wannacry | 1e334556232ab5d7ef5f416d8655ee93805243a1131ba98304bccb1aa75de48c

Analysis

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

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
05-05-2024 07:38

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General

Target

16a59054401b9207346e5ddaf2251025_JaffaCakes118.dll
Size

5.0MB
MD5

16a59054401b9207346e5ddaf2251025
SHA1

a51966f841d905378fed62b9fcf24740d17d78e0
SHA256

1e334556232ab5d7ef5f416d8655ee93805243a1131ba98304bccb1aa75de48c
SHA512

c38b80516b76b3dd02ad902ad92271c2de5a73164d61c5390e1f3be5b625cf7c8b4cce4a7b39f4ebb16dfd61e6185e17ff1d6a7ce48eba859b6e883f993f757e
SSDEEP

24576:zbLgddQhfdmMSirYbcMNge6hWRgImGt/8CatZ5PsDADorxoIl+2:znAQqMSPbcBZQyvGSIkI

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3372) 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

4424 mssecsvc.exe
3732 mssecsvc.exe
1284 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
4424	mssecsvc.exe
3732	mssecsvc.exe
1284	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 1440 wrote to memory of 1604	1440	rundll32.exe	rundll32.exe
PID 1440 wrote to memory of 1604	1440	rundll32.exe	rundll32.exe
PID 1440 wrote to memory of 1604	1440	rundll32.exe	rundll32.exe
PID 1604 wrote to memory of 4424	1604	rundll32.exe	mssecsvc.exe
PID 1604 wrote to memory of 4424	1604	rundll32.exe	mssecsvc.exe
PID 1604 wrote to memory of 4424	1604	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\16a59054401b9207346e5ddaf2251025_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1440

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\16a59054401b9207346e5ddaf2251025_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1604

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:4424

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:1284

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:3732

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
41bce42dd9ad95794965ca2e7588116e

SHA1
319a77834e7ee73a787ce6ec24a12faf8a584a4a

SHA256
747cf92ea523b0fbaa5c50cbf37900c75a7924377589aaffe742d614b70a7b19

SHA512
f4f2001300025325062be4f10547ad05d6f219a8ac4cdd1feea2ab40d644fbad5f07b39e8d9cde5ff430e3b17cf66f235cac6d0735304797062fb6849c947158

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
f2ed6cd57c5f67d47a0f40ec817b2619

SHA1
9d6741b61946e4defb05ab6b3affa6113144f40b

SHA256
c2dbb1a25455be8de0f7a99d8212b325697ff643f8f0409c1db660dece0d2a80

SHA512
0ac0f0b9d27e61e97e7d5a7dd70a8c26d49e767f40fb751e35717dce9436df56f8df001d0b19263a24cbfea71b872bd6352fd792a4bf85d8db714f404b569219

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