wannacry | e2f0cfcd8f18e7933fe13b0f70da0baed36bce3bdea742cd5bd37466459d5c62

Analysis

max time kernel
151s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
28-05-2024 02:27

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General

Target

7b60b6267c703ab645461102a9137529_JaffaCakes118.dll
Size

5.0MB
MD5

7b60b6267c703ab645461102a9137529
SHA1

9476270dbd5204a5a9f77ec6bad96ecbfdc27c33
SHA256

e2f0cfcd8f18e7933fe13b0f70da0baed36bce3bdea742cd5bd37466459d5c62
SHA512

d9d9341640329445f727c51f294ebda7f53e206bd937f9b2b00155abb219e09668c44b5a3ec068e4ea55f8a26990d12e83f7159db9f215cbb2dc97da86b2ff30
SSDEEP

49152:SnAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdh:+DqPoBhz1aRxcSUDk36SAEdh

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (2960) 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

2376 mssecsvc.exe
2820 mssecsvc.exe
3664 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
2376	mssecsvc.exe
2820	mssecsvc.exe
3664	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
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
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

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 3420 wrote to memory of 1600	3420	rundll32.exe	rundll32.exe
PID 3420 wrote to memory of 1600	3420	rundll32.exe	rundll32.exe
PID 3420 wrote to memory of 1600	3420	rundll32.exe	rundll32.exe
PID 1600 wrote to memory of 2376	1600	rundll32.exe	mssecsvc.exe
PID 1600 wrote to memory of 2376	1600	rundll32.exe	mssecsvc.exe
PID 1600 wrote to memory of 2376	1600	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\7b60b6267c703ab645461102a9137529_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3420

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\7b60b6267c703ab645461102a9137529_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1600

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:2376

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:3664

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:2820

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1344 --field-trial-handle=2284,i,15722001240173834669,15048020084704567542,262144 --variations-seed-version /prefetch:8
1⤵
PID:3404

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

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Downloads

C:\Windows\mssecsvc.exe

Filesize
3.6MB

MD5
c4e71f325e2af6a989f235cbc068504d

SHA1
7f22a06ef6ee9e21bf4733cfcce35363e9252e53

SHA256
40d7c2942b40871980b1ecd33c0baf9952f674de62c209ee2f6def5a88e28a85

SHA512
1c5d90f4f74c91af177b00d8a8d2735b047bef056e1eda78f878259ff0bbb8858c29fa8ff0cccf08675948d9a0fb5eba126cbaf6caf9db98fcfecd9fd7aecee1

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
244c98f45f700b449f5d3fcf02ee2368

SHA1
19b00bc6239aaad7b8f29821e943317a2d550889

SHA256
ab08e2599f549a12341c1d7305528e37bb2a8800cb05c8df8d67c36de141e9de

SHA512
43d385e81ff82a6a3cb633519dadc384bc4fccc5f03dd64d6d248053c1e950e9fd236c664b55202b07cb3b0a4399c2b5e01696e345e1ecdd851b10d250b99974

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