wannacry | ea87a95d9ae1ec567e5b46c78575d7c2ae149bc1589a9b82a33d77fd53f76c6d

Analysis

max time kernel
150s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
26-05-2024 09:17

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General

Target

7500876dbd437dcf01e8a323eca934a9_JaffaCakes118.dll
Size

5.0MB
MD5

7500876dbd437dcf01e8a323eca934a9
SHA1

7a129034f90ffa4fc0775d2e22c2954e9ca37c38
SHA256

ea87a95d9ae1ec567e5b46c78575d7c2ae149bc1589a9b82a33d77fd53f76c6d
SHA512

e4908bc71ae45367aef83c7ab0d9d3bff4242bc0d75c7dd64746fce83e5eca89af5024013376e3f9026aa56c160b82a1599e2f8e64147d526736b2cdcb8e3b3b
SSDEEP

49152:SnAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAA:+DqPoBhz1aRxcSUDk36SA

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3332) 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

1344 mssecsvc.exe
4580 mssecsvc.exe
2620 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
1344	mssecsvc.exe
4580	mssecsvc.exe
2620	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\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
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

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 4784 wrote to memory of 4932	4784	rundll32.exe	rundll32.exe
PID 4784 wrote to memory of 4932	4784	rundll32.exe	rundll32.exe
PID 4784 wrote to memory of 4932	4784	rundll32.exe	rundll32.exe
PID 4932 wrote to memory of 1344	4932	rundll32.exe	mssecsvc.exe
PID 4932 wrote to memory of 1344	4932	rundll32.exe	mssecsvc.exe
PID 4932 wrote to memory of 1344	4932	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\7500876dbd437dcf01e8a323eca934a9_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4784

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\7500876dbd437dcf01e8a323eca934a9_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:4932

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:1344

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2620

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:4580

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
ce4defcbaf8704a5a1cc3fdfec1630e7

SHA1
b498d9e3bde1604b42f5747d9c96cd3ef89ce1ee

SHA256
41f7857637d7863ef18e074da54c2a1a65b4786abc663efd50f109cd4b21ee3c

SHA512
1dc3b256694d3337efb61b5f9cfa366351d78850647ba6346b3a71863629eabba53a7c7d705a3dd9cf16bf31a3738b565e399eff38fc0b6961ed3f6ace3f44bf

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
9ccf601244b8682f1124ecd3d5290c57

SHA1
ee5bb67b75ddd79f96154f4cb33528eb45e20d4f

SHA256
040560292081d44fce990fc7e89198ae6c6fe959ddc3c47808476689d7f16703

SHA512
ee8742529005574bed41f2e029cbe78fdb8b9e59ef53ad2637b2b35207ee45d34d48f279d4c2aa7c2f9a34748bafb0af45fab19488ecc779d3241432b0a262a5

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