wannacry | 554f9a45ff13004de1e16fab4be1e467374f940a963cc9ce65d2906f0c54857a

Resubmissions

18-05-2024 08:15

240518-j5t3lsbc4v 10

18-05-2024 07:00

240518-hstqmsgg9w 10

18-05-2024 06:28

240518-g8smvafg7y 10

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
18-05-2024 06:28

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General

Target

53606881d4f8b4934c5ade1947e88bc9_JaffaCakes118.dll
Size

5.0MB
MD5

53606881d4f8b4934c5ade1947e88bc9
SHA1

5588e92d9be1ced63f3f9c6514a1a4a0ed90995e
SHA256

554f9a45ff13004de1e16fab4be1e467374f940a963cc9ce65d2906f0c54857a
SHA512

d431c39be859d8ce73c2e12a5cbf6d538540fdb9811b85cc65fde9bb2e3336ab3af5e80f6cf77c10a768e3f45cc8b699980f9a04bb909c3238be5d0ad853948e
SSDEEP

98304:+DqPoBhz1aRxcSUDk36SAEdhvxWa9yLGp2H:+DqPe1Cxcxk3ZAEUaYS4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3245) 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

64 mssecsvc.exe
4224 mssecsvc.exe
3000 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
64	mssecsvc.exe
4224	mssecsvc.exe
3000	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 1592 wrote to memory of 1040	1592	rundll32.exe	rundll32.exe
PID 1592 wrote to memory of 1040	1592	rundll32.exe	rundll32.exe
PID 1592 wrote to memory of 1040	1592	rundll32.exe	rundll32.exe
PID 1040 wrote to memory of 64	1040	rundll32.exe	mssecsvc.exe
PID 1040 wrote to memory of 64	1040	rundll32.exe	mssecsvc.exe
PID 1040 wrote to memory of 64	1040	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\53606881d4f8b4934c5ade1947e88bc9_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1592

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\53606881d4f8b4934c5ade1947e88bc9_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1040

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:64

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:3000

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:4224

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
73d70a80e0c6e1e48ea11b3d8a8a1751

SHA1
324859b5d9375d54f04f71ca57f6b40da225698b

SHA256
6c625b9cc9f1b30cfd2353788bb6c602f06f5367335e7ca08ddbd3a8a9367cd8

SHA512
74836df0c9c76fdafe7bd88064d36d3755db1362e20e54f905597a7886ac6d552659aadf2bb5358913ce08e5d983f46b32f442169f00746f2d29160f59e667f1

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
c78dc18cb700bf44bda65f0c034d5ba0

SHA1
f31459a361538232d6bb782242288cb731641acf

SHA256
7e5dfaf660b26409f5359a6ca7b7ffe682c6d9c9b5a74fa889974291e933ae0b

SHA512
e1e5c95bc66c13949b871c06bf40cc82793b9a4dd570212f336101742c7994aa5cc559e33fea1425a395207d0d82df6bc155db773a178c5b3afb94df54ad79d4

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