wannacry | 2da27cb1ddfd315a6497300d881d04b280f0bb6ee41a722aef22408df9f82c38

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20220718-en
resource tags

arch:x64arch:x86image:win10v2004-20220718-enlocale:en-usos:windows10-2004-x64system
submitted
20-07-2022 01:54

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General

Target

9bc1f89ad6c328ff37f3444407207067.dll
Size

5.0MB
MD5

9bc1f89ad6c328ff37f3444407207067
SHA1

23b76791f633bc7f39fc7457f52e61bb8de8fea7
SHA256

2da27cb1ddfd315a6497300d881d04b280f0bb6ee41a722aef22408df9f82c38
SHA512

b824fe4365d588a319d7abbb80640c73ac15d83ba80044026a9c96c85f7a9d93a4ad3eaec4a1e34cb93773ec90cd83de401621bf160d26ec41e637d00532b8a0

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3214) amount of remote hosts 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Scanning
T1046
Executes dropped EXE 3 IoCs

Processes:

mssecsvc.exemssecsvc.exetasksche.exe

pid process

4660 mssecsvc.exe
2196 mssecsvc.exe
2720 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 Scanning
T1046
Drops file in Windows directory 2 IoCs

Processes:

rundll32.exemssecsvc.exe

description ioc process

File created C:\WINDOWS\mssecsvc.exe rundll32.exe
File created C:\WINDOWS\tasksche.exe mssecsvc.exe

pid	process
4660	mssecsvc.exe
2196	mssecsvc.exe
2720	tasksche.exe

description	ioc	process
File created	C:\WINDOWS\mssecsvc.exe	rundll32.exe
File created	C:\WINDOWS\tasksche.exe	mssecsvc.exe

Modifies data under HKEY_USERS 5 IoCs

Processes:

mssecsvc.exe

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

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 620 wrote to memory of 2336	620	rundll32.exe	rundll32.exe
PID 620 wrote to memory of 2336	620	rundll32.exe	rundll32.exe
PID 620 wrote to memory of 2336	620	rundll32.exe	rundll32.exe
PID 2336 wrote to memory of 4660	2336	rundll32.exe	mssecsvc.exe
PID 2336 wrote to memory of 4660	2336	rundll32.exe	mssecsvc.exe
PID 2336 wrote to memory of 4660	2336	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\9bc1f89ad6c328ff37f3444407207067.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:620

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\9bc1f89ad6c328ff37f3444407207067.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2336

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:4660

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2720

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:2196

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Scanning

T1046

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\WINDOWS\mssecsvc.exe

Filesize
3.6MB

MD5
fabbc72c5570be4d9b6e910042ae6e90

SHA1
0be19bbb76a53f4003a1b3f38d67af5f09afa210

SHA256
665a4bfd28bf07f72f3d9b384933d300d4580f6c2adf0d600615a8e453b42490

SHA512
585e31a7bcbb2f663d6f5cdb9402f36a635ee6487c81b92f5c17ba80d11a16fca6fdefdd788bdaa99257ac5e3566942a396c768d01790126a326d00e3ef68702

Download Submit
C:\Windows\mssecsvc.exe

Filesize
3.6MB

MD5
fabbc72c5570be4d9b6e910042ae6e90

SHA1
0be19bbb76a53f4003a1b3f38d67af5f09afa210

SHA256
665a4bfd28bf07f72f3d9b384933d300d4580f6c2adf0d600615a8e453b42490

SHA512
585e31a7bcbb2f663d6f5cdb9402f36a635ee6487c81b92f5c17ba80d11a16fca6fdefdd788bdaa99257ac5e3566942a396c768d01790126a326d00e3ef68702

Download Submit
C:\Windows\mssecsvc.exe

Filesize
3.6MB

MD5
fabbc72c5570be4d9b6e910042ae6e90

SHA1
0be19bbb76a53f4003a1b3f38d67af5f09afa210

SHA256
665a4bfd28bf07f72f3d9b384933d300d4580f6c2adf0d600615a8e453b42490

SHA512
585e31a7bcbb2f663d6f5cdb9402f36a635ee6487c81b92f5c17ba80d11a16fca6fdefdd788bdaa99257ac5e3566942a396c768d01790126a326d00e3ef68702

Download Submit
C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
7b003422c990b49d3b987b185c9c58a4

SHA1
237d9bb8c93e75f27acca0b4841932610c8c7ba0

SHA256
0109795d637bb00f1c4934f68e82d2cd867d9c96bd7412b47c849be286983e99

SHA512
3d60a4a88ab30c837ef529a2889e04a552598e4a4d4fcf4a824343718a5eef190c924fc1a7551ac407ef72487876e4c0210900e2a3f923233318e6b9f606994a

Download Submit
memory/2336-130-0x0000000000000000-mapping.dmp

Download
memory/4660-131-0x0000000000000000-mapping.dmp

Download