wannacry | d833fe282b1e263047428433c6f33f41feaa9ef7a58ed184298749f7ede4691d

Analysis

max time kernel
150s
max time network
152s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260618-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260618-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
24/06/2026, 14:36

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General

Target
d833fe282b1e263047428433c6f33f41feaa9ef7a58ed184298749f7ede4691d.dll
Size 5.0MB
Sample260624-rywxmac12j
SHA256 d833fe282b1e263047428433c6f33f41feaa9ef7a58ed184298749f7ede4691d
MD5 c96b8c08aa8c7177a82b22d898eb1d79
SHA1 534c1848e6d7c9e5c8339d9f675191d6e7fa14fc
SHA512 d03ef13c6c510c98c0ebf92ae00b6f2517372ce1ebd8dbc16f4f30620d63f2854ff4fbcec89e4dca8c6f72df46c366d5d3482b80bef700443d0a57cefdf40b72
SSDEEP 49152:RnnMSPbcBVQej/1INRx+TSqTdX1HkQo6SAA:1nPoBhz1aRxcSUDk36SA
TLSH
T10836E115A1E82B64E7F36EB2217B871047797E45889B925E1760A04F0C33F5CDEE2F29
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 (3366) 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
3508	mssecsvr.exe
3472	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

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	mssecsvr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe

Modifies data under HKEY_USERS 5 IoCs

description	ioc	Process
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
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	mssecsvr.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 3016 wrote to memory of 5696	3016	rundll32.exe	88
PID 5696 wrote to memory of 3508	5696	rundll32.exe	89

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\d833fe282b1e263047428433c6f33f41feaa9ef7a58ed184298749f7ede4691d.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3016
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\d833fe282b1e263047428433c6f33f41feaa9ef7a58ed184298749f7ede4691d.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5696
- - C:\WINDOWS\mssecsvr.exe
    C:\WINDOWS\mssecsvr.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:3508

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe -m security
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Modifies data under HKEY_USERS
PID:3472

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

Replay Monitor

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Downloads

mssecsvr.exe

Path C:\Windows\mssecsvr.exe
Size 2.2MB
SHA256 7f0217c69779597860d25facc0882de0f84a47a1917a9d38b05fa6d1aa0e1c6d
MD5 777a8f5c577eed91be31b68f92ce553e
SHA1 40f3e121ed28e97d88b5b133eb1990302a7a2b4e
SHA512 9c83325562e817d6f8fc8477d290a4e779b273cb5b89cc97f23b0d6cd8fdbe20dca010b88f3418016e7052c4d26d11cd736c1229786cf38385e03b59974214b8
SSDEEP 49152:QnnMSPbcBVQej/1INRx+TSqTdX1HkQo6SAAw:QnPoBhz1aRxcSUDk36SAz
TLSH
T122B5E115A1E82B64E7F36EB2217B871047797E45889B925E1760A04F0C33F5CDEE2F29
MD5 SHA1 SHA512 SSDEEP TLSH

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