wannacry | 42fceb80ac61e4bbe6df61a648ea17971bfb8ef4a7e62937cf1ede95165eb937

Analysis

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

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
30-04-2024 04:08

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General

Target

08fcc691d7754903c5416a297dd1dbc8_JaffaCakes118.dll
Size

5.0MB
MD5

08fcc691d7754903c5416a297dd1dbc8
SHA1

de7e6b86cb14a6e505b0a5a76647807b9ec7f2dd
SHA256

42fceb80ac61e4bbe6df61a648ea17971bfb8ef4a7e62937cf1ede95165eb937
SHA512

7209a5803a4bf03aa4b436f16815a0d1696b9636de6fae24869731be76caeb125c652b0fd2f33d67cd70a4bd555987ab61fa54e9c47597fbdb17882a7b07488b
SSDEEP

98304:TDqPoBhz1aRLSUDk36SAEdhvxWa9P593R8yAVp2H:TDqPe1CLxk3ZAEUadzR8yc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3360) 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

4276 mssecsvc.exe
4512 mssecsvc.exe
4020 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
4276	mssecsvc.exe
4512	mssecsvc.exe
4020	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 4756 wrote to memory of 1932	4756	rundll32.exe	rundll32.exe
PID 4756 wrote to memory of 1932	4756	rundll32.exe	rundll32.exe
PID 4756 wrote to memory of 1932	4756	rundll32.exe	rundll32.exe
PID 1932 wrote to memory of 4276	1932	rundll32.exe	mssecsvc.exe
PID 1932 wrote to memory of 4276	1932	rundll32.exe	mssecsvc.exe
PID 1932 wrote to memory of 4276	1932	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\08fcc691d7754903c5416a297dd1dbc8_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4756

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\08fcc691d7754903c5416a297dd1dbc8_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1932

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:4276

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:4020

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:4512

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
480ce0c2338d788424e8e61ad8301d04

SHA1
956b6609c9e6a8544b42dd877566cfebb5123391

SHA256
d66c922d659d7c37e968d061a4b0227884b1fd34dc17c23798fe50e08d7c8ba6

SHA512
3d55c09aa60b18861ea92eb555d8c04bf8d9d4a836395bc83bde19886fb57ea7852d2431570fbb971816aba7d60a1ad2f1209c0dc8324ac83065ee0aff8f174a

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
efa6ff40e62a14e1a14a2ca271e59c6f

SHA1
8c07fcbecfa9e0847fcfa28ff35c7912c7c10b90

SHA256
16a193003d91e8532d21050de329fa733d6b52a1274a6a7039b11deccacf9908

SHA512
1212c650c2e03edc60e1ab917cde8fc310baf81a9ab7e9def2e3ad9ba18df04a838900167e4fc4bbfce7b157619dcee2537edd092a6e3320d42376c2e56384d4

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