wannacry | aba57fccc8744a927718aa029ddffd928775761a9baa8acf7df9752d52fd1000

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
05-05-2024 00:45

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General

Target

15383b74b2a3c0b39526bb03c6a264ca_JaffaCakes118.dll
Size

5.0MB
MD5

15383b74b2a3c0b39526bb03c6a264ca
SHA1

96cdbfa321137f0f3c2700faf4e0d3987b3eb2f4
SHA256

aba57fccc8744a927718aa029ddffd928775761a9baa8acf7df9752d52fd1000
SHA512

62ca5a18f4aa8f587195e85af3ef5553c88313f7c1d07293f2440b6080576ff4d87636c569e556ee11af960070d26bcaa3e36a25de60b8e44cb373e7061cb25e
SSDEEP

98304:TDqPoBexcSUDk36SAEdhvxWa9P593R8yAVp2H:TDqP1xcxk3ZAEUadzR8yc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3380) 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

3316 mssecsvc.exe
4852 mssecsvc.exe
2292 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
3316	mssecsvc.exe
4852	mssecsvc.exe
2292	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 4408 wrote to memory of 2948	4408	rundll32.exe	rundll32.exe
PID 4408 wrote to memory of 2948	4408	rundll32.exe	rundll32.exe
PID 4408 wrote to memory of 2948	4408	rundll32.exe	rundll32.exe
PID 2948 wrote to memory of 3316	2948	rundll32.exe	mssecsvc.exe
PID 2948 wrote to memory of 3316	2948	rundll32.exe	mssecsvc.exe
PID 2948 wrote to memory of 3316	2948	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\15383b74b2a3c0b39526bb03c6a264ca_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4408

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\15383b74b2a3c0b39526bb03c6a264ca_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2948

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:3316

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2292

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:4852

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
5d3c9b1902af41e6c627140ad21ca749

SHA1
76b3889b86abbe9974b68e6460c0034e9ed8cfa9

SHA256
4ce877e4f983b07fe709bf960ea6e85d99256042b039ae60385848c3ffd52b12

SHA512
c57fe88910b8d20f05cabc2accb9ccb56c779e43fcb815ac6a3004d915d667cfc847c5803cf20b9a1e2cde8cdf5cba2783736f736a9541ecd3bc4a16e8d41f0e

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
8384c90ffabb19fde1a9700dc06f8c5f

SHA1
9b785093a6d4fae353594f88f4b35399a800d3f9

SHA256
74e755c32894955471dabdcc1117b183353c8c1b46710eb7804131a31a6a0630

SHA512
c879dedbfc85603cd5c878744c337f3346fa3a546aac0a6fdd09e79507160e64b99c915c8941e57603456b41f621472ba1b2106a2d03894732e004decbd17242

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