wannacry | ae0ce95c707b06a3119b12561a152c9d0da4180d0cc63fcab0fc1592a6db95a0

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
27-04-2024 22:18

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General

Target

03c083659265b8d8b5ba2cd0fcf53305_JaffaCakes118.dll
Size

5.0MB
MD5

03c083659265b8d8b5ba2cd0fcf53305
SHA1

82796e2cc166c0afc0b9a7fce3171647b61662dd
SHA256

ae0ce95c707b06a3119b12561a152c9d0da4180d0cc63fcab0fc1592a6db95a0
SHA512

f4471156f83e834e9a3da8112f7aa24def78660519e8a158c646ea091f31740c45c80ff8c8ea2df4b28588e8a100917fba8754e99e50a67a6115652dff6f2eed
SSDEEP

49152:SnAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdhnvxJM0H9PAME:+DqPoBhz1aRxcSUDk36SAEdhvxWa9P5

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (2664) 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

4664 mssecsvc.exe
692 mssecsvc.exe
5016 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
4664	mssecsvc.exe
692	mssecsvc.exe
5016	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 4888 wrote to memory of 2676	4888	rundll32.exe	rundll32.exe
PID 4888 wrote to memory of 2676	4888	rundll32.exe	rundll32.exe
PID 4888 wrote to memory of 2676	4888	rundll32.exe	rundll32.exe
PID 2676 wrote to memory of 4664	2676	rundll32.exe	mssecsvc.exe
PID 2676 wrote to memory of 4664	2676	rundll32.exe	mssecsvc.exe
PID 2676 wrote to memory of 4664	2676	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\03c083659265b8d8b5ba2cd0fcf53305_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4888

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\03c083659265b8d8b5ba2cd0fcf53305_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2676

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:4664

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:5016

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:692

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Windows\mssecsvc.exe
Filesize
3.6MB

MD5
74635b9cc0eaee4a49906a44c82c820d

SHA1
3e5c871df5dc29cffc58e613340e0903a95287e9

SHA256
4ce0a9ad9b1069f76e45d80f2d52b7c87c1973a7079191a6e6750db651e2e2dc

SHA512
5d1414063c31a7016ef2af9d17cec3fa7c9fb6ad28bcc473e951dfbea1ecff3879443fc416d0a7595109eee3f7efdb185f75b4887d06faff4acb2de2dfd1fdd7

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
0d29bde2befdfb72c424f7217f294043

SHA1
35120520cebd59083648aa18d1f3a193ad7365b7

SHA256
ad591135ff110af6cc08f807e725887c29b6d10e28ee7844cafa5133fa488199

SHA512
2f9f8d760acdfa64b566841b38cb7e1240f8e3b70c7a97ff9b63d4176c7fff0ce356eb48384518ed83a9f6fb407239d59ce9bcb0d910f66b9601f613087c4981

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