wannacry | 1cd20b7e2c44e83f24171e30ce9ae1ca9472fe21390c5adad316c950ba5d8aad

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
30-04-2024 00:02

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General

Target

088db61bc2fd814f90d823eef06d43bc_JaffaCakes118.dll
Size

5.0MB
MD5

088db61bc2fd814f90d823eef06d43bc
SHA1

11da20f275d7c348a09a40a0e19534a88d2f8f3f
SHA256

1cd20b7e2c44e83f24171e30ce9ae1ca9472fe21390c5adad316c950ba5d8aad
SHA512

0f95adcd936246fbe8a2e8bcce435ef14cc1921d95acd418cf0379d8cf1c1b059513a08ddced96e0eac609b82ef1d55ccc15fc0dad25b8138bb308325e33f5c3
SSDEEP

49152:SnAQqMSPbcBVQej/1INRx+TSqTdd1HkQ2AMEc1:+DqPoBhz1aRxcSUZk157

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (2667) 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

1348 mssecsvc.exe
2788 mssecsvc.exe
4548 tasksche.exe
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
1348	mssecsvc.exe
2788	mssecsvc.exe
4548	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 5104 wrote to memory of 3916	5104	rundll32.exe	rundll32.exe
PID 5104 wrote to memory of 3916	5104	rundll32.exe	rundll32.exe
PID 5104 wrote to memory of 3916	5104	rundll32.exe	rundll32.exe
PID 3916 wrote to memory of 1348	3916	rundll32.exe	mssecsvc.exe
PID 3916 wrote to memory of 1348	3916	rundll32.exe	mssecsvc.exe
PID 3916 wrote to memory of 1348	3916	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\088db61bc2fd814f90d823eef06d43bc_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:5104

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\088db61bc2fd814f90d823eef06d43bc_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:3916

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:1348

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:4548

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:2788

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
21dd3ebeacda1f5fd688d51b34b98ee0

SHA1
5e9f5de0952f1e8331f408b17d2f29fb79607f46

SHA256
d74531831a60990c90412b444ebddeb5490c3ea4c584955d8acfa01b0fb753e1

SHA512
ebbf97cdab383daa4d7a2aba0065eb08873fbb6df1b4fbd773ef82aeb9d67e1e2b1e69c22292b15ae5c3b1f215b8d7d69db01fc232dee405f1c6d2855c5504bf

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
bd68305c7fee05433b8d6149813c94b4

SHA1
f1603e1fdfd3afaa01e547a6f48a10542ddaa292

SHA256
adfe293c1be1efa39317344cc77343183552f75e9916390064964eacdc97acf2

SHA512
b23d1d106fbd26207d43051585e2f12839c11657c7bdcfe1a8acfbd65cf8015d33d7792927267c4c24061ee3c2512867d6023a518c04b6fae016d5193d3edafe

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