wannacry | 8b4d19736d5c79be56de79705b4769215809c5f728ba455ed2ce0e8c698120cb

Analysis

max time kernel
180s
max time network
181s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
27/04/2026, 23:51

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General

Target
8b4d19736d5c79be56de79705b4769215809c5f728ba455ed2ce0e8c698120cb.dll
Size 5.0MB
Sample260427-3wefcaew5j
SHA256 8b4d19736d5c79be56de79705b4769215809c5f728ba455ed2ce0e8c698120cb
MD5 e419b6230565ab3dceb27b4303e90d0c
SHA1 9e20c01e0760134bb02eee2b6c44a0d21c3d2440
SHA512 546c7d6618c761b1a601916aad1ed09a7522c518988a7056bfc8654d3c2015417e05be50c483c53c93275a3ddc4979c1a55b3c1e761f6ec9ccaccbbbfd105c7c
SSDEEP 49152:SnAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdhnvxJM0H9:+DqPoBhz1aRxcSUDk36SAEdhvxWa9
TLSH
T151363368727CD5FCD10A19B404A7CA67E6B33C6666FE5A0F8F504A660D03B19FB90B43
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 (4193) 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
2424	mssecsvc.exe
944	mssecsvc.exe
3892	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 608 wrote to memory of 2232	608	rundll32.exe	79
PID 2232 wrote to memory of 2424	2232	rundll32.exe	80

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\8b4d19736d5c79be56de79705b4769215809c5f728ba455ed2ce0e8c698120cb.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:608
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\8b4d19736d5c79be56de79705b4769215809c5f728ba455ed2ce0e8c698120cb.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2232
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:2424
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:3892

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:944

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 2d8e2868665a26da12c6108f7c447a7f2d13b79db3a39bb6a5bba1be4cda0e95
MD5 6dc6a233d2b0c76e7c7cfed331411b1c
SHA1 fffb8f8a9eab454beff247d043e2b728b1a6a31e
SHA512 3b34bc2d18a6a5c4281d601323d87ebb379705600369a2545f2cbfede18363bd73a81d956ff9a1d5a48b086317b019eb213e2fd44d59038898d0dde898d34fb1
SSDEEP 49152:2nAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdhnvxJM0H9:yDqPoBhz1aRxcSUDk36SAEdhvxWa9
TLSH
T1E4063368717CD5FCD10A19B404A7CA67E6B33C6666FE5A0F8F508A660D03B19FB90B43
MD5 SHA1 SHA512 SSDEEP TLSH

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tasksche.exe

Path C:\Windows\tasksche.exe
Size 3.4MB
SHA256 08622317752082b2fc5961ab6a0f8a4b6f01c6ce1a32c3d531784962576fae19
MD5 4772f0d7a23325a7f8d7e97ca9345b2f
SHA1 b189423c02d1731761090c70c0e2236d1d1bd4dd
SHA512 5d6f0275e894efe176e1893542bc00d921b3f50bd69876e34800a3d9411c3192cc7eb794017c03079beab08fdcafb38a6660ff41c111aaf6753942a9645f6edb
SSDEEP 49152:nQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdhnvxJM0H9:QqPoBhz1aRxcSUDk36SAEdhvxWa9
TLSH
T181F533B8B131FBACE30A1CF91497C597669625B27AEF2E16CF5005A71C01E2EDFC0586
MD5 SHA1 SHA512 SSDEEP TLSH