wannacry | 05b516f148b27d305ea56071e3f468769cde81fff1ba70961b464cd5823a5d3e

Analysis

max time kernel
150s
max time network
150s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
23-05-2024 07:53

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General

Target

6a41440d8497605a379b20f36a9ae796_JaffaCakes118.dll
Size

5.0MB
MD5

6a41440d8497605a379b20f36a9ae796
SHA1

fc0ff118a6e5c27c077aeb70eb6469ac4e7a8f2b
SHA256

05b516f148b27d305ea56071e3f468769cde81fff1ba70961b464cd5823a5d3e
SHA512

10b4b81379e79139a7bfde342109c4139327352c56128b110b8eb90c67891c62a01261925a42925b4d2e0fcb568897a7154c31132eca9f976fa1773ada155346
SSDEEP

98304:d8qPoBhz1aRxcSUDk36SAEdhvxWa9P5+:d8qPe1Cxcxk3ZAEUadI

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3335) 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

2344 mssecsvc.exe
2192 mssecsvc.exe
2604 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

pid	process
2344	mssecsvc.exe
2192	mssecsvc.exe
2604	tasksche.exe

Drops file in System32 directory 1 IoCs

Processes:

mssecsvc.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\Temporary Internet Files\counters.dat	mssecsvc.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
Modifies data under HKEY_USERS 1 IoCs

Processes:

mssecsvc.exe

description ioc process

Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings mssecsvc.exe

description	ioc	process
File created	C:\WINDOWS\mssecsvc.exe	rundll32.exe
File created	C:\WINDOWS\tasksche.exe	mssecsvc.exe

description	ioc	process
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvc.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1720 wrote to memory of 1704	1720	rundll32.exe	rundll32.exe
PID 1720 wrote to memory of 1704	1720	rundll32.exe	rundll32.exe
PID 1720 wrote to memory of 1704	1720	rundll32.exe	rundll32.exe
PID 1720 wrote to memory of 1704	1720	rundll32.exe	rundll32.exe
PID 1720 wrote to memory of 1704	1720	rundll32.exe	rundll32.exe
PID 1720 wrote to memory of 1704	1720	rundll32.exe	rundll32.exe
PID 1720 wrote to memory of 1704	1720	rundll32.exe	rundll32.exe
PID 1704 wrote to memory of 2344	1704	rundll32.exe	mssecsvc.exe
PID 1704 wrote to memory of 2344	1704	rundll32.exe	mssecsvc.exe
PID 1704 wrote to memory of 2344	1704	rundll32.exe	mssecsvc.exe
PID 1704 wrote to memory of 2344	1704	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\6a41440d8497605a379b20f36a9ae796_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1720

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\6a41440d8497605a379b20f36a9ae796_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1704

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:2344

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2604

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Drops file in System32 directory
- Modifies data under HKEY_USERS
PID:2192

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
6c2e24aa16359e51b83f4d6722b0c2e2

SHA1
47db1cbb8e72a356196b2af529ba0db855a06dd8

SHA256
2d9eca00fa581dcd844200a53fc78110e53c9aa57e638ace20cc8d7f41388f83

SHA512
4dbf020236a18462da7b70c44a6db7fdba40e032611accfba8d875c32244791dc57a978b3e7ebac8c32d3dd5a7f897f2e4fe0efb0bf2447722cbcb3ce37b9338

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
2786d31804c1dddae21102a23c6ca315

SHA1
68a86429e5a7c2e1efca80965ad6bc60e730c52b

SHA256
c94f2d6d9396b5b76c54078d5c7a6d22cf86ee6f3371e3cd4645788477e5d1b3

SHA512
baf0a7aa9b6895b79757d369d77506e3abaeec13a800b3ca6abf9ad527a463be9f7cefcd3ae3fc32b93fb2cad205ba6fc8f82cce9d7454d3a4a38fb6cb351586

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