wannacry | a2764aa6b77f04df6ec82a911405ae75a9315093d1836091c386669f6da2cff5

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
25-05-2024 06:31

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General

Target

7120a143729288157fb3356fc60205bc_JaffaCakes118.dll
Size

5.0MB
MD5

7120a143729288157fb3356fc60205bc
SHA1

45b703b0353d71541c8abd6faea7e57c3adca5fb
SHA256

a2764aa6b77f04df6ec82a911405ae75a9315093d1836091c386669f6da2cff5
SHA512

4e5d49f7e5b3171e9488a660ee67847160144e428a8219311cd437a8df3c0c0fbd4be6a6d48c26b6a9a0d9db2f2fd3c4afc255c41a1a5a617799ae36d1ed6847
SSDEEP

98304:+DqPoBhz1aRxcSUDk36SA8dhvxWa9P5FyAVp2H:+DqP21Cxcxk3ZA8Uadvyc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3140) 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

4028 mssecsvc.exe
3976 mssecsvc.exe
4524 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
4028	mssecsvc.exe
3976	mssecsvc.exe
4524	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
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 1148 wrote to memory of 3688	1148	rundll32.exe	rundll32.exe
PID 1148 wrote to memory of 3688	1148	rundll32.exe	rundll32.exe
PID 1148 wrote to memory of 3688	1148	rundll32.exe	rundll32.exe
PID 3688 wrote to memory of 4028	3688	rundll32.exe	mssecsvc.exe
PID 3688 wrote to memory of 4028	3688	rundll32.exe	mssecsvc.exe
PID 3688 wrote to memory of 4028	3688	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\7120a143729288157fb3356fc60205bc_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1148

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\7120a143729288157fb3356fc60205bc_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:3688

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:4028

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:4524

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:3976

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
e5c307c267fd37464685ffe39b3bc302

SHA1
53980842895697ed2ee76aadcb2d78c4a1293013

SHA256
8be4a0a025dc4c88614260b370a97f4c4327d41d8171f9c0a2f36986cfc8f72c

SHA512
ab93f8c05ecd6737ab2ef687897b040994fe05ffa88b63b2fcbb4c9316ef9eee5539301dd0ce89af222cb3332e7d5768844c0fb5a33d974fc6738407f1952741

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
030bf9acda05b8f3f7a6aa32d40103f0

SHA1
d8d1445d9ef512581af73d7cd0380a44e662e777

SHA256
866086260c803d0386f8629ff49aae269669b7eb55d0e170414023aa5f999300

SHA512
e4568a518a8959f965c88eec7219513e7bd7651f7a5b2cb70888d14f9b62430f110ae041e69848458e86a90cff06aa28d363b4ced5d103d03152aa95fc34c415

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