wannacry | 287d1a9d07d61252fafc01a21aca6dc59f610e21dc4c87d54a6ec93b9b37fbeb

Analysis

max time kernel
150s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
15-06-2024 19:08

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General

Target

afec3cf286a0196baefc26749e251633_JaffaCakes118.dll
Size

5.0MB
MD5

afec3cf286a0196baefc26749e251633
SHA1

857996bcb6caa1f144cf55e4a6301a4d03ec6c2e
SHA256

287d1a9d07d61252fafc01a21aca6dc59f610e21dc4c87d54a6ec93b9b37fbeb
SHA512

a5103e4c114524f5b1bdcc6e08e60354e1a923ce0aee7d150b4407b258746861cc9c22de0a912ba0cb9897a86476f0e9528c8645f08bdac242724966c7e7c63b
SSDEEP

98304:TDqPoBhz1aRxcSUDk36SAEdhvxWa9k593R8yAVp2H:TDqPe1Cxcxk3ZAEUaGzR8yc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (2671) 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

3588 mssecsvc.exe
3168 mssecsvc.exe
2480 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
3588	mssecsvc.exe
3168	mssecsvc.exe
2480	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\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
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	mssecsvc.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 528 wrote to memory of 4796	528	rundll32.exe	rundll32.exe
PID 528 wrote to memory of 4796	528	rundll32.exe	rundll32.exe
PID 528 wrote to memory of 4796	528	rundll32.exe	rundll32.exe
PID 4796 wrote to memory of 3588	4796	rundll32.exe	mssecsvc.exe
PID 4796 wrote to memory of 3588	4796	rundll32.exe	mssecsvc.exe
PID 4796 wrote to memory of 3588	4796	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\afec3cf286a0196baefc26749e251633_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:528

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\afec3cf286a0196baefc26749e251633_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:4796

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:3588

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2480

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:3168

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
4fa562dbc3a05f6bdbe56b67cc7ac49b

SHA1
e90443d3c9c7bb8585253e71317114f83657d8b2

SHA256
92cc0c41fab577f0a440435e8a8af963af0ee305580df02bf1294bf7750adbff

SHA512
39c834a917e36a144bf6ff494605342dcb1d46e710057e7b055563353025add9d40a7c4e880a55f2cd7ccebf037c06b3738d19b449f37b604a84876d4cd6db59

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
bc2a13d72a2ceaa472ea9a09c1f71aba

SHA1
81b6bad5ee461426af7d83f221c9f0d513ba8042

SHA256
430ac01177e466e8e0a89b38aaff56ec311a596a39be0553d051a1b9246c90d6

SHA512
0e7a8f09c606b72f6b042cddaa9def46b54998782137d407273fb7654ecf2ac78dd2aeb4558fefe3ea50a7343b05b5dbed345b75c10c52d9d524fbe89a135cb8

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