wannacry | 892aa85369aec7332bbf24998001a8b8ea8e5bb0ad97cc02d041991e25c0ebfa

Analysis

max time kernel
150s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
06-06-2024 01:11

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General

Target

99ad8aeda4eef76eb75a1a4b7323473d_JaffaCakes118.dll
Size

5.0MB
MD5

99ad8aeda4eef76eb75a1a4b7323473d
SHA1

920bb8782bfa9fd1613f3dd588c27ce367d9700c
SHA256

892aa85369aec7332bbf24998001a8b8ea8e5bb0ad97cc02d041991e25c0ebfa
SHA512

007aa0e7604ecf90a1f6b10566dd85353bb1a2ff586392a2eb1e66aba74e863442497f1098053e8a84be45a0240394ddc2c290824641af4af62eb00eb71be73f
SSDEEP

12288:yebLgPlu+QhMbaIMu7L5NVErCA4z2g6rTcbckPU82900Ve7zw+K+DHh5vR5CAvg:zbLgddQhfdmMSirYbcMNgef0QB4

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3133) 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

1276 mssecsvc.exe
452 mssecsvc.exe
3080 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
1276	mssecsvc.exe
452	mssecsvc.exe
3080	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\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
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	mssecsvc.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1848 wrote to memory of 4460	1848	rundll32.exe	rundll32.exe
PID 1848 wrote to memory of 4460	1848	rundll32.exe	rundll32.exe
PID 1848 wrote to memory of 4460	1848	rundll32.exe	rundll32.exe
PID 4460 wrote to memory of 1276	4460	rundll32.exe	mssecsvc.exe
PID 4460 wrote to memory of 1276	4460	rundll32.exe	mssecsvc.exe
PID 4460 wrote to memory of 1276	4460	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\99ad8aeda4eef76eb75a1a4b7323473d_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1848

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\99ad8aeda4eef76eb75a1a4b7323473d_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:4460

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:1276

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:3080

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:452

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
96ade48aeaec022c4b097b23d9a7f721

SHA1
42b7aef0687901448b07d9cebf735c1aceb49cd2

SHA256
3f9e73320e9c017abfedf726c9259f307110e24e945184bc9fb23cce029d696c

SHA512
521712e6a962e33efbabd678c02316109a6b166908c5ba0ab96084f29204c0ec964ae4219ee8c60be7261c12d0cd298e8074c8a43955c712d3ead8397f8c2ef7

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
56389647faf37d8c938d344af61e2baf

SHA1
fc1b2eb144adba2b4eedb75d2cf80b1b0982a4fc

SHA256
fce09976e7befb6472fe8f658d6234a948c00e860c757384dc69198cf713c5db

SHA512
60597bcd70900557b4483a96254038682c4913aafe825ece9589066a395da2bdcc668ef840cccb689b8cf4e302817d0ee1da3f28242e75224de22474b1962b7e

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