wannacry | 83dfe11daf3dff27f14f9ff07aeecb55cf81a3b4cfa171fe1a5cda02e120f781

Analysis

max time kernel
180s
max time network
181s
platform
windows10-2004_x64
resource
win10v2004-20260130-en
resource tags

arch:x64arch:x86image:win10v2004-20260130-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
27/04/2026, 23:34

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General

Target
83dfe11daf3dff27f14f9ff07aeecb55cf81a3b4cfa171fe1a5cda02e120f781.dll
Size 5.0MB
Sample260427-3kd1faev8k
SHA256 83dfe11daf3dff27f14f9ff07aeecb55cf81a3b4cfa171fe1a5cda02e120f781
MD5 921e8c0ab3b5bebd6029bb4bd2b1582a
SHA1 ba9d6a085102f3472f40b30510bb8dffae73cd34
SHA512 ce11a77f419c665bd1312f9b5b674f0a7a624aaad11269b8dc9d1e4739532c420ff5751e54bb4850bcacd2c36399619cbf33addba77c40063352b233f0333f0f
SSDEEP 49152:RnsUMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdhnv:1jPoBhz1aRxcSUDk36SAEdhv
TLSH
T165363399717C91FCC1062AB4C7AB8E23A2B27C6E15FE5B0F9F4049761F03B59B750A42
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 (3596) 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
4564	mssecsvr.exe
5484	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	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 12 IoCs

description	ioc	Process
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion	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\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\P3P\History	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\P3P	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 4100 wrote to memory of 5628	4100	rundll32.exe	84
PID 5628 wrote to memory of 4564	5628	rundll32.exe	85

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\83dfe11daf3dff27f14f9ff07aeecb55cf81a3b4cfa171fe1a5cda02e120f781.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4100
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\83dfe11daf3dff27f14f9ff07aeecb55cf81a3b4cfa171fe1a5cda02e120f781.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5628
- - C:\WINDOWS\mssecsvr.exe
    C:\WINDOWS\mssecsvr.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:4564

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:5484

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 75f6d85b28b37ea8bf4a2425a78dd6e42b6c45be5fd98adcf482ab96b47fbe13
MD5 ce1466dc9fbf26523547b8f98aca803a
SHA1 b80c6f29b8d9aa6e607bf58fd1a84909ceb7192a
SHA512 7c4de9cc2657b9299d0d76bdbc2c792e614f56748c6fa55435d6095a44009410eee610186c55605eb430dbe94a96e770a98cb4ea416b0d2224ee9ad5005ed8bf
SSDEEP 49152:QnsUMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdhnvn:QjPoBhz1aRxcSUDk36SAEdhvn
TLSH
T119B53399717C91FCC1052AB4C7AB8E23E2B27C6E15FE5B0B9F4089761F03B59B750A42
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/5628-4-0x0000000000F80000-0x0000000001007000-memory.dmp

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