wannacry | 0425190cd56bfb638636057a1714fb3315da5046822e73ff4b1bfced0d92c229

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
12-05-2024 04:49

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General

Target

3856ef42d7ce6f8d6846d7dcdea1cc49_JaffaCakes118.dll
Size

5.0MB
MD5

3856ef42d7ce6f8d6846d7dcdea1cc49
SHA1

4c8b980864fba332a123ebfd54c162792fe5bfc7
SHA256

0425190cd56bfb638636057a1714fb3315da5046822e73ff4b1bfced0d92c229
SHA512

c0b1bc0441753a355b5d406aa45957c08b8934cc31c7020495b5e76427f8c7dc9cfba1ddbf5995cdacd85be44384e1f5bce297bd89caa3e8b59543f7bb016176
SSDEEP

98304:+DqPoBhz1aRxcSUDk36SAEdhvxWa9P5ZyAVp2H:+DqPe1Cxcxk3ZAEUad7yc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3199) 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

5020 mssecsvc.exe
316 mssecsvc.exe
3636 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:

rundll32.exemssecsvc.exe

description ioc process

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

pid	process
5020	mssecsvc.exe
316	mssecsvc.exe
3636	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 1244 wrote to memory of 4252	1244	rundll32.exe	rundll32.exe
PID 1244 wrote to memory of 4252	1244	rundll32.exe	rundll32.exe
PID 1244 wrote to memory of 4252	1244	rundll32.exe	rundll32.exe
PID 4252 wrote to memory of 5020	4252	rundll32.exe	mssecsvc.exe
PID 4252 wrote to memory of 5020	4252	rundll32.exe	mssecsvc.exe
PID 4252 wrote to memory of 5020	4252	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\3856ef42d7ce6f8d6846d7dcdea1cc49_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1244

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\3856ef42d7ce6f8d6846d7dcdea1cc49_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:4252

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:5020

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:3636

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:316

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

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Downloads

C:\Windows\mssecsvc.exe
Filesize
3.6MB

MD5
23022312fd0eb362acd51a62e69185d4

SHA1
deb9d113e39e66301635ca6f72f7bfc258dfea6a

SHA256
90713884f770c6608d27ed23c9a5dc983a3351b46ae5b76e9480cfa7c6331c0c

SHA512
face22acf5004cc0c50699394f623e9dde94d0df34efe30f4a5874e2269131d12cbe1f5551bd0708176df8c164b02bc90e5f8d20cd4790cd746d26b3b2baed2b

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
f2a03186491eb9a7b49b33fea7504a29

SHA1
4a4996abe06cee5fdb6442092db06c7c191af893

SHA256
48832f220035f46a949838de7e782963a57d8d4ac8f094847f7eb2efdfbe7a3e

SHA512
c1bd8c6c08324fd9b01c13bb733cc00845832acb0f60c86381ad368ddf817cde5fbca8195b45bd1fdd7062ebb3c4de7e054910542b27a3973f7af16318d56d09

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