wannacry | 714c815f33366588ba72840466b43260e527831a44938a4d713f7e82d5c3acab

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
10-05-2024 10:38

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General

Target

2eb5330b446d2fa44fe682b1690ff89d_JaffaCakes118.dll
Size

5.0MB
MD5

2eb5330b446d2fa44fe682b1690ff89d
SHA1

e3a0b6ce278dc8ae94846ab6aab8e1b4d96a4b51
SHA256

714c815f33366588ba72840466b43260e527831a44938a4d713f7e82d5c3acab
SHA512

c74db9c8677e1d7358038d23ccf1b292390c6d52a32123d4f362d3fe8ba843e24740da7e96e3f65b9fbdcbc4d857e846ec76927b9dd2a9c2ca855fd49bdfa33b
SSDEEP

98304:+DqPoBhz1aRxcSUDk36SAEdhvxWa9P593R8yAVp2o:+DqPe1Cxcxk3ZAEUadzR8yc4

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3363) 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

3500 mssecsvc.exe
2924 mssecsvc.exe
1148 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:

mssecsvc.exerundll32.exe

description ioc process

File created C:\WINDOWS\tasksche.exe mssecsvc.exe
File created C:\WINDOWS\mssecsvc.exe rundll32.exe

pid	process
3500	mssecsvc.exe
2924	mssecsvc.exe
1148	tasksche.exe

description	ioc	process
File created	C:\WINDOWS\tasksche.exe	mssecsvc.exe
File created	C:\WINDOWS\mssecsvc.exe	rundll32.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\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
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	mssecsvc.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1180 wrote to memory of 4496	1180	rundll32.exe	rundll32.exe
PID 1180 wrote to memory of 4496	1180	rundll32.exe	rundll32.exe
PID 1180 wrote to memory of 4496	1180	rundll32.exe	rundll32.exe
PID 4496 wrote to memory of 3500	4496	rundll32.exe	mssecsvc.exe
PID 4496 wrote to memory of 3500	4496	rundll32.exe	mssecsvc.exe
PID 4496 wrote to memory of 3500	4496	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\2eb5330b446d2fa44fe682b1690ff89d_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1180

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\2eb5330b446d2fa44fe682b1690ff89d_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:4496

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:3500

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:1148

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:2924

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
c75323fc0e89cf733ab182dadc67c60e

SHA1
76717353e5c5f212cc2acc77f7e164cce596d755

SHA256
780cd956f2220631086a17cbd6e838ae096831f53dc71e674ad983fa1088b2fd

SHA512
f9848559ab6d490ee640240e2001cb3dd04f39dccfd1ad743fc9c5a9824b958a77add7569d2fa656e2e9ae7709c0c862332463bc6d4b1ded88563fc34390179d

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
3b39c6d45c538f2d36204e81914325f7

SHA1
c89e14ff9d5737fdb2e048604a74be8fbe8407c4

SHA256
cd475edc3a7e64227fea88e61767245acbceffe77f8c3e09bd49927cbda29210

SHA512
c7992514b3b0ce6c683c83ecf0c5ae0acbf7895a5e537631da75e6cc75e898b78e93b465f60be3a87e20edb2acc1e8dff9df4930fd13a41e873151efea2fdfce

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