wannacry | 7cf6d0543975e3f4c2b0feae75fee701aa37f3ea441c575ad45e808d4ccdc089

Analysis

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

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
02-06-2024 09:13

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General

Target

8d92dd74686187bf411fc0898848d77f_JaffaCakes118.dll
Size

5.0MB
MD5

8d92dd74686187bf411fc0898848d77f
SHA1

e685f2473c65ff02e897ed428a335222b7f8149d
SHA256

7cf6d0543975e3f4c2b0feae75fee701aa37f3ea441c575ad45e808d4ccdc089
SHA512

e50852922f4e14592e8cae486d7186c65327b3b9bf6e01038beae2606f020ea593fa145dafadfbfb9c9445cea0e86b292f6e1cc6f2d0134bc4005fa4e8ce5a37
SSDEEP

98304:+DqPoBhz1aRxcSUDk36SA9hvxWa9P593R8yAVp2H:+DqPe1Cxcxk3ZA0adzR8yc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3279) 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

4868 mssecsvc.exe
4132 mssecsvc.exe
2372 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
4868	mssecsvc.exe
4132	mssecsvc.exe
2372	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 4640 wrote to memory of 4776	4640	rundll32.exe	rundll32.exe
PID 4640 wrote to memory of 4776	4640	rundll32.exe	rundll32.exe
PID 4640 wrote to memory of 4776	4640	rundll32.exe	rundll32.exe
PID 4776 wrote to memory of 4868	4776	rundll32.exe	mssecsvc.exe
PID 4776 wrote to memory of 4868	4776	rundll32.exe	mssecsvc.exe
PID 4776 wrote to memory of 4868	4776	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\8d92dd74686187bf411fc0898848d77f_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4640

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\8d92dd74686187bf411fc0898848d77f_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:4776

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:4868

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2372

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:4132

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
cf50fe69eda29727bb69c4bb5e99848c

SHA1
2c11a5e5a180583b0950640d4339fe0b17ac009b

SHA256
5d3ce6eefb59d2e5e19d86cfa28ac4257fad770b855cd46f526519d6dca80b9c

SHA512
4f544eaaafbb007ab67a84f66c30edaca968164a711a58360c0543d3db4588b3cb2b98c75f0bc0731576b4812f00161f07b856be738f0168320b2677bb871eee

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
3de480b686405b531e54b7d5ce69fb2d

SHA1
944bcd7657eab8724f4ad04965d086df5e43d13a

SHA256
4097a557488f4731a6c7f50a9e1b727fe41bae347ae863dc0996efe62b15cdd4

SHA512
8e36a695287bdfdb1169c2df2ed32feda49fac8d22072fe72b15b2774a14044df131a0d9d664bcfcd3ed4c7cafb451fde1296463e62f4e8c376ce60197a0a1c8

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