wannacry | f52cfe52b9d638f1154a318f1cd420fce4dc1f57a117fe3452dcef04fd59e5a9

Analysis

max time kernel
150s
max time network
153s
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
f52cfe52b9d638f1154a318f1cd420fce4dc1f57a117fe3452dcef04fd59e5a9.dll
Size 5.0MB
Sample260106-kmsbqsem9t
SHA256 f52cfe52b9d638f1154a318f1cd420fce4dc1f57a117fe3452dcef04fd59e5a9
MD5 65181c60f5659b7e99de3cb6666f4bc2
SHA1 8421682de2f1537ac0fbdffed7b934f280002e16
SHA512 48e5a54fab99d69f8f589c290cef427038e2021f0a1451875ff34e432ab9abebe882b5c6f2dd2e18207582fdffba52faae0c05984853a6b51286af3ceaef49ba
SSDEEP 49152:SnAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdhnvxJM0H9PAME:+DqPoBhz1aRxcSUDk36SAEdhvxWa9P5
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 (3237) 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
4932	mssecsvc.exe
2776	mssecsvc.exe
2856	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
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	mssecsvc.exe
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

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 4860 wrote to memory of 2860	4860	rundll32.exe	77
PID 2860 wrote to memory of 4932	2860	rundll32.exe	78

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\f52cfe52b9d638f1154a318f1cd420fce4dc1f57a117fe3452dcef04fd59e5a9.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4860
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\f52cfe52b9d638f1154a318f1cd420fce4dc1f57a117fe3452dcef04fd59e5a9.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2860
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:4932
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2856

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:2776

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 6bd94993adeed90b4f79b1f68ceb0d5de660552fe8f8cf248e53777a4ba2d8b9
MD5 20c34f7e901da2f3f7ee6eb4faba4c43
SHA1 f8d58fd749c440113a097c7833f2738590008234
SHA512 5cf8536ecafcf1c05bd8ee439a54a60cbb66906e9b79f46a645cb95fc728408085f318be84a4db1d95a5b3847e84a74ff05355771f5ccfafa7c15cb16c63e842
SSDEEP 49152:2nAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdhnvxJM0H9PAMEQ:yDqPoBhz1aRxcSUDk36SAEdhvxWa9P5t
MD5 SHA1 SHA512 SSDEEP

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tasksche.exe

Path C:\Windows\tasksche.exe
Size 3.4MB
SHA256 506c5e58907be79e3b45f40feaf86ad923abd74644cd98c6cae9558eb9eb7083
MD5 1966533a006ec2f95461da502819fed1
SHA1 4e45c1c0e706da5a952c9707fba2e42597d80854
SHA512 66cfdfcca37caf39dcc15cb8a85941f57d41cb6104d33c5e91c8fad2ff7035939337ada762ac4eddcc4055f8d34eeeec8322ab183a8af3ba8e547bbae9d8f259
SSDEEP 49152:nQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdhnvxJM0H9PAMEU:QqPoBhz1aRxcSUDk36SAEdhvxWa9P5B
MD5 SHA1 SHA512 SSDEEP