wannacry | d22e7b922b25053d90483bdbbade13f32e696d985e63a4e708e323776104a2ad

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
10-05-2024 09:29

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General

Target

2e76c81c9530f5cc9c0d175d54edd0fb_JaffaCakes118.dll
Size

5.0MB
MD5

2e76c81c9530f5cc9c0d175d54edd0fb
SHA1

cd7faf8d128990e2c962e1754df16dc5e434e847
SHA256

d22e7b922b25053d90483bdbbade13f32e696d985e63a4e708e323776104a2ad
SHA512

b54f176c3b2d77d484b2c03cc309a06f8a130935c51d1e097c5efa8df20d6aa447d819931b72c0e7dbb5f077cfe3567543c614ad572a5ccc95f8fe74e3201328
SSDEEP

12288:yebLgPlu+QhMbaIMu7L5NVErCA4z2g6rTcbckPU82900Ve7XWd1R:zbLgddQhfdmMSirYbcMNger

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3143) 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

548 mssecsvc.exe
4004 mssecsvc.exe
2352 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:

mssecsvc.exerundll32.exe

description ioc process

File created C:\WINDOWS\tasksche.exe mssecsvc.exe
File created C:\WINDOWS\mssecsvc.exe rundll32.exe

pid	process
548	mssecsvc.exe
4004	mssecsvc.exe
2352	tasksche.exe

description	ioc	process
File created	C:\WINDOWS\tasksche.exe	mssecsvc.exe
File created	C:\WINDOWS\mssecsvc.exe	rundll32.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 1220 wrote to memory of 2816	1220	rundll32.exe	rundll32.exe
PID 1220 wrote to memory of 2816	1220	rundll32.exe	rundll32.exe
PID 1220 wrote to memory of 2816	1220	rundll32.exe	rundll32.exe
PID 2816 wrote to memory of 548	2816	rundll32.exe	mssecsvc.exe
PID 2816 wrote to memory of 548	2816	rundll32.exe	mssecsvc.exe
PID 2816 wrote to memory of 548	2816	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\2e76c81c9530f5cc9c0d175d54edd0fb_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1220

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\2e76c81c9530f5cc9c0d175d54edd0fb_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2816

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:548

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2352

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:4004

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
a272f15f52baecfeafc3bb2b0c76bd6f

SHA1
90f49ef1c4c82a6ccca59f4ab6f138ad6a9b2664

SHA256
6cbb3ea756bfe97b09cca1ecf73bc525ec89f5481225e0127d7c636fc1a553f0

SHA512
3866b47c1f4822b781f252204c0cd3173ffb27ee9271d1dbeb0d4a427721800e9b0ea3c06b67ea7e82c9549d5dc667535d99be348b4bfb98ac1d3d293bec86a0

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
d27fe9d8280325738592dd216a92fb09

SHA1
c9ba98c9cf5a89ae5919b5594dbb623e0e18567f

SHA256
25dfc1268383e3255083e3df3cb14f411631c92178fe329dee2f3a5f85987eb8

SHA512
3b8410145d7718a57105ab5d4218278c64ec50695ab5743ef2b28a369036051304d99e18b8bcf210dc7d7729b66b83203a348853f83deb002c94c3e5538e8874

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