wannacry | 44533af9de63dd3fac4a9fbba9b6831496b9121eb3ce221145926c3d6b37310e

Analysis

max time kernel
150s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
23-07-2024 12:00

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General

Target

678323b12f8ae74c7bf406efced5f476_JaffaCakes118.dll
Size

5.0MB
MD5

678323b12f8ae74c7bf406efced5f476
SHA1

f9ec0e2e5a679934e18d78f7924cce8f1f324b01
SHA256

44533af9de63dd3fac4a9fbba9b6831496b9121eb3ce221145926c3d6b37310e
SHA512

f6f84783d9965318ae82547bea16289ff63910f8181ab223dc9d9dab45f55f6431c7ae9a6ee46621ee7e545db2be99d2db201a4e94d414acee1e115c4786a3ec
SSDEEP

98304:+DqPoBG1aRxcSUDk36SAEdhWxWa9P593R8yAVp2H:+DqPR1Cxcxk3ZAEFadzR8yc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3361) 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

1484 mssecsvc.exe
1384 mssecsvc.exe
2836 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

Processes:

mssecsvc.exerundll32.exe

description ioc process

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

pid	process
1484	mssecsvc.exe
1384	mssecsvc.exe
2836	tasksche.exe

description	ioc	process
File created	C:\WINDOWS\tasksche.exe	mssecsvc.exe
File created	C:\WINDOWS\mssecsvc.exe	rundll32.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 908 wrote to memory of 4848	908	rundll32.exe	rundll32.exe
PID 908 wrote to memory of 4848	908	rundll32.exe	rundll32.exe
PID 908 wrote to memory of 4848	908	rundll32.exe	rundll32.exe
PID 4848 wrote to memory of 1484	4848	rundll32.exe	mssecsvc.exe
PID 4848 wrote to memory of 1484	4848	rundll32.exe	mssecsvc.exe
PID 4848 wrote to memory of 1484	4848	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\678323b12f8ae74c7bf406efced5f476_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:908

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\678323b12f8ae74c7bf406efced5f476_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:4848

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:1484

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2836

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:1384

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
13ef6033987c39be76b70837347cec3b

SHA1
63287b86bcd9486b67beae844742bae5ae17399e

SHA256
cf810ce50adb1fa79ad76b2bc0d572d11e5896c2b8ca430d286b06d0e7ca379d

SHA512
8cc06baca364ae9e2923938440ab3ffaa3c968b4fd56f9ef000a3177fdf31adbba30f23b9e28bd149181b47ef4c310ac3c49623ac023bb9d479d05905f2abf18

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
c3c3cf66c0bf945b6033c6a94f78b2c9

SHA1
c8371fd0b5a9107eda3cdadd08673c17e02e3ea9

SHA256
4276baeb09c9eeecc34530311b806442cba2a9c7d7f2ad2aca3aba1fe8435465

SHA512
5082353dbb52bfad84fb20211b0ca209a6f6bae95d76919378d699049bf9f593188ad0c82fc790725a6b85aa007b158ca9ae4f4b307e34ac7182bed8a14424d9

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