWa9P58MV:yDqPe1Cxcxk3ZAEUadxV
MD5 SHA1 SHA512 SSDEEP

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tasksche.exe

Path C:\Windows\tasksche.exe
Size 3.4MB
SHA256 cfd0c651098ada1f643e58d478f44f95fdb1c337399ee8e8d0650377b04ef6a1
MD5 943ae408895df1dc0c69170a585d4872
SHA1 5e578bde0aeb7180e4dd0ecd3411399463a5842c
SHA512 d3a6b50a54aa06d9915382dff29fad4c76ee4a67673791249009e0163288229175d36f2e330dc3cd0b2694aa925d15f8c60b7ff3cc2a2a824ce5cc4144d940e8
SSDEEP 98304:QqPoBhz1aRxcSUDk36SAEdhvxWa9P58Mt:QqPe1Cxcxk3ZAEUadxt
MD5 SHA1 SHA512 SSDEEP