wannacry | e14c4af56e582c40f4ece66346fb341665fe422ec45ab490e55bf546cd799f31

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
18-05-2024 17:05

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General

Target

55d6d83f66f0917fba7cce7f960a18a6_JaffaCakes118.dll
Size

5.0MB
MD5

55d6d83f66f0917fba7cce7f960a18a6
SHA1

83e8bb1c117a4506ac850edd7708370406091cac
SHA256

e14c4af56e582c40f4ece66346fb341665fe422ec45ab490e55bf546cd799f31
SHA512

1644f905a85348fcf84b318ae1bf8e67e0af49fc4d11190474d367e0b6b2712bfece1a8a944fc5d139a2af9086154d8989f839c8cf6d33fac5a174727d3e27e2
SSDEEP

98304:+DqPoBhz1aRxcSUDk36SAEdhvxWa9P55Z:+DqPe1Cxcxk3ZAEUadz

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3171) 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

4416 mssecsvc.exe
3976 mssecsvc.exe
2384 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
4416	mssecsvc.exe
3976	mssecsvc.exe
2384	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 3500 wrote to memory of 4136	3500	rundll32.exe	rundll32.exe
PID 3500 wrote to memory of 4136	3500	rundll32.exe	rundll32.exe
PID 3500 wrote to memory of 4136	3500	rundll32.exe	rundll32.exe
PID 4136 wrote to memory of 4416	4136	rundll32.exe	mssecsvc.exe
PID 4136 wrote to memory of 4416	4136	rundll32.exe	mssecsvc.exe
PID 4136 wrote to memory of 4416	4136	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\55d6d83f66f0917fba7cce7f960a18a6_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3500

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\55d6d83f66f0917fba7cce7f960a18a6_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:4136

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:4416

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2384

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:3976

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
3f069f13df7db42862272880b613074c

SHA1
1092536b10666888c982896f8be723d0479abb33

SHA256
d3cc85338cb8a2def7443326b60509a9abc4ece30873ab70b72645c93eb9e715

SHA512
0e28095c1b7d1d521619b4f64ccd6353d72f4647c9a8d49e6df6298dec5291306bf491af926bd2be0ee77979cf373711b8bc16a606d6cd69c1dc9e549b391e0b

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
2b55e80e1d6210d8f3908509b5c1d90e

SHA1
60f9b7ec3f252edf000b7133b2f7caa1e35a8bda

SHA256
b5c8d77410731921d09d5260a3cc3baae2b3ec350e5b2152af692e2a40f19684

SHA512
16b007b42a037a391bbe55a3d5fd1567a35fdd024811069ff8c455dbadada9558dd587e5d41d647ea2801a5990e1b5ce6a52369dbb27dfa985588eeb2003a197

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