wannacry | f1ba28b861a8abf72b37e902121cd2506cea2b7323adba98c5426dcaa71fffc7

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20260130-en
resource tags

arch:x64arch:x86image:win10v2004-20260130-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
11/03/2026, 17:46

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General

Target
f1ba28b861a8abf72b37e902121cd2506cea2b7323adba98c5426dcaa71fffc7.dll
Size 5.0MB
Sample260311-wcg9kaft21
SHA256 f1ba28b861a8abf72b37e902121cd2506cea2b7323adba98c5426dcaa71fffc7
MD5 fcc4b38e42170b4c575f0e699ed5d429
SHA1 43d8b0986a481db80ade7b6fee38e2417e31e386
SHA512 684f0d2f3ad83448dc87e540d0e5ef3678d002ba0965bd17d017217a33dfc1af5f5051b89fff7498d298790dcb7add644c153f60932a2dcafc5061a1dc556d30
SSDEEP 49152:SnAQqMSPbc0hx+TSqTdX1HkQo6S8aEau3R8:+DqPo+xcSUDk36SY3R8
TLSH
T12F363366616CE27CD019657150730977EBF27CA5A3FEAA0F8B8487D90D0375ABF90E02
MD5 SHA1 SHA512 SSDEEP TLSH

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 (2693) 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
1880	mssecsvc.exe
3820	mssecsvc.exe
3844	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 4472 wrote to memory of 3776	4472	rundll32.exe	85
PID 3776 wrote to memory of 1880	3776	rundll32.exe	86

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\f1ba28b861a8abf72b37e902121cd2506cea2b7323adba98c5426dcaa71fffc7.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4472
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\f1ba28b861a8abf72b37e902121cd2506cea2b7323adba98c5426dcaa71fffc7.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3776
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:1880
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:3844

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:3820

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 ca685c959e563349fa20a408d95ca4fbaad84f853352e44f47b4d1963c39d09b
MD5 9fd702dfa1bd7068d78248228d26f053
SHA1 87af22cd6445159a046c676bdc1cf29054e6b347
SHA512 77678ce568e16ad57966787331192247244531398996a06b70ee1b9f5581954ee441e60d32d707cf36c7c9a74fe3f28083ae2fe474165cfcc44073ea14b91ff7
SSDEEP 49152:2nAQqMSPbc0hx+TSqTdX1HkQo6S8aEau3R8:yDqPo+xcSUDk36SY3R8
TLSH
T1E6063365616CE27CD019657050730977EBF27CA6A3FEAA0F8B9487D90D0375ABF90E02
MD5 SHA1 SHA512 SSDEEP TLSH

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tasksche.exe

Path C:\Windows\tasksche.exe
Size 3.4MB
SHA256 1d35a546952bdd1b129c2745d5254a46f90ea4e72555d7a0e50f07d3bb68ec40
MD5 f1a0db55060cbf4d048dc0e24299e051
SHA1 41278948915ffe777ebe66dff336cb4a77e1c760
SHA512 aa1227da264b3c35d640c72910e0807402a8dc4388612cd52a53921f35114804f93a39e748db79ae852ae36ea191e06ee2ac6e1d30ff187fb7bdf5b8f979741f
SSDEEP 49152:nQqMSPbc0hx+TSqTdX1HkQo6S8aEau3R8:QqPo+xcSUDk36SY3R8
TLSH
T1D9F533B59170B73CE2296CB5206254A75FD164F1E2EF7F69CAD406D94C08F6EAFC0881
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/1880-6-0x0000000001010000-0x0000000001055000-memory.dmp

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memory/1880-13-0x0000000001010000-0x0000000001055000-memory.dmp

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memory/3776-5-0x0000000000D40000-0x0000000000D59000-memory.dmp

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memory/3776-4-0x0000000000CF0000-0x0000000000D35000-memory.dmp

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memory/3820-9-0x0000000000DD0000-0x0000000000E15000-memory.dmp

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memory/3820-15-0x0000000001E90000-0x0000000001EA9000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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