wannacry | fc655593cfd12dc5d0a6d1c7b683da3c4981d584182385e36ec18df7dc4bf382

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
29-05-2024 04:51

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General

Target

7f8b1fb9dfd7affb5397d60de882f40f_JaffaCakes118.dll
Size

5.0MB
MD5

7f8b1fb9dfd7affb5397d60de882f40f
SHA1

a244f82a423578890ad2d2457772dbfeed370f02
SHA256

fc655593cfd12dc5d0a6d1c7b683da3c4981d584182385e36ec18df7dc4bf382
SHA512

fc21cb592bc67fb9fa85eeb265158b495ee8c491092055e17a88e80d8c4021c1a8781068b1e993802b6813927d38bcfe568bba3e862c66075dd79e82c248b1dc
SSDEEP

98304:d8qPoBhz1aRxcSUDk36SAEdhvxWaS5P3z+lcCcu0RCvlsPsWvM7/Yp:d8qPe1Cxcxk3ZAEUaGtjk3

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3180) 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

2852 mssecsvc.exe
2772 mssecsvc.exe
2516 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
2852	mssecsvc.exe
2772	mssecsvc.exe
2516	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:

mssecsvc.exerundll32.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 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\tasksche.exe	mssecsvc.exe
File created	C:\WINDOWS\mssecsvc.exe	rundll32.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 2196 wrote to memory of 2792	2196	rundll32.exe	rundll32.exe
PID 2196 wrote to memory of 2792	2196	rundll32.exe	rundll32.exe
PID 2196 wrote to memory of 2792	2196	rundll32.exe	rundll32.exe
PID 2196 wrote to memory of 2792	2196	rundll32.exe	rundll32.exe
PID 2196 wrote to memory of 2792	2196	rundll32.exe	rundll32.exe
PID 2196 wrote to memory of 2792	2196	rundll32.exe	rundll32.exe
PID 2196 wrote to memory of 2792	2196	rundll32.exe	rundll32.exe
PID 2792 wrote to memory of 2852	2792	rundll32.exe	mssecsvc.exe
PID 2792 wrote to memory of 2852	2792	rundll32.exe	mssecsvc.exe
PID 2792 wrote to memory of 2852	2792	rundll32.exe	mssecsvc.exe
PID 2792 wrote to memory of 2852	2792	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\7f8b1fb9dfd7affb5397d60de882f40f_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2196

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\7f8b1fb9dfd7affb5397d60de882f40f_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2792

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:2852

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2516

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:2772

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
cea30218f594702c70e4a6e15d9e9a78

SHA1
6b786193150fcf1352f5d8c1cb6195d953656968

SHA256
2995189834a208f7cd479a449c70781cd7e8c44dd847f191cde69a4d4cca8f9d

SHA512
1df7a3a59193329649659f668c87cb5c08f350139e6b222c719ee2f51c8d0e05d635c0c5acc60feb438ab932cd8e5b0cd7a4cb116f1a11de097c33e732d89446

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
7fa453ce95ec282b01d71493d7616ccc

SHA1
df52398d959e3a503c42c77b5e1c5701fafe6942

SHA256
7ee6d5e894e0e69308dd02f6993c14efc4005c5c31708eaffe4bb1e09634efe2

SHA512
21de6f6a4239da9e5fc654d6d87c2a722a69854d7bf233c0882f5c898aa6ce4e771327c600e2013dcc09c2a327c749a9ed1a759834a80c71b54ebc094818e3fb

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