wannacry | 9df3a9d985a1ae5fad8ff6996c76b302bd421bbcb7d4cd4136fc8d22e042fd59

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
02-06-2024 16:57

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General

Target

8ec77d93ab553f5ff3d1d684ddd6f24d_JaffaCakes118.dll
Size

5.0MB
MD5

8ec77d93ab553f5ff3d1d684ddd6f24d
SHA1

7f576892ea5f99de6b0b8df23c45f261fe7f4d49
SHA256

9df3a9d985a1ae5fad8ff6996c76b302bd421bbcb7d4cd4136fc8d22e042fd59
SHA512

0715d02c5b69987d1db9c0c9209583c7b77c1784ada0a8c8176096f7ebcaca2c6f39441ab73cabaf25c3fc0130a558728007efb259cb83891ff5bffb46c32573
SSDEEP

98304:+DqPoBhz1aRxcSUDk36SAEdhvxWa9P502H:+DqPe1Cxcxk3ZAEUadJH

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3247) 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

4704 mssecsvc.exe
3576 mssecsvc.exe
5384 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
4704	mssecsvc.exe
3576	mssecsvc.exe
5384	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 4516 wrote to memory of 2616	4516	rundll32.exe	rundll32.exe
PID 4516 wrote to memory of 2616	4516	rundll32.exe	rundll32.exe
PID 4516 wrote to memory of 2616	4516	rundll32.exe	rundll32.exe
PID 2616 wrote to memory of 4704	2616	rundll32.exe	mssecsvc.exe
PID 2616 wrote to memory of 4704	2616	rundll32.exe	mssecsvc.exe
PID 2616 wrote to memory of 4704	2616	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\8ec77d93ab553f5ff3d1d684ddd6f24d_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4516

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\8ec77d93ab553f5ff3d1d684ddd6f24d_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2616

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:4704

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:5384

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:3576

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
f3e2be57426609578e6c94aa8b43cb62

SHA1
33dc527590459c8cce7674150a5e76774ba7ff11

SHA256
84b5e6b371ee8966613d5774140d4c92af41397e2726066368e3fe6a35df3902

SHA512
2187c01b6dd903798a33c453dda0b7e766757f21f236a3d8c1fd931ffa93300cb701de2fc5079182e50a93c49a2bd87d4b7c4acacec0ac30bc0cb5ca8d5673d3

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
ad39f2986e0c7b0a4890db62d6b63d7d

SHA1
d1cf1fef56ee50f127a61c2bdadd2e7275de05d6

SHA256
c0452af036e8498874155aa9c28cfe1d05f14f1aa42fdc1cd4d9c524e8697c76

SHA512
2a3e30556b4c4d3b712f2904e9285a32fa274f52fc712d41b6f798fed1edb86a683cc9e9747d0db5907312f190e14d8ec39e4bd675a96c2cd88d8c64b6bdd45f

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