wannacry | 6c2f7aea20e57f9952db32d9aa0170050bde7c32593f8eaaa7d8ab554dada844

Analysis

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

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
30-04-2024 00:35

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General

Target

089d39d2d97f5fa30023de208e8ddac8_JaffaCakes118.dll
Size

5.0MB
MD5

089d39d2d97f5fa30023de208e8ddac8
SHA1

ab03eb1c1504b794576a2ff458bf10386e697bff
SHA256

6c2f7aea20e57f9952db32d9aa0170050bde7c32593f8eaaa7d8ab554dada844
SHA512

b5e941a0f69809cf4ddfa10cbb9083e983d7dcea533fd5347437dd452a6b80b0e80acb47844b48cac6ef0d07b63bee5556c0af7f6ebe399cfac81f62ea829cbe
SSDEEP

98304:+DqPoBhz1aRxcSUDk36SAEdhvxWa982H:+DqPe1Cxcxk3ZAEUaNH

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3202) 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

2516 mssecsvc.exe
4700 mssecsvc.exe
1028 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
2516	mssecsvc.exe
4700	mssecsvc.exe
1028	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
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
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	mssecsvc.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 4568 wrote to memory of 2392	4568	rundll32.exe	rundll32.exe
PID 4568 wrote to memory of 2392	4568	rundll32.exe	rundll32.exe
PID 4568 wrote to memory of 2392	4568	rundll32.exe	rundll32.exe
PID 2392 wrote to memory of 2516	2392	rundll32.exe	mssecsvc.exe
PID 2392 wrote to memory of 2516	2392	rundll32.exe	mssecsvc.exe
PID 2392 wrote to memory of 2516	2392	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\089d39d2d97f5fa30023de208e8ddac8_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4568

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\089d39d2d97f5fa30023de208e8ddac8_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2392

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:2516

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:1028

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:4700

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
0e479d64fcd09a50725ede61b09aa2a9

SHA1
a339c28e81d113808155f67cd85a745a41d659ed

SHA256
778a5525fcf685a1f05d2944540a145f420b1f27a8c54816fea13a0ba128d18f

SHA512
687443fec47b2986779e1e14adec1ce346351f1512eae2598bab770d622d00c136e8ca8eede0cf31067ab223ea4e1682b2bd9b4409d008c1380e391713c3b560

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
377cb7090244bcd916441c9dd7908ea1

SHA1
3d0bc6a91afb95b2495a1574cb907a6dd9b03a3c

SHA256
2d258f30eae5f7d2215ce48e005cd61d19f334c5fab5f83e4f6a190b61497046

SHA512
f27084352ce38b43939e410affcd188cc5ccc6c48df30b62329fdf5dc2a2ce2439dbebb7e0d88403195f370a9e3307b6b378e8d7b314ee4575cd8410349c6855

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