wannacry | 985dcbeb48e5edc2045350bf29dc7f58ea21289a43a3aac5325ec6e937a9baab

Analysis

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

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
22-05-2024 09:35

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General

Target

66d0167dff2512c96e488373c9303581_JaffaCakes118.dll
Size

5.0MB
MD5

66d0167dff2512c96e488373c9303581
SHA1

84e3e17eb781d27d4f7300ce2b655a582466095c
SHA256

985dcbeb48e5edc2045350bf29dc7f58ea21289a43a3aac5325ec6e937a9baab
SHA512

b4d0995353ad63f9e9a504a9517cb53175aae9034cd94ae35a8ea1dbb3b7d62a15ec8ea779ca2e4d480d143fbe92af5621dd0e22fcb88c66fc6f533f3b4592ca
SSDEEP

49152:znAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAAF:TDqPoBhz1aRxcSUDk36SAQ

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3228) 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

3708 mssecsvc.exe
3228 mssecsvc.exe
4380 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
3708	mssecsvc.exe
3228	mssecsvc.exe
4380	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 32 wrote to memory of 2156	32	rundll32.exe	rundll32.exe
PID 32 wrote to memory of 2156	32	rundll32.exe	rundll32.exe
PID 32 wrote to memory of 2156	32	rundll32.exe	rundll32.exe
PID 2156 wrote to memory of 3708	2156	rundll32.exe	mssecsvc.exe
PID 2156 wrote to memory of 3708	2156	rundll32.exe	mssecsvc.exe
PID 2156 wrote to memory of 3708	2156	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\66d0167dff2512c96e488373c9303581_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:32

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\66d0167dff2512c96e488373c9303581_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2156

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:3708

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:4380

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:3228

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
48637e9649afe06bc844e29ab5866331

SHA1
551edf88324651f8b4a48b895fbfeb2cb2cbb99a

SHA256
05af869be1280c1bf69fb55724abe22176aedbf21c7eb35bbe175b8c44e5b2a7

SHA512
1a67fe25bee3f41e4d1f6071cc2ada77e3d9a792a7ccc6e1ec3794a28e6e86a48b720208ec892e73b9f224057b900c4148ec35289129254b53b27ad258063c38

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
fa6751bcac3563b1aa9a2379ebf5eb22

SHA1
60095fa548b52ffd7fd20b860101b0221099507f

SHA256
5ad7aaa402afedcd1eeb2c3ef8d327392b2ab488730abae12bf0d6274c9bca45

SHA512
21c55dbfdb2c80fc47600b45acca90c3ea9a8130cd32f93b2fa74abe62492e58c4d075aca1908d43350d44bae173fa2ede42f6aa50baf9badf496887441179e2

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