wannacry | 9b28253bb682bba95e21029b662950e431d89ff35c5ab4c824d8d94f05bf3345

Analysis

max time kernel
150s
max time network
150s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
14-06-2024 17:14

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General

Target

aadbf0d70f1b01b3af63020e0c22ecfb_JaffaCakes118.dll
Size

5.0MB
MD5

aadbf0d70f1b01b3af63020e0c22ecfb
SHA1

1fe092595535e28ade660c16c8a11b5bdebe23eb
SHA256

9b28253bb682bba95e21029b662950e431d89ff35c5ab4c824d8d94f05bf3345
SHA512

d9ca53548a6b04bd4473971b197603888587ef021e7effe391a06310d66a64c93920eea295e6084ecadcb8e83a25c95238f2f6b961d742d174febf36bfdaab1d
SSDEEP

49152:JnjQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdhnvxJM0H+SMbBPWky:d8qPoBhz1aRxcSUDk36SAEdhvxWahF

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3233) 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

2688 mssecsvc.exe
2492 mssecsvc.exe
2552 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
2688	mssecsvc.exe
2492	mssecsvc.exe
2552	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 2916 wrote to memory of 2432	2916	rundll32.exe	rundll32.exe
PID 2916 wrote to memory of 2432	2916	rundll32.exe	rundll32.exe
PID 2916 wrote to memory of 2432	2916	rundll32.exe	rundll32.exe
PID 2916 wrote to memory of 2432	2916	rundll32.exe	rundll32.exe
PID 2916 wrote to memory of 2432	2916	rundll32.exe	rundll32.exe
PID 2916 wrote to memory of 2432	2916	rundll32.exe	rundll32.exe
PID 2916 wrote to memory of 2432	2916	rundll32.exe	rundll32.exe
PID 2432 wrote to memory of 2688	2432	rundll32.exe	mssecsvc.exe
PID 2432 wrote to memory of 2688	2432	rundll32.exe	mssecsvc.exe
PID 2432 wrote to memory of 2688	2432	rundll32.exe	mssecsvc.exe
PID 2432 wrote to memory of 2688	2432	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\aadbf0d70f1b01b3af63020e0c22ecfb_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2916

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\aadbf0d70f1b01b3af63020e0c22ecfb_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2432

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:2688

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2552

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:2492

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
30bc40dfeffebc119ec1e6c01698319b

SHA1
1cdd02930d94f37e1948c5178e1bb3c0ecb73aa8

SHA256
35a76e6fe6a50ee15469b9337efdabb6ae9355341ec22ca7b495073edcea7720

SHA512
93b9c10896e29f805f481f96dc56370bb27d24c77e310d5ad557f5ea5258545a9dd1c5399ad71a3dac2dd4aa5c940e3611400d1e3d2922cb49fa4901a6250062

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
a0b8edde5cc9687d21ce3cbff7ba5288

SHA1
70ab45e14efa6616bdfc45970268ae00f7640cad

SHA256
5c9e87da1c86135ec54c8ede1e05b6ed60ad6ade2bf91301be564c909a20018c

SHA512
4da5353cc19a65fe9da0f2ae2d95d94d19cb51bcfae21d2218ff856b9aec1239198fe73e0e1683e0f8cd25cfb9f0021c9e7e6167456ac6301747eae0f0bf12e2

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