wannacry | 824eb4ff3cf95ff179fff5e2f0f1cf01db9a4c70e0106177f40492310aa8d1f5

Resubmissions

28-05-2024 20:22

240528-y5vrgaag9x 7

28-05-2024 20:21

240528-y5eegsag7y 7

28-05-2024 20:15

240528-y13arabg59 10

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
28-05-2024 20:15

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General

Target

7e42b85a3c28e4d3fd1928efbb1b1716_JaffaCakes118.dll
Size

5.0MB
MD5

7e42b85a3c28e4d3fd1928efbb1b1716
SHA1

5b9550a8987cf92b4cef087122199c716b39a7d5
SHA256

824eb4ff3cf95ff179fff5e2f0f1cf01db9a4c70e0106177f40492310aa8d1f5
SHA512

2dbbb1b1d48a9c3133a9a97394820ddf5a96a0dc7b75de6d70cc19e544a5add1b295c7b4eaae13fbe9dba848ef4b977c37d3a93e92084866fdbbe7bc5d000912
SSDEEP

98304:+DqPoBhzLk36SAEdhvxWa9P593R8yAVp2H:+DqPeLk3ZAEUadzR8yc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3179) 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

868 mssecsvc.exe
4476 mssecsvc.exe
4924 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
868	mssecsvc.exe
4476	mssecsvc.exe
4924	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\ProxyBypass = "1"	mssecsvc.exe
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

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1360 wrote to memory of 232	1360	rundll32.exe	rundll32.exe
PID 1360 wrote to memory of 232	1360	rundll32.exe	rundll32.exe
PID 1360 wrote to memory of 232	1360	rundll32.exe	rundll32.exe
PID 232 wrote to memory of 868	232	rundll32.exe	mssecsvc.exe
PID 232 wrote to memory of 868	232	rundll32.exe	mssecsvc.exe
PID 232 wrote to memory of 868	232	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\7e42b85a3c28e4d3fd1928efbb1b1716_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1360

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\7e42b85a3c28e4d3fd1928efbb1b1716_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:232

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:868

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:4924

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:4476

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
b8fb46d2a1f577db36856c3277f76976

SHA1
88cccd52b450ce1e4abdd01674aa9c075c80d561

SHA256
25010e5504c35ed06b313a98f1726352fec33d7c4e6908214867b28e149edb09

SHA512
36e958c71ae9f42227f7f30268e87dccb7f3533e4871bc08899b5310effe0d12db4277940e090e60f0818405a2cde879d32920125b51b7edbbf949f48f84799c

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
83f5fbd4c245bf1df5a102a08eafaab3

SHA1
48fea8659fba1b02feb2d4261eb5aef88d13b4a5

SHA256
b1b14b619d2757ead3c0490c776dfadb59fbda8b6a379e24c29ea0826d04978e

SHA512
78cfe4a08f937be15490478e78c4cf8978b5f2847aa2f31a66ad47704afea06c968fe135c505d07021196e2e08abfd82789a0e0b991dbda06528ab1051afbb2c

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