wannacry | fc876af5eaef6fece93d5de99c403837eaf370558a206fb8ed37abfbe838d7c6

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
05-05-2024 04:04

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General

Target

15e4ec8db5c9de6f88683e7af25b00aa_JaffaCakes118.dll
Size

5.0MB
MD5

15e4ec8db5c9de6f88683e7af25b00aa
SHA1

0aec8e94906404bb96aec4b9bcb11ecf5d135f92
SHA256

fc876af5eaef6fece93d5de99c403837eaf370558a206fb8ed37abfbe838d7c6
SHA512

569999ba8c96ecced0d45f93e59f0913e340a3ae97780a181067ef79e4abc20f6ea0ba008d76b37f7fc2425b9e84df2a5380f9c1d2f53a68c9aff48c32b7ab79
SSDEEP

98304:+DqPoBhz1aRxcSUDk36SAEdhvxWa9P593:+DqPe1Cxcxk3ZAEUadz

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3171) 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

3912 mssecsvc.exe
1688 mssecsvc.exe
4500 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
3912	mssecsvc.exe
1688	mssecsvc.exe
4500	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 1240 wrote to memory of 1732	1240	rundll32.exe	rundll32.exe
PID 1240 wrote to memory of 1732	1240	rundll32.exe	rundll32.exe
PID 1240 wrote to memory of 1732	1240	rundll32.exe	rundll32.exe
PID 1732 wrote to memory of 3912	1732	rundll32.exe	mssecsvc.exe
PID 1732 wrote to memory of 3912	1732	rundll32.exe	mssecsvc.exe
PID 1732 wrote to memory of 3912	1732	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\15e4ec8db5c9de6f88683e7af25b00aa_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1240

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\15e4ec8db5c9de6f88683e7af25b00aa_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1732

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:3912

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:4500

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:1688

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
6f310920edff3c84a45e35bcfd0ff2c8

SHA1
a66dc06934b5d8ef2c28dbbe27dc9db68d778d31

SHA256
319aaced3afbfa56cb9747b8db890eca873b524fa5f2ca14be10a942392e07d0

SHA512
2cdec2718f712b088c5b0b56e9be617b1af927f8f1ef0858841353b4d3b1a4c7f1b8b0a954ae7f5e250f3a456c596286dc69411433a9a776723cc386a39a59b2

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
0df88d2736c354348cc927d3fa3e6032

SHA1
496bfd729b0d2043f8f585d4e6bd3384ab5410d5

SHA256
02a9d389c598159d11719b99c241a03fb3f7900691872ea216a0dae43b2b830f

SHA512
d8325c77bb0adb4804346decda5fafcb69163689b7f0896ca8867969f87b8d39f749bf8f40a0a546e652bc18bc93d02bc2c6480c2180fb8d58eb45bf67bc5833

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