wannacry | 43eb8b457d85e28d41061644f6559627605cb22be446c1e5629d2bdaa75cd9ac

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
07-05-2024 23:04

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General

Target

221da742042dcc298ae036cb8980377c_JaffaCakes118.dll
Size

5.0MB
MD5

221da742042dcc298ae036cb8980377c
SHA1

f1efdd52ef577eb524f3d3e8b6a491f47556384b
SHA256

43eb8b457d85e28d41061644f6559627605cb22be446c1e5629d2bdaa75cd9ac
SHA512

f9500f0246cbb53272ff1c41f25e7f3910040068e6abd01083ec8050033ef46bd359de1d9b38dfaf76cbfa6cc330d017cc9fadf913d9a24235e307f5d8449839
SSDEEP

98304:+DqPoBhz1aRxcSUDk36SADYoP3R8yAVp2H:+DqPe1Cxcxk3ZAXR8yc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3293) 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

4036 mssecsvc.exe
2660 mssecsvc.exe
3168 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
4036	mssecsvc.exe
2660	mssecsvc.exe
3168	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\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
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

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1088 wrote to memory of 4600	1088	rundll32.exe	rundll32.exe
PID 1088 wrote to memory of 4600	1088	rundll32.exe	rundll32.exe
PID 1088 wrote to memory of 4600	1088	rundll32.exe	rundll32.exe
PID 4600 wrote to memory of 4036	4600	rundll32.exe	mssecsvc.exe
PID 4600 wrote to memory of 4036	4600	rundll32.exe	mssecsvc.exe
PID 4600 wrote to memory of 4036	4600	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\221da742042dcc298ae036cb8980377c_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1088

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\221da742042dcc298ae036cb8980377c_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:4600

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:4036

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:3168

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:2660

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
a13f75aa6f4911570841a9d5aa7e2499

SHA1
b25916ee75a62376c9c50976d9fdc29a537f3366

SHA256
9d52cc156a518a35542d1780a1eaf04939a917ddec039a96f2846fc09ddc139c

SHA512
f0b4c7da006535909ff247f5d80f5f8e9a261b6090125155bea5e327b9f0a1a4ed604c9acbb02c8abfaf4d39ad9ef028ae65ca7733ec6bb79f744a3b0db7f162

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
e6b7a6e8edb9536703747f47be11526e

SHA1
3d50e0508cab4b9fbfe89e7a3162de10dc36c38a

SHA256
87306aaf0d65f9144bf6f84236bc604f59993b891a59906cec340b66edc128ff

SHA512
86b5f8cba5d15bf00a709192c287befd96900e8124864a54d50f860ad32304f3afc77a7a56e6b9c175c7b58cf4e4d2d77ed239ba7b60717414d89438d6eb322e

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