wannacry | 7440d8eaa7a1eb499a0a838f3af936cbb5616a67944412fa9f40f609e1fd32ce

Analysis

max time kernel
150s
max time network
155s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
02/10/2026, 05:46

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General

Target
7440d8eaa7a1eb499a0a838f3af936cbb5616a67944412fa9f40f609e1fd32ce.dll
Size 5.0MB
Sample261002-ggmbrazamd
SHA256 7440d8eaa7a1eb499a0a838f3af936cbb5616a67944412fa9f40f609e1fd32ce
MD5 8809a6b7a2921ac5b91cfc9bf3f25935
SHA1 ffcee280bcecb6e332ffd7f2e1b513317cd25d11
SHA512 df4eaff369f445f1714f7ca924b347e377adc8c1a8d57a0fb7f8145c3178eeb1961c3dc9b4a57538b0c66c8e7a0b62f064bbacd591478157f386176824248b84
SSDEEP 98304:nlqPoBhzHxcSUDk36SAEdhvxWa9P593R8yAVp2H:nlqPeHxcxk3ZAEUadzR8yc4H
TLSH
T109363358616CA1FCF0490EB444638A1A77B73C6967BE4F1FDBC086660D13B6BABD0A41
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 (3355) 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
2948	mssecsvr.exe
4488	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

Reads the TCP/IP host and domain name from the registry 1 TTPs 4 IoCs

The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

discovery

System Network Configuration Discovery

T1016

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	mssecsvr.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	mssecsvr.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	mssecsvr.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	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	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvr.exe

Modifies data under HKEY_USERS 5 IoCs

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

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 2856 wrote to memory of 4832	2856	rundll32.exe	89
PID 4832 wrote to memory of 2948	4832	rundll32.exe	90

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\7440d8eaa7a1eb499a0a838f3af936cbb5616a67944412fa9f40f609e1fd32ce.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2856
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\7440d8eaa7a1eb499a0a838f3af936cbb5616a67944412fa9f40f609e1fd32ce.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4832
- - C:\WINDOWS\mssecsvr.exe
    C:\WINDOWS\mssecsvr.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - Reads the TCP/IP host and domain name from the registry
    - System Location Discovery: System Language Discovery
    PID:2948

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe -m security
1⤵
- Executes dropped EXE
- Reads the TCP/IP host and domain name from the registry
- System Location Discovery: System Language Discovery
- Modifies data under HKEY_USERS
PID:4488

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

System Network Configuration Discovery

T1016

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

mssecsvr.exe

Path C:\Windows\mssecsvr.exe
Size 3.6MB
SHA256 4df83d556a9341a4459794b6df763e5d2905eaabc3e1b6a295f489509c9e2968
MD5 08d12c763670ca29c6a69da13550bf3b
SHA1 fb6a695c6fdb8d73b4e8d3a2a4f88f72e4f825da
SHA512 61ea7cc0af3cc34588332b82f5256c772b842768531bc9567378df9bc4359cc33164fa2004097409d7bed1477b54c511e2bdf1bf82f2c993f068094690335e6e
SSDEEP 98304:olqPoBhzHxcSUDk36SAEdhvxWa9P593R8yAVp2HI:olqPeHxcxk3ZAEUadzR8yc4HI
TLSH
T1B7063358612CA2FCF1590DB844638A1A73B73C6967BE4F1FDBC086660D13F67ABD0A41
MD5 SHA1 SHA512 SSDEEP TLSH

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