wannacry | a4c7022dd7d4aa7eb066676179e5bfe818cdf0a6c4da9d5122d9be6156e7fe51

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
12-07-2024 16:48

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General

Target

3e1f1ab7eb22b54d451f764377d869ab_JaffaCakes118.dll
Size

5.0MB
MD5

3e1f1ab7eb22b54d451f764377d869ab
SHA1

0ef805454a7aeb92e5be18457fe430f22186fbc4
SHA256

a4c7022dd7d4aa7eb066676179e5bfe818cdf0a6c4da9d5122d9be6156e7fe51
SHA512

16c237558076cdc622281a76f541ab28ca56d24ccdc63538d104c3acf51db9323d374051f4ba5a637cb39bf1cd8c85374fec6ae6181806e025020f9705735022
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 (3308) 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

4232 mssecsvc.exe
1056 mssecsvc.exe
4400 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
4232	mssecsvc.exe
1056	mssecsvc.exe
4400	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\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
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	mssecsvc.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1144 wrote to memory of 1508	1144	rundll32.exe	rundll32.exe
PID 1144 wrote to memory of 1508	1144	rundll32.exe	rundll32.exe
PID 1144 wrote to memory of 1508	1144	rundll32.exe	rundll32.exe
PID 1508 wrote to memory of 4232	1508	rundll32.exe	mssecsvc.exe
PID 1508 wrote to memory of 4232	1508	rundll32.exe	mssecsvc.exe
PID 1508 wrote to memory of 4232	1508	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\3e1f1ab7eb22b54d451f764377d869ab_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1144

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\3e1f1ab7eb22b54d451f764377d869ab_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1508

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:4232

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:4400

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:1056

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
6023bb9604c82902e33abaad4053a6e2

SHA1
486557ea1f58f88f464419cfda8b18b6ffa15a95

SHA256
4b80a8b70c6747147dcda5fde12cc8902b3718b170eb980946bb86fa13d8ba2f

SHA512
bc6509fee9f95d5ba21d3113b2d9f49cb16bdd5d0c9418e7dc330b687749bc8102e9c6d3f8cab60aebad982a4472712d37fa28cd9b00340af1d3378d52723f6e

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
b0b1b2ce3d7548b46841b09560f9b1f2

SHA1
5f05a88a74eb2c47078e6c41c25ebda484b45db4

SHA256
78af6438e64841ed977e12fccb2e875bfc6b9a7efdf4bca82f6f32606fb87561

SHA512
5c29203a0ad41efe4b9ced47b322b81d3a3b44950f9ca0bc936f6699ea2837794fe5e7cf59fd22b5b1b00b5145e372c3f2b82cc9c54795e3fd95b0664fce4943

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