wannacry | bc84ef9aa6a4363396986468c5a50a11dae4a92ca1e00770554c39bc7c7839d5

Analysis

max time kernel
150s
max time network
152s
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

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
bc84ef9aa6a4363396986468c5a50a11dae4a92ca1e00770554c39bc7c7839d5.dll
Size 5.0MB
Sample260106-jc424set9d
SHA256 bc84ef9aa6a4363396986468c5a50a11dae4a92ca1e00770554c39bc7c7839d5
MD5 78c4bdfcf25809ee9b641f652c7ddc5b
SHA1 c2f3b043ef15856938d0faab2799515405bcf775
SHA512 ca05c1c75bdeca8c7bd5970704e7bee251e757d1294bc85ca65f99eb615eabaec0ac75bbc0250deaf466cc6cfd66b1d590cc0119e31f24e295ba165dceddb0e3
SSDEEP 98304:TDqPoBhz1aRxcSUDk36SAEdhhP55Vp2H:TDqPe1Cxcxk3ZAEFV4H
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 (3276) 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
3476	mssecsvc.exe
2700	mssecsvc.exe
4884	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 4256 wrote to memory of 996	4256	rundll32.exe	77
PID 996 wrote to memory of 3476	996	rundll32.exe	78

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\bc84ef9aa6a4363396986468c5a50a11dae4a92ca1e00770554c39bc7c7839d5.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4256
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\bc84ef9aa6a4363396986468c5a50a11dae4a92ca1e00770554c39bc7c7839d5.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:996
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:3476
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:4884

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:2700

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

Loading Replay Monitor...

Downloads

mssecsvc.exe

Path C:\Windows\mssecsvc.exe
Size 3.6MB
SHA256 c1edf916020c3bccd9af73aa8d27cea01747e9ccd1357f52aeb514e442427cd5
MD5 a37eecef84166377546eae5facef1c9f
SHA1 74d527c84c5d91ce4e8bda6ceac307e23028a387
SHA512 fd9e6aea90af71fb8721337b40ba14beec0ad9a58c715de1461a5909771f3600e62df42141f34c65703d77c1b4082b1d4de56131ed09cfabc53705d469531f6d
SSDEEP 98304:XDqPoBhz1aRxcSUDk36SAEdhhP55Vp2HI:XDqPe1Cxcxk3ZAEFV4HI
MD5 SHA1 SHA512 SSDEEP

Submit Download

tasksche.exe

Path C:\Windows\tasksche.exe
Size 3.4MB
SHA256 56aa953e31a7aa71659f4fb9333de189014656810fe12de3b215db6bf2a53939
MD5 0edcb23e1b4a14ea237c945034cc1fa5
SHA1 098c6bf0738c156f110f59a0fbee8807a13e8292
SHA512 2b623def457a31c48daefae21ad7e75a79504a07dc8229b628ed9054e3ebddbf0d8bf98697f6519133bde0723b78fc5c803f0968734cc4fbaae21d7c565cb366
SSDEEP 49152:nQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdhhPAMEcTH1plAHj:QqPoBhz1aRxcSUDk36SAEdhhP55Vp2Hj
MD5 SHA1 SHA512 SSDEEP