wannacry | 63aac53096ad0110be6b85a9bfb3b3664e2201bdbfddb292edc90aa5142fd46b

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
16-06-2024 09:34

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General

Target

b2ced5d50fb73c8573a4fc980640a3b2_JaffaCakes118.dll
Size

5.0MB
MD5

b2ced5d50fb73c8573a4fc980640a3b2
SHA1

e50a7c2b8ca0d2b05d740135798ef5e21ee6e9e0
SHA256

63aac53096ad0110be6b85a9bfb3b3664e2201bdbfddb292edc90aa5142fd46b
SHA512

b043d4a7336329a811300794a57260d1783490a03e65ee490ca7df6f808df7c7bf4fa107a3d1d7fd0339815e32da352331b91047eafef3b9f09aedd708b80877
SSDEEP

98304:+DqPoBhz1aRxcSUDk36SAaU+f593R8yAVp2H:+DqPe1Cxcxk3ZAaUkzR8yc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (2685) 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

Processes:

mssecsvc.exemssecsvc.exetasksche.exe

pid process

4548 mssecsvc.exe
2948 mssecsvc.exe
3896 tasksche.exe
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
4548	mssecsvc.exe
2948	mssecsvc.exe
3896	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
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 6 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1748 wrote to memory of 1452	1748	rundll32.exe	rundll32.exe
PID 1748 wrote to memory of 1452	1748	rundll32.exe	rundll32.exe
PID 1748 wrote to memory of 1452	1748	rundll32.exe	rundll32.exe
PID 1452 wrote to memory of 4548	1452	rundll32.exe	mssecsvc.exe
PID 1452 wrote to memory of 4548	1452	rundll32.exe	mssecsvc.exe
PID 1452 wrote to memory of 4548	1452	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\b2ced5d50fb73c8573a4fc980640a3b2_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1748

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\b2ced5d50fb73c8573a4fc980640a3b2_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1452

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:4548

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:3896

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:2948

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\mssecsvc.exe

Filesize
3.6MB

MD5
627a57a26cc16112a032043d131ea1f2

SHA1
9642819b121826929700e480518aea237c6168dd

SHA256
8d4ad50d245d6da99d5aece8816fea46b570422d468ffd21fe1ba9074b4bad00

SHA512
2cc96ec085cac79e56c3033f744e2c34c276938b46a497a6c00cb18affa68ad7f90bfe1eca559f224a64a33963fb6f51fb5dc54d833a63a0a66de817f76cfa79

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
8baeda22710ff4b834b3c2bf3d97bc9e

SHA1
c2d666ba1a0a6dbc66330d754fff4a6478f5a5b5

SHA256
c3245e85f9d7969ae8cf3265429cb04cef3be9327e7d9fcb7018281ff1742618

SHA512
b61ae9370f9c35ef94531e8672003260429537c1f9df6e6d3c4a77158aeafb583f80aec0aab9f903d08c94bbda00ba0a16cc3a0ee02c8ddd4ed1266141424a6f

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