wannacry | 0bc399b04f1be33f682a0c027a2533cbef5e92553092f75f5daebb21b4b48044

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, 07:32

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General

Target
0bc399b04f1be33f682a0c027a2533cbef5e92553092f75f5daebb21b4b48044.dll
Size 5.0MB
Sample260106-jc67gaev2d
SHA256 0bc399b04f1be33f682a0c027a2533cbef5e92553092f75f5daebb21b4b48044
MD5 0644c067fee2dd9c9e4983baca8fa63f
SHA1 f2f09cfad9249f087bc078519560bd0958cfd67f
SHA512 60462225ef87d1a0876e3a3c90823598603985364bd0d2bf233a7e6cf3fd8427009fa8171db1a76e6b29a4b316affe6802d53c89d7dce86b65f9a94b4621b28a
SSDEEP 98304:+DqPoBhz1aRxcSUDk36SAEdhvxWa9P593RyyAVp2H:+DqPe1Cxcxk3ZAEUadzRyyc4H
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 (3321) 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
4804	mssecsvc.exe
388	mssecsvc.exe
4636	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 4668 wrote to memory of 4756	4668	rundll32.exe	77
PID 4756 wrote to memory of 4804	4756	rundll32.exe	78

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\0bc399b04f1be33f682a0c027a2533cbef5e92553092f75f5daebb21b4b48044.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4668
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\0bc399b04f1be33f682a0c027a2533cbef5e92553092f75f5daebb21b4b48044.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4756
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:4804
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:4636

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:388

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 9783a0f367c8f60427ae2ce892a0206e29a43e0f6a18e4fe96cbac944679d601
MD5 129f0b6f554ba8ae710edce7f5df4b2c
SHA1 9a18ab0d1c6709d45d6eed3a10ffe670fbb48d4e
SHA512 1c0937be7f373937ef5b3decceff4a98e92e7e6b09560e683d66cff3a1e0ab447acb1513b718159c24449469afc2af19da67e943b37fe43341ef9de000333aff
SSDEEP 98304:yDqPoBhz1aRxcSUDk36SAEdhvxWa9P593RyyAVp2HI:yDqPe1Cxcxk3ZAEUadzRyyc4HI
MD5 SHA1 SHA512 SSDEEP

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tasksche.exe

Path C:\Windows\tasksche.exe
Size 3.4MB
SHA256 b9575f1df887579729430ac7ddc8cb41ea1c26bd8ddd4787bc2ddb3c09003063
MD5 b693287ba9ecfc09b8f33e900bc0e21c
SHA1 a35bbfb86a8300b2d6512b6f34c1f3c25d252968
SHA512 35d7e94617c9af3cbf5361c16be3a458bc36c279f672aa618af004eadba349bfc4b821a51e5e01a0001abbaf47c8611f0ee9809c7c75702a64aa53f83da48f72
SSDEEP 98304:QqPoBhz1aRxcSUDk36SAEdhvxWa9P593RyyAVp2Hj:QqPe1Cxcxk3ZAEUadzRyyc4Hj
MD5 SHA1 SHA512 SSDEEP