wannacry | 4a1a054fe9408c2d6d97cfd73c2bf6ccf818e0b96bc89be611d4a21dbc91ea36

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
26-05-2024 22:13

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General

Target

76f532e5fe2f8f13db6ddb8a6d67b65a_JaffaCakes118.dll
Size

5.0MB
MD5

76f532e5fe2f8f13db6ddb8a6d67b65a
SHA1

c1365d56fdecf63b1d8bbaf998dbeaa27522626a
SHA256

4a1a054fe9408c2d6d97cfd73c2bf6ccf818e0b96bc89be611d4a21dbc91ea36
SHA512

63a0fe3fe82faf2cf963c84b4fcfa75ce8aba336297371885553f8937f70556d8127381de5418a9518752edc5ea7b309253549a404a7fe42d7f2515c363b78ee
SSDEEP

49152:SnAQqMSPbcBVQej/1IujZuinJ9HUAJ0rMx/J0AMEcaEau3R8yAH1plAH:+DqPoBhz1NiACMhm593R8yAVp2H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3300) 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

5056 mssecsvc.exe
1116 mssecsvc.exe
3944 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
5056	mssecsvc.exe
1116	mssecsvc.exe
3944	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 1704 wrote to memory of 4776	1704	rundll32.exe	rundll32.exe
PID 1704 wrote to memory of 4776	1704	rundll32.exe	rundll32.exe
PID 1704 wrote to memory of 4776	1704	rundll32.exe	rundll32.exe
PID 4776 wrote to memory of 5056	4776	rundll32.exe	mssecsvc.exe
PID 4776 wrote to memory of 5056	4776	rundll32.exe	mssecsvc.exe
PID 4776 wrote to memory of 5056	4776	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\76f532e5fe2f8f13db6ddb8a6d67b65a_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1704

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\76f532e5fe2f8f13db6ddb8a6d67b65a_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:4776

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:5056

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:3944

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:1116

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Windows\mssecsvc.exe
Filesize
3.6MB

MD5
514c2b5968f5477c3346c4faefb0d90e

SHA1
3dd8512b31e08de1a57b4eeb09e7e019e240644e

SHA256
42039e4900a8544e0c2c53a6dad0230c1cd08869d4a1826eff89c91a19885f53

SHA512
568ca8a69f93f6e096fb67887ba97d539d734eeefb3f1ecd05a31a4fa07a7a39f414e7307ba5d5f5300bf7182ea232897471a6ab78ccf5d86169222a5afba430

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
1492eb9292ba77bf9954940cd3093cee

SHA1
e04b0399272b626c23b400b770f68d59b2e419c2

SHA256
c745c5d8d5fde49e36f6129195cc88d489f24ce350ad4cf0c7c9b57fba7f8157

SHA512
f3e3c6f7042da5312ae6d3b1fb769195c32f6bb432c1660b70a19cad672155a71a629e987115b503e6b906fe8b680f6e5bca1711327b8869ffaca01ac5ba8ce8

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